Built 2026-10-14 (14 October 2026)

Grand Rapids Forestry Lab Weather Records (USC00213303)

Record envelope, standing records and threshold days for Grand Rapids Forestry Lab (USC00213303), Minnesota, United States, with 112 years of record.

Key Facts for Grand Rapids Forestry Lab

  • Grand Rapids Forestry Lab (USC00213303) is a weather station in Minnesota, United States at 47.24 latitude and -93.50 longitude, 399 m (1,310 ft) above sea level.
  • The station reports from 1915 to 2026, 112 years of record.
  • 1,464 records set at Grand Rapids Forestry Lab still stand.
  • Records are tracked for tmax, tmin, prcp, snow, snwd: an element needs 30 years of data to be eligible.
  • Grand Rapids Forestry Lab set a daily record high minimum temperature of 16.1 C (61.0 F) on 29 September 2026 (provisional).

Provisional Records

Records set in the last 60 days are provisional until they clear the revision window.

About the Station

  • Location: Minnesota, United States, 47.24 latitude, -93.50 longitude.
  • Elevation: 399 m (1,310 ft).
  • Period of record: 1915 to 2026, 112 years.
  • Eligible elements: tmax, tmin, prcp, snow, snwd.

Daily Record Envelope and 2026

5 days at or beyond a record
Daily record high and record low at Grand Rapids Forestry Lab, with 2026 drawn through them The band shows the record high and record low for each calendar day at Grand Rapids Forestry Lab. The lines show the 2026 daily maximum and minimum. 5 days in 2026 matched or passed a record. Temperatures are in degrees Celsius. -60-40-2002040 JanFebMarAprMayJunJulAugSepOctNovDec
The band shows the record high and record low for each calendar day at Grand Rapids Forestry Lab. The lines show the 2026 daily maximum and minimum. 5 days in 2026 matched or passed a record. Temperatures are in degrees Celsius.
Daily record high and record low at Grand Rapids Forestry Lab, with 2026 drawn through them
MonthHighest record highLowest record low2026 highest maximum2026 lowest minimum
Jan11.7 C (53.1 F)-46.1 C (-51.0 F)5.6 C (42.1 F)-35.0 C (-31.0 F)
Feb16.1 C (61.0 F)-42.8 C (-45.0 F)11.1 C (52.0 F)-27.2 C (-17.0 F)
Mar26.7 C (80.1 F)-39.4 C (-38.9 F)19.4 C (66.9 F)-24.4 C (-11.9 F)
Apr33.9 C (93.0 F)-23.3 C (-9.9 F)27.8 C (82.0 F)-13.9 C (7.0 F)
May38.3 C (100.9 F)-11.7 C (10.9 F)33.9 C (93.0 F)-4.4 C (24.1 F)
Jun37.8 C (100.0 F)-4.4 C (24.1 F)31.1 C (88.0 F)5.6 C (42.1 F)
Jul40.0 C (104.0 F)0.6 C (33.1 F)35.6 C (96.1 F)8.9 C (48.0 F)
Aug37.8 C (100.0 F)-2.8 C (27.0 F)29.4 C (84.9 F)7.8 C (46.0 F)
Sep37.2 C (99.0 F)-9.4 C (15.1 F)25.0 C (77.0 F)11.7 C (53.1 F)
Oct31.7 C (89.1 F)-19.4 C (-2.9 F)n/an/a
Nov23.3 C (73.9 F)-31.7 C (-25.1 F)n/an/a
Dec15.0 C (59.0 F)-42.8 C (-45.0 F)n/an/a

Which Years Hold Standing Records

1,464 standing records
Standing records at Grand Rapids Forestry Lab by the year they were set 1,464 records at Grand Rapids Forestry Lab still stand. 1936 holds the most, with 43. 02040601915: 151916: 231917: 311918: 211919: 291920: 231921: 251922: 121923: 271924: 221925: 231926: 131927: 151928: 121929: 231930: 221931: 211932: 141933: 141934: 171935: 191936: 431937: 71938: 91939: 291940: 131941: 131942: 131943: 51944: 111945: 221946: 181947: 171948: 171949: 61950: 171951: 161952: 181953: 101954: 81955: 101956: 131957: 11958: 71959: 161960: 21961: 131962: 181963: 121964: 161965: 131966: 91967: 111968: 71969: 61970: 81971: 51972: 121973: 101974: 101975: 31976: 101977: 81978: 71979: 61980: 101981: 31982: 71983: 131984: 141985: 141986: 71987: 151988: 121989: 191990: 161991: 291992: 81993: 101994: 71995: 151996: 131997: 81998: 161999: 122000: 162001: 112002: 72003: 122004: 102005: 92006: 122007: 52008: 42009: 102010: 112011: 62012: 172013: 62014: 102015: 112016: 92017: 142018: 72019: 72020: 112021: 142022: 42023: 122024: 142025: 152026: 61915192719391951196319751987199920112023
1,464 records at Grand Rapids Forestry Lab still stand. 1936 holds the most, with 43.
Standing records at Grand Rapids Forestry Lab by the year they were set
Year setStanding records
191515
191623
191731
191821
191929
192023
192125
192212
192327
192422
192523
192613
192715
192812
192923
193022
193121
193214
193314
193417
193519
193643
19377
19389
193929
194013
194113
194213
19435
194411
194522
194618
194717
194817
19496
195017
195116
195218
195310
19548
195510
195613
19571
19587
195916
19602
196113
196218
196312
196416
196513
19669
196711
19687
19696
19708
19715
197212
197310
197410
19753
197610
19778
19787
19796
198010
19813
19827
198313
198414
198514
19867
198715
198812
198919
199016
199129
19928
199310
19947
199515
199613
19978
199816
199912
200016
200111
20027
200312
200410
20059
200612
20075
20084
200910
201011
20116
201217
20136
201410
201511
20169
201714
20187
20197
202011
202114
20224
202312
202414
202515
20266

All-Time Record Progression

6 new records
When Grand Rapids Forestry Lab set new all-time records 6 all-time records were set at Grand Rapids Forestry Lab between 9 October 1973 and 18 November 2016. Each dot is a new record. Record daily precipitationRecord snow depthRecord daily snowfall9 October 1973: Record daily precipitation 112.8 mm (4.4 in)4 March 1997: Record snow depth 91.4 cm (36.0 in)22 June 2002: Record daily precipitation 114.3 mm (4.5 in)6 April 2008: Record daily snowfall 36.8 cm (14.5 in)19 June 2012: Record daily precipitation 121.4 mm (4.8 in)18 November 2016: Record daily snowfall 43.2 cm (17.0 in)1980199020002010
6 all-time records were set at Grand Rapids Forestry Lab between 9 October 1973 and 18 November 2016. Each dot is a new record.
When Grand Rapids Forestry Lab set new all-time records
DateKindDetail
1973-10-09Record daily precipitationRecord daily precipitation 112.8 mm (4.4 in)
1997-03-04Record snow depthRecord snow depth 91.4 cm (36.0 in)
2002-06-22Record daily precipitationRecord daily precipitation 114.3 mm (4.5 in)
2008-04-06Record daily snowfallRecord daily snowfall 36.8 cm (14.5 in)
2012-06-19Record daily precipitationRecord daily precipitation 121.4 mm (4.8 in)
2016-11-18Record daily snowfallRecord daily snowfall 43.2 cm (17.0 in)

