Whitehorse A Weather Records (CA002101300)
Record envelope, standing records and threshold days for Whitehorse A (CA002101300), Yukon, Canada, with 84 years of record.
Key Facts for Whitehorse A
- Whitehorse A (CA002101300) is a weather station in Yukon, Canada at 60.72 latitude and -135.07 longitude, 706 m (2,316 ft) above sea level.
- The station reports from 1942 to 2025, 84 years of record.
- 1,464 records set at Whitehorse A still stand.
- Records are tracked for tmax, tmin, prcp, snow: an element needs 30 years of data to be eligible.
- Whitehorse A tied a daily record snowfall of 6.4 cm (2.5 in) on 18 December 1983.
About the Station
- Location: Yukon, Canada, 60.72 latitude, -135.07 longitude.
- Elevation: 706 m (2,316 ft).
- Period of record: 1942 to 2025, 84 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 | 9.0 C (48.2 F) | -52.2 C (-62.0 F) | n/a | n/a |
| Feb | 11.7 C (53.1 F) | -51.2 C (-60.2 F) | n/a | n/a |
| Mar | 11.7 C (53.1 F) | -40.6 C (-41.1 F) | n/a | n/a |
| Apr | 20.6 C (69.1 F) | -27.8 C (-18.0 F) | n/a | n/a |
| May | 34.1 C (93.4 F) | -11.7 C (10.9 F) | n/a | n/a |
| Jun | 34.4 C (93.9 F) | -2.8 C (27.0 F) | n/a | n/a |
| Jul | 32.8 C (91.0 F) | 0.0 C (32.0 F) | n/a | n/a |
| Aug | 30.0 C (86.0 F) | -4.4 C (24.1 F) | n/a | n/a |
| Sep | 26.7 C (80.1 F) | -19.4 C (-2.9 F) | n/a | n/a |
| Oct | 18.9 C (66.0 F) | -31.1 C (-24.0 F) | n/a | n/a |
| Nov | 11.7 C (53.1 F) | -40.6 C (-41.1 F) | n/a | n/a |
| Dec | 8.3 C (46.9 F) | -47.8 C (-54.0 F) | n/a | n/a |
Which Years Hold Standing Records
1,464 standing records| Year set | Standing records |
|---|---|
| 1942 | 38 |
| 1943 | 43 |
| 1944 | 36 |
| 1945 | 37 |
| 1946 | 25 |
| 1947 | 68 |
| 1948 | 53 |
| 1949 | 35 |
| 1950 | 30 |
| 1951 | 53 |
| 1952 | 37 |
| 1953 | 29 |
| 1954 | 33 |
| 1955 | 30 |
| 1956 | 44 |
| 1957 | 22 |
| 1958 | 57 |
| 1959 | 35 |
| 1960 | 20 |
| 1961 | 28 |
| 1962 | 22 |
| 1963 | 41 |
| 1964 | 47 |
| 1965 | 34 |
| 1966 | 25 |
| 1967 | 24 |
| 1968 | 34 |
| 1969 | 44 |
| 1970 | 26 |
| 1971 | 28 |
| 1972 | 35 |
| 1973 | 22 |
| 1974 | 33 |
| 1975 | 48 |
| 1976 | 34 |
| 1977 | 53 |
| 1978 | 16 |
| 1979 | 37 |
| 1980 | 18 |
| 1981 | 29 |
| 1982 | 35 |
| 1983 | 26 |
Wettest Day of Each Month
Aug: 30.7 mm (1.2 in)| Month | Record daily precipitation (mm) | Date |
|---|---|---|
| Jan | 9.4 mm (0.37 in) | 16 January 1952 |
| Feb | 10.4 mm (0.4 in) | 28 February 1952 |
| Mar | 10.4 mm (0.4 in) | 7 March 1962 |
| Apr | 14.2 mm (0.6 in) | 4 April 1952 |
| May | 12.4 mm (0.5 in) | 22 May 1968 |
