Daily records
Page built 2026-10-15
Data as of 2026-10-14
Search
Built 2026-10-15 (15 October 2026)

Grimsby Weather Records (CA006133047)

Record envelope, standing records and threshold days for Grimsby (CA006133047), Ontario, Canada, with 76 years of record.

Key Facts for Grimsby

  • Grimsby (CA006133047) is a weather station in Ontario, Canada at 43.20 latitude and -79.57 longitude, 91 m (299 ft) above sea level.
  • The station reports from 1910 to 1985, 76 years of record.
  • 1,464 records set at Grimsby still stand.
  • Records are tracked for tmax, tmin, prcp, snow: an element needs 30 years of data to be eligible.
  • Grimsby set a daily record low maximum temperature of -12.0 C (10.4 F) on 24 December 1983.

About the Station

  • Location: Ontario, Canada, 43.20 latitude, -79.57 longitude.
  • Elevation: 91 m (299 ft).
  • Period of record: 1910 to 1985, 76 years.
  • Eligible elements: tmax, tmin, prcp, snow.

Daily Record Envelope and 2026

0 days at or beyond a record
Daily record high and record low at Grimsby, with 2026 drawn through them The band shows the record high and record low for each calendar day at Grimsby. The lines show the 2026 daily maximum and minimum. 0 days in 2026 matched or passed a record. Temperatures are in degrees Celsius. -40-200204060 JanFebMarAprMayJunJulAugSepOctNovDec
The band shows the record high and record low for each calendar day at Grimsby. The lines show the 2026 daily maximum and minimum. 0 days in 2026 matched or passed a record. Temperatures are in degrees Celsius.
Daily record high and record low at Grimsby, with 2026 drawn through them
MonthHighest record highLowest record low2026 highest maximum2026 lowest minimum
Jan19.4 C (66.9 F)-25.0 C (-13.0 F)n/an/a
Feb17.2 C (63.0 F)-26.1 C (-15.0 F)n/an/a
Mar26.1 C (79.0 F)-21.7 C (-7.1 F)n/an/a
Apr30.6 C (87.1 F)-16.1 C (3.0 F)n/an/a
May36.1 C (97.0 F)-2.8 C (27.0 F)n/an/a
Jun36.1 C (97.0 F)2.2 C (36.0 F)n/an/a
Jul40.6 C (105.1 F)6.7 C (44.1 F)n/an/a
Aug39.4 C (102.9 F)4.4 C (39.9 F)n/an/a
Sep37.8 C (100.0 F)0.0 C (32.0 F)n/an/a
Oct31.7 C (89.1 F)-7.2 C (19.0 F)n/an/a
Nov26.1 C (79.0 F)-13.9 C (7.0 F)n/an/a
Dec21.0 C (69.8 F)-27.2 C (-17.0 F)n/an/a

Which Years Hold Standing Records

1,464 standing records
Standing records at Grimsby by the year they were set 1,464 records at Grimsby still stand. 1916 holds the most, with 58. 02040601910: 231911: 461912: 281913: 241914: 371915: 121916: 581917: 401921: 211922: 261923: 421924: 341925: 491926: 261927: 341929: 251931: 251932: 121934: 51935: 61936: 31937: 151938: 151939: 211945: 321946: 271947: 231948: 241949: 291950: 231951: 191952: 121953: 211954: 181955: 231956: 161957: 181958: 151959: 261960: 191961: 171962: 201963: 301964: 261965: 281966: 221967: 201968: 191969: 131970: 151971: 141972: 131973: 221974: 261975: 181976: 351977: 231978: 211979: 331980: 171981: 261982: 251983: 9191019171927193719491956196319701977
1,464 records at Grimsby still stand. 1916 holds the most, with 58.
Standing records at Grimsby by the year they were set
Year setStanding records
191023
191146
191228
191324
191437
191512
191658
191740
192121
192226
192342
192434
192549
192626
192734
192925
193125
193212
19345
19356
19363
193715
193815
193921
194532
194627
194723
194824
194929
195023
195119
195212
195321
195418
195523
195616
195718
195815
195926
196019
196117
196220
196330
196426
196528
196622
196720
196819
196913
197015
197114
197213
197322
197426
197518
197635
197723
197821
197933
198017
198126
198225
19839