Wettest Day of Each Month

Jun: 121.4 mm (4.8 in)
Record daily precipitation for each month at Grand Rapids Forestry Lab The wettest day on record for each calendar month at Grand Rapids Forestry Lab. The most was 121.4 mm (4.8 in) on 19 June 2012. 050100150 Jan: 31.8 mm (1.3 in), 4 January 1997 Jan Feb: 36.8 mm (1.4 in), 1 February 1922 Feb Mar: 57.4 mm (2.3 in), 23 March 2009 Mar Apr: 48.8 mm (1.9 in), 3 April 1940 Apr May: 79.8 mm (3.1 in), 1 May 1955 May Jun: 121.4 mm (4.8 in), 19 June 2012 Jun Jul: 105.7 mm (4.2 in), 2 July 1978 Jul Aug: 111.0 mm (4.4 in), 3 August 1983 Aug Sep: 100.1 mm (3.9 in), 2 September 1937 Sep Oct: 112.8 mm (4.4 in), 9 October 1973 Oct Nov: 57.7 mm (2.3 in), 18 November 2016 Nov Dec: 31.5 mm (1.2 in), 24 December 2023 Dec
The wettest day on record for each calendar month at Grand Rapids Forestry Lab. The most was 121.4 mm (4.8 in) on 19 June 2012.
Record daily precipitation for each month at Grand Rapids Forestry Lab
MonthRecord daily precipitation (mm)Date
Jan31.8 mm (1.3 in)4 January 1997
Feb36.8 mm (1.4 in)1 February 1922
Mar57.4 mm (2.3 in)23 March 2009
Apr48.8 mm (1.9 in)3 April 1940
May79.8 mm (3.1 in)1 May 1955
Jun121.4 mm (4.8 in)19 June 2012
Jul105.7 mm (4.2 in)2 July 1978
Aug111.0 mm (4.4 in)3 August 1983
Sep100.1 mm (3.9 in)2 September 1937
Oct112.8 mm (4.4 in)9 October 1973
Nov57.7 mm (2.3 in)18 November 2016
Dec31.5 mm (1.2 in)24 December 2023

Period of Record Coverage

1915 to 2026
Days with data per year at Grand Rapids Forestry Lab 112 years of record at Grand Rapids Forestry Lab, 1915 to 2026. 3 years have data for under 90 percent of days and are left out of rankings: 1915, 2023, 2026. 1915: 211 of 365 days1916: 364 of 366 days1917: 359 of 365 days1918: 358 of 365 days1919: 364 of 365 days1920: 365 of 366 days1921: 363 of 365 days1922: 363 of 365 days1923: 365 of 365 days1924: 365 of 366 days1925: 365 of 365 days1926: 362 of 365 days1927: 360 of 365 days1928: 363 of 366 days1929: 365 of 365 days1930: 359 of 365 days1931: 361 of 365 days1932: 365 of 366 days1933: 362 of 365 days1934: 364 of 365 days1935: 343 of 365 days1936: 365 of 366 days1937: 363 of 365 days1938: 343 of 365 days1939: 362 of 365 days1940: 365 of 366 days1941: 363 of 365 days1942: 362 of 365 days1943: 364 of 365 days1944: 365 of 366 days1945: 364 of 365 days1946: 364 of 365 days1947: 364 of 365 days1948: 365 of 366 days1949: 364 of 365 days1950: 365 of 365 days1951: 365 of 365 days1952: 365 of 366 days1953: 364 of 365 days1954: 365 of 365 days1955: 363 of 365 days1956: 365 of 366 days1957: 365 of 365 days1958: 365 of 365 days1959: 364 of 365 days1960: 366 of 366 days1961: 365 of 365 days1962: 365 of 365 days1963: 365 of 365 days1964: 366 of 366 days1965: 365 of 365 days1966: 365 of 365 days1967: 365 of 365 days1968: 366 of 366 days1969: 365 of 365 days1970: 365 of 365 days1971: 365 of 365 days1972: 366 of 366 days1973: 365 of 365 days1974: 364 of 365 days1975: 365 of 365 days1976: 366 of 366 days1977: 365 of 365 days1978: 365 of 365 days1979: 365 of 365 days1980: 364 of 366 days1981: 365 of 365 days1982: 364 of 365 days1983: 364 of 365 days1984: 365 of 366 days1985: 364 of 365 days1986: 364 of 365 days1987: 364 of 365 days1988: 366 of 366 days1989: 365 of 365 days1990: 365 of 365 days1991: 365 of 365 days1992: 366 of 366 days1993: 363 of 365 days1994: 364 of 365 days1995: 365 of 365 days1996: 365 of 366 days1997: 364 of 365 days1998: 365 of 365 days1999: 365 of 365 days2000: 366 of 366 days2001: 365 of 365 days2002: 365 of 365 days2003: 365 of 365 days2004: 366 of 366 days2005: 364 of 365 days2006: 365 of 365 days2007: 363 of 365 days2008: 335 of 366 days2009: 365 of 365 days2010: 365 of 365 days2011: 365 of 365 days2012: 366 of 366 days2013: 365 of 365 days2014: 365 of 365 days2015: 365 of 365 days2016: 366 of 366 days2017: 365 of 365 days2018: 353 of 365 days2019: 365 of 365 days2020: 356 of 366 days2021: 365 of 365 days2022: 365 of 365 days2023: 307 of 365 days2024: 366 of 366 days2025: 365 of 365 days2026: 245 of 365 days19201935195019651980199520102025
112 years of record at Grand Rapids Forestry Lab, 1915 to 2026. 3 years have data for under 90 percent of days and are left out of rankings: 1915, 2023, 2026.
Days with data per year at Grand Rapids Forestry Lab
YearDays with dataShare of yearComplete
191521158%No
191636499%Yes
191735998%Yes
191835898%Yes
1919364100%Yes
1920365100%Yes
192136399%Yes
192236399%Yes
1923365100%Yes
1924365100%Yes
1925365100%Yes
192636299%Yes
192736099%Yes
192836399%Yes
1929365100%Yes
193035998%Yes
193136199%Yes
1932365100%Yes
193336299%Yes
1934364100%Yes
193534394%Yes
1936365100%Yes
193736399%Yes
193834394%Yes
193936299%Yes
1940365100%Yes
194136399%Yes
194236299%Yes
1943364100%Yes
1944365100%Yes
1945364100%Yes
1946364100%Yes
1947364100%Yes
1948365100%Yes
1949364100%Yes
1950365100%Yes
1951365100%Yes
1952365100%Yes
1953364100%Yes
1954365100%Yes
195536399%Yes
1956365100%Yes
1957365100%Yes
1958365100%Yes
1959364100%Yes
1960366100%Yes
1961365100%Yes
1962365100%Yes
1963365100%Yes
1964366100%Yes
1965365100%Yes
1966365100%Yes
1967365100%Yes
1968366100%Yes
1969365100%Yes
1970365100%Yes
1971365100%Yes
1972366100%Yes
1973365100%Yes
1974364100%Yes
1975365100%Yes
1976366100%Yes
1977365100%Yes
1978365100%Yes
1979365100%Yes
198036499%Yes
1981365100%Yes
1982364100%Yes
1983364100%Yes
1984365100%Yes
1985364100%Yes
1986364100%Yes
1987364100%Yes
1988366100%Yes
1989365100%Yes
1990365100%Yes
1991365100%Yes
1992366100%Yes
199336399%Yes
1994364100%Yes
1995365100%Yes
1996365100%Yes
1997364100%Yes
1998365100%Yes
1999365100%Yes
2000366100%Yes
2001365100%Yes
2002365100%Yes
2003365100%Yes
2004366100%Yes
2005364100%Yes
2006365100%Yes
200736399%Yes
200833592%Yes
2009365100%Yes
2010365100%Yes
2011365100%Yes
2012366100%Yes
2013365100%Yes
2014365100%Yes
2015365100%Yes
2016366100%Yes
2017365100%Yes
201835397%Yes
2019365100%Yes
202035697%Yes
2021365100%Yes
2022365100%Yes
202330784%No
2024366100%Yes
2025365100%Yes
202624567%No

