Whalen Dam (Usbr) Weather Records (USC00489604)
Record envelope, standing records and threshold days for Whalen Dam (Usbr) (USC00489604), Wyoming, United States, with 78 years of record.
Key Facts for Whalen Dam (Usbr)
- Whalen Dam (Usbr) (USC00489604) is a weather station in Wyoming, United States at 42.25 latitude and -104.63 longitude, 1,309 m (4,294 ft) above sea level.
- The station reports from 1949 to 2026, 78 years of record.
- 1,464 records set at Whalen Dam (Usbr) still stand.
- Records are tracked for tmax, tmin, prcp, snow, snwd: an element needs 30 years of data to be eligible.
- Whalen Dam (Usbr) set a daily record high minimum temperature of 18.3 C (64.9 F) on 29 August 2026 (provisional).
Provisional Records
Records set in the last 60 days are provisional until they clear the revision window.
About the Station
- Location: Wyoming, United States, 42.25 latitude, -104.63 longitude.
- Elevation: 1,309 m (4,294 ft).
- Period of record: 1949 to 2026, 78 years.
- Eligible elements: tmax, tmin, prcp, snow, snwd.
Daily Record Envelope and 2026
16 days at or beyond a record| Month | Highest record high | Lowest record low | 2026 highest maximum | 2026 lowest minimum |
|---|---|---|---|---|
| Jan | 21.7 C (71.1 F) | -37.2 C (-35.0 F) | 15.6 C (60.1 F) | -17.8 C (0.0 F) |
| Feb | 23.9 C (75.0 F) | -35.6 C (-32.1 F) | n/a | n/a |
| Mar | 31.1 C (88.0 F) | -28.9 C (-20.0 F) | 31.1 C (88.0 F) | -13.3 C (8.1 F) |
| Apr | 31.7 C (89.1 F) | -23.3 C (-9.9 F) | 29.4 C (84.9 F) | -5.6 C (21.9 F) |
| May | 35.6 C (96.1 F) | -7.2 C (19.0 F) | 33.3 C (91.9 F) | -2.8 C (27.0 F) |
| Jun | 45.6 C (114.1 F) | -6.1 C (21.0 F) | 36.1 C (97.0 F) | 5.6 C (42.1 F) |
| Jul | 42.2 C (108.0 F) | 2.2 C (36.0 F) | 40.6 C (105.1 F) | 11.7 C (53.1 F) |
| Aug | 41.1 C (106.0 F) | 1.1 C (34.0 F) | 40.0 C (104.0 F) | 10.0 C (50.0 F) |
| Sep | 38.9 C (102.0 F) | -10.0 C (14.0 F) | 26.7 C (80.1 F) | 5.6 C (42.1 F) |
| Oct | 32.8 C (91.0 F) | -23.3 C (-9.9 F) | n/a | n/a |
| Nov | 26.7 C (80.1 F) | -27.2 C (-17.0 F) | n/a | n/a |
| Dec | 22.2 C (72.0 F) | -41.7 C (-43.1 F) | n/a | n/a |
Which Years Hold Standing Records
1,464 standing records| Year set | Standing records |
|---|---|
| 1949 | 7 |
| 1950 | 26 |
| 1951 | 33 |
| 1952 | 25 |
| 1953 | 30 |
| 1954 | 46 |
| 1955 | 27 |
| 1956 | 25 |
| 1957 | 21 |
| 1958 | 24 |
| 1959 | 31 |
| 1960 | 25 |
| 1961 | 15 |
| 1962 | 35 |
| 1963 | 36 |
| 1964 | 32 |
| 1965 | 33 |
| 1966 | 30 |
| 1967 | 23 |
| 1968 | 24 |
| 1969 | 25 |
| 1970 | 17 |
| 1971 | 19 |
| 1972 | 35 |
| 1973 | 17 |
| 1974 | 24 |
| 1975 | 23 |
| 1976 | 16 |
| 1977 | 20 |