Wettest Day of Each Month

Oct: 122.7 mm (4.8 in)
Record daily precipitation for each month at Grimsby The wettest day on record for each calendar month at Grimsby. The most was 122.7 mm (4.8 in) on 15 October 1954. 050100150 Jan: 50.8 mm (2.0 in), 4 January 1917 Jan Feb: 54.9 mm (2.2 in), 16 February 1954 Feb Mar: 51.1 mm (2.0 in), 31 March 1945 Mar Apr: 45.7 mm (1.8 in), 28 April 1929 Apr May: 62.7 mm (2.5 in), 25 May 1953 May Jun: 82.0 mm (3.2 in), 11 June 1922 Jun Jul: 66.3 mm (2.6 in), 12 July 1964 Jul Aug: 107.7 mm (4.2 in), 28 August 1950 Aug Sep: 60.5 mm (2.4 in), 14 September 1979 Sep Oct: 122.7 mm (4.8 in), 15 October 1954 Oct Nov: 59.7 mm (2.4 in), 6 November 1951 Nov Dec: 40.1 mm (1.6 in), 20 December 1949 Dec
The wettest day on record for each calendar month at Grimsby. The most was 122.7 mm (4.8 in) on 15 October 1954.
Record daily precipitation for each month at Grimsby
MonthRecord daily precipitation (mm)Date
Jan50.8 mm (2.0 in)4 January 1917
Feb54.9 mm (2.2 in)16 February 1954
Mar51.1 mm (2.0 in)31 March 1945
Apr45.7 mm (1.8 in)28 April 1929
May62.7 mm (2.5 in)25 May 1953
Jun82.0 mm (3.2 in)11 June 1922
Jul66.3 mm (2.6 in)12 July 1964
Aug107.7 mm (4.2 in)28 August 1950
Sep60.5 mm (2.4 in)14 September 1979
Oct122.7 mm (4.8 in)15 October 1954
Nov59.7 mm (2.4 in)6 November 1951
Dec40.1 mm (1.6 in)20 December 1949

Period of Record Coverage

1910 to 1983
Days with data per year at Grimsby 63 years of record at Grimsby, 1910 to 1983. 9 years have data for under 90 percent of days and are left out of rankings: 1921, 1926, 1929, 1931, 1932, 1934, 1935, 1936 and others. 1910: 365 of 365 days1911: 365 of 365 days1912: 366 of 366 days1913: 365 of 365 days1914: 364 of 365 days1915: 365 of 365 days1916: 366 of 366 days1917: 363 of 365 days1921: 300 of 365 days1922: 360 of 365 days1923: 362 of 365 days1924: 365 of 366 days1925: 352 of 365 days1926: 272 of 365 days1927: 364 of 365 days1929: 273 of 365 days1931: 244 of 365 days1932: 91 of 366 days1934: 112 of 365 days1935: 86 of 365 days1936: 18 of 366 days1937: 269 of 365 days1938: 360 of 365 days1939: 352 of 365 days1945: 365 of 365 days1946: 364 of 365 days1947: 365 of 365 days1948: 366 of 366 days1949: 363 of 365 days1950: 364 of 365 days1951: 365 of 365 days1952: 364 of 366 days1953: 364 of 365 days1954: 365 of 365 days1955: 364 of 365 days1956: 365 of 366 days1957: 365 of 365 days1958: 365 of 365 days1959: 362 of 365 days1960: 366 of 366 days1961: 365 of 365 days1962: 365 of 365 days1963: 365 of 365 days1964: 364 of 366 days1965: 365 of 365 days1966: 365 of 365 days1967: 365 of 365 days1968: 366 of 366 days1969: 357 of 365 days1970: 359 of 365 days1971: 358 of 365 days1972: 360 of 366 days1973: 358 of 365 days1974: 357 of 365 days1975: 358 of 365 days1976: 354 of 366 days1977: 329 of 365 days1978: 365 of 365 days1979: 352 of 365 days1980: 365 of 366 days1981: 356 of 365 days1982: 355 of 365 days1983: 357 of 365 days19101950196019701980
63 years of record at Grimsby, 1910 to 1983. 9 years have data for under 90 percent of days and are left out of rankings: 1921, 1926, 1929, 1931, 1932, 1934, 1935, 1936 and others.
Days with data per year at Grimsby
YearDays with dataShare of yearComplete
1910365100%Yes
1911365100%Yes
1912366100%Yes
1913365100%Yes
1914364100%Yes
1915365100%Yes
1916366100%Yes
191736399%Yes
192130082%No
192236099%Yes
192336299%Yes
1924365100%Yes
192535296%Yes
192627275%No
1927364100%Yes
192927375%No
193124467%No
19329125%No
193411231%No
19358624%No
1936185%No
193726974%No
193836099%Yes
193935296%Yes
1945365100%Yes
1946364100%Yes
1947365100%Yes
1948366100%Yes
194936399%Yes
1950364100%Yes
1951365100%Yes
195236499%Yes
1953364100%Yes
1954365100%Yes
1955364100%Yes
1956365100%Yes
1957365100%Yes
1958365100%Yes
195936299%Yes
1960366100%Yes
1961365100%Yes
1962365100%Yes
1963365100%Yes
196436499%Yes
1965365100%Yes
1966365100%Yes
1967365100%Yes
1968366100%Yes
196935798%Yes
197035998%Yes
197135898%Yes
197236098%Yes
197335898%Yes
197435798%Yes
197535898%Yes
197635497%Yes
197732990%Yes
1978365100%Yes
197935296%Yes
1980365100%Yes
198135698%Yes
198235597%Yes
198335798%Yes

