Grimsby Rock Chapel Weather Records (CA006133057)
Record envelope, standing records and threshold days for Grimsby Rock Chapel (CA006133057), Ontario, Canada, with 53 years of record.
Key Facts for Grimsby Rock Chapel
- Grimsby Rock Chapel (CA006133057) is a weather station in Ontario, Canada at 43.18 latitude and -79.58 longitude, 198 m (650 ft) above sea level.
- The station reports from 1914 to 1966, 53 years of record.
- 1,464 records set at Grimsby Rock Chapel still stand.
- Records are tracked for tmax, tmin, prcp, snow: an element needs 30 years of data to be eligible.
- Grimsby Rock Chapel set a daily record high minimum temperature of 5.6 C (42.1 F) on 18 March 1966.
About the Station
- Location: Ontario, Canada, 43.18 latitude, -79.58 longitude.
- Elevation: 198 m (650 ft).
- Period of record: 1914 to 1966, 53 years.
- Eligible elements: tmax, tmin, prcp, snow.
Daily Record Envelope and 2026
0 days at or beyond a record| Month | Highest record high | Lowest record low | 2026 highest maximum | 2026 lowest minimum |
|---|---|---|---|---|
| Jan | 17.8 C (64.0 F) | -27.8 C (-18.0 F) | n/a | n/a |
| Feb | 14.4 C (57.9 F) | -29.4 C (-20.9 F) | n/a | n/a |
| Mar | 25.6 C (78.1 F) | -22.8 C (-9.0 F) | n/a | n/a |
| Apr | 30.6 C (87.1 F) | -17.2 C (1.0 F) | n/a | n/a |
| May | 37.2 C (99.0 F) | -4.4 C (24.1 F) | n/a | n/a |
| Jun | 36.1 C (97.0 F) | 1.7 C (35.1 F) | n/a | n/a |
| Jul | 41.1 C (106.0 F) | 5.6 C (42.1 F) | n/a | n/a |
| Aug | 40.6 C (105.1 F) | 1.1 C (34.0 F) | n/a | n/a |
| Sep | 38.3 C (100.9 F) | -0.6 C (30.9 F) | n/a | n/a |
| Oct | 30.0 C (86.0 F) | -9.4 C (15.1 F) | n/a | n/a |
| Nov | 24.4 C (75.9 F) | -15.6 C (3.9 F) | n/a | n/a |
| Dec | 15.0 C (59.0 F) | -28.9 C (-20.0 F) | n/a | n/a |
Which Years Hold Standing Records
1,464 standing records| Year set | Standing records |
|---|---|
| 1916 | 44 |
| 1917 | 50 |
| 1918 | 50 |
| 1919 | 35 |
| 1920 | 50 |
| 1921 | 43 |
| 1922 | 15 |
| 1923 | 39 |
| 1924 | 32 |
| 1925 | 48 |
| 1926 | 29 |
| 1927 | 32 |
| 1928 | 32 |
| 1929 | 30 |
| 1930 | 40 |
| 1931 | 26 |
| 1932 | 30 |
| 1933 | 37 |
| 1934 | 41 |
| 1935 | 19 |
| 1936 | 55 |
| 1937 | 18 |
| 1938 | 22 |
| 1939 | 22 |
| 1940 | 27 |
| 1941 | 26 |
| 1942 | 37 |
| 1943 | 24 |
| 1944 | 18 |
| 1945 | 52 |
| 1946 | 29 |
| 1947 | 28 |
| 1948 | 25 |
| 1949 | 32 |
| 1950 | 32 |
