Grande Prairie A Weather Records (CA003072920)
Record envelope, standing records and threshold days for Grande Prairie A (CA003072920), Alberta, Canada, with 72 years of record.
Key Facts for Grande Prairie A
- Grande Prairie A (CA003072920) is a weather station in Alberta, Canada at 55.18 latitude and -118.88 longitude, 669 m (2,195 ft) above sea level.
- The station reports from 1942 to 2013, 72 years of record.
- 1,464 records set at Grande Prairie A still stand.
- Records are tracked for tmax, tmin, prcp, snow: an element needs 30 years of data to be eligible.
- Grande Prairie A tied a daily record low minimum temperature of -36.8 C (-34.2 F) on 23 December 1983.
About the Station
- Location: Alberta, Canada, 55.18 latitude, -118.88 longitude.
- Elevation: 669 m (2,195 ft).
- Period of record: 1942 to 2013, 72 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 | 11.1 C (52.0 F) | -52.2 C (-62.0 F) | n/a | n/a |
| Feb | 11.7 C (53.1 F) | -48.3 C (-54.9 F) | n/a | n/a |
| Mar | 16.1 C (61.0 F) | -42.8 C (-45.0 F) | n/a | n/a |
| Apr | 29.2 C (84.6 F) | -35.6 C (-32.1 F) | n/a | n/a |
| May | 31.1 C (88.0 F) | -7.8 C (18.0 F) | n/a | n/a |
| Jun | 33.3 C (91.9 F) | -2.2 C (28.0 F) | n/a | n/a |
| Jul | 33.3 C (91.9 F) | 0.6 C (33.1 F) | n/a | n/a |
| Aug | 34.5 C (94.1 F) | -2.8 C (27.0 F) | n/a | n/a |
| Sep | 31.1 C (88.0 F) | -10.6 C (12.9 F) | n/a | n/a |
| Oct | 28.9 C (84.0 F) | -20.0 C (-4.0 F) | n/a | n/a |
| Nov | 22.2 C (72.0 F) | -40.6 C (-41.1 F) | n/a | n/a |
| Dec | 13.3 C (55.9 F) | -44.4 C (-47.9 F) | n/a | n/a |
Which Years Hold Standing Records
1,464 standing records| Year set | Standing records |
|---|---|
| 1942 | 39 |
| 1943 | 57 |
| 1944 | 40 |
| 1945 | 50 |
| 1946 | 19 |
| 1947 | 36 |
| 1948 | 36 |
| 1949 | 54 |
| 1950 | 64 |
| 1951 | 59 |
| 1952 | 28 |
| 1953 | 16 |
| 1954 | 56 |
| 1955 | 48 |
| 1956 | 50 |
| 1957 | 35 |
| 1958 | 23 |
| 1959 | 36 |
| 1960 | 34 |
| 1961 | 42 |
| 1962 | 17 |
| 1963 | 37 |
| 1964 | 22 |
| 1965 | 39 |
| 1966 | 27 |
| 1967 | 23 |
| 1968 | 29 |
| 1969 | 38 |
| 1970 | 30 |
| 1971 | 25 |
| 1972 | 31 |
| 1973 | 25 |
| 1974 | 21 |
| 1975 | 29 |
| 1976 | 28 |
| 1977 | 33 |
| 1978 | 31 |
| 1979 | 42 |
| 1980 | 36 |
| 1981 | 32 |
| 1982 | 29 |
| 1983 | 18 |
All-Time Record Progression
1 new records| Date | Kind | Detail |
|---|---|---|
| 1981-08-09 | Record high maximum temperature | Record high maximum temperature 34.5 C (94.1 F) |
Wettest Day of Each Month
Jun: 77.5 mm (3.1 in)| Month | Record daily precipitation (mm) | Date |
|---|---|---|
| Jan | 16.8 mm (0.7 in) | 5 January 1945 |
| Feb | 15.2 mm (0.6 in) | 14 February 1948 |
