Built 2026-10-18 (18 October 2026)

Tupper Lake Sunmount Weather Records (USC00308631)

Record envelope, standing records and threshold days for Tupper Lake Sunmount (USC00308631), New York, United States, with 128 years of record.

Key Facts for Tupper Lake Sunmount

  • Tupper Lake Sunmount (USC00308631) is a weather station in New York, United States at 44.23 latitude and -74.44 longitude, 512 m (1,680 ft) above sea level.
  • The station reports from 1899 to 2026, 128 years of record.
  • 1,464 records set at Tupper Lake Sunmount still stand.
  • Records are tracked for tmax, tmin, prcp, snow, snwd: an element needs 30 years of data to be eligible.
  • Tupper Lake Sunmount set a daily record precipitation of 50.8 mm (2.0 in) on 14 October 2026 (provisional).

Provisional Records

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

About the Station

  • Location: New York, United States, 44.23 latitude, -74.44 longitude.
  • Elevation: 512 m (1,680 ft).
  • Period of record: 1899 to 2026, 128 years.
  • Eligible elements: tmax, tmin, prcp, snow, snwd.

Daily Record Envelope and 2026

2 days at or beyond a record
Daily record high and record low at Tupper Lake Sunmount, with 2026 drawn through them The band shows the record high and record low for each calendar day at Tupper Lake Sunmount. The lines show the 2026 daily maximum and minimum. 2 days in 2026 matched or passed a record. Temperatures are in degrees Celsius. -40-2002040 JanFebMarAprMayJunJulAugSepOctNovDec
The band shows the record high and record low for each calendar day at Tupper Lake Sunmount. The lines show the 2026 daily maximum and minimum. 2 days in 2026 matched or passed a record. Temperatures are in degrees Celsius.
Daily record high and record low at Tupper Lake Sunmount, with 2026 drawn through them
MonthHighest record highLowest record low2026 highest maximum2026 lowest minimum
Jan17.2 C (63.0 F)-38.9 C (-38.0 F)7.8 C (46.0 F)-31.1 C (-24.0 F)
Feb19.4 C (66.9 F)-40.0 C (-40.0 F)3.3 C (37.9 F)-31.1 C (-24.0 F)
Mar28.3 C (82.9 F)-36.1 C (-33.0 F)17.2 C (63.0 F)-26.7 C (-16.1 F)
Apr30.0 C (86.0 F)-22.2 C (-8.0 F)22.2 C (72.0 F)-13.3 C (8.1 F)
May33.3 C (91.9 F)-12.8 C (9.0 F)30.0 C (86.0 F)-1.7 C (28.9 F)
Jun36.1 C (97.0 F)-5.0 C (23.0 F)30.0 C (86.0 F)2.8 C (37.0 F)
Jul36.7 C (98.1 F)-1.1 C (30.0 F)32.8 C (91.0 F)7.8 C (46.0 F)
Aug36.7 C (98.1 F)-1.1 C (30.0 F)28.9 C (84.0 F)7.8 C (46.0 F)
Sep34.4 C (93.9 F)-7.2 C (19.0 F)25.0 C (77.0 F)0.0 C (32.0 F)
Oct29.4 C (84.9 F)-13.3 C (8.1 F)21.1 C (70.0 F)-1.7 C (28.9 F)
Nov25.6 C (78.1 F)-26.7 C (-16.1 F)n/an/a
Dec18.3 C (64.9 F)-38.9 C (-38.0 F)n/an/a

Which Years Hold Standing Records

1,464 standing records
Standing records at Tupper Lake Sunmount by the year they were set 1,464 records at Tupper Lake Sunmount still stand. 1926 holds the most, with 44. 02040601899: 151900: 121901: 241902: 261903: 261904: 81905: 101906: 131907: 91908: 71909: 51910: 161911: 191912: 171913: 161925: 211926: 441927: 101928: 111929: 171930: 131931: 171932: 51933: 171934: 181935: 41936: 141937: 161938: 281939: 191940: 241941: 121942: 121943: 131944: 101945: 231946: 121947: 181948: 41949: 141950: 181951: 141952: 91953: 171954: 111955: 101956: 91957: 191958: 91959: 141960: 71961: 101962: 101963: 111964: 201965: 171966: 181967: 91968: 181969: 91970: 91971: 121972: 111973: 181974: 101975: 121976: 221977: 151978: 111979: 271980: 111981: 231982: 181983: 151984: 71985: 41986: 71987: 111988: 171989: 161990: 201991: 111992: 141993: 91994: 51995: 61996: 61997: 41998: 81999: 42000: 112001: 142002: 132003: 62004: 62005: 102006: 72007: 142008: 152009: 32010: 82014: 42015: 92016: 112017: 182018: 182019: 102020: 142021: 72022: 62023: 32024: 82025: 32026: 51899191119341946195819701982199420062021
1,464 records at Tupper Lake Sunmount still stand. 1926 holds the most, with 44.
Standing records at Tupper Lake Sunmount by the year they were set
Year setStanding records
189915
190012
190124
190226
190326
19048
190510
190613
19079
19087
19095
191016
191119
191217
191316
192521
192644
192710
192811
192917
193013
193117
19325
193317
193418
19354
193614
193716
193828
193919
194024
194112
194212
194313
194410
194523
194612
194718
19484
194914
195018
195114
19529
195317
195411
195510
19569
195719
19589
195914
19607
196110
196210
196311
196420
196517
196618
19679
196818
19699
19709
197112
197211
197318
197410
197512
197622
197715
197811
197927
198011
198123
198218
198315
19847
19854
19867
198711
198817
198916
199020
199111
199214
19939
19945
19956
19966
19974
19988
19994
200011
200114
200213
20036
20046
200510
20067
200714
200815
20093
20108
20144
20159
201611
201718
201818
201910
202014
20217
20226
20233
20248
20253
20265

All-Time Record Progression

3 new records
When Tupper Lake Sunmount set new all-time records 3 all-time records were set at Tupper Lake Sunmount between 15 February 1943 and 15 March 2017. Each dot is a new record. Record low maximum temperatureRecord daily precipitationRecord daily snowfall15 February 1943: Record low maximum temperature -29.4 C (-20.9 F)2 April 1996: Record daily precipitation 114.3 mm (4.5 in)15 March 2017: Record daily snowfall 63.5 cm (25.0 in)1950196019701980199020002010
3 all-time records were set at Tupper Lake Sunmount between 15 February 1943 and 15 March 2017. Each dot is a new record.
When Tupper Lake Sunmount set new all-time records
DateKindDetail
1943-02-15Record low maximum temperatureRecord low maximum temperature -29.4 C (-20.9 F)
1996-04-02Record daily precipitationRecord daily precipitation 114.3 mm (4.5 in)
2017-03-15Record daily snowfallRecord daily snowfall 63.5 cm (25.0 in)