Latest Records

20
Latest records at Grimsby
DateStationRecordValueBeat old record byOld record stoodSignificance
24 December 1983Grimsby, CAdaily low max-12.0 C (10.4 F)4.2 C (7.6 F)24 years21 of 100 (Routine)
19 December 1983Grimsby, CAdaily low max-8.5 C (16.7 F)0.5 C (0.9 F)2 years7 of 100 (Routine)
11 November 1983Grimsby, CAdaily snowfall7.0 cm (2.8 in)7.0 cm (2.8 in)72 years45 of 100 (Notable)
11 November 1983Grimsby, CAdaily rain14.0 mm (0.6 in)1.8 mm (0.07 in)29 years17 of 100 (Routine)
10 November 1983Grimsby, CAdaily rain13.6 mm (0.5 in)1.9 mm (0.07 in)20 years15 of 100 (Routine)
13 October 1983Grimsby, CAdaily rain22.2 mm (0.9 in)8.7 mm (0.34 in)9 years18 of 100 (Routine)
13 September 1983Grimsby, CAdaily rain50.4 mm (2.0 in)14.8 mm (0.6 in)12 years24 of 100 (Routine)
6 September 1983Grimsby, CAdaily high min23.5 C (74.3 F)0.7 C (1.3 F)13 years12 of 100 (Routine)
11 August 1983Grimsby, CAdaily low max17.0 C (62.6 F)1.9 C (3.4 F)32 years20 of 100 (Routine)
15 July 1983Grimsby, CAdaily high max36.0 C (96.8 F)1.0 C (1.8 F)66 years29 of 100 (Routine)
27 June 1983Grimsby, CAdaily rain54.8 mm (2.2 in)24.1 mm (0.9 in)20 years35 of 100 (Notable)
30 April 1983Grimsby, CAdaily rain21.0 mm (0.8 in)6.3 mm (0.25 in)20 years20 of 100 (Routine)
19 April 1983Grimsby, CAdaily snowfall0.6 cm (0.2 in)0.6 cm (0.2 in)72 years20 of 100 (Routine)
18 April 1983Grimsby, CAdaily low max3.0 C (37.4 F)0.3 C (0.5 F)22 years13 of 100 (Routine)
24 March 1983Grimsby, CAdaily low max-4.0 C (24.8 F)1.5 C (2.7 F)4 years10 of 100 (Routine)
18 March 1983Grimsby, CAdaily rain21.6 mm (0.9 in)3.8 mm (0.15 in)5 years13 of 100 (Routine)
15 March 1983Grimsby, CAdaily high min4.0 C (39.2 F)0.1 C (0.2 F)37 years18 of 100 (Routine)
11 January 1983Grimsby, CAdaily high min3.5 C (38.3 F)0.7 C (1.3 F)27 years16 of 100 (Routine)
28 December 1982Grimsby, CAdaily high max18.5 C (65.3 F)11.3 C (20.3 F)45 years41 of 100 (Notable)
25 December 1982Grimsby, CAdaily high max16.5 C (61.7 F)8.2 C (14.8 F)44 years35 of 100 (Notable)