| Mar | 18.0 mm (0.7 in) | 16 March 1966 |
| Apr | 17.3 mm (0.7 in) | 28 April 1962 |
| May | 31.2 mm (1.2 in) | 31 May 1976 |
| Jun | 77.5 mm (3.1 in) | 27 June 1965 |
| Jul | 66.8 mm (2.6 in) | 14 July 1982 |
| Aug | 48.3 mm (1.9 in) | 2 August 1982 |
| Sep | 36.1 mm (1.4 in) | 13 September 1969 |
| Oct | 38.9 mm (1.5 in) | 4 October 1943 |
| Nov | 23.6 mm (0.9 in) | 22 November 1957 |
| Dec | 23.4 mm (0.9 in) | 13 December 1947 |
Period of Record Coverage
1942 to 1983| Year | Days with data | Share of year | Complete |
|---|---|---|---|
| 1942 | 275 | 75% | No |
| 1943 | 365 | 100% | Yes |
| 1944 | 366 | 100% | Yes |
| 1945 | 364 | 100% | Yes |
| 1946 | 365 | 100% | Yes |
| 1947 | 365 | 100% | Yes |
| 1948 | 366 | 100% | Yes |
| 1949 | 365 | 100% | Yes |
| 1950 | 364 | 100% | Yes |
| 1951 | 365 | 100% | Yes |
| 1952 | 364 | 99% | 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 | 364 | 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 | 365 | 100% | Yes |
| 1977 | 364 | 100% | Yes |
| 1978 | 365 | 100% | Yes |
| 1979 | 345 | 95% | Yes |
| 1980 | 365 | 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 |
|---|---|---|---|---|---|---|
| 23 December 1983 | Grande Prairie A, CA | daily low min (Tie) | -36.8 C (-34.2 F) | tie | 2 years | 1 of 100 (Routine) |
| 18 December 1983 | Grande Prairie A, CA | daily low min | -39.5 C (-39.1 F) | 0.1 C (0.2 F) | 21 years | 10 of 100 (Routine) |
| 17 December 1983 | Grande Prairie A, CA | daily low max | -29.2 C (-20.6 F) | 4.8 C (8.6 F) | 28 years | 16 of 100 (Routine) |
| 17 December 1983 | Grande Prairie A, CA | daily low min | -37.6 C (-35.7 F) | 3.2 C (5.8 F) | 20 years | 13 of 100 (Routine) |
| 7 November 1983 | Grande Prairie A, CA | daily snowfall | 3.4 cm (1.3 in) | 1.6 cm (0.6 in) | 32 years | 17 of 100 (Routine) |
| 26 October 1983 | Grande Prairie A, CA | daily high min | 3.1 C (37.6 F) | 0.9 C (1.6 F) | 40 years | 17 of 100 (Routine) |
| 30 September 1983 | Grande Prairie A, CA | daily low min | -9.0 C (15.8 F) | 0.7 C (1.3 F) | 28 years | 13 of 100 (Routine) |
| 29 September 1983 | Grande Prairie A, CA | daily low min | -8.7 C (16.3 F) | 0.4 C (0.7 F) | 21 years | 11 of 100 (Routine) |
| 28 September 1983 | Grande Prairie A, CA | daily low min | -7.7 C (18.1 F) | 2.1 C (3.8 F) | 24 years | 16 of 100 (Routine) |
| 23 September 1983 | Grande Prairie A, CA | daily high min | 9.0 C (48.2 F) | 1.2 C (2.2 F) | 16 years | 12 of 100 (Routine) |
| 19 September 1983 | Grande Prairie A, CA | daily low min | -3.9 C (25.0 F) | 1.1 C (2.0 F) | 40 years | 18 of 100 (Routine) |