Wettest Day of Each Month

Apr: 114.3 mm (4.5 in)
Record daily precipitation for each month at Tupper Lake Sunmount The wettest day on record for each calendar month at Tupper Lake Sunmount. The most was 114.3 mm (4.5 in) on 2 April 1996. 050100150 Jan: 55.9 mm (2.2 in), 13 January 2018 Jan Feb: 41.9 mm (1.6 in), 16 February 1954 Feb Mar: 52.1 mm (2.1 in), 5 March 1985 Mar Apr: 114.3 mm (4.5 in), 2 April 1996 Apr May: 74.2 mm (2.9 in), 30 May 1978 May Jun: 76.2 mm (3.0 in), 19 June 1905 Jun Jul: 87.4 mm (3.4 in), 11 July 2023 Jul Aug: 67.1 mm (2.6 in), 19 August 1937 Aug Sep: 80.0 mm (3.1 in), 7 September 1979 Sep Oct: 88.1 mm (3.5 in), 6 October 1932 Oct Nov: 61.0 mm (2.4 in), 8 November 1947 Nov Dec: 59.9 mm (2.4 in), 30 December 1942 Dec
The wettest day on record for each calendar month at Tupper Lake Sunmount. The most was 114.3 mm (4.5 in) on 2 April 1996.
Record daily precipitation for each month at Tupper Lake Sunmount
MonthRecord daily precipitation (mm)Date
Jan55.9 mm (2.2 in)13 January 2018
Feb41.9 mm (1.6 in)16 February 1954
Mar52.1 mm (2.1 in)5 March 1985
Apr114.3 mm (4.5 in)2 April 1996
May74.2 mm (2.9 in)30 May 1978
Jun76.2 mm (3.0 in)19 June 1905
Jul87.4 mm (3.4 in)11 July 2023
Aug67.1 mm (2.6 in)19 August 1937
Sep80.0 mm (3.1 in)7 September 1979
Oct88.1 mm (3.5 in)6 October 1932
Nov61.0 mm (2.4 in)8 November 1947
Dec59.9 mm (2.4 in)30 December 1942

Period of Record Coverage

1899 to 2026
Days with data per year at Tupper Lake Sunmount 114 years of record at Tupper Lake Sunmount, 1899 to 2026. 31 years have data for under 90 percent of days and are left out of rankings: 1899, 1900, 1903, 1904, 1906, 1907, 1908, 1909 and others. 1899: 202 of 365 days1900: 322 of 365 days1901: 360 of 365 days1902: 363 of 365 days1903: 237 of 365 days1904: 324 of 366 days1905: 351 of 365 days1906: 290 of 365 days1907: 216 of 365 days1908: 203 of 366 days1909: 244 of 365 days1910: 309 of 365 days1911: 303 of 365 days1912: 364 of 366 days1913: 267 of 365 days1925: 357 of 365 days1926: 362 of 365 days1927: 358 of 365 days1928: 303 of 366 days1929: 360 of 365 days1930: 304 of 365 days1931: 363 of 365 days1932: 362 of 366 days1933: 363 of 365 days1934: 364 of 365 days1935: 361 of 365 days1936: 366 of 366 days1937: 358 of 365 days1938: 365 of 365 days1939: 363 of 365 days1940: 353 of 366 days1941: 364 of 365 days1942: 362 of 365 days1943: 365 of 365 days1944: 365 of 366 days1945: 362 of 365 days1946: 365 of 365 days1947: 364 of 365 days1948: 366 of 366 days1949: 342 of 365 days1950: 365 of 365 days1951: 363 of 365 days1952: 366 of 366 days1953: 365 of 365 days1954: 364 of 365 days1955: 364 of 365 days1956: 365 of 366 days1957: 364 of 365 days1958: 365 of 365 days1959: 364 of 365 days1960: 365 of 366 days1961: 365 of 365 days1962: 365 of 365 days1963: 365 of 365 days1964: 365 of 366 days1965: 365 of 365 days1966: 357 of 365 days1967: 335 of 365 days1968: 366 of 366 days1969: 365 of 365 days1970: 365 of 365 days1971: 365 of 365 days1972: 363 of 366 days1973: 363 of 365 days1974: 365 of 365 days1975: 354 of 365 days1976: 365 of 366 days1977: 353 of 365 days1978: 361 of 365 days1979: 361 of 365 days1980: 351 of 366 days1981: 349 of 365 days1982: 330 of 365 days1983: 327 of 365 days1984: 361 of 366 days1985: 303 of 365 days1986: 334 of 365 days1987: 363 of 365 days1988: 321 of 366 days1989: 363 of 365 days1990: 358 of 365 days1991: 268 of 365 days1992: 364 of 366 days1993: 363 of 365 days1994: 327 of 365 days1995: 142 of 365 days1996: 180 of 366 days1997: 179 of 365 days1998: 360 of 365 days1999: 294 of 365 days2000: 355 of 366 days2001: 363 of 365 days2002: 356 of 365 days2003: 351 of 365 days2004: 363 of 366 days2005: 364 of 365 days2006: 360 of 365 days2007: 363 of 365 days2008: 362 of 366 days2009: 361 of 365 days2010: 212 of 365 days2014: 152 of 365 days2015: 361 of 365 days2016: 366 of 366 days2017: 363 of 365 days2018: 349 of 365 days2019: 364 of 365 days2020: 319 of 366 days2021: 265 of 365 days2022: 263 of 365 days2023: 97 of 365 days2024: 298 of 366 days2025: 196 of 365 days2026: 109 of 365 days19051935195019651980199520102025
114 years of record at Tupper Lake Sunmount, 1899 to 2026. 31 years have data for under 90 percent of days and are left out of rankings: 1899, 1900, 1903, 1904, 1906, 1907, 1908, 1909 and others.
Days with data per year at Tupper Lake Sunmount
YearDays with dataShare of yearComplete
189920255%No
190032288%No
190136099%Yes
190236399%Yes
190323765%No
190432489%No
190535196%Yes
190629079%No
190721659%No
190820355%No
190924467%No
191030985%No
191130383%No
191236499%Yes
191326773%No
192535798%Yes
192636299%Yes
192735898%Yes
192830383%No
192936099%Yes
193030483%No
193136399%Yes
193236299%Yes
193336399%Yes
1934364100%Yes
193536199%Yes
1936366100%Yes
193735898%Yes
1938365100%Yes
193936399%Yes
194035396%Yes
1941364100%Yes
194236299%Yes
1943365100%Yes
1944365100%Yes
194536299%Yes
1946365100%Yes
1947364100%Yes
1948366100%Yes
194934294%Yes
1950365100%Yes
195136399%Yes
1952366100%Yes
1953365100%Yes
1954364100%Yes
1955364100%Yes
1956365100%Yes
1957364100%Yes
1958365100%Yes
1959364100%Yes
1960365100%Yes
1961365100%Yes
1962365100%Yes
1963365100%Yes
1964365100%Yes
1965365100%Yes
196635798%Yes
196733592%Yes
1968366100%Yes
1969365100%Yes
1970365100%Yes
1971365100%Yes
197236399%Yes
197336399%Yes
1974365100%Yes
197535497%Yes
1976365100%Yes
197735397%Yes
197836199%Yes
197936199%Yes
198035196%Yes
198134996%Yes
198233090%Yes
198332790%No
198436199%Yes
198530383%No
198633492%Yes
198736399%Yes
198832188%No
198936399%Yes
199035898%Yes
199126873%No
199236499%Yes
199336399%Yes
199432790%No
199514239%No
199618049%No
199717949%No
199836099%Yes
199929481%No
200035597%Yes
200136399%Yes
200235698%Yes
200335196%Yes
200436399%Yes
2005364100%Yes
200636099%Yes
200736399%Yes
200836299%Yes
200936199%Yes
201021258%No
201415242%No
201536199%Yes
2016366100%Yes
201736399%Yes
201834996%Yes
2019364100%Yes
202031987%No
202126573%No
202226372%No
20239727%No
202429881%No
202519654%No
202610930%No