Climate Trend

51 complete years, 1910 to 1983
Annual mean temperature at Grimsby as warming stripes, 1910 to 1983 One stripe for each of 51 complete years at Grimsby, 1910 to 1983. Blue stripes are years cooler than the station's own mean of 8.9 C (48.0 F); red stripes are warmer. The coolest year was 1917, at 6.7 C (44.0 F), and the warmest was 1953, at 10.4 C (50.8 F). The strongest colour marks a difference of 2.3 C (4.1 F). 1910: 8.3 C, -0.6 C from the station mean1911: 9.1 C, +0.2 C from the station mean1912: 7.7 C, -1.2 C from the station mean1913: 9.4 C, +0.5 C from the station mean1914: 8.4 C, -0.5 C from the station mean1915: 8.8 C, -0.1 C from the station mean1916: 8.4 C, -0.5 C from the station mean1917: 6.7 C, -2.2 C from the station mean1922: 8.9 C, 0.0 C from the station mean1923: 8.0 C, -0.8 C from the station mean1924: 7.4 C, -1.4 C from the station mean1927: 8.7 C, -0.2 C from the station mean1938: 9.4 C, +0.5 C from the station mean1945: 8.6 C, -0.3 C from the station mean1946: 9.8 C, +0.9 C from the station mean1947: 9.1 C, +0.2 C from the station mean1948: 9.2 C, +0.3 C from the station mean1949: 10.2 C, +1.3 C from the station mean1950: 8.5 C, -0.4 C from the station mean1951: 9.0 C, +0.1 C from the station mean1952: 9.9 C, +1.0 C from the station mean1953: 10.4 C, +1.6 C from the station mean1954: 9.4 C, +0.5 C from the station mean1955: 10.1 C, +1.2 C from the station mean1956: 8.7 C, -0.2 C from the station mean1957: 9.5 C, +0.6 C from the station mean1958: 8.8 C, -0.1 C from the station mean1959: 9.6 C, +0.7 C from the station mean1960: 8.8 C, -0.1 C from the station mean1961: 9.2 C, +0.4 C from the station mean1962: 8.7 C, -0.2 C from the station mean1963: 8.7 C, -0.2 C from the station mean1964: 9.3 C, +0.4 C from the station mean1965: 8.5 C, -0.4 C from the station mean1966: 9.0 C, +0.1 C from the station mean1967: 8.7 C, -0.1 C from the station mean1968: 8.9 C, 0.0 C from the station mean1969: 9.0 C, +0.2 C from the station mean1970: 8.9 C, +0.1 C from the station mean1971: 9.2 C, +0.3 C from the station mean1972: 8.2 C, -0.7 C from the station mean1973: 9.8 C, +0.9 C from the station mean1974: 9.0 C, +0.2 C from the station mean1975: 9.7 C, +0.8 C from the station mean1976: 8.4 C, -0.5 C from the station mean1978: 7.9 C, -0.9 C from the station mean1979: 8.3 C, -0.6 C from the station mean1980: 8.2 C, -0.7 C from the station mean1981: 8.8 C, -0.1 C from the station mean1982: 8.4 C, -0.5 C from the station mean1983: 9.3 C, +0.5 C from the station mean19101920193019401950196019701980
One stripe for each of 51 complete years at Grimsby, 1910 to 1983. Blue stripes are years cooler than the station's own mean of 8.9 C (48.0 F); red stripes are warmer. The coolest year was 1917, at 6.7 C (44.0 F), and the warmest was 1953, at 10.4 C (50.8 F). The strongest colour marks a difference of 2.3 C (4.1 F).
Annual mean temperature at Grimsby as warming stripes, 1910 to 1983
YearAnnual mean temperatureDifference from the station mean
19108.3 C-0.61 C
19119.1 C+0.24 C
19127.7 C-1.16 C
19139.4 C+0.54 C
19148.4 C-0.52 C
19158.8 C-0.11 C
19168.4 C-0.49 C
19176.7 C-2.23 C
19228.9 C+0.04 C
19238.0 C-0.84 C
19247.4 C-1.44 C
19278.7 C-0.16 C
19389.4 C+0.49 C
19458.6 C-0.29 C
19469.8 C+0.87 C
19479.1 C+0.21 C
19489.2 C+0.29 C
194910.2 C+1.34 C
19508.5 C-0.40 C
19519.0 C+0.13 C
19529.9 C+1.02 C
195310.4 C+1.56 C
19549.4 C+0.49 C
195510.1 C+1.18 C
19568.7 C-0.16 C
19579.5 C+0.60 C
19588.8 C-0.13 C
19599.6 C+0.70 C
19608.8 C-0.08 C
19619.2 C+0.35 C
19628.7 C-0.19 C
19638.7 C-0.23 C
19649.3 C+0.39 C
19658.5 C-0.38 C
19669.0 C+0.10 C
19678.7 C-0.14 C
19688.9 C-0.02 C
19699.0 C+0.15 C
19708.9 C+0.06 C
19719.2 C+0.34 C
19728.2 C-0.67 C
19739.8 C+0.92 C
19749.0 C+0.15 C
19759.7 C+0.79 C
19768.4 C-0.52 C
19787.9 C-0.94 C
19798.3 C-0.59 C
19808.2 C-0.68 C
19818.8 C-0.09 C
19828.4 C-0.51 C
19839.3 C+0.46 C