| 1951 | 24 |
| 1952 | 16 |
| 1953 | 23 |
| 1954 | 16 |
| 1955 | 26 |
| 1956 | 17 |
| 1957 | 22 |
| 1958 | 18 |
| 1959 | 26 |
| 1960 | 15 |
| 1961 | 18 |
| 1962 | 33 |
| 1963 | 17 |
| 1965 | 15 |
| 1966 | 9 |
All-Time Record Progression
3 new records| Date | Kind | Detail |
|---|---|---|
| 1944-12-12 | Record daily snowfall | Record daily snowfall 61.0 cm (24.0 in) |
| 1950-08-29 | Record daily precipitation | Record daily precipitation 90.2 mm (3.6 in) |
| 1954-10-15 | Record daily precipitation | Record daily precipitation 115.3 mm (4.5 in) |
Wettest Day of Each Month
Oct: 115.3 mm (4.5 in)| Month | Record daily precipitation (mm) | Date |
|---|---|---|
| Jan | 52.1 mm (2.1 in) | 19 January 1929 |
| Feb | 40.6 mm (1.6 in) | 16 February 1954 |
| Mar | 38.1 mm (1.5 in) | 18 March 1936 |
| Apr | 41.9 mm (1.6 in) | 20 April 1943 |
| May | 68.6 mm (2.7 in) | 25 May 1953 |
| Jun | 78.0 mm (3.1 in) | 11 June 1922 |
| Jul | 72.6 mm (2.9 in) | 12 July 1962 |
| Aug | 90.2 mm (3.6 in) | 29 August 1950 |
| Sep | 77.0 mm (3.0 in) | 29 September 1924 |
| Oct | 115.3 mm (4.5 in) | 15 October 1954 |
| Nov | 45.2 mm (1.8 in) | 9 November 1962 |
| Dec | 61.0 mm (2.4 in) | 12 December 1944 |
Period of Record Coverage
1916 to 1966| Year | Days with data | Share of year | Complete |
|---|---|---|---|
| 1916 | 366 | 100% | Yes |
| 1917 | 365 | 100% | Yes |
| 1918 | 365 | 100% | Yes |
| 1919 | 364 | 100% | Yes |
| 1920 | 366 | 100% | Yes |
| 1921 | 364 | 100% | Yes |
| 1922 | 365 | 100% | Yes |
| 1923 | 364 | 100% | Yes |
| 1924 | 362 | 99% | Yes |
| 1925 | 359 | 98% | Yes |
| 1926 | 363 | 99% | Yes |
| 1927 | 364 | 100% | Yes |
| 1928 | 363 | 99% | Yes |
| 1929 | 364 | 100% | Yes |
| 1930 | 365 | 100% | Yes |
| 1931 | 365 | 100% | Yes |
| 1932 | 366 | 100% | Yes |
| 1933 | 365 | 100% | Yes |
| 1934 | 365 | 100% | Yes |
| 1935 | 365 | 100% | Yes |
| 1936 | 366 | 100% | Yes |
| 1937 | 365 | 100% | Yes |
| 1938 | 364 | 100% | Yes |
| 1939 | 365 | 100% | Yes |
| 1940 | 366 | 100% | Yes |
| 1941 | 362 | 99% | Yes |
| 1942 | 364 | 100% | Yes |
| 1943 | 365 | 100% | Yes |
| 1944 | 366 | 100% | Yes |
| 1945 | 365 | 100% | Yes |
| 1946 | 364 | 100% | Yes |
| 1947 | 365 | 100% | Yes |
| 1948 | 366 | 100% | Yes |
| 1949 | 365 | 100% | Yes |
| 1950 | 365 | 100% | Yes |
| 1951 | 364 | 100% | Yes |
| 1952 | 365 | 100% | Yes |