Latest Records

20
Latest records at Tupper Lake Sunmount
DateStationRecordValueBeat old record byOld record stoodSignificance
14 October 2026Tupper Lake Sunmount, USdaily rain (Provisional)50.8 mm (2.0 in)22.4 mm (0.9 in)124 years65 of 100 (Major)
4 July 2026Tupper Lake Sunmount, USdaily high min20.0 C (68.0 F)1.7 C (3.1 F)76 years37 of 100 (Notable)
20 May 2026Tupper Lake Sunmount, USdaily high min17.8 C (64.0 F)0.6 C (1.1 F)55 years27 of 100 (Routine)
11 March 2026Tupper Lake Sunmount, USdaily high max17.2 C (63.0 F)1.6 C (2.9 F)48 years26 of 100 (Routine)
9 March 2026Tupper Lake Sunmount, USdaily high min1.7 C (35.1 F)1.7 C (3.1 F)33 years22 of 100 (Routine)
8 March 2026Tupper Lake Sunmount, USdaily high max15.6 C (60.1 F)0.6 C (1.1 F)84 years35 of 100 (Notable)
18 January 2026Tupper Lake Sunmount, USdaily rain21.3 mm (0.8 in)0.2 mm (0.01 in)90 years20 of 100 (Routine)
31 October 2025Tupper Lake Sunmount, USdaily rain68.6 mm (2.7 in)53.4 mm (2.1 in)70 years71 of 100 (Major)
12 August 2025Tupper Lake Sunmount, USdaily high max (Tie)31.7 C (89.1 F)tie8 years3 of 100 (Routine)
11 August 2025Tupper Lake Sunmount, USdaily high max (Tie)32.2 C (90.0 F)tie80 years8 of 100 (Routine)
10 August 2025Tupper Lake Sunmount, USdaily high max (Tie)32.2 C (90.0 F)tie24 years4 of 100 (Routine)
24 July 2025Tupper Lake Sunmount, USdaily high max32.2 C (90.0 F)0.5 C (0.9 F)84 years36 of 100 (Notable)
8 July 2025Tupper Lake Sunmount, USdaily rain35.6 mm (1.4 in)1.8 mm (0.07 in)48 years25 of 100 (Routine)
24 June 2025Tupper Lake Sunmount, USdaily high min21.1 C (70.0 F)0.5 C (0.9 F)87 years37 of 100 (Notable)
19 June 2025Tupper Lake Sunmount, USdaily high min (Tie)18.9 C (66.0 F)tie8 years3 of 100 (Routine)
26 April 2025Tupper Lake Sunmount, USdaily rain15.5 mm (0.6 in)1.5 mm (0.06 in)74 years20 of 100 (Routine)
17 March 2025Tupper Lake Sunmount, USdaily rain20.6 mm (0.8 in)2.8 mm (0.11 in)48 years20 of 100 (Routine)
16 March 2025Tupper Lake Sunmount, USdaily high min5.6 C (42.1 F)2.3 C (4.1 F)52 years28 of 100 (Routine)
7 March 2025Tupper Lake Sunmount, USdaily rain38.1 mm (1.5 in)5.1 mm (0.20 in)120 years48 of 100 (Notable)
17 February 2025Tupper Lake Sunmount, USdaily snowfall26.7 cm (10.5 in)10.2 cm (4.0 in)73 years49 of 100 (Notable)