The fitted trend in annual mean temperature here over 1910 to 1983 is 0.07 C (-0.01 to 0.16) per decade. The interval includes zero, so the trend is not clearly different from zero. In Fahrenheit: 0.13 F (-0.03 to 0.29) per decade. The slope is a straight line fitted to 51 complete years; the brackets give its 95 percent interval.

Fitted temperature trends per decade at Grimsby
MeasurePer decade (C)Per decade (F)PeriodComplete yearsReading
Annual mean temperature0.07 C (-0.01 to 0.16) per decade0.13 F (-0.03 to 0.29) per decade1910 to 198351Not clearly different from zero
Mean daily maximum-0.06 C (-0.15 to 0.02) per decade-0.11 F (-0.27 to 0.04) per decade1910 to 198351Not clearly different from zero
Mean daily minimum0.2 C (0.1 to 0.3) per decade0.4 F (0.2 to 0.5) per decade1910 to 198351Rise

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

1910 to 1983
Yearly extremes at Grimsby: the record and the median year
MeasureRecordYear of the recordMedian yearYears with a value
Hottest day (TXx)40.6 C (105.1 F)191134.4 C (93.9 F)63
Coldest night (TNn)-27.2 C (-17.0 F)1925-19.4 C (-2.9 F)63
Wettest day (Rx1day)122.7 mm (4.8 in)195444.5 mm (1.8 in)63
Wettest five days (Rx5day)157.2 mm (6.2 in)195071.0 mm (2.8 in)63
Longest dry spell (CDD)37 days191517 days63

Hottest day (TXx)

Hottest day (TXx) at Grimsby by year The hottest day of the year at Grimsby, 1910 to 1983. The record is 40.6 C (105.1 F) in 1911, marked on the chart; the median year is 34.4 C (93.9 F). 10203040501920194019601980Record: 40.6 C (105.1 F) in 1911
The hottest day of the year at Grimsby, 1910 to 1983. The record is 40.6 C (105.1 F) in 1911, marked on the chart; the median year is 34.4 C (93.9 F).
Hottest day (TXx) at Grimsby by year
YearHottest day (TXx)
191035.0 C (95.0 F)
191140.6 C (105.1 F)
191235.6 C (96.1 F)
191335.0 C (95.0 F)
191435.0 C (95.0 F)
191533.3 C (91.9 F)
191639.4 C (102.9 F)
191736.7 C (98.1 F)
192136.7 C (98.1 F)
192233.9 C (93.0 F)
192336.1 C (97.0 F)
192432.8 C (91.0 F)
192536.1 C (97.0 F)
192633.9 C (93.0 F)
192735.0 C (95.0 F)
192935.0 C (95.0 F)
193137.2 C (99.0 F)
193217.2 C (63.0 F)
193430.0 C (86.0 F)
193516.7 C (62.1 F)
193614.4 C (57.9 F)
193732.8 C (91.0 F)
193834.4 C (93.9 F)
193935.6 C (96.1 F)
194533.9 C (93.0 F)
194635.0 C (95.0 F)
194735.6 C (96.1 F)
194839.4 C (102.9 F)
194936.7 C (98.1 F)
195033.3 C (91.9 F)
195133.3 C (91.9 F)
195235.0 C (95.0 F)
195337.8 C (100.0 F)
195434.4 C (93.9 F)
195536.7 C (98.1 F)
195635.0 C (95.0 F)
195733.9 C (93.0 F)
195832.8 C (91.0 F)
195935.0 C (95.0 F)
196032.2 C (90.0 F)
196133.3 C (91.9 F)
196233.9 C (93.0 F)
196333.9 C (93.0 F)
196435.6 C (96.1 F)
196533.9 C (93.0 F)
196636.7 C (98.1 F)
196732.2 C (90.0 F)
196833.3 C (91.9 F)
196933.3 C (91.9 F)
197032.2 C (90.0 F)
197133.9 C (93.0 F)
197233.9 C (93.0 F)
197336.7 C (98.1 F)
197434.4 C (93.9 F)
197535.6 C (96.1 F)
197632.8 C (91.0 F)
197736.0 C (96.8 F)
197835.0 C (95.0 F)
197931.5 C (88.7 F)
198033.0 C (91.4 F)
198134.5 C (94.1 F)
198232.0 C (89.6 F)
198336.0 C (96.8 F)