| Jun | 30.2 mm (1.2 in) | 26 June 1961 |
| Jul | 21.1 mm (0.8 in) | 7 July 1942 |
| Aug | 30.7 mm (1.2 in) | 1 August 1948 |
| Sep | 24.6 mm (1.0 in) | 4 September 1983 |
| Oct | 23.6 mm (0.9 in) | 2 October 1970 |
| Nov | 11.4 mm (0.4 in) | 6 November 1955 |
| Dec | 18.7 mm (0.7 in) | 25 December 1980 |
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 | 365 | 100% | Yes |
| 1946 | 365 | 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 | 364 | 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 | 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 |
|---|---|---|---|---|---|---|
| 18 December 1983 | Whitehorse A, CA | daily snowfall (Tie) | 6.4 cm (2.5 in) | tie | 38 years | 3 of 100 (Routine) |
| 8 October 1983 | Whitehorse A, CA | daily low max | -4.5 C (23.9 F) | 0.1 C (0.2 F) | 24 years | 11 of 100 (Routine) |
| 28 September 1983 | Whitehorse A, CA | daily low min | -9.3 C (15.3 F) | 0.4 C (0.7 F) | 10 years | 7 of 100 (Routine) |
| 27 September 1983 | Whitehorse A, CA | monthly low min | -19.4 C (-2.9 F) | 7.7 C (13.9 F) | 11 years | 36 of 100 (Notable) |
| 26 September 1983 | Whitehorse A, CA | monthly low max | -5.4 C (22.3 F) | 3.2 C (5.8 F) | 8 years | 23 of 100 (Routine) |
| 26 September 1983 | Whitehorse A, CA | daily low min | -10.6 C (12.9 F) | 2.3 C (4.1 F) | 26 years | 17 of 100 (Routine) |
| 26 September 1983 | Whitehorse A, CA | daily snowfall | 4.8 cm (1.9 in) | 4.5 cm (1.8 in) | 10 years | 17 of 100 (Routine) |
| 26 September 1983 | Whitehorse A, CA | daily rain | 2.8 mm (0.11 in) | 0.3 mm (0.01 in) | 12 years | 7 of 100 (Routine) |
| 25 September 1983 | Whitehorse A, CA | daily low max | -0.4 C (31.3 F) | 0.4 C (0.7 F) | 26 years | 12 of 100 (Routine) |
| 4 September 1983 | Whitehorse A, CA | monthly rain | 24.6 mm (1.0 in) | 3.0 mm (0.12 in) | 26 years | 20 of 100 (Routine) |
| 2 August 1983 | Whitehorse A, CA | daily low min | 1.3 C (34.3 F) | 1.5 C (2.7 F) | 21 years | 14 of 100 (Routine) |
| 27 July 1983 | Whitehorse A, CA | daily high min | 13.3 C (55.9 F) | 0.5 C (0.9 F) | 29 years | 13 of 100 (Routine) |
| 23 July 1983 | Whitehorse A, CA | daily low min | 1.7 C (35.1 F) | 1.7 C (3.1 F) | 5 years | 11 of 100 (Routine) |
| 20 July 1983 | Whitehorse A, CA | daily low min | 3.0 C (37.4 F) | 0.3 C (0.5 F) | 8 years | 7 of 100 (Routine) |
| 5 July 1983 | Whitehorse A, CA | daily rain | 9.4 mm (0.37 in) | 0.5 mm (0.02 in) | 32 years | 14 of 100 (Routine) |
| 25 June 1983 | Whitehorse A, CA | daily high max | 27.6 C (81.7 F) | 2.0 C (3.6 F) | 0 years | 8 of 100 (Routine) |
