Fort Nelson A Weather Records (CA001192940)
Record envelope, standing records and threshold days for Fort Nelson A (CA001192940), British Columbia, Canada, with 76 years of record.
Key Facts for Fort Nelson A
- Fort Nelson A (CA001192940) is a weather station in British Columbia, Canada at 58.83 latitude and -122.60 longitude, 382 m (1,253 ft) above sea level.
- The station reports from 1937 to 2012, 76 years of record.
- 1,464 records set at Fort Nelson A still stand.
- Records are tracked for tmax, tmin, prcp, snow: an element needs 30 years of data to be eligible.
- Fort Nelson A set a daily record low maximum temperature of -31.3 C (-24.3 F) on 17 December 1983.
About the Station
- Location: British Columbia, Canada, 58.83 latitude, -122.60 longitude.
- Elevation: 382 m (1,253 ft).
- Period of record: 1937 to 2012, 76 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 | 10.7 C (51.3 F) | -51.7 C (-61.1 F) | n/a | n/a |
| Feb | 15.0 C (59.0 F) | -48.3 C (-54.9 F) | n/a | n/a |
| Mar | 17.8 C (64.0 F) | -39.4 C (-38.9 F) | n/a | n/a |
| Apr | 27.3 C (81.1 F) | -34.4 C (-29.9 F) | n/a | n/a |
| May | 32.1 C (89.8 F) | -15.0 C (5.0 F) | n/a | n/a |
| Jun | 33.9 C (93.0 F) | -1.1 C (30.0 F) | n/a | n/a |
| Jul | 36.7 C (98.1 F) | 1.1 C (34.0 F) | n/a | n/a |
| Aug | 34.4 C (93.9 F) | -3.3 C (26.1 F) | n/a | n/a |
| Sep | 32.8 C (91.0 F) | -16.7 C (1.9 F) | n/a | n/a |
| Oct | 25.6 C (78.1 F) | -27.8 C (-18.0 F) | n/a | n/a |
| Nov | 18.3 C (64.9 F) | -41.1 C (-42.0 F) | n/a | n/a |
| Dec | 9.4 C (48.9 F) | -47.8 C (-54.0 F) | n/a | n/a |
Which Years Hold Standing Records
1,464 standing records| Year set | Standing records |
|---|---|
| 1937 | 6 |
| 1938 | 36 |
| 1939 | 44 |
| 1940 | 29 |
| 1941 | 23 |
| 1942 | 26 |
| 1943 | 59 |
| 1944 | 43 |
| 1945 | 28 |
| 1946 | 23 |
| 1947 | 52 |
| 1948 | 42 |
| 1949 | 38 |
| 1950 | 37 |
| 1951 | 50 |
| 1952 | 33 |
| 1953 | 35 |
| 1954 | 51 |
| 1955 | 45 |
| 1956 | 48 |
| 1957 | 31 |
| 1958 | 13 |
| 1959 | 36 |
| 1960 | 24 |
| 1961 | 48 |
| 1962 | 18 |
| 1963 | 31 |
| 1964 | 32 |
| 1965 | 31 |
| 1966 | 31 |
| 1967 | 20 |
| 1968 | 32 |
| 1969 | 23 |
| 1970 | 24 |
| 1971 | 19 |
| 1972 | 28 |
| 1973 | 13 |
| 1974 | 20 |
| 1975 | 16 |
| 1976 | 40 |
| 1977 | 28 |
| 1978 | 13 |
| 1979 | 29 |
| 1980 | 32 |
| 1981 | 38 |
| 1982 | 31 |
| 1983 | 15 |
Wettest Day of Each Month
Aug: 80.5 mm (3.2 in)| Month | Record daily precipitation (mm) | Date |
|---|---|---|
| Jan | 18.5 mm (0.7 in) | 3 January 1960 |
| Feb | 19.6 mm (0.8 in) | 24 February 1951 |
| Mar | 21.1 mm (0.8 in) | 18 March 1952 |
| Apr | 20.3 mm (0.8 in) | 20 April 1949 |
| May | 42.0 mm (1.7 in) | 12 May 1977 |
| Jun | 52.1 mm (2.1 in) | 9 June 1945 |
| Jul | 62.0 mm (2.4 in) | 22 July 1972 |
| Aug | 80.5 mm (3.2 in) | 27 August 1964 |