| 1953 | 365 | 100% | Yes |
| 1954 | 335 | 92% | Yes |
| 1955 | 365 | 100% | Yes |
| 1956 | 366 | 100% | Yes |
| 1957 | 363 | 99% | Yes |
| 1958 | 365 | 100% | Yes |
| 1959 | 365 | 100% | Yes |
| 1960 | 365 | 100% | Yes |
| 1961 | 362 | 99% | Yes |
| 1962 | 330 | 90% | Yes |
| 1963 | 167 | 46% | No |
| 1965 | 183 | 50% | No |
| 1966 | 106 | 29% | No |
Latest Records
20| Date | Station | Record | Value | Beat old record by | Old record stood | Significance |
|---|---|---|---|---|---|---|
| 18 March 1966 | Grimsby Rock Chapel, CA | daily high min | 5.6 C (42.1 F) | 3.4 C (6.1 F) | 39 years | 22 of 100 (Routine) |
| 18 March 1966 | Grimsby Rock Chapel, CA | daily high max | 20.0 C (68.0 F) | 1.1 C (2.0 F) | 20 years | 12 of 100 (Routine) |
| 10 March 1966 | Grimsby Rock Chapel, CA | daily high min (Tie) | -1.1 C (30.0 F) | tie | 40 years | 4 of 100 (Routine) |
| 5 March 1966 | Grimsby Rock Chapel, CA | daily high min (Tie) | 2.2 C (36.0 F) | tie | 20 years | 2 of 100 (Routine) |
| 11 February 1966 | Grimsby Rock Chapel, CA | daily high min | 3.3 C (37.9 F) | 3.3 C (5.9 F) | 40 years | 22 of 100 (Routine) |
| 11 February 1966 | Grimsby Rock Chapel, CA | daily high max | 5.6 C (42.1 F) | 0.6 C (1.1 F) | 44 years | 19 of 100 (Routine) |
| 10 February 1966 | Grimsby Rock Chapel, CA | daily high min | 3.9 C (39.0 F) | 3.3 C (5.9 F) | 40 years | 22 of 100 (Routine) |
| 10 February 1966 | Grimsby Rock Chapel, CA | daily high max | 8.9 C (48.0 F) | 1.7 C (3.1 F) | 40 years | 20 of 100 (Routine) |
| 29 January 1966 | Grimsby Rock Chapel, CA | daily low min | -21.7 C (-7.1 F) | 0.6 C (1.1 F) | 32 years | 14 of 100 (Routine) |
| 28 January 1966 | Grimsby Rock Chapel, CA | daily low max | -14.4 C (6.1 F) | 2.2 C (4.0 F) | 40 years | 20 of 100 (Routine) |
| 28 January 1966 | Grimsby Rock Chapel, CA | daily low min | -21.7 C (-7.1 F) | 1.1 C (2.0 F) | 40 years | 18 of 100 (Routine) |
| 22 January 1966 | Grimsby Rock Chapel, CA | daily snowfall | 7.6 cm (3.0 in) | 1.2 cm (0.5 in) | 28 years | 15 of 100 (Routine) |
| 1 January 1966 | Grimsby Rock Chapel, CA | daily high min (Tie) | 2.8 C (37.0 F) | tie | 14 years | 2 of 100 (Routine) |
| 31 December 1965 | Grimsby Rock Chapel, CA | daily high max | 13.9 C (57.0 F) | 2.2 C (4.0 F) | 28 years | 17 of 100 (Routine) |