| 24 June 1983 | Whitehorse A, CA | daily high max | 29.6 C (85.3 F) | 2.9 C (5.2 F) | 28 years | 18 of 100 (Routine) |
| 23 June 1983 | Whitehorse A, CA | daily high max | 27.4 C (81.3 F) | 0.7 C (1.3 F) | 28 years | 13 of 100 (Routine) |
| 5 June 1983 | Whitehorse A, CA | daily rain (Tie) | 4.6 mm (0.18 in) | tie | 22 years | 2 of 100 (Routine) |
| 31 May 1983 | Whitehorse A, CA | daily high min | 12.2 C (54.0 F) | 2.8 C (5.0 F) | 24 years | 19 of 100 (Routine) |
Climate Trend
41 complete years, 1943 to 1983| Year | Annual mean temperature | Difference from the station mean |
|---|---|---|
| 1943 | 0.4 C | +1.41 C |
| 1944 | 1.5 C | +2.51 C |
| 1945 | -0.6 C | +0.47 C |
| 1946 | -0.5 C | +0.57 C |
| 1947 | 0.4 C | +1.42 C |
| 1948 | -2.2 C | -1.14 C |
| 1949 | -0.8 C | +0.25 C |
| 1950 | -2.6 C | -1.56 C |
| 1951 | -2.1 C | -1.11 C |
| 1952 | -0.1 C | +0.95 C |
| 1953 | 0.0 C | +1.01 C |
| 1954 | -0.7 C | +0.30 C |
| 1955 | -2.2 C | -1.15 C |
| 1956 | -1.9 C | -0.88 C |
| 1957 | 0.6 C | +1.58 C |
| 1958 | 0.2 C | +1.27 C |
| 1959 | -1.1 C | -0.12 C |
| 1960 | 0.3 C | +1.29 C |
| 1961 | -1.8 C | -0.76 C |
| 1962 | -0.5 C | +0.51 C |
| 1963 | -0.3 C | +0.76 C |
| 1964 | -1.7 C | -0.67 C |
| 1965 | -1.3 C | -0.27 C |
| 1966 | -2.8 C | -1.73 C |
| 1967 | -1.0 C | +0.00 C |
| 1968 | -1.1 C | -0.11 C |
| 1969 | -1.2 C | -0.19 C |
| 1970 | -0.7 C | +0.35 C |
| 1971 | -2.4 C | -1.41 C |
| 1972 | -3.6 C | -2.53 C |
| 1973 | -2.9 C | -1.83 C |
| 1974 | -1.6 C | -0.59 C |
| 1975 | -3.0 C | -1.93 C |
| 1976 | 0.1 C | +1.10 C |
| 1977 | 0.0 C | +0.99 C |
| 1978 | 0.0 C | +1.01 C |
| 1979 | -1.3 C | -0.32 C |
| 1980 | -0.6 C | +0.38 C |
| 1981 | 1.2 C | +2.22 C |
| 1982 | -2.8 C | -1.73 C |
| 1983 | -1.5 C | -0.50 C |
The fitted trend in annual mean temperature here over 1943 to 1983 is -0.2 C (-0.6 to 0.1) per decade. The interval includes zero, so the trend is not clearly different from zero. In Fahrenheit: -0.4 F (-1.0 to 0.1) per decade. The slope is a straight line fitted to 41 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 (-0.6 to 0.1) per decade | -0.4 F (-1.0 to 0.1) per decade | 1943 to 1983 | 41 | Not clearly different from zero |
| Mean daily maximum | -0.1 C (-0.4 to 0.2) per decade | -0.2 F (-0.8 to 0.3) per decade | 1943 to 1983 | 41 | Not clearly different from zero |
| Mean daily minimum | -0.36 C (-0.69 to -0.02) per decade | -0.64 F (-1.25 to -0.03) per decade | 1943 to 1983 | 41 | Fall |