Latest Records

20
Latest records at Grand Rapids Forestry Lab
DateStationRecordValueBeat old record byOld record stoodSignificance
29 September 2026Grand Rapids Forestry Lab, USdaily high min (Provisional)16.1 C (61.0 F)1.1 C (2.0 F)44 years25 of 100 (Routine)
14 July 2026Grand Rapids Forestry Lab, USdaily high min22.2 C (72.0 F)1.1 C (2.0 F)48 years26 of 100 (Routine)
13 July 2026Grand Rapids Forestry Lab, USdaily high min24.4 C (75.9 F)5.0 C (9.0 F)12 years26 of 100 (Routine)
12 July 2026Grand Rapids Forestry Lab, USdaily high min22.8 C (73.0 F)1.1 C (2.0 F)60 years30 of 100 (Routine)
6 July 2026Grand Rapids Forestry Lab, USdaily rain34.3 mm (1.4 in)9.2 mm (0.36 in)13 years21 of 100 (Routine)
26 May 2026Grand Rapids Forestry Lab, USdaily high max33.9 C (93.0 F)1.7 C (3.1 F)8 years14 of 100 (Routine)
25 May 2026Grand Rapids Forestry Lab, USdaily high max (Tie)32.2 C (90.0 F)tie8 years3 of 100 (Routine)
5 May 2026Grand Rapids Forestry Lab, USdaily snowfall0.3 cm (0.1 in)0.3 cm (0.1 in)76 years20 of 100 (Routine)
16 April 2026Grand Rapids Forestry Lab, USdaily high max (Tie)26.1 C (79.0 F)tie24 years4 of 100 (Routine)
2 April 2026Grand Rapids Forestry Lab, USdaily rain16.5 mm (0.6 in)0.5 mm (0.02 in)0 years10 of 100 (Routine)
8 March 2026Grand Rapids Forestry Lab, USdaily high min (Tie)1.7 C (35.1 F)tie9 years3 of 100 (Routine)
18 February 2026Grand Rapids Forestry Lab, USdaily rain8.1 mm (0.32 in)0.2 mm (0.01 in)8 years12 of 100 (Routine)
15 February 2026Grand Rapids Forestry Lab, USdaily high max10.0 C (50.0 F)1.7 C (3.1 F)95 years40 of 100 (Notable)
13 February 2026Grand Rapids Forestry Lab, USdaily high max11.1 C (52.0 F)1.1 C (2.0 F)79 years34 of 100 (Routine)
13 December 2025Grand Rapids Forestry Lab, USdaily low max-20.0 C (-4.0 F)2.2 C (4.0 F)103 years43 of 100 (Notable)
25 November 2025Grand Rapids Forestry Lab, USdaily rain11.9 mm (0.5 in)3.0 mm (0.12 in)83 years20 of 100 (Routine)
25 November 2025Grand Rapids Forestry Lab, USdaily snowfall9.1 cm (3.6 in)2.7 cm (1.1 in)0 years13 of 100 (Routine)
24 November 2025Grand Rapids Forestry Lab, USdaily high max11.7 C (53.1 F)0.6 C (1.1 F)19 years15 of 100 (Routine)
4 October 2025Grand Rapids Forestry Lab, USdaily high min17.8 C (64.0 F)3.9 C (7.0 F)88 years43 of 100 (Notable)
4 October 2025Grand Rapids Forestry Lab, USdaily high max30.0 C (86.0 F)1.1 C (2.0 F)103 years41 of 100 (Notable)