| 1978 | 19 |
| 1979 | 20 |
| 1980 | 48 |
| 1981 | 30 |
| 1982 | 23 |
| 1983 | 34 |
| 1984 | 14 |
| 1985 | 27 |
| 1986 | 26 |
| 1987 | 34 |
| 1988 | 47 |
| 1989 | 44 |
| 1990 | 28 |
| 1991 | 17 |
| 2012 | 33 |
| 2013 | 19 |
| 2014 | 24 |
| 2015 | 23 |
| 2016 | 17 |
| 2017 | 9 |
| 2018 | 14 |
| 2019 | 16 |
| 2020 | 34 |
| 2021 | 30 |
| 2022 | 15 |
| 2023 | 10 |
| 2024 | 10 |
| 2025 | 32 |
| 2026 | 23 |
All-Time Record Progression
9 new records| Date | Kind | Detail |
|---|---|---|
| 1980-08-02 | Record high minimum temperature | Record high minimum temperature 23.3 C (73.9 F) |
| 1980-08-06 | Record high minimum temperature | Record high minimum temperature 23.9 C (75.0 F) |
| 1980-08-11 | Record high minimum temperature | Record high minimum temperature 25.6 C (78.1 F) |
| 1980-09-18 | Record high minimum temperature | Record high minimum temperature 26.1 C (79.0 F) |
| 1983-12-22 | Record low maximum temperature | Record low maximum temperature -21.7 C (-7.1 F) |
| 1988-06-24 | Record high maximum temperature | Record high maximum temperature 45.6 C (114.1 F) |
| 1989-02-03 | Record low maximum temperature | Record low maximum temperature -25.6 C (-14.1 F) |
| 1989-12-22 | Record low minimum temperature | Record low minimum temperature -41.7 C (-43.1 F) |
| 1990-12-21 | Record low maximum temperature | Record low maximum temperature -27.2 C (-17.0 F) |
Wettest Day of Each Month
Jun: 97.8 mm (3.9 in)| Month | Record daily precipitation (mm) | Date |
|---|---|---|
| Jan | 10.9 mm (0.4 in) | 5 January 1955 |
| Feb | 22.4 mm (0.9 in) | 23 February 2017 |
| Mar | 36.8 mm (1.4 in) | 6 March 1990 |
| Apr | 59.7 mm (2.4 in) | 20 April 1984 |
| May | 71.1 mm (2.8 in) | 16 May 1991 |
| Jun | 97.8 mm (3.9 in) | 10 June 1965 |
| Jul | 61.0 mm (2.4 in) | 15 July 1967 |
| Aug | 51.8 mm (2.0 in) | 7 August 2016 |
| Sep | 40.1 mm (1.6 in) | 10 September 1973 |
| Oct | 30.2 mm (1.2 in) | 6 October 1970 |
| Nov | 17.0 mm (0.7 in) | 2 November 1967 |
| Dec | 16.0 mm (0.6 in) | 5 December 1954 |
Period of Record Coverage
1949 to 2026| Year | Days with data | Share of year | Complete |
|---|---|---|---|
| 1949 | 259 | 71% | No |
| 1950 | 358 | 98% | Yes |
| 1951 | 364 | 100% | Yes |
| 1952 | 334 | 91% | Yes |
| 1953 | 363 | 99% | Yes |
| 1954 | 364 | 100% | Yes |
| 1955 | 364 | 100% | Yes |
| 1956 | 364 | 99% | Yes |
| 1957 | 365 | 100% | Yes |
| 1958 | 364 | 100% | Yes |
| 1959 | 364 | 100% | Yes |
| 1960 | 365 | 100% | Yes |
| 1961 | 364 | 100% | Yes |
| 1962 | 365 | 100% | Yes |
| 1963 | 363 | 99% | Yes |
| 1964 | 366 | 100% | Yes |
| 1965 | 365 | 100% | Yes |