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) | 34.4 C (93.9 F) | 1969 | 28.9 C (84.0 F) | 42 |
| Coldest night (TNn) | -52.2 C (-62.0 F) | 1947 | -44.7 C (-48.5 F) | 42 |
| Wettest day (Rx1day) | 30.7 mm (1.2 in) | 1948 | 16.2 mm (0.6 in) | 42 |
| Wettest five days (Rx5day) | 59.0 mm (2.3 in) | 1953 | 28.0 mm (1.1 in) | 42 |
| Longest dry spell (CDD) | 58 days | 1944 | 30 days | 42 |
Hottest day (TXx)
| Year | Hottest day (TXx) |
|---|---|
| 1942 | 28.3 C (82.9 F) |
| 1943 | 26.1 C (79.0 F) |
| 1944 | 27.8 C (82.0 F) |
| 1945 | 26.7 C (80.1 F) |
| 1946 | 27.8 C (82.0 F) |
| 1947 | 30.0 C (86.0 F) |
| 1948 | 30.0 C (86.0 F) |
| 1949 | 27.2 C (81.0 F) |
| 1950 | 31.7 C (89.1 F) |
| 1951 | 32.8 C (91.0 F) |
| 1952 | 28.3 C (82.9 F) |
| 1953 | 30.0 C (86.0 F) |
| 1954 | 27.2 C (81.0 F) |
| 1955 | 28.3 C (82.9 F) |
| 1956 | 28.9 C (84.0 F) |
| 1957 | 28.9 C (84.0 F) |
| 1958 | 30.6 C (87.1 F) |
| 1959 | 26.1 C (79.0 F) |
| 1960 | 28.9 C (84.0 F) |
| 1961 | 30.0 C (86.0 F) |
| 1962 | 29.4 C (84.9 F) |
| 1963 | 27.8 C (82.0 F) |
| 1964 | 26.7 C (80.1 F) |
| 1965 | 29.4 C (84.9 F) |
| 1966 | 30.0 C (86.0 F) |
| 1967 | 27.8 C (82.0 F) |
| 1968 | 25.6 C (78.1 F) |
| 1969 | 34.4 C (93.9 F) |
| 1970 | 26.7 C (80.1 F) |
| 1971 | 30.0 C (86.0 F) |
| 1972 | 28.9 C (84.0 F) |
| 1973 | 25.0 C (77.0 F) |
| 1974 | 27.2 C (81.0 F) |
| 1975 | 28.3 C (82.9 F) |
| 1976 | 31.1 C (88.0 F) |
| 1977 | 30.0 C (86.0 F) |
| 1978 | 30.6 C (87.1 F) |
| 1979 | 27.5 C (81.5 F) |
| 1980 | 30.0 C (86.0 F) |
| 1981 | 27.0 C (80.6 F) |
| 1982 | 30.5 C (86.9 F) |
| 1983 | 34.1 C (93.4 F) |
Coldest night (TNn)
| Year | Coldest night (TNn) |
|---|---|
| 1942 | -47.8 C (-54.0 F) |
| 1943 | -49.4 C (-56.9 F) |
| 1944 | -38.9 C (-38.0 F) |
| 1945 | -40.0 C (-40.0 F) |
| 1946 | -42.8 C (-45.0 F) |
| 1947 | -52.2 C (-62.0 F) |
| 1948 | -45.6 C (-50.1 F) |
| 1949 | -45.0 C (-49.0 F) |
| 1950 | -46.7 C (-52.1 F) |
| 1951 | -43.9 C (-47.0 F) |
| 1952 | -46.7 C (-52.1 F) |
| 1953 | -45.0 C (-49.0 F) |
| 1954 | -42.2 C (-44.0 F) |
| 1955 | -45.6 C (-50.1 F) |
| 1956 | -43.3 C (-45.9 F) |
| 1957 | -41.7 C (-43.1 F) |
| 1958 | -39.4 C (-38.9 F) |
| 1959 | -43.9 C (-47.0 F) |
| 1960 | -36.1 C (-33.0 F) |
| 1961 | -44.4 C (-47.9 F) |
| 1962 | -43.3 C (-45.9 F) |
| 1963 | -43.9 C (-47.0 F) |
| 1964 | -44.4 C (-47.9 F) |
| 1965 | -46.7 C (-52.1 F) |
| 1966 | -46.7 C (-52.1 F) |
| 1967 | -40.0 C (-40.0 F) |
| 1968 | -51.2 C (-60.2 F) |
| 1969 | -46.1 C (-51.0 F) |
| 1970 | -44.4 C (-47.9 F) |
| 1971 | -46.7 C (-52.1 F) |