Climate Trend

105 complete years, 1916 to 2025
Annual mean temperature at Grand Rapids Forestry Lab as warming stripes, 1916 to 2025 One stripe for each of 105 complete years at Grand Rapids Forestry Lab, 1916 to 2025. Blue stripes are years cooler than the station's own mean of 4.3 C (39.7 F); red stripes are warmer. The coolest year was 1917, at 1.1 C (34.1 F), and the warmest was 2024, at 7.1 C (44.8 F). The strongest colour marks a difference of 3.2 C (5.8 F). 1916: 1.9 C, -2.4 C from the station mean1917: 1.1 C, -3.1 C from the station mean1918: 2.9 C, -1.4 C from the station mean1919: 3.3 C, -1.0 C from the station mean1920: 3.6 C, -0.6 C from the station mean1921: 5.5 C, +1.3 C from the station mean1922: 4.8 C, +0.5 C from the station mean1923: 4.3 C, 0.0 C from the station mean1924: 2.6 C, -1.7 C from the station mean1925: 4.3 C, 0.0 C from the station mean1926: 3.5 C, -0.8 C from the station mean1927: 3.4 C, -0.9 C from the station mean1928: 4.0 C, -0.2 C from the station mean1929: 2.4 C, -1.9 C from the station mean1930: 4.2 C, -0.1 C from the station mean1931: 6.6 C, +2.3 C from the station mean1932: 3.7 C, -0.5 C from the station mean1933: 3.6 C, -0.7 C from the station mean1934: 4.1 C, -0.1 C from the station mean1936: 2.4 C, -1.9 C from the station mean1937: 3.0 C, -1.3 C from the station mean1939: 4.4 C, +0.1 C from the station mean1940: 3.6 C, -0.7 C from the station mean1941: 5.2 C, +0.9 C from the station mean1942: 4.1 C, -0.2 C from the station mean1943: 3.1 C, -1.2 C from the station mean1944: 4.5 C, +0.2 C from the station mean1945: 3.0 C, -1.3 C from the station mean1946: 4.1 C, -0.2 C from the station mean1947: 3.8 C, -0.5 C from the station mean1948: 4.4 C, +0.1 C from the station mean1949: 4.4 C, +0.2 C from the station mean1950: 2.1 C, -2.2 C from the station mean1951: 2.8 C, -1.4 C from the station mean1952: 5.0 C, +0.7 C from the station mean1953: 4.8 C, +0.5 C from the station mean1954: 4.4 C, +0.1 C from the station mean1955: 3.9 C, -0.4 C from the station mean1956: 3.8 C, -0.5 C from the station mean1957: 3.9 C, -0.3 C from the station mean1958: 4.3 C, 0.0 C from the station mean1959: 4.1 C, -0.2 C from the station mean1960: 4.1 C, -0.2 C from the station mean1961: 5.0 C, +0.7 C from the station mean1962: 4.2 C, -0.1 C from the station mean1963: 4.7 C, +0.4 C from the station mean1964: 4.5 C, +0.2 C from the station mean1965: 3.2 C, -1.1 C from the station mean1966: 3.3 C, -1.0 C from the station mean1967: 3.4 C, -0.9 C from the station mean1968: 4.4 C, +0.1 C from the station mean1969: 4.2 C, -0.1 C from the station mean1970: 3.8 C, -0.5 C from the station mean1971: 4.0 C, -0.3 C from the station mean1972: 2.7 C, -1.6 C from the station mean1973: 5.3 C, +1.0 C from the station mean1974: 4.3 C, 0.0 C from the station mean1975: 4.4 C, +0.1 C from the station mean1976: 4.3 C, 0.0 C from the station mean1977: 5.1 C, +0.8 C from the station mean1978: 4.0 C, -0.3 C from the station mean1979: 3.4 C, -0.9 C from the station mean1980: 4.7 C, +0.4 C from the station mean1981: 5.9 C, +1.6 C from the station mean1982: 4.0 C, -0.3 C from the station mean1983: 4.5 C, +0.2 C from the station mean1984: 4.5 C, +0.2 C from the station mean1985: 2.9 C, -1.4 C from the station mean1986: 4.3 C, 0.0 C from the station mean1987: 6.6 C, +2.3 C from the station mean1988: 4.2 C, -0.1 C from the station mean1989: 2.8 C, -1.5 C from the station mean1990: 4.6 C, +0.3 C from the station mean1991: 4.7 C, +0.4 C from the station mean1992: 4.1 C, -0.2 C from the station mean1993: 3.5 C, -0.8 C from the station mean1994: 4.4 C, +0.1 C from the station mean1995: 3.9 C, -0.4 C from the station mean1996: 2.4 C, -1.9 C from the station mean1997: 4.7 C, +0.4 C from the station mean1998: 7.0 C, +2.7 C from the station mean1999: 6.3 C, +2.0 C from the station mean2000: 4.9 C, +0.6 C from the station mean2001: 5.9 C, +1.6 C from the station mean2002: 5.1 C, +0.8 C from the station mean2003: 5.1 C, +0.8 C from the station mean2004: 4.5 C, +0.2 C from the station mean2005: 5.6 C, +1.3 C from the station mean2006: 6.9 C, +2.6 C from the station mean2007: 5.4 C, +1.1 C from the station mean2009: 4.2 C, -0.1 C from the station mean2010: 5.8 C, +1.5 C from the station mean2011: 5.1 C, +0.8 C from the station mean2012: 6.3 C, +2.0 C from the station mean2013: 3.4 C, -0.9 C from the station mean2014: 2.7 C, -1.6 C from the station mean2015: 5.5 C, +1.2 C from the station mean2016: 6.1 C, +1.9 C from the station mean2017: 5.0 C, +0.7 C from the station mean2019: 3.6 C, -0.7 C from the station mean2020: 5.2 C, +0.9 C from the station mean2021: 6.5 C, +2.2 C from the station mean2022: 3.6 C, -0.7 C from the station mean2024: 7.1 C, +2.8 C from the station mean2025: 5.6 C, +1.3 C from the station mean19161930194019501960197019801990200020102020
One stripe for each of 105 complete years at Grand Rapids Forestry Lab, 1916 to 2025. Blue stripes are years cooler than the station's own mean of 4.3 C (39.7 F); red stripes are warmer. The coolest year was 1917, at 1.1 C (34.1 F), and the warmest was 2024, at 7.1 C (44.8 F). The strongest colour marks a difference of 3.2 C (5.8 F).
Annual mean temperature at Grand Rapids Forestry Lab as warming stripes, 1916 to 2025
YearAnnual mean temperatureDifference from the station mean
19161.9 C-2.36 C
19171.1 C-3.15 C
19182.9 C-1.37 C
19193.3 C-0.99 C
19203.6 C-0.65 C
19215.5 C+1.25 C
19224.8 C+0.51 C
19234.3 C+0.00 C
19242.6 C-1.68 C
19254.3 C-0.04 C
19263.5 C-0.80 C
19273.4 C-0.93 C
19284.0 C-0.25 C
19292.4 C-1.90 C
19304.2 C-0.09 C
19316.6 C+2.30 C
19323.7 C-0.55 C
19333.6 C-0.67 C
19344.1 C-0.15 C
19362.4 C-1.86 C
19373.0 C-1.27 C
19394.4 C+0.10 C
19403.6 C-0.72 C
19415.2 C+0.92 C
19424.1 C-0.17 C
19433.1 C-1.16 C
19444.5 C+0.22 C
19453.0 C-1.30 C
19464.1 C-0.23 C
19473.8 C-0.53 C
19484.4 C+0.10 C
19494.4 C+0.15 C
19502.1 C-2.18 C
19512.8 C-1.45 C
19525.0 C+0.66 C
19534.8 C+0.52 C
19544.4 C+0.10 C
19553.9 C-0.40 C
19563.8 C-0.51 C
19573.9 C-0.35 C
19584.3 C-0.02 C
19594.1 C-0.24 C
19604.1 C-0.22 C
19615.0 C+0.74 C
19624.2 C-0.14 C
19634.7 C+0.42 C
19644.5 C+0.16 C
19653.2 C-1.12 C
19663.3 C-1.02 C
19673.4 C-0.93 C
19684.4 C+0.09 C
19694.2 C-0.13 C
19703.8 C-0.47 C
19714.0 C-0.31 C
19722.7 C-1.58 C
19735.3 C+1.02 C
19744.3 C-0.01 C
19754.4 C+0.09 C
19764.3 C+0.04 C
19775.1 C+0.77 C
19784.0 C-0.31 C
19793.4 C-0.91 C
19804.7 C+0.41 C
19815.9 C+1.61 C
19824.0 C-0.33 C
19834.5 C+0.22 C
19844.5 C+0.17 C
19852.9 C-1.36 C
19864.3 C+0.02 C
19876.6 C+2.27 C
19884.2 C-0.10 C
19892.8 C-1.48 C
19904.6 C+0.28 C
19914.7 C+0.43 C
19924.1 C-0.17 C
19933.5 C-0.83 C
19944.4 C+0.12 C
19953.9 C-0.39 C
19962.4 C-1.87 C
19974.7 C+0.39 C
19987.0 C+2.71 C
19996.3 C+2.02 C
20004.9 C+0.59 C
20015.9 C+1.64 C
20025.1 C+0.82 C
20035.1 C+0.76 C
20044.5 C+0.22 C
20055.6 C+1.31 C
20066.9 C+2.59 C
20075.4 C+1.09 C
20094.2 C-0.08 C
20105.8 C+1.52 C
20115.1 C+0.76 C
20126.3 C+2.02 C
20133.4 C-0.94 C
20142.7 C-1.57 C
20155.5 C+1.24 C
20166.1 C+1.85 C
20175.0 C+0.71 C
20193.6 C-0.72 C
20205.2 C+0.93 C
20216.5 C+2.16 C
20223.6 C-0.67 C
20247.1 C+2.84 C
20255.6 C+1.33 C

The annual mean temperature here has risen by 0.2 C (0.1 to 0.2) per decade over 1916 to 2025. In Fahrenheit: 0.3 F (0.2 to 0.4) per decade. The slope is a straight line fitted to 105 complete years; the brackets give its 95 percent interval.