| Sep | 38.1 mm (1.5 in) | 16 September 1980 |
| Oct | 35.3 mm (1.4 in) | 15 October 1964 |
| Nov | 28.4 mm (1.1 in) | 8 November 1944 |
| Dec | 13.5 mm (0.5 in) | 13 December 1963 |
Period of Record Coverage
1937 to 1983| Year | Days with data | Share of year | Complete |
|---|---|---|---|
| 1937 | 103 | 28% | No |
| 1938 | 345 | 95% | Yes |
| 1939 | 365 | 100% | Yes |
| 1940 | 335 | 92% | Yes |
| 1941 | 333 | 91% | Yes |
| 1942 | 337 | 92% | 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 | 365 | 100% | Yes |
| 1952 | 366 | 100% | Yes |
| 1953 | 365 | 100% | Yes |
| 1954 | 365 | 100% | Yes |
| 1955 | 365 | 100% | Yes |
| 1956 | 366 | 100% | Yes |
| 1957 | 365 | 100% | Yes |
| 1958 | 365 | 100% | Yes |
| 1959 | 365 | 100% | Yes |
| 1960 | 366 | 100% | Yes |
| 1961 | 365 | 100% | Yes |
| 1962 | 365 | 100% | Yes |
| 1963 | 365 | 100% | Yes |
| 1964 | 366 | 100% | Yes |
| 1965 | 365 | 100% | Yes |
| 1966 | 365 | 100% | Yes |
| 1967 | 365 | 100% | Yes |
| 1968 | 366 | 100% | Yes |
| 1969 | 365 | 100% | Yes |
| 1970 | 365 | 100% | Yes |
| 1971 | 365 | 100% | Yes |
| 1972 | 366 | 100% | Yes |
| 1973 | 365 | 100% | Yes |
| 1974 | 365 | 100% | Yes |
| 1975 | 365 | 100% | Yes |
| 1976 | 366 | 100% | Yes |
| 1977 | 365 | 100% | Yes |
| 1978 | 365 | 100% | Yes |
| 1979 | 365 | 100% | Yes |
| 1980 | 366 | 100% | Yes |
| 1981 | 365 | 100% | Yes |
| 1982 | 365 | 100% | Yes |
| 1983 | 365 | 100% | Yes |
Latest Records
20| Date | Station | Record | Value | Beat old record by | Old record stood | Significance |
|---|---|---|---|---|---|---|
| 17 December 1983 | Fort Nelson A, CA | daily low max | -31.3 C (-24.3 F) | 3.5 C (6.3 F) | 28 years | 16 of 100 (Routine) |
| 17 December 1983 | Fort Nelson A, CA | daily low min | -38.5 C (-37.3 F) | 1.3 C (2.3 F) | 26 years | 13 of 100 (Routine) |
| 18 November 1983 | Fort Nelson A, CA | daily high min | -6.5 C (20.3 F) | 1.5 C (2.7 F) | 4 years | 6 of 100 (Routine) |
| 11 October 1983 | Fort Nelson A, CA | daily high max | 19.3 C (66.7 F) | 1.5 C (2.7 F) | 38 years | 17 of 100 (Routine) |
| 19 September 1983 | Fort Nelson A, CA | daily low min (Tie) | -2.2 C (28.0 F) | tie | 44 years | 4 of 100 (Routine) |
| 18 September 1983 | Fort Nelson A, CA | daily low min | -2.2 C (28.0 F) | 0.2 C (0.4 F) | 2 years | 4 of 100 (Routine) |
| 4 September 1983 | Fort Nelson A, CA | daily rain | 23.8 mm (0.9 in) | 8.8 mm (0.35 in) | 13 years | 20 of 100 (Routine) |
| 26 July 1983 | Fort Nelson A, CA | daily rain | 26.3 mm (1.0 in) | 18.4 mm (0.7 in) | 41 years | 39 of 100 (Notable) |
| 8 July 1983 | Fort Nelson A, CA | daily low min | 4.0 C (39.2 F) | 0.4 C (0.7 F) | 40 years | 17 of 100 (Routine) |
| 7 July 1983 | Fort Nelson A, CA | daily low max | 13.6 C (56.5 F) | 2.5 C (4.5 F) | 41 years | 22 of 100 (Routine) |