Climate Trend

77 complete years, 1901 to 2019
Annual mean temperature at Tupper Lake Sunmount as warming stripes, 1901 to 2019 One stripe for each of 77 complete years at Tupper Lake Sunmount, 1901 to 2019. Blue stripes are years cooler than the station's own mean of 4.9 C (40.7 F); red stripes are warmer. The coolest year was 1926, at 1.7 C (35.0 F), and the warmest was 1953, at 6.8 C (44.2 F). The strongest colour marks a difference of 3.3 C (5.9 F). 1901: 4.1 C, -0.8 C from the station mean1902: 4.5 C, -0.3 C from the station mean1905: 4.4 C, -0.5 C from the station mean1912: 4.0 C, -0.9 C from the station mean1925: 5.9 C, +1.0 C from the station mean1926: 1.7 C, -3.2 C from the station mean1927: 5.1 C, +0.3 C from the station mean1929: 4.9 C, 0.0 C from the station mean1931: 6.1 C, +1.3 C from the station mean1932: 5.1 C, +0.2 C from the station mean1933: 4.6 C, -0.2 C from the station mean1934: 3.8 C, -1.1 C from the station mean1935: 4.2 C, -0.6 C from the station mean1936: 4.7 C, -0.2 C from the station mean1937: 5.8 C, +1.0 C from the station mean1938: 5.9 C, +1.1 C from the station mean1939: 4.2 C, -0.7 C from the station mean1940: 3.2 C, -1.6 C from the station mean1941: 5.2 C, +0.4 C from the station mean1942: 5.1 C, +0.3 C from the station mean1943: 3.5 C, -1.4 C from the station mean1944: 4.9 C, 0.0 C from the station mean1945: 5.3 C, +0.4 C from the station mean1946: 5.6 C, +0.8 C from the station mean1947: 5.1 C, +0.3 C from the station mean1948: 5.1 C, +0.2 C from the station mean1950: 5.2 C, +0.3 C from the station mean1951: 5.8 C, +0.9 C from the station mean1952: 6.4 C, +1.5 C from the station mean1953: 6.8 C, +1.9 C from the station mean1954: 5.3 C, +0.4 C from the station mean1956: 4.5 C, -0.4 C from the station mean1957: 5.5 C, +0.7 C from the station mean1958: 4.3 C, -0.5 C from the station mean1959: 5.2 C, +0.3 C from the station mean1960: 4.6 C, -0.2 C from the station mean1961: 5.0 C, +0.1 C from the station mean1962: 4.2 C, -0.7 C from the station mean1963: 3.9 C, -1.0 C from the station mean1964: 5.0 C, +0.1 C from the station mean1965: 4.0 C, -0.8 C from the station mean1966: 5.3 C, +0.4 C from the station mean1968: 4.7 C, -0.1 C from the station mean1969: 4.7 C, -0.2 C from the station mean1970: 4.5 C, -0.3 C from the station mean1971: 4.6 C, -0.3 C from the station mean1972: 3.9 C, -1.0 C from the station mean1973: 6.0 C, +1.1 C from the station mean1974: 4.3 C, -0.5 C from the station mean1975: 5.2 C, +0.4 C from the station mean1976: 3.8 C, -1.1 C from the station mean1977: 4.6 C, -0.3 C from the station mean1978: 3.5 C, -1.4 C from the station mean1979: 4.4 C, -0.5 C from the station mean1981: 4.3 C, -0.6 C from the station mean1984: 5.3 C, +0.5 C from the station mean1987: 5.2 C, +0.3 C from the station mean1989: 3.6 C, -1.2 C from the station mean1990: 6.1 C, +1.3 C from the station mean1992: 3.7 C, -1.2 C from the station mean1993: 4.3 C, -0.6 C from the station mean1998: 6.7 C, +1.9 C from the station mean2000: 4.8 C, -0.1 C from the station mean2001: 5.8 C, +0.9 C from the station mean2002: 5.4 C, +0.6 C from the station mean2003: 4.7 C, -0.2 C from the station mean2004: 4.7 C, -0.2 C from the station mean2005: 5.7 C, +0.8 C from the station mean2006: 6.1 C, +1.3 C from the station mean2007: 4.9 C, +0.1 C from the station mean2008: 5.1 C, +0.3 C from the station mean2009: 4.9 C, 0.0 C from the station mean2015: 4.8 C, 0.0 C from the station mean2016: 6.0 C, +1.2 C from the station mean2017: 5.6 C, +0.7 C from the station mean2018: 5.0 C, +0.2 C from the station mean2019: 4.4 C, -0.5 C from the station mean190119101920193019401950196019701980199020002010
One stripe for each of 77 complete years at Tupper Lake Sunmount, 1901 to 2019. Blue stripes are years cooler than the station's own mean of 4.9 C (40.7 F); red stripes are warmer. The coolest year was 1926, at 1.7 C (35.0 F), and the warmest was 1953, at 6.8 C (44.2 F). The strongest colour marks a difference of 3.3 C (5.9 F).
Annual mean temperature at Tupper Lake Sunmount as warming stripes, 1901 to 2019
YearAnnual mean temperatureDifference from the station mean
19014.1 C-0.80 C
19024.5 C-0.32 C
19054.4 C-0.51 C
19124.0 C-0.90 C
19255.9 C+0.99 C
19261.7 C-3.21 C
19275.1 C+0.25 C
19294.9 C+0.01 C
19316.1 C+1.26 C
19325.1 C+0.20 C
19334.6 C-0.23 C
19343.8 C-1.08 C
19354.2 C-0.62 C
19364.7 C-0.17 C
19375.8 C+0.97 C
19385.9 C+1.08 C
19394.2 C-0.70 C
19403.2 C-1.63 C
19415.2 C+0.36 C
19425.1 C+0.28 C
19433.5 C-1.37 C
19444.9 C+0.01 C
19455.3 C+0.42 C
19465.6 C+0.77 C
19475.1 C+0.27 C
19485.1 C+0.24 C
19505.2 C+0.30 C
19515.8 C+0.93 C
19526.4 C+1.49 C
19536.8 C+1.93 C
19545.3 C+0.43 C
19564.5 C-0.37 C
19575.5 C+0.66 C
19584.3 C-0.53 C
19595.2 C+0.30 C
19604.6 C-0.25 C
19615.0 C+0.13 C
19624.2 C-0.69 C
19633.9 C-0.98 C
19645.0 C+0.10 C
19654.0 C-0.82 C
19665.3 C+0.43 C
19684.7 C-0.12 C
19694.7 C-0.17 C
19704.5 C-0.33 C
19714.6 C-0.30 C
19723.9 C-0.96 C
19736.0 C+1.12 C
19744.3 C-0.53 C
19755.2 C+0.36 C
19763.8 C-1.07 C
19774.6 C-0.30 C
19783.5 C-1.40 C
19794.4 C-0.51 C
19814.3 C-0.61 C
19845.3 C+0.45 C
19875.2 C+0.33 C
19893.6 C-1.23 C
19906.1 C+1.25 C
19923.7 C-1.16 C
19934.3 C-0.56 C
19986.7 C+1.87 C
20004.8 C-0.11 C
20015.8 C+0.94 C
20025.4 C+0.56 C
20034.7 C-0.17 C
20044.7 C-0.19 C
20055.7 C+0.83 C
20066.1 C+1.26 C
20074.9 C+0.06 C
20085.1 C+0.26 C
20094.9 C+0.00 C
20154.8 C-0.02 C
20166.0 C+1.17 C
20175.6 C+0.72 C
20185.0 C+0.17 C
20194.4 C-0.48 C

The fitted trend in annual mean temperature here over 1901 to 2019 is 0.05 C (-0.01 to 0.12) per decade. The interval includes zero, so the trend is not clearly different from zero. In Fahrenheit: 0.09 F (-0.02 to 0.21) per decade. The slope is a straight line fitted to 77 complete years; the brackets give its 95 percent interval.