| 1 September 1983 | Grande Prairie A, CA | daily high min | 13.0 C (55.4 F) | 0.2 C (0.4 F) | 36 years | 14 of 100 (Routine) |
| 26 July 1983 | Grande Prairie A, CA | daily rain | 45.6 mm (1.8 in) | 12.3 mm (0.5 in) | 32 years | 29 of 100 (Routine) |
| 20 July 1983 | Grande Prairie A, CA | daily rain | 12.4 mm (0.5 in) | 2.7 mm (0.11 in) | 10 years | 10 of 100 (Routine) |
| 1 July 1983 | Grande Prairie A, CA | daily rain | 23.4 mm (0.9 in) | 8.4 mm (0.33 in) | 6 years | 17 of 100 (Routine) |
| 30 June 1983 | Grande Prairie A, CA | daily high min | 14.0 C (57.2 F) | 0.7 C (1.3 F) | 6 years | 8 of 100 (Routine) |
| 24 June 1983 | Grande Prairie A, CA | daily rain | 26.5 mm (1.0 in) | 15.1 mm (0.6 in) | 13 years | 24 of 100 (Routine) |
| 19 June 1983 | Grande Prairie A, CA | daily rain | 42.9 mm (1.7 in) | 27.4 mm (1.1 in) | 22 years | 40 of 100 (Notable) |
| 30 May 1983 | Grande Prairie A, CA | daily high max | 29.9 C (85.8 F) | 1.0 C (1.8 F) | 10 years | 8 of 100 (Routine) |
| 30 May 1983 | Grande Prairie A, CA | daily high min | 13.6 C (56.5 F) | 1.1 C (2.0 F) | 1 year | 7 of 100 (Routine) |
Climate Trend
40 complete years, 1943 to 1983| Year | Annual mean temperature | Difference from the station mean |
|---|---|---|
| 1943 | 3.0 C | +1.74 C |
| 1944 | 3.6 C | +2.29 C |
| 1945 | 1.1 C | -0.14 C |
| 1946 | 1.3 C | +0.00 C |
| 1947 | 1.5 C | +0.26 C |
| 1948 | 0.8 C | -0.47 C |
| 1949 | 1.1 C | -0.23 C |
| 1950 | -1.2 C | -2.48 C |
| 1951 | -0.7 C | -1.99 C |
| 1952 | 1.7 C | +0.45 C |
| 1953 | 2.1 C | +0.80 C |
| 1954 | 0.5 C | -0.82 C |
| 1955 | -0.4 C | -1.69 C |
| 1956 | 1.1 C | -0.18 C |
| 1957 | 1.4 C | +0.15 C |
| 1958 | 2.4 C | +1.09 C |
| 1959 | 1.5 C | +0.21 C |
| 1960 | 2.6 C | +1.27 C |
| 1961 | 1.6 C | +0.32 C |
| 1962 | 1.7 C | +0.38 C |
| 1963 | 2.2 C | +0.87 C |
| 1964 | 1.1 C | -0.19 C |
| 1965 | 0.2 C | -1.04 C |
| 1966 | -0.3 C | -1.54 C |
| 1967 | 1.5 C | +0.26 C |
| 1968 | 0.9 C | -0.36 C |
| 1969 | 0.0 C | -1.27 C |
| 1970 | 1.3 C | +0.03 C |
| 1971 | 1.0 C | -0.29 C |
| 1972 | -0.5 C | -1.79 C |
| 1973 | 0.9 C | -0.42 C |
| 1974 | 1.1 C | -0.19 C |
| 1975 | 1.0 C | -0.25 C |
| 1976 | 2.8 C | +1.55 C |
| 1977 | 2.3 C | +1.01 C |
| 1978 | 2.2 C | +0.94 C |
| 1980 | 2.2 C | +0.88 C |
| 1981 | 3.6 C | +2.29 C |
| 1982 | -0.5 C | -1.77 C |
| 1983 | 1.5 C | +0.23 C |
The fitted trend in annual mean temperature here over 1943 to 1983 is 0.03 C (-0.28 to 0.34) per decade. The interval includes zero, so the trend is not clearly different from zero. In Fahrenheit: 0.1 F (-0.5 to 0.6) per decade. The slope is a straight line fitted to 40 complete years; the brackets give its 95 percent interval.