| 29 June 1983 | Fort Nelson A, CA | daily high max | 29.7 C (85.5 F) | 0.5 C (0.9 F) | 0 years | 5 of 100 (Routine) |
| 27 June 1983 | Fort Nelson A, CA | daily high max (Tie) | 27.8 C (82.0 F) | tie | 0 years | 1 of 100 (Routine) |
| 31 May 1983 | Fort Nelson A, CA | monthly high min | 16.0 C (60.8 F) | 1.0 C (1.8 F) | 35 years | 26 of 100 (Routine) |
| 31 May 1983 | Fort Nelson A, CA | daily high max | 28.2 C (82.8 F) | 0.4 C (0.7 F) | 41 years | 16 of 100 (Routine) |
| 29 May 1983 | Fort Nelson A, CA | monthly high max | 32.1 C (89.8 F) | 0.4 C (0.7 F) | 34 years | 24 of 100 (Routine) |
| 22 May 1983 | Fort Nelson A, CA | daily snowfall | 11.4 cm (4.5 in) | 11.4 cm (4.5 in) | 44 years | 43 of 100 (Notable) |
| 22 May 1983 | Fort Nelson A, CA | daily low min | -1.9 C (28.6 F) | 0.2 C (0.4 F) | 33 years | 14 of 100 (Routine) |
| 16 May 1983 | Fort Nelson A, CA | daily low max | 8.3 C (46.9 F) | 1.1 C (2.0 F) | 12 years | 8 of 100 (Routine) |
| 8 May 1983 | Fort Nelson A, CA | daily snowfall | 0.6 cm (0.2 in) | 0.6 cm (0.2 in) | 44 years | 18 of 100 (Routine) |
| 7 May 1983 | Fort Nelson A, CA | daily rain | 10.4 mm (0.4 in) | 7.4 mm (0.29 in) | 41 years | 20 of 100 (Routine) |
Climate Trend
42 complete years, 1939 to 1983| Year | Annual mean temperature | Difference from the station mean |
|---|---|---|
| 1939 | -1.6 C | -0.35 C |
| 1943 | 0.2 C | +1.42 C |
| 1944 | 0.9 C | +2.19 C |
| 1945 | -1.1 C | +0.20 C |
| 1946 | -1.3 C | -0.04 C |
| 1947 | -1.0 C | +0.26 C |
| 1948 | -1.4 C | -0.18 C |
| 1949 | -0.5 C | +0.81 C |
| 1950 | -2.9 C | -1.64 C |
| 1951 | -3.0 C | -1.75 C |
| 1952 | -0.4 C | +0.83 C |
| 1953 | -0.3 C | +1.01 C |
| 1954 | -1.3 C | -0.05 C |
| 1955 | -2.7 C | -1.48 C |
| 1956 | -2.3 C | -1.00 C |
| 1957 | -1.0 C | +0.26 C |
| 1958 | -0.3 C | +0.98 C |
| 1959 | -1.6 C | -0.37 C |
| 1960 | -0.9 C | +0.38 C |
| 1961 | -2.2 C | -0.97 C |
| 1962 | -1.3 C | -0.08 C |
| 1963 | -1.4 C | -0.11 C |
| 1964 | -1.7 C | -0.47 C |
| 1965 | -1.8 C | -0.54 C |
| 1966 | -2.8 C | -1.57 C |
| 1967 | -1.1 C | +0.16 C |
| 1968 | -1.7 C | -0.42 C |
| 1969 | -1.7 C | -0.45 C |
| 1970 | -0.8 C | +0.50 C |
| 1971 | -1.8 C | -0.56 C |
| 1972 | -2.5 C | -1.28 C |
| 1973 | -1.2 C | +0.02 C |
| 1974 | -2.2 C | -0.98 C |
| 1975 | -1.6 C | -0.30 C |
| 1976 | 0.2 C | +1.44 C |
| 1977 | 0.2 C | +1.49 C |
| 1978 | -0.3 C | +0.95 C |
| 1979 | -1.1 C | +0.13 C |
| 1980 | -0.4 C | +0.87 C |
| 1981 | 0.9 C | +2.12 C |
| 1982 | -2.4 C | -1.13 C |
| 1983 | -1.5 C | -0.24 C |
The fitted trend in annual mean temperature here over 1939 to 1983 is 0.01 C (-0.24 to 0.26) per decade. The interval includes zero, so the trend is not clearly different from zero. In Fahrenheit: 0.02 F (-0.43 to 0.47) per decade. The slope is a straight line fitted to 42 complete years; the brackets give its 95 percent interval.