Fitted temperature trends per decade at Tupper Lake Sunmount
MeasurePer decade (C)Per decade (F)PeriodComplete yearsReading
Annual mean temperature0.05 C (-0.01 to 0.12) per decade0.09 F (-0.02 to 0.21) per decade1901 to 201977Not clearly different from zero
Mean daily maximum0.05 C (-0.01 to 0.12) per decade0.10 F (-0.03 to 0.22) per decade1901 to 201977Not clearly different from zero
Mean daily minimum0.05 C (-0.02 to 0.12) per decade0.09 F (-0.03 to 0.22) per decade1901 to 201977Not clearly different from zero

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

1899 to 2026
Yearly extremes at Tupper Lake Sunmount: the record and the median year
MeasureRecordYear of the recordMedian yearYears with a value
Hottest day (TXx)36.7 C (98.1 F)193331.7 C (89.1 F)114
Coldest night (TNn)-40.0 C (-40.0 F)1908-32.2 C (-26.0 F)114
Wettest day (Rx1day)114.3 mm (4.5 in)199648.1 mm (1.9 in)114
Wettest five days (Rx5day)144.0 mm (5.7 in)199674.4 mm (2.9 in)114
Longest dry spell (CDD)47 days190313 days114

Hottest day (TXx)

Hottest day (TXx) at Tupper Lake Sunmount by year The hottest day of the year at Tupper Lake Sunmount, 1899 to 2026. The record is 36.7 C (98.1 F) in 1933, marked on the chart; the median year is 31.7 C (89.1 F). 253035401900192019401960198020002020Record: 36.7 C (98.1 F) in 1933
The hottest day of the year at Tupper Lake Sunmount, 1899 to 2026. The record is 36.7 C (98.1 F) in 1933, marked on the chart; the median year is 31.7 C (89.1 F).
Hottest day (TXx) at Tupper Lake Sunmount by year
YearHottest day (TXx)
189933.9 C (93.0 F)
190031.7 C (89.1 F)
190133.3 C (91.9 F)
190230.0 C (86.0 F)
190333.3 C (91.9 F)
190431.7 C (89.1 F)
190530.6 C (87.1 F)
190632.2 C (90.0 F)
190732.8 C (91.0 F)
190831.7 C (89.1 F)
190930.0 C (86.0 F)
191030.0 C (86.0 F)
191133.3 C (91.9 F)
191232.2 C (90.0 F)
191331.7 C (89.1 F)
192532.8 C (91.0 F)
192630.6 C (87.1 F)
192731.1 C (88.0 F)
192832.2 C (90.0 F)
192929.4 C (84.9 F)
193031.7 C (89.1 F)
193135.6 C (96.1 F)
193231.7 C (89.1 F)
193336.7 C (98.1 F)
193432.2 C (90.0 F)
193531.1 C (88.0 F)
193632.2 C (90.0 F)
193735.6 C (96.1 F)
193835.6 C (96.1 F)
193935.6 C (96.1 F)
194029.4 C (84.9 F)
194131.7 C (89.1 F)
194231.1 C (88.0 F)
194330.0 C (86.0 F)
194433.3 C (91.9 F)
194531.7 C (89.1 F)
194631.7 C (89.1 F)
194732.2 C (90.0 F)
194832.2 C (90.0 F)
194932.8 C (91.0 F)
195032.2 C (90.0 F)
195129.4 C (84.9 F)
195233.3 C (91.9 F)
195336.1 C (97.0 F)
195429.4 C (84.9 F)
195533.3 C (91.9 F)
195631.1 C (88.0 F)
195733.3 C (91.9 F)
195829.4 C (84.9 F)
195931.7 C (89.1 F)
196031.7 C (89.1 F)
196131.1 C (88.0 F)
196232.2 C (90.0 F)
196331.1 C (88.0 F)
196432.8 C (91.0 F)
196531.7 C (89.1 F)
196633.9 C (93.0 F)
196732.2 C (90.0 F)
196834.4 C (93.9 F)
196931.7 C (89.1 F)
197030.6 C (87.1 F)
197132.2 C (90.0 F)
197230.6 C (87.1 F)
197331.7 C (89.1 F)
197431.7 C (89.1 F)
197536.7 C (98.1 F)
197630.0 C (86.0 F)
197732.2 C (90.0 F)
197831.7 C (89.1 F)
197932.2 C (90.0 F)
198030.0 C (86.0 F)
198134.4 C (93.9 F)
198231.7 C (89.1 F)
198335.0 C (95.0 F)
198431.1 C (88.0 F)
198532.8 C (91.0 F)
198630.0 C (86.0 F)
198732.2 C (90.0 F)
198833.9 C (93.0 F)
198930.6 C (87.1 F)
199030.6 C (87.1 F)
199130.0 C (86.0 F)
199228.9 C (84.0 F)
199331.7 C (89.1 F)
199433.3 C (91.9 F)
199525.0 C (77.0 F)
199628.3 C (82.9 F)
199731.1 C (88.0 F)
199830.6 C (87.1 F)
199931.7 C (89.1 F)
200030.0 C (86.0 F)
200132.2 C (90.0 F)
200233.3 C (91.9 F)
200332.2 C (90.0 F)
200429.4 C (84.9 F)
200532.8 C (91.0 F)
200633.3 C (91.9 F)
200732.2 C (90.0 F)
200831.1 C (88.0 F)
200931.1 C (88.0 F)
201033.9 C (93.0 F)
201428.3 C (82.9 F)
201531.1 C (88.0 F)
201631.7 C (89.1 F)
201731.1 C (88.0 F)
201833.9 C (93.0 F)
201930.6 C (87.1 F)
202032.8 C (91.0 F)
202130.6 C (87.1 F)
202231.1 C (88.0 F)
202331.7 C (89.1 F)
202431.1 C (88.0 F)
202532.8 C (91.0 F)
202632.8 C (91.0 F)

Coldest night (TNn)