| 30 December 1965 | Grimsby Rock Chapel, CA | daily high min | 2.8 C (37.0 F) | 1.7 C (3.1 F) | 20 years | 13 of 100 (Routine) |
| 30 December 1965 | Grimsby Rock Chapel, CA | daily high max (Tie) | 8.3 C (46.9 F) | tie | 38 years | 4 of 100 (Routine) |
| 24 December 1965 | Grimsby Rock Chapel, CA | daily high max | 9.4 C (48.9 F) | 2.2 C (4.0 F) | 34 years | 19 of 100 (Routine) |
| 24 December 1965 | Grimsby Rock Chapel, CA | daily rain | 20.3 mm (0.8 in) | 1.8 mm (0.07 in) | 24 years | 14 of 100 (Routine) |
| 14 December 1965 | Grimsby Rock Chapel, CA | daily high min (Tie) | 2.2 C (36.0 F) | tie | 44 years | 4 of 100 (Routine) |
| 11 December 1965 | Grimsby Rock Chapel, CA | daily rain | 24.6 mm (1.0 in) | 9.6 mm (0.38 in) | 6 years | 20 of 100 (Routine) |
Climate Trend
45 complete years, 1916 to 1961| Year | Annual mean temperature | Difference from the station mean |
|---|---|---|
| 1916 | 7.3 C | -0.44 C |
| 1917 | 5.5 C | -2.20 C |
| 1918 | 7.2 C | -0.48 C |
| 1919 | 8.2 C | +0.53 C |
| 1920 | 7.0 C | -0.70 C |
| 1921 | 9.3 C | +1.61 C |
| 1922 | 8.2 C | +0.46 C |
| 1923 | 7.1 C | -0.57 C |
| 1924 | 6.4 C | -1.31 C |
| 1925 | 7.0 C | -0.68 C |
| 1926 | 6.0 C | -1.74 C |
| 1927 | 7.6 C | -0.15 C |
| 1928 | 7.3 C | -0.43 C |
| 1929 | 7.0 C | -0.74 C |
| 1930 | 7.5 C | -0.20 C |
| 1931 | 8.6 C | +0.87 C |
| 1932 | 7.8 C | +0.12 C |
| 1933 | 7.9 C | +0.21 C |
| 1934 | 7.1 C | -0.62 C |
| 1935 | 7.3 C | -0.41 C |
| 1936 | 7.4 C | -0.31 C |
| 1937 | 7.8 C | +0.12 C |
| 1938 | 8.5 C | +0.75 C |
| 1939 | 8.1 C | +0.35 C |
| 1940 | 6.8 C | -0.94 C |
| 1941 | 8.7 C | +0.98 C |
| 1942 | 7.8 C | +0.06 C |
| 1943 | 6.9 C | -0.83 C |
| 1944 | 8.3 C | +0.61 C |
| 1945 | 7.1 C | -0.58 C |
| 1946 | 8.5 C | +0.84 C |
| 1947 | 7.8 C | +0.12 C |
| 1948 | 7.8 C | +0.11 C |
| 1949 | 9.0 C | +1.31 C |
| 1950 | 7.5 C | -0.19 C |
| 1951 | 7.6 C | -0.12 C |
| 1952 | 8.8 C | +1.05 C |
| 1953 | 9.6 C | +1.91 C |
| 1955 | 8.9 C | +1.17 C |
| 1956 | 7.5 C | -0.24 C |
| 1957 | 8.3 C | +0.63 C |
| 1958 | 7.2 C | -0.53 C |
| 1959 | 8.3 C | +0.59 C |
| 1960 | 7.4 C | -0.29 C |
| 1961 | 7.9 C | +0.16 C |
The annual mean temperature here has risen by 0.2 C (0.1 to 0.4) per decade over 1916 to 1961. In Fahrenheit: 0.4 F (0.1 to 0.7) per decade. The slope is a straight line fitted to 45 complete years; the brackets give its 95 percent interval.