| 1966 | 364 | 100% | Yes |
| 1967 | 363 | 99% | Yes |
| 1968 | 365 | 100% | Yes |
| 1969 | 365 | 100% | Yes |
| 1970 | 361 | 99% | Yes |
| 1971 | 365 | 100% | Yes |
| 1972 | 366 | 100% | Yes |
| 1973 | 329 | 90% | Yes |
| 1974 | 363 | 99% | Yes |
| 1975 | 365 | 100% | Yes |
| 1976 | 364 | 99% | Yes |
| 1977 | 362 | 99% | Yes |
| 1978 | 364 | 100% | Yes |
| 1979 | 328 | 90% | No |
| 1980 | 365 | 100% | Yes |
| 1981 | 364 | 100% | Yes |
| 1982 | 357 | 98% | Yes |
| 1983 | 358 | 98% | Yes |
| 1984 | 358 | 98% | Yes |
| 1985 | 355 | 97% | Yes |
| 1986 | 355 | 97% | Yes |
| 1987 | 358 | 98% | Yes |
| 1988 | 362 | 99% | Yes |
| 1989 | 364 | 100% | Yes |
| 1990 | 360 | 99% | Yes |
| 1991 | 269 | 74% | No |
| 2012 | 335 | 92% | Yes |
| 2013 | 365 | 100% | Yes |
| 2014 | 365 | 100% | Yes |
| 2015 | 364 | 100% | Yes |
| 2016 | 364 | 99% | Yes |
| 2017 | 304 | 83% | No |
| 2018 | 304 | 83% | No |
| 2019 | 365 | 100% | Yes |
| 2020 | 366 | 100% | Yes |
| 2021 | 363 | 99% | Yes |
| 2022 | 361 | 99% | Yes |
| 2023 | 150 | 41% | No |
| 2024 | 212 | 58% | No |
| 2025 | 350 | 96% | Yes |
| 2026 | 215 | 59% | No |
Latest Records
20| Date | Station | Record | Value | Beat old record by | Old record stood | Significance |
|---|---|---|---|---|---|---|
| 29 August 2026 | Whalen Dam (Usbr), US | daily high min (Provisional) | 18.3 C (64.9 F) | 3.3 C (5.9 F) | 44 years | 30 of 100 (Routine) |
| 24 August 2026 | Whalen Dam (Usbr), US | daily high min (Tie, Provisional) | 18.3 C (64.9 F) | tie | 45 years | 5 of 100 (Routine) |
| 23 August 2026 | Whalen Dam (Usbr), US | daily high min (Provisional) | 18.3 C (64.9 F) | 1.1 C (2.0 F) | 12 years | 13 of 100 (Routine) |
| 18 August 2026 | Whalen Dam (Usbr), US | daily rain (Provisional) | 7.1 mm (0.28 in) | 2.3 mm (0.09 in) | 4 years | 12 of 100 (Routine) |
| 13 August 2026 | Whalen Dam (Usbr), US | daily low max | 20.0 C (68.0 F) | 4.4 C (7.9 F) | 67 years | 37 of 100 (Notable) |
| 13 August 2026 | Whalen Dam (Usbr), US | daily rain | 8.1 mm (0.32 in) | 0.2 mm (0.01 in) | 4 years | 8 of 100 (Routine) |
| 9 August 2026 | Whalen Dam (Usbr), US | daily high min | 18.9 C (66.0 F) | 1.1 C (2.0 F) | 47 years | 24 of 100 (Routine) |
| 2 August 2026 | Whalen Dam (Usbr), US | daily high max | 40.0 C (104.0 F) | 1.1 C (2.0 F) | 39 years | 20 of 100 (Routine) |
| 29 July 2026 | Whalen Dam (Usbr), US | daily rain | 10.7 mm (0.4 in) | 1.6 mm (0.06 in) | 72 years | 20 of 100 (Routine) |
| 28 July 2026 | Whalen Dam (Usbr), US | daily high min | 20.0 C (68.0 F) | 0.6 C (1.1 F) | 65 years | 28 of 100 (Routine) |