Coldest night (TNn) at Tupper Lake Sunmount by year The coldest night of the year at Tupper Lake Sunmount, 1899 to 2026. The record is -40.0 C (-40.0 F) in 1908, marked on the chart; the median year is -32.2 C (-26.0 F). -40-30-20-101900192019401960198020002020Record: -40.0 C (-40.0 F) in 1908
The coldest night of the year at Tupper Lake Sunmount, 1899 to 2026. The record is -40.0 C (-40.0 F) in 1908, marked on the chart; the median year is -32.2 C (-26.0 F).
Coldest night (TNn) at Tupper Lake Sunmount by year
YearColdest night (TNn)
1899-26.1 C (-15.0 F)
1900-33.9 C (-29.0 F)
1901-38.3 C (-36.9 F)
1902-34.4 C (-29.9 F)
1903-37.8 C (-36.0 F)
1904-31.7 C (-25.1 F)
1905-35.0 C (-31.0 F)
1906-36.1 C (-33.0 F)
1907-35.6 C (-32.1 F)
1908-40.0 C (-40.0 F)
1909-36.7 C (-34.1 F)
1910-36.7 C (-34.1 F)
1911-33.9 C (-29.0 F)
1912-38.9 C (-38.0 F)
1913-33.3 C (-27.9 F)
1925-30.6 C (-23.1 F)
1926-35.0 C (-31.0 F)
1927-32.2 C (-26.0 F)
1928-31.7 C (-25.1 F)
1929-28.3 C (-18.9 F)
1930-35.6 C (-32.1 F)
1931-28.9 C (-20.0 F)
1932-31.1 C (-24.0 F)
1933-38.3 C (-36.9 F)
1934-37.2 C (-35.0 F)
1935-34.4 C (-29.9 F)
1936-29.4 C (-20.9 F)
1937-22.2 C (-8.0 F)
1938-33.3 C (-27.9 F)
1939-33.9 C (-29.0 F)
1940-31.1 C (-24.0 F)
1941-29.4 C (-20.9 F)
1942-38.9 C (-38.0 F)
1943-38.3 C (-36.9 F)
1944-30.0 C (-22.0 F)
1945-31.7 C (-25.1 F)
1946-32.2 C (-26.0 F)
1947-28.3 C (-18.9 F)
1948-35.6 C (-32.1 F)
1949-26.7 C (-16.1 F)
1950-30.6 C (-23.1 F)
1951-32.8 C (-27.0 F)
1952-31.1 C (-24.0 F)
1953-26.7 C (-16.1 F)
1954-33.9 C (-29.0 F)
1955-36.1 C (-33.0 F)
1956-30.6 C (-23.1 F)
1957-38.3 C (-36.9 F)
1958-32.8 C (-27.0 F)
1959-33.9 C (-29.0 F)
1960-30.0 C (-22.0 F)
1961-32.2 C (-26.0 F)
1962-33.9 C (-29.0 F)
1963-32.2 C (-26.0 F)
1964-30.6 C (-23.1 F)
1965-37.8 C (-36.0 F)
1966-33.9 C (-29.0 F)
1967-36.7 C (-34.1 F)
1968-37.8 C (-36.0 F)
1969-28.9 C (-20.0 F)
1970-31.7 C (-25.1 F)
1971-35.6 C (-32.1 F)
1972-36.1 C (-33.0 F)
1973-33.3 C (-27.9 F)
1974-32.2 C (-26.0 F)
1975-31.7 C (-25.1 F)
1976-36.7 C (-34.1 F)
1977-31.7 C (-25.1 F)
1978-34.4 C (-29.9 F)
1979-38.9 C (-38.0 F)
1980-35.0 C (-31.0 F)
1981-37.2 C (-35.0 F)
1982-33.9 C (-29.0 F)
1983-32.2 C (-26.0 F)
1984-31.7 C (-25.1 F)
1985-27.2 C (-17.0 F)
1986-29.4 C (-20.9 F)
1987-33.3 C (-27.9 F)
1988-31.7 C (-25.1 F)
1989-36.1 C (-33.0 F)
1990-26.7 C (-16.1 F)
1991-32.2 C (-26.0 F)
1992-30.6 C (-23.1 F)
1993-33.9 C (-29.0 F)
1994-35.6 C (-32.1 F)
1995-27.2 C (-17.0 F)
1996-30.6 C (-23.1 F)
1997-23.9 C (-11.0 F)
1998-32.2 C (-26.0 F)
1999-35.0 C (-31.0 F)
2000-31.7 C (-25.1 F)
2001-25.6 C (-14.1 F)
2002-29.4 C (-20.9 F)
2003-33.3 C (-27.9 F)
2004-35.0 C (-31.0 F)
2005-32.2 C (-26.0 F)
2006-24.4 C (-11.9 F)
2007-36.1 C (-33.0 F)
2008-28.9 C (-20.0 F)
2009-29.4 C (-20.9 F)
2010-28.9 C (-20.0 F)
2014-16.1 C (3.0 F)
2015-31.7 C (-25.1 F)
2016-32.2 C (-26.0 F)
2017-29.4 C (-20.9 F)
2018-33.9 C (-29.0 F)
2019-31.1 C (-24.0 F)
2020-27.2 C (-17.0 F)
2021-27.8 C (-18.0 F)
2022-32.2 C (-26.0 F)
2023-21.1 C (-6.0 F)
2024-25.0 C (-13.0 F)
2025-29.4 C (-20.9 F)
2026-31.1 C (-24.0 F)

Wettest day (Rx1day)