| Measure | Per decade (C) | Per decade (F) | Period | Complete years | Reading |
|---|---|---|---|---|---|
| Annual mean temperature | 0.2 C (0.1 to 0.4) per decade | 0.4 F (0.1 to 0.7) per decade | 1916 to 1961 | 45 | Rise |
| Mean daily maximum | 0.19 C (0.00 to 0.38) per decade | 0.34 F (-0.01 to 0.68) per decade | 1916 to 1961 | 45 | Not clearly different from zero |
| Mean daily minimum | 0.3 C (0.1 to 0.5) per decade | 0.5 F (0.2 to 0.8) per decade | 1916 to 1961 | 45 | Rise |
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
1914 to 1966| Measure | Record | Year of the record | Median year | Years with a value |
|---|---|---|---|---|
| Hottest day (TXx) | 41.1 C (106.0 F) | 1936 | 34.4 C (93.9 F) | 50 |
| Coldest night (TNn) | -29.4 C (-20.9 F) | 1918 | -21.4 C (-6.5 F) | 50 |
| Wettest day (Rx1day) | 115.3 mm (4.5 in) | 1954 | 42.2 mm (1.7 in) | 52 |
| Wettest five days (Rx5day) | 163.0 mm (6.4 in) | 1954 | 63.3 mm (2.5 in) | 52 |
| Longest dry spell (CDD) | 36 days | 1924 | 18 days | 52 |
Hottest day (TXx)
| Year | Hottest day (TXx) |
|---|---|
| 1914 | n/a |
| 1915 | n/a |
| 1916 | 37.2 C (99.0 F) |
| 1917 | 36.1 C (97.0 F) |
| 1918 | 38.3 C (100.9 F) |
| 1919 | 37.2 C (99.0 F) |
| 1920 | 32.2 C (90.0 F) |
| 1921 | 37.2 C (99.0 F) |
| 1922 | 34.4 C (93.9 F) |
| 1923 | 34.4 C (93.9 F) |
| 1924 | 33.3 C (91.9 F) |
| 1925 | 35.0 C (95.0 F) |
| 1926 | 32.2 C (90.0 F) |
| 1927 | 32.2 C (90.0 F) |
| 1928 | 31.7 C (89.1 F) |
| 1929 | 33.9 C (93.0 F) |
| 1930 | 35.0 C (95.0 F) |
| 1931 | 35.0 C (95.0 F) |
| 1932 | 34.4 C (93.9 F) |
| 1933 | 36.7 C (98.1 F) |
| 1934 | 36.1 C (97.0 F) |
| 1935 | 36.1 C (97.0 F) |
| 1936 | 41.1 C (106.0 F) |
| 1937 | 34.4 C (93.9 F) |
| 1938 | 34.4 C (93.9 F) |
| 1939 | 36.7 C (98.1 F) |
| 1940 | 34.4 C (93.9 F) |
| 1941 | 39.4 C (102.9 F) |
| 1942 | 35.0 C (95.0 F) |
| 1943 | 35.6 C (96.1 F) |
| 1944 | 36.1 C (97.0 F) |
| 1945 | 32.8 C (91.0 F) |
| 1946 | 33.3 C (91.9 F) |
| 1947 | 33.9 C (93.0 F) |
| 1948 | 40.6 C (105.1 F) |
| 1949 | 38.3 C (100.9 F) |
| 1950 | 33.9 C (93.0 F) |
| 1951 | 31.7 C (89.1 F) |
| 1952 | 35.6 C (96.1 F) |
| 1953 | 38.3 C (100.9 F) |
| 1954 | 33.9 C (93.0 F) |
| 1955 | 35.6 C (96.1 F) |
| 1956 | 35.0 C (95.0 F) |
| 1957 | 36.1 C (97.0 F) |
| 1958 | 33.9 C (93.0 F) |
| 1959 | 33.9 C (93.0 F) |
| 1960 | 31.7 C (89.1 F) |
| 1961 | 31.7 C (89.1 F) |
| 1962 | 33.9 C (93.0 F) |
| 1963 | 33.3 C (91.9 F) |
| 1965 | 33.9 C (93.0 F) |