| Measure | Per decade (C) | Per decade (F) | Period | Complete years | Reading |
|---|---|---|---|---|---|
| Annual mean temperature | 0.01 C (-0.24 to 0.26) per decade | 0.02 F (-0.43 to 0.47) per decade | 1939 to 1983 | 42 | Not clearly different from zero |
| Mean daily maximum | 0.1 C (-0.2 to 0.3) per decade | 0.1 F (-0.3 to 0.5) per decade | 1939 to 1983 | 42 | Not clearly different from zero |
| Mean daily minimum | -0.03 C (-0.30 to 0.23) per decade | -0.1 F (-0.5 to 0.4) per decade | 1939 to 1983 | 42 | Not 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
1937 to 1983| Measure | Record | Year of the record | Median year | Years with a value |
|---|---|---|---|---|
| Hottest day (TXx) | 36.7 C (98.1 F) | 1942 | 31.7 C (89.1 F) | 47 |
| Coldest night (TNn) | -51.7 C (-61.1 F) | 1947 | -43.3 C (-45.9 F) | 47 |
| Wettest day (Rx1day) | 80.5 mm (3.2 in) | 1964 | 30.1 mm (1.2 in) | 47 |
| Wettest five days (Rx5day) | 114.6 mm (4.5 in) | 1956 | 52.5 mm (2.1 in) | 47 |
| Longest dry spell (CDD) | 69 days | 1979 | 25 days | 47 |
Hottest day (TXx)
| Year | Hottest day (TXx) |
|---|---|
| 1937 | 22.8 C (73.0 F) |
| 1938 | 32.8 C (91.0 F) |
| 1939 | 33.9 C (93.0 F) |
| 1940 | 30.0 C (86.0 F) |
| 1941 | 35.6 C (96.1 F) |
| 1942 | 36.7 C (98.1 F) |
| 1943 | 27.8 C (82.0 F) |
| 1944 | 32.8 C (91.0 F) |
| 1945 | 32.8 C (91.0 F) |
| 1946 | 30.0 C (86.0 F) |
| 1947 | 30.6 C (87.1 F) |
| 1948 | 32.2 C (90.0 F) |
| 1949 | 30.0 C (86.0 F) |
| 1950 | 33.9 C (93.0 F) |
| 1951 | 30.6 C (87.1 F) |
| 1952 | 31.1 C (88.0 F) |
| 1953 | 33.9 C (93.0 F) |
| 1954 | 29.4 C (84.9 F) |
| 1955 | 33.3 C (91.9 F) |
| 1956 | 32.2 C (90.0 F) |
| 1957 | 27.2 C (81.0 F) |
| 1958 | 31.7 C (89.1 F) |
| 1959 | 31.7 C (89.1 F) |
| 1960 | 31.1 C (88.0 F) |
| 1961 | 31.1 C (88.0 F) |
| 1962 | 30.6 C (87.1 F) |
| 1963 | 31.7 C (89.1 F) |
| 1964 | 33.3 C (91.9 F) |
| 1965 | 31.7 C (89.1 F) |
| 1966 | 31.7 C (89.1 F) |
| 1967 | 30.6 C (87.1 F) |
| 1968 | 33.9 C (93.0 F) |
| 1969 | 33.9 C (93.0 F) |
| 1970 | 32.2 C (90.0 F) |
| 1971 | 33.3 C (91.9 F) |
| 1972 | 30.0 C (86.0 F) |
| 1973 | 28.9 C (84.0 F) |
| 1974 | 28.3 C (82.9 F) |
| 1975 | 31.7 C (89.1 F) |
| 1976 | 28.3 C (82.9 F) |
| 1977 | 28.8 C (83.8 F) |
| 1978 | 29.3 C (84.7 F) |
| 1979 | 30.6 C (87.1 F) |