| Measure | Per decade (C) | Per decade (F) | Period | Complete years | Reading |
|---|---|---|---|---|---|
| Annual mean temperature | 0.03 C (-0.28 to 0.34) per decade | 0.1 F (-0.5 to 0.6) per decade | 1943 to 1983 | 40 | Not clearly different from zero |
| Mean daily maximum | -0.02 C (-0.34 to 0.29) per decade | -0.04 F (-0.61 to 0.53) per decade | 1943 to 1983 | 40 | Not clearly different from zero |
| Mean daily minimum | 0.1 C (-0.2 to 0.4) per decade | 0.2 F (-0.4 to 0.7) per decade | 1943 to 1983 | 40 | 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
1942 to 1983| Measure | Record | Year of the record | Median year | Years with a value |
|---|---|---|---|---|
| Hottest day (TXx) | 34.5 C (94.1 F) | 1981 | 31.1 C (88.0 F) | 42 |
| Coldest night (TNn) | -52.2 C (-62.0 F) | 1950 | -40.8 C (-41.5 F) | 42 |
| Wettest day (Rx1day) | 77.5 mm (3.1 in) | 1965 | 32.9 mm (1.3 in) | 42 |
| Wettest five days (Rx5day) | 103.8 mm (4.1 in) | 1982 | 51.2 mm (2.0 in) | 42 |
| Longest dry spell (CDD) | 75 days | 1946 | 25 days | 42 |
Hottest day (TXx)
| Year | Hottest day (TXx) |
|---|---|
| 1942 | 33.3 C (91.9 F) |
| 1943 | 28.9 C (84.0 F) |
| 1944 | 33.3 C (91.9 F) |
| 1945 | 34.4 C (93.9 F) |
| 1946 | 31.7 C (89.1 F) |
| 1947 | 26.7 C (80.1 F) |
| 1948 | 30.0 C (86.0 F) |
| 1949 | 32.2 C (90.0 F) |
| 1950 | 31.7 C (89.1 F) |
| 1951 | 27.8 C (82.0 F) |
| 1952 | 30.0 C (86.0 F) |
| 1953 | 29.4 C (84.9 F) |
| 1954 | 29.4 C (84.9 F) |
| 1955 | 30.6 C (87.1 F) |
| 1956 | 31.1 C (88.0 F) |
| 1957 | 27.2 C (81.0 F) |
| 1958 | 31.7 C (89.1 F) |
| 1959 | 32.8 C (91.0 F) |
| 1960 | 31.7 C (89.1 F) |
| 1961 | 31.7 C (89.1 F) |
| 1962 | 29.4 C (84.9 F) |
| 1963 | 30.0 C (86.0 F) |
| 1964 | 31.1 C (88.0 F) |
| 1965 | 31.7 C (89.1 F) |
| 1966 | 31.1 C (88.0 F) |
| 1967 | 32.2 C (90.0 F) |
| 1968 | 30.6 C (87.1 F) |
| 1969 | 32.8 C (91.0 F) |
| 1970 | 33.3 C (91.9 F) |
| 1971 | 32.2 C (90.0 F) |
| 1972 | 30.0 C (86.0 F) |
| 1973 | 31.1 C (88.0 F) |
| 1974 | 31.7 C (89.1 F) |
| 1975 | 31.1 C (88.0 F) |
| 1976 | 26.1 C (79.0 F) |
| 1977 | 29.2 C (84.6 F) |
| 1978 | 31.4 C (88.5 F) |
| 1979 | 31.3 C (88.3 F) |
| 1980 | 29.5 C (85.1 F) |
| 1981 | 34.5 C (94.1 F) |
| 1982 | 31.0 C (87.8 F) |
| 1983 | 31.0 C (87.8 F) |
Coldest night (TNn)
| Year | Coldest night (TNn) |
|---|---|
| 1942 | -34.4 C (-29.9 F) |
| 1943 | -44.4 C (-47.9 F) |
| 1944 | -33.3 C (-27.9 F) |
| 1945 | -40.0 C (-40.0 F) |
| 1946 | -39.4 C (-38.9 F) |
| 1947 | -50.0 C (-58.0 F) |
| 1948 | -40.6 C (-41.1 F) |
| 1949 | -44.4 C (-47.9 F) |
| 1950 | -52.2 C (-62.0 F) |
| 1951 | -42.8 C (-45.0 F) |
| 1952 | -45.6 C (-50.1 F) |
| 1953 | -49.4 C (-56.9 F) |
| 1954 | -45.0 C (-49.0 F) |
| 1955 | -42.2 C (-44.0 F) |
| 1956 | -45.0 C (-49.0 F) |
| 1957 | -38.3 C (-36.9 F) |
| 1958 | -38.3 C (-36.9 F) |
| 1959 | -40.0 C (-40.0 F) |