| 1966 | 20.0 C (68.0 F) |
Coldest night (TNn)
| Year | Coldest night (TNn) |
|---|---|
| 1914 | n/a |
| 1915 | n/a |
| 1916 | -22.8 C (-9.0 F) |
| 1917 | -25.0 C (-13.0 F) |
| 1918 | -29.4 C (-20.9 F) |
| 1919 | -20.0 C (-4.0 F) |
| 1920 | -22.8 C (-9.0 F) |
| 1921 | -17.8 C (0.0 F) |
| 1922 | -18.9 C (-2.0 F) |
| 1923 | -21.1 C (-6.0 F) |
| 1924 | -21.7 C (-7.1 F) |
| 1925 | -28.9 C (-20.0 F) |
| 1926 | -20.6 C (-5.1 F) |
| 1927 | -26.1 C (-15.0 F) |
| 1928 | -23.3 C (-9.9 F) |
| 1929 | -27.2 C (-17.0 F) |
| 1930 | -21.7 C (-7.1 F) |
| 1931 | -23.3 C (-9.9 F) |
| 1932 | -16.7 C (1.9 F) |
| 1933 | -23.9 C (-11.0 F) |
| 1934 | -28.9 C (-20.0 F) |
| 1935 | -22.2 C (-8.0 F) |
| 1936 | -21.1 C (-6.0 F) |
| 1937 | -13.9 C (7.0 F) |
| 1938 | -17.8 C (0.0 F) |
| 1939 | -21.1 C (-6.0 F) |
| 1940 | -21.7 C (-7.1 F) |
| 1941 | -17.2 C (1.0 F) |
| 1942 | -23.9 C (-11.0 F) |
| 1943 | -27.2 C (-17.0 F) |
| 1944 | -23.3 C (-9.9 F) |
| 1945 | -27.8 C (-18.0 F) |
| 1946 | -20.0 C (-4.0 F) |
| 1947 | -17.8 C (0.0 F) |
| 1948 | -23.3 C (-9.9 F) |
| 1949 | -16.7 C (1.9 F) |
| 1950 | -22.8 C (-9.0 F) |
| 1951 | -19.4 C (-2.9 F) |
| 1952 | -18.3 C (-0.9 F) |
| 1953 | -15.0 C (5.0 F) |
| 1954 | -19.4 C (-2.9 F) |
| 1955 | -20.6 C (-5.1 F) |
| 1956 | -15.0 C (5.0 F) |
| 1957 | -22.8 C (-9.0 F) |
| 1958 | -22.2 C (-8.0 F) |
| 1959 | -20.0 C (-4.0 F) |
| 1960 | -21.1 C (-6.0 F) |
| 1961 | -21.1 C (-6.0 F) |
| 1962 | -20.6 C (-5.1 F) |
| 1963 | -23.9 C (-11.0 F) |
| 1965 | -13.3 C (8.1 F) |
| 1966 | -23.9 C (-11.0 F) |
Wettest day (Rx1day)
| Year | Wettest day (Rx1day) |
|---|---|
| 1914 | 32.0 mm (1.3 in) |
| 1915 | 57.9 mm (2.3 in) |
| 1916 | 46.5 mm (1.8 in) |
| 1917 | 35.6 mm (1.4 in) |
| 1918 | 43.2 mm (1.7 in) |
| 1919 | 36.6 mm (1.4 in) |
| 1920 | 37.6 mm (1.5 in) |
| 1921 | 41.7 mm (1.6 in) |
| 1922 | 78.0 mm (3.1 in) |
| 1923 | 28.4 mm (1.1 in) |
| 1924 | 77.0 mm (3.0 in) |
| 1925 | 65.0 mm (2.6 in) |
| 1926 | 43.7 mm (1.7 in) |
| 1927 | 29.7 mm (1.2 in) |
| 1928 | 36.3 mm (1.4 in) |
| 1929 | 52.1 mm (2.1 in) |
| 1930 | 33.8 mm (1.3 in) |
| 1931 | 31.0 mm (1.2 in) |
| 1932 | 44.5 mm (1.8 in) |
| 1933 | 28.4 mm (1.1 in) |
| 1934 | 38.9 mm (1.5 in) |
| 1935 | 42.4 mm (1.7 in) |
| 1936 | 38.1 mm (1.5 in) |
| 1937 | 32.8 mm (1.3 in) |
| 1938 | 39.6 mm (1.6 in) |
| 1939 | 50.8 mm (2.0 in) |
| 1940 | 29.5 mm (1.2 in) |
| 1941 | 52.6 mm (2.1 in) |
| 1942 | 55.9 mm (2.2 in) |
| 1943 | 41.9 mm (1.6 in) |
| 1944 | 61.0 mm (2.4 in) |