Fitted temperature trends per decade at Grand Rapids Forestry Lab
MeasurePer decade (C)Per decade (F)PeriodComplete yearsReading
Annual mean temperature0.2 C (0.1 to 0.2) per decade0.3 F (0.2 to 0.4) per decade1916 to 2025105Rise
Mean daily maximum0.08 C (0.01 to 0.14) per decade0.14 F (0.02 to 0.26) per decade1916 to 2025105Rise
Mean daily minimum0.3 C (0.2 to 0.3) per decade0.5 F (0.4 to 0.6) per decade1916 to 2025105Rise

A year is complete when all 12 months have at least 20 days of both daily maximum and daily minimum readings. The annual mean is the mean of the monthly means. The trend describes this one station over this period; it does not say what caused the change.

Extremes by Year

1915 to 2026
Yearly extremes at Grand Rapids Forestry Lab: the record and the median year
MeasureRecordYear of the recordMedian yearYears with a value
Hottest day (TXx)40.0 C (104.0 F)193633.9 C (93.0 F)112
Coldest night (TNn)-46.1 C (-51.0 F)1927-36.7 C (-34.1 F)112
Wettest day (Rx1day)121.4 mm (4.8 in)201250.4 mm (2.0 in)112
Wettest five days (Rx5day)163.9 mm (6.5 in)197377.8 mm (3.1 in)112
Longest dry spell (CDD)52 days192623 days112

Hottest day (TXx)

Hottest day (TXx) at Grand Rapids Forestry Lab by year The hottest day of the year at Grand Rapids Forestry Lab, 1915 to 2026. The record is 40.0 C (104.0 F) in 1936, marked on the chart; the median year is 33.9 C (93.0 F). 3032.53537.540192019401960198020002020Record: 40.0 C (104.0 F) in 1936
The hottest day of the year at Grand Rapids Forestry Lab, 1915 to 2026. The record is 40.0 C (104.0 F) in 1936, marked on the chart; the median year is 33.9 C (93.0 F).
Hottest day (TXx) at Grand Rapids Forestry Lab by year
YearHottest day (TXx)
191532.2 C (90.0 F)
191636.1 C (97.0 F)
191738.9 C (102.0 F)
191836.7 C (98.1 F)
191936.1 C (97.0 F)
192033.3 C (91.9 F)
192137.8 C (100.0 F)
192235.6 C (96.1 F)
192336.1 C (97.0 F)
192432.2 C (90.0 F)
192535.0 C (95.0 F)
192636.7 C (98.1 F)
192732.2 C (90.0 F)
192832.2 C (90.0 F)
192937.8 C (100.0 F)
193036.7 C (98.1 F)
193137.2 C (99.0 F)
193235.0 C (95.0 F)
193337.8 C (100.0 F)
193438.3 C (100.9 F)
193534.4 C (93.9 F)
193640.0 C (104.0 F)
193734.4 C (93.9 F)
193834.4 C (93.9 F)
193935.0 C (95.0 F)
194035.0 C (95.0 F)
194135.6 C (96.1 F)
194232.2 C (90.0 F)
194332.2 C (90.0 F)
194432.2 C (90.0 F)
194533.3 C (91.9 F)
194631.7 C (89.1 F)
194737.2 C (99.0 F)
194835.0 C (95.0 F)
194932.8 C (91.0 F)
195030.6 C (87.1 F)
195131.7 C (89.1 F)
195233.3 C (91.9 F)
195331.7 C (89.1 F)
195432.2 C (90.0 F)
195533.3 C (91.9 F)
195634.4 C (93.9 F)
195733.3 C (91.9 F)
195833.3 C (91.9 F)
195933.3 C (91.9 F)
196031.7 C (89.1 F)
196133.9 C (93.0 F)
196230.6 C (87.1 F)
196331.1 C (88.0 F)
196433.3 C (91.9 F)
196532.2 C (90.0 F)
196632.8 C (91.0 F)
196731.7 C (89.1 F)
196831.1 C (88.0 F)
196932.8 C (91.0 F)
197033.3 C (91.9 F)
197132.8 C (91.0 F)
197232.2 C (90.0 F)
197332.8 C (91.0 F)
197434.4 C (93.9 F)
197535.0 C (95.0 F)
197637.8 C (100.0 F)
197733.3 C (91.9 F)
197833.3 C (91.9 F)
197931.7 C (89.1 F)
198036.1 C (97.0 F)
198133.3 C (91.9 F)
198233.9 C (93.0 F)
198335.0 C (95.0 F)
198437.2 C (99.0 F)
198532.2 C (90.0 F)
198632.2 C (90.0 F)
198735.0 C (95.0 F)
198837.8 C (100.0 F)
198933.9 C (93.0 F)
199035.6 C (96.1 F)
199134.4 C (93.9 F)
199232.2 C (90.0 F)
199332.8 C (91.0 F)
199432.8 C (91.0 F)
199535.6 C (96.1 F)
199633.3 C (91.9 F)
199732.8 C (91.0 F)
199833.9 C (93.0 F)
199933.3 C (91.9 F)
200032.8 C (91.0 F)
200136.1 C (97.0 F)
200234.4 C (93.9 F)
200335.0 C (95.0 F)
200433.9 C (93.0 F)
200535.6 C (96.1 F)
200637.8 C (100.0 F)
200734.4 C (93.9 F)
200832.8 C (91.0 F)
200931.7 C (89.1 F)
201032.8 C (91.0 F)
201135.0 C (95.0 F)
201234.4 C (93.9 F)
201334.4 C (93.9 F)
201433.3 C (91.9 F)
201534.4 C (93.9 F)
201632.8 C (91.0 F)
201733.3 C (91.9 F)
201833.3 C (91.9 F)
201932.8 C (91.0 F)
202035.0 C (95.0 F)
202137.2 C (99.0 F)
202234.4 C (93.9 F)
202333.9 C (93.0 F)
202433.9 C (93.0 F)
202534.4 C (93.9 F)
202635.6 C (96.1 F)

Coldest night (TNn)