| 1960 | -36.7 C (-34.1 F) |
| 1961 | -40.0 C (-40.0 F) |
| 1962 | -37.8 C (-36.0 F) |
| 1963 | -40.6 C (-41.1 F) |
| 1964 | -38.9 C (-38.0 F) |
| 1965 | -38.3 C (-36.9 F) |
| 1966 | -43.3 C (-45.9 F) |
| 1967 | -40.0 C (-40.0 F) |
| 1968 | -40.6 C (-41.1 F) |
| 1969 | -47.2 C (-53.0 F) |
| 1970 | -41.7 C (-43.1 F) |
| 1971 | -41.1 C (-42.0 F) |
| 1972 | -45.0 C (-49.0 F) |
| 1973 | -33.9 C (-29.0 F) |
| 1974 | -46.7 C (-52.1 F) |
| 1975 | -40.0 C (-40.0 F) |
| 1976 | -45.0 C (-49.0 F) |
| 1977 | -43.1 C (-45.6 F) |
| 1978 | -39.0 C (-38.2 F) |
| 1979 | -43.2 C (-45.8 F) |
| 1980 | -45.3 C (-49.5 F) |
| 1981 | -40.6 C (-41.1 F) |
| 1982 | -44.2 C (-47.6 F) |
| 1983 | -39.7 C (-39.5 F) |
Wettest day (Rx1day)
| Year | Wettest day (Rx1day) |
|---|---|
| 1942 | 18.5 mm (0.7 in) |
| 1943 | 38.9 mm (1.5 in) |
| 1944 | 44.7 mm (1.8 in) |
| 1945 | 32.8 mm (1.3 in) |
| 1946 | 23.6 mm (0.9 in) |
| 1947 | 37.3 mm (1.5 in) |
| 1948 | 61.7 mm (2.4 in) |
| 1949 | 17.0 mm (0.7 in) |
| 1950 | 26.2 mm (1.0 in) |
| 1951 | 33.3 mm (1.3 in) |
| 1952 | 18.0 mm (0.7 in) |
| 1953 | 21.6 mm (0.9 in) |
| 1954 | 28.4 mm (1.1 in) |
| 1955 | 46.2 mm (1.8 in) |
| 1956 | 31.2 mm (1.2 in) |
| 1957 | 36.3 mm (1.4 in) |
| 1958 | 55.4 mm (2.2 in) |
| 1959 | 16.8 mm (0.7 in) |
| 1960 | 37.3 mm (1.5 in) |
| 1961 | 35.1 mm (1.4 in) |
| 1962 | 22.6 mm (0.9 in) |
| 1963 | 19.8 mm (0.8 in) |
| 1964 | 52.8 mm (2.1 in) |
| 1965 | 77.5 mm (3.1 in) |
| 1966 | 41.4 mm (1.6 in) |
| 1967 | 18.3 mm (0.7 in) |
| 1968 | 65.5 mm (2.6 in) |
| 1969 | 36.1 mm (1.4 in) |
| 1970 | 18.8 mm (0.7 in) |
| 1971 | 33.0 mm (1.3 in) |
| 1972 | 21.1 mm (0.8 in) |
| 1973 | 33.5 mm (1.3 in) |
| 1974 | 18.0 mm (0.7 in) |
| 1975 | 31.0 mm (1.2 in) |
| 1976 | 45.2 mm (1.8 in) |
| 1977 | 47.4 mm (1.9 in) |
| 1978 | 23.6 mm (0.9 in) |
| 1979 | 28.2 mm (1.1 in) |
| 1980 | 26.4 mm (1.0 in) |
| 1981 | 17.9 mm (0.7 in) |
| 1982 | 66.8 mm (2.6 in) |
| 1983 | 45.6 mm (1.8 in) |
Wettest five days (Rx5day)
| Year | Wettest five days (Rx5day) |
|---|---|
| 1942 | 31.0 mm (1.2 in) |
| 1943 | 39.7 mm (1.6 in) |
| 1944 | 73.2 mm (2.9 in) |
| 1945 | 39.4 mm (1.6 in) |
| 1946 | 27.4 mm (1.1 in) |
| 1947 | 48.6 mm (1.9 in) |
| 1948 | 71.2 mm (2.8 in) |
| 1949 | 30.9 mm (1.2 in) |
| 1950 | 53.1 mm (2.1 in) |
| 1951 | 76.5 mm (3.0 in) |
| 1952 | 39.4 mm (1.6 in) |
| 1953 | 41.6 mm (1.6 in) |
| 1954 | 49.3 mm (1.9 in) |
| 1955 | 88.5 mm (3.5 in) |
| 1956 | 49.1 mm (1.9 in) |
| 1957 | 72.6 mm (2.9 in) |
| 1958 | 84.6 mm (3.3 in) |
| 1959 | 30.3 mm (1.2 in) |
| 1960 | 84.0 mm (3.3 in) |
| 1961 | 84.4 mm (3.3 in) |
| 1962 | 41.9 mm (1.6 in) |
| 1963 | 34.1 mm (1.3 in) |
| 1964 | 99.8 mm (3.9 in) |
| 1965 | 101.3 mm (4.0 in) |
| 1966 | 66.1 mm (2.6 in) |
| 1967 | 21.6 mm (0.9 in) |
| 1968 | 74.2 mm (2.9 in) |
| 1969 | 67.1 mm (2.6 in) |