Coldest night (TNn)

Coldest night (TNn) at Grimsby by year The coldest night of the year at Grimsby, 1910 to 1983. The record is -27.2 C (-17.0 F) in 1925, marked on the chart; the median year is -19.4 C (-2.9 F). -30-25-20-15-10-51920194019601980Record: -27.2 C (-17.0 F) in 1925
The coldest night of the year at Grimsby, 1910 to 1983. The record is -27.2 C (-17.0 F) in 1925, marked on the chart; the median year is -19.4 C (-2.9 F).
Coldest night (TNn) at Grimsby by year
YearColdest night (TNn)
1910-23.3 C (-9.9 F)
1911-19.4 C (-2.9 F)
1912-26.1 C (-15.0 F)
1913-18.9 C (-2.0 F)
1914-25.0 C (-13.0 F)
1915-22.2 C (-8.0 F)
1916-21.7 C (-7.1 F)
1917-23.9 C (-11.0 F)
1921-16.7 C (1.9 F)
1922-18.3 C (-0.9 F)
1923-20.0 C (-4.0 F)
1924-21.1 C (-6.0 F)
1925-27.2 C (-17.0 F)
1926-19.4 C (-2.9 F)
1927-23.9 C (-11.0 F)
1929-23.3 C (-9.9 F)
1931-12.2 C (10.0 F)
1932-13.3 C (8.1 F)
1934-15.0 C (5.0 F)
1935-21.1 C (-6.0 F)
1936-8.3 C (17.1 F)
1937-12.8 C (9.0 F)
1938-18.9 C (-2.0 F)
1939-18.9 C (-2.0 F)
1945-24.4 C (-11.9 F)
1946-17.2 C (1.0 F)
1947-16.1 C (3.0 F)
1948-21.1 C (-6.0 F)
1949-15.0 C (5.0 F)
1950-20.0 C (-4.0 F)
1951-17.8 C (0.0 F)
1952-16.1 C (3.0 F)
1953-13.3 C (8.1 F)
1954-16.7 C (1.9 F)
1955-18.9 C (-2.0 F)
1956-13.9 C (7.0 F)
1957-20.6 C (-5.1 F)
1958-19.4 C (-2.9 F)
1959-18.3 C (-0.9 F)
1960-18.3 C (-0.9 F)
1961-20.0 C (-4.0 F)
1962-18.9 C (-2.0 F)
1963-22.8 C (-9.0 F)
1964-18.9 C (-2.0 F)
1965-23.3 C (-9.9 F)
1966-20.6 C (-5.1 F)
1967-20.0 C (-4.0 F)
1968-17.8 C (0.0 F)
1969-17.8 C (0.0 F)
1970-21.1 C (-6.0 F)
1971-19.4 C (-2.9 F)
1972-20.0 C (-4.0 F)
1973-17.2 C (1.0 F)
1974-18.9 C (-2.0 F)
1975-17.8 C (0.0 F)
1976-22.2 C (-8.0 F)
1977-20.0 C (-4.0 F)
1978-17.5 C (0.5 F)
1979-23.0 C (-9.4 F)
1980-25.0 C (-13.0 F)
1981-23.5 C (-10.3 F)
1982-24.5 C (-12.1 F)
1983-17.5 C (0.5 F)

Wettest day (Rx1day)