| 1972 | -45.0 C (-49.0 F) |
| 1973 | -41.1 C (-42.0 F) |
| 1974 | -47.2 C (-53.0 F) |
| 1975 | -49.4 C (-56.9 F) |
| 1976 | -43.9 C (-47.0 F) |
| 1977 | -46.2 C (-51.2 F) |
| 1978 | -43.9 C (-47.0 F) |
| 1979 | -45.2 C (-49.4 F) |
| 1980 | -45.0 C (-49.0 F) |
| 1981 | -42.9 C (-45.2 F) |
| 1982 | -44.0 C (-47.2 F) |
| 1983 | -45.0 C (-49.0 F) |
Wettest day (Rx1day)
| Year | Wettest day (Rx1day) |
|---|---|
| 1942 | 21.1 mm (0.8 in) |
| 1943 | 20.8 mm (0.8 in) |
| 1944 | 19.6 mm (0.8 in) |
| 1945 | 12.4 mm (0.5 in) |
| 1946 | 17.8 mm (0.7 in) |
| 1947 | 10.2 mm (0.4 in) |
| 1948 | 30.7 mm (1.2 in) |
| 1949 | 17.0 mm (0.7 in) |
| 1950 | 13.5 mm (0.5 in) |
| 1951 | 12.4 mm (0.5 in) |
| 1952 | 14.2 mm (0.6 in) |
| 1953 | 20.6 mm (0.8 in) |
| 1954 | 10.4 mm (0.4 in) |
| 1955 | 11.4 mm (0.4 in) |
| 1956 | 21.6 mm (0.9 in) |
| 1957 | 14.0 mm (0.6 in) |
| 1958 | 10.9 mm (0.4 in) |
| 1959 | 14.2 mm (0.6 in) |
| 1960 | 9.1 mm (0.36 in) |
| 1961 | 30.2 mm (1.2 in) |
| 1962 | 15.0 mm (0.6 in) |
| 1963 | 15.5 mm (0.6 in) |
| 1964 | 21.3 mm (0.8 in) |
| 1965 | 11.4 mm (0.4 in) |
| 1966 | 12.7 mm (0.5 in) |
| 1967 | 17.8 mm (0.7 in) |
| 1968 | 17.5 mm (0.7 in) |
| 1969 | 19.3 mm (0.8 in) |
| 1970 | 23.6 mm (0.9 in) |
| 1971 | 24.1 mm (0.9 in) |
| 1972 | 18.3 mm (0.7 in) |
| 1973 | 10.9 mm (0.4 in) |
| 1974 | 28.4 mm (1.1 in) |
| 1975 | 16.3 mm (0.6 in) |
| 1976 | 14.2 mm (0.6 in) |
| 1977 | 16.0 mm (0.6 in) |
| 1978 | 10.6 mm (0.4 in) |
| 1979 | 17.4 mm (0.7 in) |
| 1980 | 18.7 mm (0.7 in) |
| 1981 | 9.8 mm (0.39 in) |
| 1982 | 10.8 mm (0.4 in) |
| 1983 | 24.6 mm (1.0 in) |
Wettest five days (Rx5day)
| Year | Wettest five days (Rx5day) |
|---|---|
| 1942 | 41.7 mm (1.6 in) |
| 1943 | 39.9 mm (1.6 in) |
| 1944 | 29.2 mm (1.1 in) |
| 1945 | 21.9 mm (0.9 in) |
| 1946 | 42.2 mm (1.7 in) |
| 1947 | 16.8 mm (0.7 in) |
| 1948 | 52.6 mm (2.1 in) |
| 1949 | 43.2 mm (1.7 in) |
| 1950 | 21.1 mm (0.8 in) |
| 1951 | 19.3 mm (0.8 in) |
| 1952 | 23.9 mm (0.9 in) |
| 1953 | 59.0 mm (2.3 in) |
| 1954 | 18.0 mm (0.7 in) |
| 1955 | 19.0 mm (0.7 in) |
| 1956 | 23.4 mm (0.9 in) |
| 1957 | 23.1 mm (0.9 in) |
| 1958 | 16.3 mm (0.6 in) |
| 1959 | 24.1 mm (0.9 in) |
| 1960 | 21.6 mm (0.9 in) |
| 1961 | 45.7 mm (1.8 in) |
| 1962 | 27.4 mm (1.1 in) |
| 1963 | 39.4 mm (1.6 in) |
| 1964 | 40.8 mm (1.6 in) |
| 1965 | 23.0 mm (0.9 in) |
| 1966 | 29.0 mm (1.1 in) |
| 1967 | 23.2 mm (0.9 in) |
| 1968 | 26.2 mm (1.0 in) |
| 1969 | 29.7 mm (1.2 in) |
| 1970 | 30.8 mm (1.2 in) |
| 1971 | 41.6 mm (1.6 in) |
| 1972 | 30.7 mm (1.2 in) |