| 1980 | 30.8 C (87.4 F) |
| 1981 | 34.5 C (94.1 F) |
| 1982 | 33.8 C (92.8 F) |
| 1983 | 32.1 C (89.8 F) |
Coldest night (TNn)
| Year | Coldest night (TNn) |
|---|---|
| 1937 | -42.8 C (-45.0 F) |
| 1938 | -47.8 C (-54.0 F) |
| 1939 | -45.6 C (-50.1 F) |
| 1940 | -47.8 C (-54.0 F) |
| 1941 | -46.7 C (-52.1 F) |
| 1942 | -37.2 C (-35.0 F) |
| 1943 | -46.7 C (-52.1 F) |
| 1944 | -35.6 C (-32.1 F) |
| 1945 | -36.1 C (-33.0 F) |
| 1946 | -44.4 C (-47.9 F) |
| 1947 | -51.7 C (-61.1 F) |
| 1948 | -42.8 C (-45.0 F) |
| 1949 | -42.8 C (-45.0 F) |
| 1950 | -42.8 C (-45.0 F) |
| 1951 | -43.3 C (-45.9 F) |
| 1952 | -44.4 C (-47.9 F) |
| 1953 | -43.9 C (-47.0 F) |
| 1954 | -44.4 C (-47.9 F) |
| 1955 | -41.1 C (-42.0 F) |
| 1956 | -41.1 C (-42.0 F) |
| 1957 | -40.0 C (-40.0 F) |
| 1958 | -33.9 C (-29.0 F) |
| 1959 | -46.7 C (-52.1 F) |
| 1960 | -37.2 C (-35.0 F) |
| 1961 | -41.1 C (-42.0 F) |
| 1962 | -43.3 C (-45.9 F) |
| 1963 | -41.1 C (-42.0 F) |
| 1964 | -41.7 C (-43.1 F) |
| 1965 | -43.3 C (-45.9 F) |
| 1966 | -45.0 C (-49.0 F) |
| 1967 | -43.9 C (-47.0 F) |
| 1968 | -47.2 C (-53.0 F) |
| 1969 | -43.3 C (-45.9 F) |
| 1970 | -46.7 C (-52.1 F) |
| 1971 | -43.9 C (-47.0 F) |
| 1972 | -45.0 C (-49.0 F) |
| 1973 | -33.9 C (-29.0 F) |
| 1974 | -42.2 C (-44.0 F) |
| 1975 | -43.3 C (-45.9 F) |
| 1976 | -45.0 C (-49.0 F) |
| 1977 | -45.3 C (-49.5 F) |
| 1978 | -40.2 C (-40.4 F) |
| 1979 | -41.7 C (-43.1 F) |
| 1980 | -42.0 C (-43.6 F) |
| 1981 | -42.3 C (-44.1 F) |
| 1982 | -44.3 C (-47.7 F) |
| 1983 | -40.7 C (-41.3 F) |
Wettest day (Rx1day)
| Year | Wettest day (Rx1day) |
|---|---|
| 1937 | 15.2 mm (0.6 in) |
| 1938 | 20.8 mm (0.8 in) |
| 1939 | 15.0 mm (0.6 in) |
| 1940 | 22.4 mm (0.9 in) |
| 1941 | 19.6 mm (0.8 in) |
| 1942 | 33.5 mm (1.3 in) |
| 1943 | 40.1 mm (1.6 in) |
| 1944 | 28.4 mm (1.1 in) |
| 1945 | 52.1 mm (2.1 in) |
| 1946 | 35.1 mm (1.4 in) |
| 1947 | 33.3 mm (1.3 in) |
| 1948 | 19.3 mm (0.8 in) |
| 1949 | 37.8 mm (1.5 in) |
| 1950 | 13.7 mm (0.5 in) |
| 1951 | 34.5 mm (1.4 in) |
| 1952 | 21.1 mm (0.8 in) |
| 1953 | 20.8 mm (0.8 in) |
| 1954 | 16.8 mm (0.7 in) |
| 1955 | 33.0 mm (1.3 in) |
| 1956 | 47.5 mm (1.9 in) |
| 1957 | 35.3 mm (1.4 in) |
| 1958 | 19.1 mm (0.8 in) |
| 1959 | 62.7 mm (2.5 in) |
| 1960 | 37.1 mm (1.5 in) |