| 1945 | 61.7 mm (2.4 in) |
| 1946 | 35.3 mm (1.4 in) |
| 1947 | 43.2 mm (1.7 in) |
| 1948 | 43.4 mm (1.7 in) |
| 1949 | 57.4 mm (2.3 in) |
| 1950 | 90.2 mm (3.6 in) |
| 1951 | 40.4 mm (1.6 in) |
| 1952 | 45.2 mm (1.8 in) |
| 1953 | 68.6 mm (2.7 in) |
| 1954 | 115.3 mm (4.5 in) |
| 1955 | 67.1 mm (2.6 in) |
| 1956 | 67.6 mm (2.7 in) |
| 1957 | 63.8 mm (2.5 in) |
| 1958 | 41.9 mm (1.6 in) |
| 1959 | 34.8 mm (1.4 in) |
| 1960 | 24.1 mm (0.9 in) |
| 1961 | 29.7 mm (1.2 in) |
| 1962 | 72.6 mm (2.9 in) |
| 1963 | 34.3 mm (1.4 in) |
| 1965 | 31.2 mm (1.2 in) |
| 1966 | 17.5 mm (0.7 in) |
Wettest five days (Rx5day)
| Year | Wettest five days (Rx5day) |
|---|---|
| 1914 | 59.6 mm (2.3 in) |
| 1915 | 65.7 mm (2.6 in) |
| 1916 | 78.0 mm (3.1 in) |
| 1917 | 72.2 mm (2.8 in) |
| 1918 | 58.4 mm (2.3 in) |
| 1919 | 53.4 mm (2.1 in) |
| 1920 | 59.9 mm (2.4 in) |
| 1921 | 84.7 mm (3.3 in) |
| 1922 | 95.3 mm (3.8 in) |
| 1923 | 50.3 mm (2.0 in) |
| 1924 | 93.3 mm (3.7 in) |
| 1925 | 93.4 mm (3.7 in) |
| 1926 | 58.4 mm (2.3 in) |
| 1927 | 78.7 mm (3.1 in) |
| 1928 | 54.0 mm (2.1 in) |
| 1929 | 76.5 mm (3.0 in) |
| 1930 | 66.9 mm (2.6 in) |
| 1931 | 40.1 mm (1.6 in) |
| 1932 | 87.7 mm (3.5 in) |
| 1933 | 56.8 mm (2.2 in) |
| 1934 | 44.5 mm (1.8 in) |
| 1935 | 56.0 mm (2.2 in) |
| 1936 | 54.2 mm (2.1 in) |
| 1937 | 58.0 mm (2.3 in) |
| 1938 | 60.4 mm (2.4 in) |
| 1939 | 54.6 mm (2.1 in) |
| 1940 | 60.7 mm (2.4 in) |
| 1941 | 61.2 mm (2.4 in) |
| 1942 | 81.8 mm (3.2 in) |
| 1943 | 52.1 mm (2.1 in) |
| 1944 | 66.8 mm (2.6 in) |
| 1945 | 119.3 mm (4.7 in) |
| 1946 | 46.5 mm (1.8 in) |
| 1947 | 59.7 mm (2.4 in) |
| 1948 | 65.3 mm (2.6 in) |
| 1949 | 61.2 mm (2.4 in) |
| 1950 | 140.7 mm (5.5 in) |
| 1951 | 66.1 mm (2.6 in) |
| 1952 | 66.5 mm (2.6 in) |
| 1953 | 88.4 mm (3.5 in) |
| 1954 | 163.0 mm (6.4 in) |
| 1955 | 88.7 mm (3.5 in) |
| 1956 | 73.9 mm (2.9 in) |
| 1957 | 82.6 mm (3.3 in) |
| 1958 | 69.3 mm (2.7 in) |
| 1959 | 69.7 mm (2.7 in) |
| 1960 | 60.7 mm (2.4 in) |
| 1961 | 49.7 mm (2.0 in) |
| 1962 | 77.5 mm (3.1 in) |
| 1963 | 48.0 mm (1.9 in) |
| 1965 | 41.6 mm (1.6 in) |
| 1966 | 39.1 mm (1.5 in) |
Longest dry spell (CDD)
| Year | Longest dry spell (CDD) |
|---|---|
| 1914 | 18 days |
| 1915 | 20 days |
| 1916 | 13 days |
| 1917 | 18 days |
| 1918 | 28 days |
| 1919 | 20 days |
| 1920 | 15 days |
| 1921 | 12 days |
| 1922 | 18 days |
| 1923 | 17 days |
| 1924 | 36 days |
| 1925 | 12 days |