| 1973 | 16.7 mm (0.7 in) |
| 1974 | 39.7 mm (1.6 in) |
| 1975 | 39.2 mm (1.5 in) |
| 1976 | 19.8 mm (0.8 in) |
| 1977 | 36.2 mm (1.4 in) |
| 1978 | 14.4 mm (0.6 in) |
| 1979 | 34.7 mm (1.4 in) |
| 1980 | 28.5 mm (1.1 in) |
| 1981 | 20.2 mm (0.8 in) |
| 1982 | 24.5 mm (1.0 in) |
| 1983 | 39.4 mm (1.6 in) |
Longest dry spell (CDD)
| Year | Longest dry spell (CDD) |
|---|---|
| 1942 | 33 days |
| 1943 | 28 days |
| 1944 | 58 days |
| 1945 | 37 days |
| 1946 | 30 days |
| 1947 | 45 days |
| 1948 | 53 days |
| 1949 | 45 days |
| 1950 | 40 days |
| 1951 | 30 days |
| 1952 | 18 days |
| 1953 | 29 days |
| 1954 | 31 days |
| 1955 | 54 days |
| 1956 | 32 days |
| 1957 | 29 days |
| 1958 | 22 days |
| 1959 | 28 days |
| 1960 | 40 days |
| 1961 | 34 days |
| 1962 | 21 days |
| 1963 | 30 days |
| 1964 | 20 days |
| 1965 | 26 days |
| 1966 | 28 days |
| 1967 | 23 days |
| 1968 | 29 days |
| 1969 | 34 days |
| 1970 | 57 days |
| 1971 | 51 days |
| 1972 | 26 days |
| 1973 | 31 days |
| 1974 | 29 days |
| 1975 | 22 days |
| 1976 | 26 days |
| 1977 | 26 days |
| 1978 | 34 days |
| 1979 | 40 days |
| 1980 | 29 days |
| 1981 | 58 days |
| 1982 | 29 days |
| 1983 | 53 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
41 years with a frostAcross 41 years with a frost, the median last spring frost at Whitehorse A falls on 4 June and the median first autumn frost on 30 August, which leaves a median of 85 days between them.
Fitted over all years, the growing season changes by -5.2 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 | 4 June | n/a | 8 June | n/a | +2.5 days per decade |
| First autumn frost | 30 August | n/a | 29 August | n/a | -2.7 days per decade |
| Growing days | 85 days | n/a | 85 days | n/a | -5.2 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
41 years, 1943 to 1983A day with at least 15.7 mm (0.6 in) of rain is expected about once in 2 years. A day with at least 35.6 mm (1.4 in) of rain is expected about once in 100 years.
| Expected about once in | A day with at least | Note |
|---|---|---|
| 2 years | 15.7 mm (0.6 in) | |
| 5 years | 20.8 mm (0.8 in) | |
| 10 years | 24.3 mm (1.0 in) | |
| 25 years | 28.8 mm (1.1 in) | |
| 50 years | 32.2 mm (1.3 in) | Longer than the 41 years of record |
| 100 years | 35.6 mm (1.4 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: 30.7 mm (1.2 in) in 1948; 30.2 mm (1.2 in) in 1961; 28.4 mm (1.1 in) in 1974.
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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).