Coldest night (TNn) at Grand Rapids Forestry Lab by year The coldest night of the year at Grand Rapids Forestry Lab, 1915 to 2026. The record is -46.1 C (-51.0 F) in 1927, marked on the chart; the median year is -36.7 C (-34.1 F). -50-45-40-35-30-25192019401960198020002020Record: -46.1 C (-51.0 F) in 1927
The coldest night of the year at Grand Rapids Forestry Lab, 1915 to 2026. The record is -46.1 C (-51.0 F) in 1927, marked on the chart; the median year is -36.7 C (-34.1 F).
Coldest night (TNn) at Grand Rapids Forestry Lab by year
YearColdest night (TNn)
1915-26.1 C (-15.0 F)
1916-43.3 C (-45.9 F)
1917-40.0 C (-40.0 F)
1918-40.0 C (-40.0 F)
1919-38.9 C (-38.0 F)
1920-38.9 C (-38.0 F)
1921-38.9 C (-38.0 F)
1922-42.2 C (-44.0 F)
1923-38.9 C (-38.0 F)
1924-41.1 C (-42.0 F)
1925-36.1 C (-33.0 F)
1926-35.0 C (-31.0 F)
1927-46.1 C (-51.0 F)
1928-36.7 C (-34.1 F)
1929-39.4 C (-38.9 F)
1930-38.9 C (-38.0 F)
1931-31.7 C (-25.1 F)
1932-33.3 C (-27.9 F)
1933-42.2 C (-44.0 F)
1934-35.6 C (-32.1 F)
1935-41.1 C (-42.0 F)
1936-41.7 C (-43.1 F)
1937-42.8 C (-45.0 F)
1938-40.6 C (-41.1 F)
1939-42.8 C (-45.0 F)
1940-40.0 C (-40.0 F)
1941-32.2 C (-26.0 F)
1942-36.7 C (-34.1 F)
1943-36.1 C (-33.0 F)
1944-35.0 C (-31.0 F)
1945-38.3 C (-36.9 F)
1946-42.8 C (-45.0 F)
1947-36.7 C (-34.1 F)
1948-41.1 C (-42.0 F)
1949-35.6 C (-32.1 F)
1950-42.2 C (-44.0 F)
1951-40.6 C (-41.1 F)
1952-35.6 C (-32.1 F)
1953-36.7 C (-34.1 F)
1954-40.0 C (-40.0 F)
1955-40.6 C (-41.1 F)
1956-33.9 C (-29.0 F)
1957-34.4 C (-29.9 F)
1958-34.4 C (-29.9 F)
1959-38.3 C (-36.9 F)
1960-33.9 C (-29.0 F)
1961-35.0 C (-31.0 F)
1962-39.4 C (-38.9 F)
1963-38.3 C (-36.9 F)
1964-32.2 C (-26.0 F)
1965-41.1 C (-42.0 F)
1966-38.9 C (-38.0 F)
1967-40.6 C (-41.1 F)
1968-38.3 C (-36.9 F)
1969-31.7 C (-25.1 F)
1970-37.2 C (-35.0 F)
1971-35.6 C (-32.1 F)
1972-41.7 C (-43.1 F)
1973-38.9 C (-38.0 F)
1974-35.6 C (-32.1 F)
1975-34.4 C (-29.9 F)
1976-36.7 C (-34.1 F)
1977-38.9 C (-38.0 F)
1978-36.1 C (-33.0 F)
1979-38.9 C (-38.0 F)
1980-32.8 C (-27.0 F)
1981-36.1 C (-33.0 F)
1982-38.9 C (-38.0 F)
1983-40.0 C (-40.0 F)
1984-35.6 C (-32.1 F)
1985-36.7 C (-34.1 F)
1986-35.0 C (-31.0 F)
1987-37.2 C (-35.0 F)
1988-36.7 C (-34.1 F)
1989-36.7 C (-34.1 F)
1990-35.6 C (-32.1 F)
1991-33.3 C (-27.9 F)
1992-35.0 C (-31.0 F)
1993-36.7 C (-34.1 F)
1994-37.2 C (-35.0 F)
1995-31.1 C (-24.0 F)
1996-40.6 C (-41.1 F)
1997-37.8 C (-36.0 F)
1998-31.7 C (-25.1 F)
1999-32.8 C (-27.0 F)
2000-30.0 C (-22.0 F)
2001-30.6 C (-23.1 F)
2002-26.1 C (-15.0 F)
2003-30.6 C (-23.1 F)
2004-36.7 C (-34.1 F)
2005-40.0 C (-40.0 F)
2006-29.4 C (-20.9 F)
2007-32.8 C (-27.0 F)
2008-33.3 C (-27.9 F)
2009-35.0 C (-31.0 F)
2010-33.9 C (-29.0 F)
2011-37.2 C (-35.0 F)
2012-29.4 C (-20.9 F)
2013-32.8 C (-27.0 F)
2014-35.6 C (-32.1 F)
2015-32.8 C (-27.0 F)
2016-32.8 C (-27.0 F)
2017-35.0 C (-31.0 F)
2018-33.9 C (-29.0 F)
2019-41.1 C (-42.0 F)
2020-32.2 C (-26.0 F)
2021-37.8 C (-36.0 F)
2022-35.0 C (-31.0 F)
2023-30.6 C (-23.1 F)
2024-28.9 C (-20.0 F)
2025-33.9 C (-29.0 F)
2026-35.0 C (-31.0 F)

Wettest day (Rx1day)

Wettest day (Rx1day) at Grand Rapids Forestry Lab by year The wettest day of the year at Grand Rapids Forestry Lab, 1915 to 2026. The record is 121.4 mm (4.8 in) in 2012, marked on the chart; the median year is 50.4 mm (2.0 in). 050100150192019401960198020002020Record: 121.4 mm (4.8 in) in 2012
The wettest day of the year at Grand Rapids Forestry Lab, 1915 to 2026. The record is 121.4 mm (4.8 in) in 2012, marked on the chart; the median year is 50.4 mm (2.0 in).
Wettest day (Rx1day) at Grand Rapids Forestry Lab by year
YearWettest day (Rx1day)
191551.1 mm (2.0 in)
191631.2 mm (1.2 in)
191715.5 mm (0.6 in)
191845.7 mm (1.8 in)
191950.8 mm (2.0 in)
192052.1 mm (2.1 in)
192162.2 mm (2.4 in)
192243.2 mm (1.7 in)
192331.2 mm (1.2 in)
192449.3 mm (1.9 in)
192538.4 mm (1.5 in)
192648.0 mm (1.9 in)
192737.8 mm (1.5 in)
192852.1 mm (2.1 in)
192929.5 mm (1.2 in)
193039.1 mm (1.5 in)
193141.1 mm (1.6 in)
193252.8 mm (2.1 in)
193328.7 mm (1.1 in)
193468.6 mm (2.7 in)
193538.4 mm (1.5 in)
193638.1 mm (1.5 in)
1937100.1 mm (3.9 in)
193853.3 mm (2.1 in)
193943.9 mm (1.7 in)
194048.8 mm (1.9 in)
194150.0 mm (2.0 in)
194233.8 mm (1.3 in)
194362.7 mm (2.5 in)
194476.7 mm (3.0 in)
194560.5 mm (2.4 in)
194670.1 mm (2.8 in)
194788.4 mm (3.5 in)
194839.1 mm (1.5 in)
194956.9 mm (2.2 in)
195068.6 mm (2.7 in)
195167.3 mm (2.6 in)
195255.9 mm (2.2 in)
195397.8 mm (3.9 in)
195424.9 mm (1.0 in)
195579.8 mm (3.1 in)
195648.3 mm (1.9 in)
195739.6 mm (1.6 in)
195854.6 mm (2.1 in)
195960.7 mm (2.4 in)
196076.2 mm (3.0 in)
196155.9 mm (2.2 in)
196243.9 mm (1.7 in)
196340.6 mm (1.6 in)
196470.6 mm (2.8 in)
196563.5 mm (2.5 in)
196639.4 mm (1.6 in)
196729.7 mm (1.2 in)
196838.1 mm (1.5 in)
196949.5 mm (1.9 in)
197035.6 mm (1.4 in)
197185.3 mm (3.4 in)
197244.5 mm (1.8 in)
1973112.8 mm (4.4 in)
197481.8 mm (3.2 in)
197535.6 mm (1.4 in)
197647.8 mm (1.9 in)
197749.5 mm (1.9 in)
1978105.7 mm (4.2 in)
197967.6 mm (2.7 in)
198064.5 mm (2.5 in)
198147.2 mm (1.9 in)
198241.9 mm (1.6 in)
1983111.0 mm (4.4 in)
198445.5 mm (1.8 in)
198552.6 mm (2.1 in)
198643.9 mm (1.7 in)
198776.5 mm (3.0 in)
198877.2 mm (3.0 in)
198957.9 mm (2.3 in)
199040.4 mm (1.6 in)
199128.7 mm (1.1 in)
199269.3 mm (2.7 in)
199349.3 mm (1.9 in)
199475.4 mm (3.0 in)
199568.3 mm (2.7 in)
199648.5 mm (1.9 in)
199751.1 mm (2.0 in)
199841.9 mm (1.6 in)
199959.7 mm (2.4 in)
200041.4 mm (1.6 in)
200142.7 mm (1.7 in)
2002114.3 mm (4.5 in)
200335.1 mm (1.4 in)
200486.4 mm (3.4 in)
200561.5 mm (2.4 in)
200646.0 mm (1.8 in)
200752.1 mm (2.1 in)
200848.0 mm (1.9 in)
200969.1 mm (2.7 in)
201046.7 mm (1.8 in)
201142.4 mm (1.7 in)
2012121.4 mm (4.8 in)
201330.2 mm (1.2 in)
201454.4 mm (2.1 in)
201543.2 mm (1.7 in)
201668.8 mm (2.7 in)
201738.9 mm (1.5 in)
201843.9 mm (1.7 in)
201969.1 mm (2.7 in)
2020105.9 mm (4.2 in)
202178.7 mm (3.1 in)
202278.0 mm (3.1 in)
202331.5 mm (1.2 in)
202498.3 mm (3.9 in)
202545.7 mm (1.8 in)
202662.7 mm (2.5 in)