| 1961 | 27.9 mm (1.1 in) |
| 1962 | 37.3 mm (1.5 in) |
| 1963 | 24.6 mm (1.0 in) |
| 1964 | 80.5 mm (3.2 in) |
| 1965 | 22.6 mm (0.9 in) |
| 1966 | 30.2 mm (1.2 in) |
| 1967 | 23.6 mm (0.9 in) |
| 1968 | 23.6 mm (0.9 in) |
| 1969 | 32.8 mm (1.3 in) |
| 1970 | 20.8 mm (0.8 in) |
| 1971 | 28.7 mm (1.1 in) |
| 1972 | 62.0 mm (2.4 in) |
| 1973 | 31.0 mm (1.2 in) |
| 1974 | 31.2 mm (1.2 in) |
| 1975 | 40.9 mm (1.6 in) |
| 1976 | 45.7 mm (1.8 in) |
| 1977 | 42.0 mm (1.7 in) |
| 1978 | 25.6 mm (1.0 in) |
| 1979 | 30.1 mm (1.2 in) |
| 1980 | 39.8 mm (1.6 in) |
| 1981 | 23.6 mm (0.9 in) |
| 1982 | 28.6 mm (1.1 in) |
| 1983 | 26.3 mm (1.0 in) |
Wettest five days (Rx5day)
| Year | Wettest five days (Rx5day) |
|---|---|
| 1937 | 21.5 mm (0.8 in) |
| 1938 | 56.7 mm (2.2 in) |
| 1939 | 34.2 mm (1.3 in) |
| 1940 | 35.9 mm (1.4 in) |
| 1941 | 50.7 mm (2.0 in) |
| 1942 | 56.7 mm (2.2 in) |
| 1943 | 83.1 mm (3.3 in) |
| 1944 | 60.9 mm (2.4 in) |
| 1945 | 56.0 mm (2.2 in) |
| 1946 | 38.4 mm (1.5 in) |
| 1947 | 43.6 mm (1.7 in) |
| 1948 | 47.0 mm (1.9 in) |
| 1949 | 70.3 mm (2.8 in) |
| 1950 | 30.1 mm (1.2 in) |
| 1951 | 39.1 mm (1.5 in) |
| 1952 | 43.7 mm (1.7 in) |
| 1953 | 51.3 mm (2.0 in) |
| 1954 | 46.3 mm (1.8 in) |
| 1955 | 73.1 mm (2.9 in) |
| 1956 | 114.6 mm (4.5 in) |
| 1957 | 55.8 mm (2.2 in) |
| 1958 | 30.1 mm (1.2 in) |
| 1959 | 107.7 mm (4.2 in) |
| 1960 | 70.1 mm (2.8 in) |
| 1961 | 65.5 mm (2.6 in) |
| 1962 | 72.4 mm (2.9 in) |
| 1963 | 54.3 mm (2.1 in) |
| 1964 | 100.1 mm (3.9 in) |
| 1965 | 31.8 mm (1.3 in) |
| 1966 | 45.7 mm (1.8 in) |
| 1967 | 34.8 mm (1.4 in) |
| 1968 | 64.2 mm (2.5 in) |
| 1969 | 59.7 mm (2.4 in) |
| 1970 | 37.6 mm (1.5 in) |
| 1971 | 56.9 mm (2.2 in) |
| 1972 | 93.2 mm (3.7 in) |
| 1973 | 82.3 mm (3.2 in) |
| 1974 | 41.1 mm (1.6 in) |
| 1975 | 73.6 mm (2.9 in) |
| 1976 | 83.2 mm (3.3 in) |
| 1977 | 66.0 mm (2.6 in) |
| 1978 | 46.9 mm (1.8 in) |
| 1979 | 47.4 mm (1.9 in) |
| 1980 | 52.5 mm (2.1 in) |
| 1981 | 50.8 mm (2.0 in) |
| 1982 | 47.7 mm (1.9 in) |
| 1983 | 52.4 mm (2.1 in) |
Longest dry spell (CDD)
| Year | Longest dry spell (CDD) |
|---|---|
| 1937 | 18 days |
| 1938 | 24 days |
| 1939 | 29 days |
| 1940 | 34 days |
| 1941 | 37 days |
| 1942 | 29 days |
| 1943 | 21 days |
| 1944 | 24 days |
| 1945 | 22 days |