Wettest day (Rx1day) at Tupper Lake Sunmount by year The wettest day of the year at Tupper Lake Sunmount, 1899 to 2026. The record is 114.3 mm (4.5 in) in 1996, marked on the chart; the median year is 48.1 mm (1.9 in). 02550751001251900192019401960198020002020Record: 114.3 mm (4.5 in) in 1996
The wettest day of the year at Tupper Lake Sunmount, 1899 to 2026. The record is 114.3 mm (4.5 in) in 1996, marked on the chart; the median year is 48.1 mm (1.9 in).
Wettest day (Rx1day) at Tupper Lake Sunmount by year
YearWettest day (Rx1day)
189941.9 mm (1.6 in)
190040.6 mm (1.6 in)
190150.8 mm (2.0 in)
190253.1 mm (2.1 in)
190359.4 mm (2.3 in)
190458.4 mm (2.3 in)
190576.2 mm (3.0 in)
190663.5 mm (2.5 in)
190725.4 mm (1.0 in)
190828.4 mm (1.1 in)
190922.4 mm (0.9 in)
191038.1 mm (1.5 in)
191130.5 mm (1.2 in)
191236.1 mm (1.4 in)
191336.8 mm (1.4 in)
192550.8 mm (2.0 in)
192657.2 mm (2.3 in)
192745.5 mm (1.8 in)
192838.6 mm (1.5 in)
192969.3 mm (2.7 in)
193045.0 mm (1.8 in)
193151.6 mm (2.0 in)
193288.1 mm (3.5 in)
193333.0 mm (1.3 in)
193430.5 mm (1.2 in)
193541.4 mm (1.6 in)
193642.9 mm (1.7 in)
193767.1 mm (2.6 in)
193858.2 mm (2.3 in)
193923.4 mm (0.9 in)
194047.2 mm (1.9 in)
194140.4 mm (1.6 in)
194278.2 mm (3.1 in)
194332.0 mm (1.3 in)
194445.7 mm (1.8 in)
194549.5 mm (1.9 in)
194639.1 mm (1.5 in)
194761.0 mm (2.4 in)
194842.9 mm (1.7 in)
194942.4 mm (1.7 in)
195041.4 mm (1.6 in)
195152.1 mm (2.1 in)
195237.8 mm (1.5 in)
195363.5 mm (2.5 in)
195451.3 mm (2.0 in)
195534.3 mm (1.4 in)
195637.6 mm (1.5 in)
195740.1 mm (1.6 in)
195835.1 mm (1.4 in)
195950.8 mm (2.0 in)
196032.5 mm (1.3 in)
196153.6 mm (2.1 in)
196263.5 mm (2.5 in)
196357.9 mm (2.3 in)
196431.5 mm (1.2 in)
196551.8 mm (2.0 in)
196630.5 mm (1.2 in)
196727.4 mm (1.1 in)
196841.9 mm (1.6 in)
196957.4 mm (2.3 in)
197043.7 mm (1.7 in)
197165.8 mm (2.6 in)
197248.3 mm (1.9 in)
197353.1 mm (2.1 in)
197461.0 mm (2.4 in)
197547.8 mm (1.9 in)
197651.3 mm (2.0 in)
197752.1 mm (2.1 in)
197874.2 mm (2.9 in)
197980.0 mm (3.1 in)
198038.1 mm (1.5 in)
198150.8 mm (2.0 in)
198240.1 mm (1.6 in)
198349.5 mm (1.9 in)
198440.6 mm (1.6 in)
198555.4 mm (2.2 in)
198646.0 mm (1.8 in)
198735.1 mm (1.4 in)
198841.9 mm (1.6 in)
198974.9 mm (2.9 in)
199046.7 mm (1.8 in)
199131.8 mm (1.3 in)
199261.7 mm (2.4 in)
199341.4 mm (1.6 in)
199478.2 mm (3.1 in)
199573.7 mm (2.9 in)
1996114.3 mm (4.5 in)
199752.1 mm (2.1 in)
199849.0 mm (1.9 in)
199926.7 mm (1.1 in)
200064.8 mm (2.6 in)
200143.2 mm (1.7 in)
200247.0 mm (1.9 in)
200353.3 mm (2.1 in)
200440.1 mm (1.6 in)
200561.0 mm (2.4 in)
200646.5 mm (1.8 in)
200750.8 mm (2.0 in)
200843.9 mm (1.7 in)
200933.8 mm (1.3 in)
201033.5 mm (1.3 in)
201418.3 mm (0.7 in)
201546.2 mm (1.8 in)
201652.1 mm (2.1 in)
201767.1 mm (2.6 in)
201855.9 mm (2.2 in)
201948.3 mm (1.9 in)
202039.6 mm (1.6 in)
202153.3 mm (2.1 in)
202253.1 mm (2.1 in)
202387.4 mm (3.4 in)
202480.8 mm (3.2 in)
202568.6 mm (2.7 in)
202650.8 mm (2.0 in)

Wettest five days (Rx5day)

Wettest five days (Rx5day) at Tupper Lake Sunmount by year The wettest five days of the year at Tupper Lake Sunmount, 1899 to 2026. The record is 144.0 mm (5.7 in) in 1996, marked on the chart; the median year is 74.4 mm (2.9 in). 0501001501900192019401960198020002020Record: 144.0 mm (5.7 in) in 1996
The wettest five days of the year at Tupper Lake Sunmount, 1899 to 2026. The record is 144.0 mm (5.7 in) in 1996, marked on the chart; the median year is 74.4 mm (2.9 in).
Wettest five days (Rx5day) at Tupper Lake Sunmount by year
YearWettest five days (Rx5day)
189962.8 mm (2.5 in)
190067.8 mm (2.7 in)
190180.8 mm (3.2 in)
190284.1 mm (3.3 in)
190377.2 mm (3.0 in)
190478.7 mm (3.1 in)
1905122.0 mm (4.8 in)
190672.4 mm (2.9 in)
190748.3 mm (1.9 in)
190853.3 mm (2.1 in)
190950.1 mm (2.0 in)
191046.5 mm (1.8 in)
191146.8 mm (1.8 in)
191269.4 mm (2.7 in)
191368.3 mm (2.7 in)
1925119.3 mm (4.7 in)
192660.0 mm (2.4 in)
192770.8 mm (2.8 in)
192863.5 mm (2.5 in)
192998.5 mm (3.9 in)
193068.9 mm (2.7 in)
193166.3 mm (2.6 in)
1932128.8 mm (5.1 in)
193344.2 mm (1.7 in)
193444.3 mm (1.7 in)
193577.0 mm (3.0 in)
193669.6 mm (2.7 in)
1937126.7 mm (5.0 in)
193881.0 mm (3.2 in)
193939.1 mm (1.5 in)
194049.8 mm (2.0 in)
194148.3 mm (1.9 in)
194286.2 mm (3.4 in)
194374.6 mm (2.9 in)
194489.9 mm (3.5 in)
194585.3 mm (3.4 in)
194658.4 mm (2.3 in)
194784.9 mm (3.3 in)
194866.5 mm (2.6 in)
194976.4 mm (3.0 in)
195087.8 mm (3.5 in)
195159.0 mm (2.3 in)
195271.1 mm (2.8 in)
1953107.1 mm (4.2 in)
195478.0 mm (3.1 in)
195575.0 mm (3.0 in)
195661.9 mm (2.4 in)
195756.2 mm (2.2 in)
195855.3 mm (2.2 in)
195989.7 mm (3.5 in)
196057.2 mm (2.3 in)
196180.5 mm (3.2 in)
196299.8 mm (3.9 in)
196374.7 mm (2.9 in)
196446.7 mm (1.8 in)
1965101.9 mm (4.0 in)
196646.7 mm (1.8 in)
196761.2 mm (2.4 in)
196858.9 mm (2.3 in)
196985.4 mm (3.4 in)
197055.4 mm (2.2 in)
197180.0 mm (3.1 in)
197269.3 mm (2.7 in)
197371.2 mm (2.8 in)
197464.6 mm (2.5 in)
197568.3 mm (2.7 in)
197688.0 mm (3.5 in)
197767.9 mm (2.7 in)
197876.2 mm (3.0 in)
197984.6 mm (3.3 in)
198055.2 mm (2.2 in)
198193.7 mm (3.7 in)
198260.0 mm (2.4 in)
198365.3 mm (2.6 in)
198462.0 mm (2.4 in)
198583.1 mm (3.3 in)
1986100.2 mm (3.9 in)
198751.6 mm (2.0 in)
198878.7 mm (3.1 in)
198994.1 mm (3.7 in)
199066.4 mm (2.6 in)
199170.7 mm (2.8 in)
199274.3 mm (2.9 in)
199368.3 mm (2.7 in)
1994112.2 mm (4.4 in)
199580.8 mm (3.2 in)
1996144.0 mm (5.7 in)
199776.6 mm (3.0 in)
1998100.6 mm (4.0 in)
199955.9 mm (2.2 in)
2000118.6 mm (4.7 in)
200185.9 mm (3.4 in)
200294.5 mm (3.7 in)
200373.7 mm (2.9 in)
200475.9 mm (3.0 in)
200570.7 mm (2.8 in)
200684.6 mm (3.3 in)
200779.7 mm (3.1 in)
200888.3 mm (3.5 in)
200968.2 mm (2.7 in)
201056.3 mm (2.2 in)
201434.8 mm (1.4 in)
2015100.8 mm (4.0 in)
201686.9 mm (3.4 in)
201785.3 mm (3.4 in)
201877.5 mm (3.1 in)
201975.7 mm (3.0 in)
202045.0 mm (1.8 in)
202165.0 mm (2.6 in)
2022102.4 mm (4.0 in)
202384.8 mm (3.3 in)
202483.8 mm (3.3 in)
202576.5 mm (3.0 in)
202655.7 mm (2.2 in)