Wettest day (Rx1day) at Grimsby by year The wettest day of the year at Grimsby, 1910 to 1983. The record is 122.7 mm (4.8 in) in 1954, marked on the chart; the median year is 44.5 mm (1.8 in). 0501001501920194019601980Record: 122.7 mm (4.8 in) in 1954
The wettest day of the year at Grimsby, 1910 to 1983. The record is 122.7 mm (4.8 in) in 1954, marked on the chart; the median year is 44.5 mm (1.8 in).
Wettest day (Rx1day) at Grimsby by year
YearWettest day (Rx1day)
191038.1 mm (1.5 in)
191140.6 mm (1.6 in)
191240.9 mm (1.6 in)
191366.5 mm (2.6 in)
191431.8 mm (1.3 in)
191565.8 mm (2.6 in)
191645.2 mm (1.8 in)
191752.1 mm (2.1 in)
192148.3 mm (1.9 in)
192282.0 mm (3.2 in)
192334.5 mm (1.4 in)
192447.0 mm (1.9 in)
192582.8 mm (3.3 in)
192640.6 mm (1.6 in)
192737.8 mm (1.5 in)
192956.4 mm (2.2 in)
193138.6 mm (1.5 in)
193238.9 mm (1.5 in)
193425.1 mm (1.0 in)
193542.7 mm (1.7 in)
193614.0 mm (0.6 in)
193736.3 mm (1.4 in)
193843.9 mm (1.7 in)
193935.6 mm (1.4 in)
194555.6 mm (2.2 in)
194627.9 mm (1.1 in)
194751.6 mm (2.0 in)
194840.1 mm (1.6 in)
194940.1 mm (1.6 in)
1950107.7 mm (4.2 in)
195159.7 mm (2.4 in)
195262.7 mm (2.5 in)
195362.7 mm (2.5 in)
1954122.7 mm (4.8 in)
195557.2 mm (2.3 in)
195663.0 mm (2.5 in)
195780.8 mm (3.2 in)
195840.6 mm (1.6 in)
195934.5 mm (1.4 in)
196031.0 mm (1.2 in)
196139.4 mm (1.6 in)
196278.7 mm (3.1 in)
196371.6 mm (2.8 in)
196466.3 mm (2.6 in)
196525.7 mm (1.0 in)
196629.7 mm (1.2 in)
196756.4 mm (2.2 in)
196875.9 mm (3.0 in)
196934.5 mm (1.4 in)
197049.5 mm (1.9 in)
197139.9 mm (1.6 in)
197252.6 mm (2.1 in)
197344.5 mm (1.8 in)
197429.2 mm (1.1 in)
197535.8 mm (1.4 in)
197653.1 mm (2.1 in)
197744.5 mm (1.8 in)
197852.8 mm (2.1 in)
197960.5 mm (2.4 in)
198031.8 mm (1.3 in)
198139.6 mm (1.6 in)
198251.2 mm (2.0 in)
198354.8 mm (2.2 in)

Wettest five days (Rx5day)

Wettest five days (Rx5day) at Grimsby by year The wettest five days of the year at Grimsby, 1910 to 1983. The record is 157.2 mm (6.2 in) in 1950, marked on the chart; the median year is 71.0 mm (2.8 in). 0501001502001920194019601980Record: 157.2 mm (6.2 in) in 1950
The wettest five days of the year at Grimsby, 1910 to 1983. The record is 157.2 mm (6.2 in) in 1950, marked on the chart; the median year is 71.0 mm (2.8 in).
Wettest five days (Rx5day) at Grimsby by year
YearWettest five days (Rx5day)
191073.7 mm (2.9 in)
191155.8 mm (2.2 in)
191261.9 mm (2.4 in)
191395.2 mm (3.7 in)
191462.5 mm (2.5 in)
191579.8 mm (3.1 in)
191685.6 mm (3.4 in)
191795.0 mm (3.7 in)
192189.8 mm (3.5 in)
192291.9 mm (3.6 in)
192352.6 mm (2.1 in)
192495.3 mm (3.8 in)
1925109.7 mm (4.3 in)
192660.5 mm (2.4 in)
192763.6 mm (2.5 in)
192977.0 mm (3.0 in)
193139.8 mm (1.6 in)
193263.0 mm (2.5 in)
193446.7 mm (1.8 in)
193545.2 mm (1.8 in)
193625.5 mm (1.0 in)
193759.7 mm (2.4 in)
193850.1 mm (2.0 in)
193962.8 mm (2.5 in)
1945110.5 mm (4.4 in)
194649.4 mm (1.9 in)
194763.7 mm (2.5 in)
194864.5 mm (2.5 in)
194953.4 mm (2.1 in)
1950157.2 mm (6.2 in)
195174.9 mm (2.9 in)
195265.4 mm (2.6 in)
195381.5 mm (3.2 in)
1954153.5 mm (6.0 in)
195594.8 mm (3.7 in)
195673.8 mm (2.9 in)
195798.1 mm (3.9 in)
195867.0 mm (2.6 in)
195973.4 mm (2.9 in)
196066.2 mm (2.6 in)
196168.8 mm (2.7 in)
196282.8 mm (3.3 in)
1963103.6 mm (4.1 in)
196483.8 mm (3.3 in)
196555.8 mm (2.2 in)
196669.9 mm (2.8 in)
196783.9 mm (3.3 in)
196883.8 mm (3.3 in)
196953.6 mm (2.1 in)
197050.6 mm (2.0 in)
197165.1 mm (2.6 in)
197296.5 mm (3.8 in)
197394.2 mm (3.7 in)
197467.9 mm (2.7 in)
197548.6 mm (1.9 in)
197698.7 mm (3.9 in)
197775.0 mm (3.0 in)
197892.0 mm (3.6 in)
197971.0 mm (2.8 in)
198054.6 mm (2.1 in)
198189.0 mm (3.5 in)
198267.8 mm (2.7 in)
198373.4 mm (2.9 in)