| 1970 | 18.8 mm (0.7 in) |
| 1971 | 76.0 mm (3.0 in) |
| 1972 | 37.9 mm (1.5 in) |
| 1973 | 64.7 mm (2.5 in) |
| 1974 | 38.6 mm (1.5 in) |
| 1975 | 37.9 mm (1.5 in) |
| 1976 | 80.3 mm (3.2 in) |
| 1977 | 68.3 mm (2.7 in) |
| 1978 | 33.8 mm (1.3 in) |
| 1979 | 38.6 mm (1.5 in) |
| 1980 | 55.6 mm (2.2 in) |
| 1981 | 28.3 mm (1.1 in) |
| 1982 | 103.8 mm (4.1 in) |
| 1983 | 67.0 mm (2.6 in) |
Longest dry spell (CDD)
| Year | Longest dry spell (CDD) |
|---|---|
| 1942 | 19 days |
| 1943 | 69 days |
| 1944 | 31 days |
| 1945 | 27 days |
| 1946 | 75 days |
| 1947 | 15 days |
| 1948 | 26 days |
| 1949 | 17 days |
| 1950 | 20 days |
| 1951 | 25 days |
| 1952 | 51 days |
| 1953 | 31 days |
| 1954 | 35 days |
| 1955 | 23 days |
| 1956 | 22 days |
| 1957 | 23 days |
| 1958 | 29 days |
| 1959 | 37 days |
| 1960 | 43 days |
| 1961 | 19 days |
| 1962 | 17 days |
| 1963 | 21 days |
| 1964 | 16 days |
| 1965 | 22 days |
| 1966 | 18 days |
| 1967 | 36 days |
| 1968 | 14 days |
| 1969 | 24 days |
| 1970 | 27 days |
| 1971 | 30 days |
| 1972 | 44 days |
| 1973 | 26 days |
| 1974 | 32 days |
| 1975 | 21 days |
| 1976 | 17 days |
| 1977 | 25 days |
| 1978 | 22 days |
| 1979 | 27 days |
| 1980 | 25 days |
| 1981 | 32 days |
| 1982 | 24 days |
| 1983 | 22 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
40 years with a frostAcross 40 years with a frost, the median last spring frost at Grande Prairie A falls on 16 May and the median first autumn frost on 10 September, which leaves a median of 116 days between them.
Fitted over all years, the growing season changes by +3.4 days per decade at this station.
| Measure | Median, all years | Earliest period | Recent period (1953 to 1983) | Recent against earliest | Fitted trend |
|---|---|---|---|---|---|
| Last spring frost | 16 May | n/a | 15 May | n/a | -0.7 days per decade |
| First autumn frost | 10 September | n/a | 12 September | n/a | +2.6 days per decade |
| Growing days | 116 days | n/a | 118 days | n/a | +3.4 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
41 years, 1943 to 1983A day with at least 31.8 mm (1.3 in) of rain is expected about once in 2 years. A day with at least 88.7 mm (3.5 in) of rain is expected about once in 100 years.
| Expected about once in | A day with at least | Note |
|---|---|---|
| 2 years | 31.8 mm (1.3 in) | |
| 5 years | 45.5 mm (1.8 in) | |
| 10 years | 55.2 mm (2.2 in) | |
| 25 years | 68.1 mm (2.7 in) | |
| 50 years | 78.2 mm (3.1 in) | Longer than the 41 years of record |
| 100 years | 88.7 mm (3.5 in) | Longer than the 41 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, 41 years of values from 1943 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: 77.5 mm (3.1 in) in 1965; 66.8 mm (2.6 in) in 1982; 65.5 mm (2.6 in) in 1968.
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).