Wettest five days (Rx5day)

Wettest five days (Rx5day) at Grand Rapids Forestry Lab by year The wettest five days of the year at Grand Rapids Forestry Lab, 1915 to 2026. The record is 163.9 mm (6.5 in) in 1973, marked on the chart; the median year is 77.8 mm (3.1 in). 050100150200192019401960198020002020Record: 163.9 mm (6.5 in) in 1973
The wettest five days of the year at Grand Rapids Forestry Lab, 1915 to 2026. The record is 163.9 mm (6.5 in) in 1973, marked on the chart; the median year is 77.8 mm (3.1 in).
Wettest five days (Rx5day) at Grand Rapids Forestry Lab by year
YearWettest five days (Rx5day)
191569.1 mm (2.7 in)
191655.9 mm (2.2 in)
191726.5 mm (1.0 in)
191850.8 mm (2.0 in)
191976.2 mm (3.0 in)
192064.0 mm (2.5 in)
1921100.8 mm (4.0 in)
192258.1 mm (2.3 in)
192356.6 mm (2.2 in)
192449.8 mm (2.0 in)
192580.0 mm (3.1 in)
192657.9 mm (2.3 in)
192749.0 mm (1.9 in)
192876.7 mm (3.0 in)
192935.3 mm (1.4 in)
193062.5 mm (2.5 in)
1931116.5 mm (4.6 in)
193299.0 mm (3.9 in)
193361.5 mm (2.4 in)
193477.5 mm (3.1 in)
193562.2 mm (2.4 in)
193651.4 mm (2.0 in)
1937146.2 mm (5.8 in)
1938105.7 mm (4.2 in)
193970.1 mm (2.8 in)
194054.4 mm (2.1 in)
194169.3 mm (2.7 in)
194264.0 mm (2.5 in)
194382.8 mm (3.3 in)
194482.8 mm (3.3 in)
194563.3 mm (2.5 in)
194677.5 mm (3.1 in)
1947101.6 mm (4.0 in)
194850.8 mm (2.0 in)
1949114.6 mm (4.5 in)
195069.1 mm (2.7 in)
195175.4 mm (3.0 in)
195287.7 mm (3.5 in)
1953155.7 mm (6.1 in)
195440.4 mm (1.6 in)
195581.4 mm (3.2 in)
195680.1 mm (3.2 in)
195778.0 mm (3.1 in)
195859.4 mm (2.3 in)
195981.4 mm (3.2 in)
196078.7 mm (3.1 in)
1961113.8 mm (4.5 in)
196276.4 mm (3.0 in)
196381.2 mm (3.2 in)
196488.7 mm (3.5 in)
196583.1 mm (3.3 in)
196692.2 mm (3.6 in)
196739.7 mm (1.6 in)
196859.0 mm (2.3 in)
196968.9 mm (2.7 in)
197078.3 mm (3.1 in)
1971114.5 mm (4.5 in)
197255.4 mm (2.2 in)
1973163.9 mm (6.5 in)
197490.9 mm (3.6 in)
197568.1 mm (2.7 in)
197699.9 mm (3.9 in)
197798.3 mm (3.9 in)
1978136.2 mm (5.4 in)
197981.8 mm (3.2 in)
198097.8 mm (3.9 in)
198164.5 mm (2.5 in)
198256.9 mm (2.2 in)
1983146.6 mm (5.8 in)
1984115.8 mm (4.6 in)
1985104.9 mm (4.1 in)
198662.4 mm (2.5 in)
1987144.1 mm (5.7 in)
1988148.6 mm (5.9 in)
198987.7 mm (3.5 in)
199065.2 mm (2.6 in)
199151.8 mm (2.0 in)
199293.0 mm (3.7 in)
199370.7 mm (2.8 in)
1994130.0 mm (5.1 in)
1995117.0 mm (4.6 in)
199677.5 mm (3.1 in)
199774.2 mm (2.9 in)
199883.1 mm (3.3 in)
1999109.0 mm (4.3 in)
200057.4 mm (2.3 in)
200183.9 mm (3.3 in)
2002139.0 mm (5.5 in)
200347.2 mm (1.9 in)
200494.0 mm (3.7 in)
200578.0 mm (3.1 in)
200658.4 mm (2.3 in)
200763.0 mm (2.5 in)
200863.6 mm (2.5 in)
200979.8 mm (3.1 in)
201069.2 mm (2.7 in)
201163.2 mm (2.5 in)
2012153.5 mm (6.0 in)
201355.4 mm (2.2 in)
201492.7 mm (3.6 in)
201570.2 mm (2.8 in)
201696.5 mm (3.8 in)
201772.9 mm (2.9 in)
201859.2 mm (2.3 in)
201991.5 mm (3.6 in)
2020106.7 mm (4.2 in)
202184.8 mm (3.3 in)
202287.1 mm (3.4 in)
202348.5 mm (1.9 in)
2024100.6 mm (4.0 in)
202556.9 mm (2.2 in)
2026130.5 mm (5.1 in)