Longest dry spell (CDD)

Longest dry spell (CDD) at Tupper Lake Sunmount by year The longest dry spell of the year at Tupper Lake Sunmount, 1899 to 2026. The record is 47 days in 1903, marked on the chart; the median year is 13 days. 02040601900192019401960198020002020Record: 47 days in 1903
The longest dry spell of the year at Tupper Lake Sunmount, 1899 to 2026. The record is 47 days in 1903, marked on the chart; the median year is 13 days.
Longest dry spell (CDD) at Tupper Lake Sunmount by year
YearLongest dry spell (CDD)
189912 days
190011 days
190112 days
190218 days
190347 days
190429 days
190513 days
190614 days
190711 days
190822 days
190915 days
191017 days
191113 days
191212 days
191315 days
192513 days
19268 days
192715 days
192812 days
192910 days
193017 days
193114 days
193214 days
193311 days
193414 days
193514 days
193611 days
193721 days
193813 days
193921 days
194011 days
194123 days
194213 days
194313 days
194416 days
194511 days
194610 days
194726 days
194826 days
194912 days
195012 days
195115 days
195216 days
195316 days
19549 days
195510 days
195615 days
195715 days
195811 days
195917 days
196014 days
196111 days
196212 days
196319 days
196412 days
196518 days
196615 days
196715 days
196818 days
196913 days
197018 days
197112 days
197215 days
197311 days
197412 days
197513 days
197611 days
197716 days
197817 days
197910 days
198014 days
198110 days
198216 days
198311 days
198410 days
198514 days
198612 days
198715 days
198822 days
198911 days
199010 days
199112 days
199210 days
199310 days
199412 days
199513 days
19968 days
199710 days
199814 days
199917 days
200010 days
200125 days
200220 days
200313 days
200412 days
200516 days
200612 days
200712 days
200814 days
200914 days
201013 days
201410 days
201517 days
201613 days
201710 days
201811 days
201911 days
202012 days
202114 days
20229 days
202313 days
202416 days
20259 days
20263 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

77 years with a frost

Across 77 years with a frost, the median last spring frost at Tupper Lake Sunmount falls on 26 May and the median first autumn frost on 16 September, which leaves a median of 114 days between them.

In 1973 to 2019 the median growing season was 119 days. That is 9 days more than in 1901 to 1953.

Fitted over all years, the growing season changes by +3.8 days per decade at this station.

Frost dates and growing season at Tupper Lake Sunmount
MeasureMedian, all yearsEarliest period (1901 to 1953)Recent period (1973 to 2019)Recent against earliestFitted trend
Last spring frost26 May27 May23 May4 days earlier-1.7 days per decade
First autumn frost16 September16 September20 September4 days later+2.1 days per decade
Growing days114 days110 days119 days9 days more+3.8 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

84 years, 1905 to 2019

A day with at least 47.7 mm (1.9 in) of rain is expected about once in 2 years. A day with at least 88.8 mm (3.5 in) of rain is expected about once in 100 years.

Rainfall return levels at Tupper Lake Sunmount: the daily rain expected about once in a given number of years
Expected about once inA day with at leastNote
2 years47.7 mm (1.9 in)
5 years60.0 mm (2.4 in)
10 years67.6 mm (2.7 in)
25 years76.6 mm (3.0 in)
50 years82.8 mm (3.3 in)
100 years88.8 mm (3.5 in)Longer than the 84 years of record

The levels come from a generalised extreme value (GEV) distribution fitted by L-moments to the wettest-day total of each year, 84 years of values from 1905 to 2019.

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: 88.1 mm (3.5 in) in 1932; 80.0 mm (3.1 in) in 1979; 78.2 mm (3.1 in) in 1942.

Station Changes

1 suspected

One change was suspected in the annual mean temperature of Tupper Lake Sunmount, at 1974. Each is measured against neighbouring stations.

  • Relative to 5 neighbouring stations, the station's annual mean temperature from 1974 ran 0.3 C (0.5 F) lower than in the years before (possible change).
Suspected changes in the annual mean temperature at Tupper Lake Sunmount, against neighbouring stations
YearShift (C)Shift (F)StrengthNeighbours
1974-0.3-0.5possible5

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.

Download the Data

  • Data for Tupper Lake Sunmount standing records by year: CSV or JSON. Field meanings are on the data page.
  • Data for Tupper Lake Sunmount 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 2026-10-17 (17 October 2026). Records are computed by this site and are not official.

Data as of . Last revised (2026-10-17).