| 1926 | 17 days |
| 1927 | 18 days |
| 1928 | 18 days |
| 1929 | 19 days |
| 1930 | 20 days |
| 1931 | 13 days |
| 1932 | 13 days |
| 1933 | 18 days |
| 1934 | 18 days |
| 1935 | 17 days |
| 1936 | 25 days |
| 1937 | 14 days |
| 1938 | 12 days |
| 1939 | 20 days |
| 1940 | 13 days |
| 1941 | 21 days |
| 1942 | 22 days |
| 1943 | 34 days |
| 1944 | 16 days |
| 1945 | 13 days |
| 1946 | 20 days |
| 1947 | 17 days |
| 1948 | 16 days |
| 1949 | 22 days |
| 1950 | 21 days |
| 1951 | 16 days |
| 1952 | 25 days |
| 1953 | 17 days |
| 1954 | 17 days |
| 1955 | 18 days |
| 1956 | 26 days |
| 1957 | 23 days |
| 1958 | 20 days |
| 1959 | 15 days |
| 1960 | 14 days |
| 1961 | 17 days |
| 1962 | 16 days |
| 1963 | 13 days |
| 1965 | 9 days |
| 1966 | 8 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
45 years with a frostAcross 45 years with a frost, the median last spring frost at Grimsby Rock Chapel falls on 2 May and the median first autumn frost on 14 October, which leaves a median of 169 days between them.
Fitted over all years, the growing season changes by +1.1 days per decade at this station.
| Measure | Median, all years | Earliest period | Recent period (1931 to 1961) | Recent against earliest | Fitted trend |
|---|---|---|---|---|---|
| Last spring frost | 2 May | n/a | 2 May | n/a | -0.3 days per decade |
| First autumn frost | 14 October | n/a | 15 October | n/a | +0.8 days per decade |
| Growing days | 169 days | n/a | 172 days | n/a | +1.1 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
46 years, 1914 to 1961A day with at least 42.6 mm (1.7 in) of rain is expected about once in 2 years. A day with at least 99.9 mm (3.9 in) of rain is expected about once in 100 years.
| Expected about once in | A day with at least | Note |
|---|---|---|
| 2 years | 42.6 mm (1.7 in) | |
| 5 years | 55.9 mm (2.2 in) | |
| 10 years | 65.5 mm (2.6 in) | |
| 25 years | 78.6 mm (3.1 in) | |
| 50 years | 89.0 mm (3.5 in) | Longer than the 46 years of record |
| 100 years | 99.9 mm (3.9 in) | Longer than the 46 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, 46 years of values from 1914 to 1961.
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: 90.2 mm (3.6 in) in 1950; 78.0 mm (3.1 in) in 1922; 77.0 mm (3.0 in) in 1924.
Station Changes
No change in the annual mean temperature of this station was found against its neighbours.
Download the Data
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).