| 1946 | 27 days |
| 1947 | 26 days |
| 1948 | 24 days |
| 1949 | 15 days |
| 1950 | 27 days |
| 1951 | 15 days |
| 1952 | 27 days |
| 1953 | 29 days |
| 1954 | 29 days |
| 1955 | 33 days |
| 1956 | 37 days |
| 1957 | 24 days |
| 1958 | 19 days |
| 1959 | 25 days |
| 1960 | 23 days |
| 1961 | 21 days |
| 1962 | 31 days |
| 1963 | 49 days |
| 1964 | 22 days |
| 1965 | 23 days |
| 1966 | 17 days |
| 1967 | 28 days |
| 1968 | 30 days |
| 1969 | 27 days |
| 1970 | 25 days |
| 1971 | 23 days |
| 1972 | 28 days |
| 1973 | 33 days |
| 1974 | 21 days |
| 1975 | 25 days |
| 1976 | 25 days |
| 1977 | 22 days |
| 1978 | 25 days |
| 1979 | 69 days |
| 1980 | 33 days |
| 1981 | 42 days |
| 1982 | 19 days |
| 1983 | 20 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
42 years with a frostAcross 42 years with a frost, the median last spring frost at Fort Nelson A falls on 24 May and the median first autumn frost on 9 September, which leaves a median of 110 days between them.
Fitted over all years, the growing season changes by +4.5 days per decade at this station.
| Measure | Median, all years | Earliest period | Recent period (1954 to 1983) | Recent against earliest | Fitted trend |
|---|---|---|---|---|---|
| Last spring frost | 24 May | n/a | 24 May | n/a | -1.0 days per decade |
| First autumn frost | 9 September | n/a | 10 September | n/a | +3.5 days per decade |
| Growing days | 110 days | n/a | 112 days | n/a | +4.5 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, 1938 to 1983A day with at least 29.2 mm (1.1 in) of rain is expected about once in 2 years. A day with at least 79.6 mm (3.1 in) of rain is expected about once in 100 years.
| Expected about once in | A day with at least | Note |
|---|---|---|
| 2 years | 29.2 mm (1.1 in) | |
| 5 years | 40.5 mm (1.6 in) | |
| 10 years | 48.8 mm (1.9 in) | |
| 25 years | 60.3 mm (2.4 in) | |
| 50 years | 69.6 mm (2.7 in) | Longer than the 46 years of record |
| 100 years | 79.6 mm (3.1 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 1938 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: 80.5 mm (3.2 in) in 1964; 62.7 mm (2.5 in) in 1959; 62.0 mm (2.4 in) in 1972.
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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).