Longest dry spell (CDD)

Longest dry spell (CDD) at Grimsby by year The longest dry spell of the year at Grimsby, 1910 to 1983. The record is 37 days in 1915, marked on the chart; the median year is 17 days. 0102030401920194019601980Record: 37 days in 1915
The longest dry spell of the year at Grimsby, 1910 to 1983. The record is 37 days in 1915, marked on the chart; the median year is 17 days.
Longest dry spell (CDD) at Grimsby by year
YearLongest dry spell (CDD)
191021 days
191115 days
191218 days
191314 days
191418 days
191537 days
191612 days
191723 days
192115 days
192219 days
192317 days
192436 days
192512 days
192613 days
192713 days
192919 days
193112 days
193213 days
193414 days
19358 days
193618 days
193714 days
193814 days
193929 days
194518 days
194620 days
194718 days
194819 days
194919 days
195017 days
195111 days
195217 days
195315 days
195414 days
195517 days
195619 days
195723 days
195814 days
195915 days
196025 days
196117 days
196217 days
196331 days
196413 days
196518 days
196615 days
196720 days
196814 days
196930 days
197014 days
197112 days
197217 days
197325 days
197420 days
197519 days
197618 days
197716 days
197817 days
197913 days
198011 days
198112 days
198216 days
198313 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

51 years with a frost

Across 51 years with a frost, the median last spring frost at Grimsby falls on 24 April and the median first autumn frost on 26 October, which leaves a median of 183 days between them.

Fitted over all years, the growing season changes by +2.2 days per decade at this station.

Frost dates and growing season at Grimsby
MeasureMedian, all yearsEarliest periodRecent period (1953 to 1983)Recent against earliestFitted trend
Last spring frost24 Apriln/a22 Apriln/a-0.8 days per decade
First autumn frost26 Octobern/a29 Octobern/a+1.4 days per decade
Growing days183 daysn/a187 daysn/a+2.2 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

53 years, 1910 to 1983

A day with at least 47.0 mm (1.9 in) of rain is expected about once in 2 years. A day with at least 122.0 mm (4.8 in) of rain is expected about once in 100 years.

Rainfall return levels at Grimsby: the daily rain expected about once in a given number of years
Expected about once inA day with at leastNote
2 years47.0 mm (1.9 in)
5 years63.6 mm (2.5 in)
10 years75.9 mm (3.0 in)
25 years93.0 mm (3.7 in)
50 years107.0 mm (4.2 in)
100 years122.0 mm (4.8 in)Longer than the 53 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, 53 years of values from 1910 to 1983.

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: 122.7 mm (4.8 in) in 1954; 107.7 mm (4.2 in) in 1950; 82.8 mm (3.3 in) in 1925.

Station Changes

No change in the annual mean temperature of this station was found against its neighbours.

Download the Data

  • Data for Grimsby standing records by year: CSV or JSON. Field meanings are on the data page.
  • Data for Grimsby 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 2026-10-14 (14 October 2026). Records are computed by this site and are not official.

Data as of . Last revised (2026-10-14).