Longest dry spell (CDD)

Longest dry spell (CDD) at Grand Rapids Forestry Lab by year The longest dry spell of the year at Grand Rapids Forestry Lab, 1915 to 2026. The record is 52 days in 1926, marked on the chart; the median year is 23 days. 102030405060192019401960198020002020Record: 52 days in 1926
The longest dry spell of the year at Grand Rapids Forestry Lab, 1915 to 2026. The record is 52 days in 1926, marked on the chart; the median year is 23 days.
Longest dry spell (CDD) at Grand Rapids Forestry Lab by year
YearLongest dry spell (CDD)
191521 days
191616 days
191730 days
191840 days
191922 days
192022 days
192128 days
192218 days
192317 days
192425 days
192529 days
192652 days
192726 days
192828 days
192924 days
193034 days
193133 days
193222 days
193332 days
193427 days
193533 days
193626 days
193722 days
193823 days
193925 days
194021 days
194131 days
194219 days
194327 days
194427 days
194517 days
194621 days
194724 days
194829 days
194921 days
195027 days
195122 days
195223 days
195324 days
195421 days
195515 days
195619 days
195720 days
195843 days
195927 days
196025 days
196125 days
196226 days
196331 days
196430 days
196522 days
196621 days
196723 days
196835 days
196926 days
197024 days
197116 days
197221 days
197331 days
197425 days
197519 days
197640 days
197715 days
197820 days
197918 days
198030 days
198131 days
198223 days
198319 days
198441 days
198515 days
198625 days
198723 days
198835 days
198918 days
199036 days
199120 days
199226 days
199325 days
199423 days
199521 days
199612 days
199722 days
199821 days
199941 days
200012 days
200125 days
200224 days
200324 days
200416 days
200515 days
200617 days
200728 days
200816 days
200924 days
201022 days
201118 days
201224 days
201312 days
201417 days
201519 days
201621 days
201725 days
201828 days
201921 days
202020 days
202121 days
202217 days
202315 days
202443 days
202523 days
202620 days

Each chart shows one value per year; the dot marks the record year. TXx is the hottest daily maximum, TNn the coldest daily minimum, Rx1day and Rx5day the largest one-day and five-day rain totals, and CDD the longest run of days with less than 1 mm of rain. A year with missing days can understate an extreme.

Frost Dates and Growing Season

105 years with a frost

Across 105 years with a frost, the median last spring frost at Grand Rapids Forestry Lab falls on 22 May and the median first autumn frost on 18 September, which leaves a median of 118 days between them.

In 1993 to 2025 the median growing season was 135 days. That is 38 days more than in 1916 to 1947.

Fitted over all years, the growing season changes by +4.6 days per decade at this station.

Frost dates and growing season at Grand Rapids Forestry Lab
MeasureMedian, all yearsEarliest period (1916 to 1947)Recent period (1993 to 2025)Recent against earliestFitted trend
Last spring frost22 May4 June15 May20 days earlier-2.1 days per decade
First autumn frost18 September7 September26 September19 days later+2.5 days per decade
Growing days118 days97 days135 days38 days more+4.6 days per decade

A frost day is a day with a daily minimum at or below 0 C (32 F). The last spring frost and the first autumn frost are the last and first such days of the cold season, and growing days are the days between them. A negative trend for the last spring frost means it comes earlier.

Rainfall Return Levels

109 years, 1916 to 2025

A day with at least 52.0 mm (2.0 in) of rain is expected about once in 2 years. A day with at least 132.5 mm (5.2 in) of rain is expected about once in 100 years.

Rainfall return levels at Grand Rapids Forestry Lab: the daily rain expected about once in a given number of years
Expected about once inA day with at leastNote
2 years52.0 mm (2.0 in)
5 years71.0 mm (2.8 in)
10 years84.5 mm (3.3 in)
25 years102.8 mm (4.0 in)
50 years117.3 mm (4.6 in)
100 years132.5 mm (5.2 in)

The levels come from a generalised extreme value (GEV) distribution fitted by L-moments to the wettest-day total of each year, 109 years of values from 1916 to 2025.

A return level is an estimate. It is least reliable for the long periods, 50 and 100 years, and for any period longer than the record behind the fit, where the fit has to reach past the largest day actually observed. It is not a forecast.

The largest wettest-day totals in the fit: 121.4 mm (4.8 in) in 2012; 114.3 mm (4.5 in) in 2002; 112.8 mm (4.4 in) in 1973.

Station Changes

2 suspected

2 changes were suspected in the annual mean temperature of Grand Rapids Forestry Lab, at 1974 and 1983. Each is measured against neighbouring stations.

  • Relative to 5 neighbouring stations, the station's annual mean temperature from 1974 ran 0.5 C (0.8 F) higher than in the years before (likely change).
  • Relative to 5 neighbouring stations, the station's annual mean temperature from 1983 ran 0.6 C (1.2 F) lower than in the years before (likely change).
Suspected changes in the annual mean temperature at Grand Rapids Forestry Lab, against neighbouring stations
YearShift (C)Shift (F)StrengthNeighbours
1974+0.5+0.8likely5
1983-0.6-1.2likely5

Possible change at the station (a move, a new instrument or a new site); the record is kept as measured. A "likely" change has a larger test statistic than a "possible" one. Neither says why the station differs from its neighbours. How changes are found, and the largest ones.

Climate Twins

2009 to 2025 against 1961 to 1990

Over 2009 to 2025, Grand Rapids Forestry Lab had a mean temperature of 5.1 C (41.1 F) and 747.7 mm (29.4 in) of rain a year. The 3 stations whose 1961 to 1990 climate was closest to that are Solon Springs (United States, 161 km away), Milaca (United States, 166 km away) and Danbury (United States, 162 km away).

Climate twins of Grand Rapids Forestry Lab: stations whose 1961 to 1990 climate is closest to its 2009 to 2025 climate
Twin stationCountryDistance awayMean temperature, 1961-1990Rain a year, 1961-1990Climate difference
Solon SpringsUnited States161 km (100 mi)4.9 C (40.8 F)727.8 mm (28.7 in)0.63
MilacaUnited States166 km (103 mi)5.3 C (41.5 F)733.2 mm (28.9 in)0.64
DanburyUnited States162 km (101 mi)5.2 C (41.4 F)771.7 mm (30.4 in)0.69

Twins are stations, not cities. A twin is one of the three stations at least 100 km away whose earlier climate is closest to this station's recent one, so a close match does not mean the two places look alike in other ways. A station move or a gap in a record can change that station's averages. The list describes past climate; it is not a forecast and does not say what caused any change. How twins are found, and a search for any station.

Download the Data

  • Data for Grand Rapids Forestry Lab standing records by year: CSV or JSON. Field meanings are on the data page.
  • Data for Grand Rapids Forestry Lab threshold days by year: CSV or JSON. Field meanings are on the data page.

Source: NOAA National Centers for Environmental Information, Global Historical Climatology Network Daily (GHCN-Daily). Records are computed by World Extreme Weather Monitor and are not official NOAA products. (US Government open data (NOAA NCEI)) Data as of 2026-10-13 (13 October 2026). Records are computed by this site and are not official.

Data as of . Last revised (2026-10-13).