| 27 July 2026 | Whalen Dam (Usbr), US | daily high min | 20.6 C (69.1 F) | 2.8 C (5.0 F) | 72 years | 38 of 100 (Notable) |
| 26 July 2026 | Whalen Dam (Usbr), US | daily high max | 40.6 C (105.1 F) | 1.2 C (2.2 F) | 63 years | 28 of 100 (Routine) |
| 25 July 2026 | Whalen Dam (Usbr), US | daily high max | 40.6 C (105.1 F) | 2.8 C (5.0 F) | 73 years | 36 of 100 (Notable) |
| 20 July 2026 | Whalen Dam (Usbr), US | daily high max | 39.4 C (102.9 F) | 0.5 C (0.9 F) | 43 years | 20 of 100 (Routine) |
| 16 July 2026 | Whalen Dam (Usbr), US | daily high min (Tie) | 18.9 C (66.0 F) | tie | 47 years | 5 of 100 (Routine) |
| 25 June 2026 | Whalen Dam (Usbr), US | daily low max (Tie) | 18.9 C (66.0 F) | tie | 57 years | 6 of 100 (Routine) |
| 7 June 2026 | Whalen Dam (Usbr), US | daily high min | 17.2 C (63.0 F) | 2.2 C (4.0 F) | 4 years | 14 of 100 (Routine) |
| 7 June 2026 | Whalen Dam (Usbr), US | daily high max (Tie) | 35.6 C (96.1 F) | tie | 48 years | 5 of 100 (Routine) |
| 29 May 2026 | Whalen Dam (Usbr), US | daily high min | 13.3 C (55.9 F) | 0.5 C (0.9 F) | 64 years | 27 of 100 (Routine) |
| 26 May 2026 | Whalen Dam (Usbr), US | daily high min | 13.9 C (57.0 F) | 2.8 C (5.0 F) | 59 years | 31 of 100 (Routine) |
Climate Trend
44 complete years, 1950 to 2022| Year | Annual mean temperature | Difference from the station mean |
|---|---|---|
| 1950 | 8.5 C | -0.44 C |
| 1951 | 7.5 C | -1.43 C |
| 1953 | 9.6 C | +0.69 C |
| 1954 | 10.3 C | +1.33 C |
| 1955 | 8.0 C | -0.97 C |
| 1956 | 9.1 C | +0.17 C |
| 1957 | 8.6 C | -0.32 C |
| 1958 | 8.7 C | -0.20 C |
| 1959 | 8.1 C | -0.79 C |
| 1960 | 8.7 C | -0.23 C |
| 1961 | 8.7 C | -0.23 C |
| 1962 | 8.9 C | -0.03 C |
| 1963 | 9.9 C | +0.95 C |
| 1964 | 8.4 C | -0.57 C |
| 1965 | 8.5 C | -0.38 C |
| 1966 | 8.9 C | -0.01 C |
| 1967 | 8.4 C | -0.50 C |
| 1968 | 7.9 C | -1.00 C |
| 1969 | 8.7 C | -0.23 C |
| 1970 | 8.1 C | -0.87 C |
| 1971 | 8.1 C | -0.83 C |
| 1972 | 8.3 C | -0.61 C |
| 1974 | 9.0 C | +0.03 C |
| 1975 | 7.9 C | -0.98 C |
| 1976 | 8.9 C | -0.05 C |
| 1977 | 9.5 C | +0.56 C |
| 1978 | 8.2 C | -0.72 C |
| 1981 | 10.7 C | +1.82 C |
| 1982 | 8.9 C | -0.06 C |
| 1983 | 9.6 C | +0.68 C |
| 1984 | 9.4 C | +0.52 C |
| 1985 | 8.5 C | -0.38 C |
| 1986 | 10.5 C | +1.54 C |
| 1987 | 10.1 C | +1.21 C |
| 1989 | 9.7 C | +0.78 C |
| 1990 | 9.0 C | +0.11 C |
| 2013 | 8.8 C | -0.12 C |
| 2014 | 8.3 C | -0.61 C |
| 2015 | 9.8 C | +0.83 C |
| 2016 | 9.8 C | +0.84 C |
| 2019 | 7.8 C | -1.16 C |
| 2020 | 9.6 C | +0.65 C |
| 2021 | 9.6 C | +0.65 C |
| 2022 | 9.4 C | +0.44 C |
The fitted trend in annual mean temperature here over 1950 to 2022 is 0.10 C (-0.01 to 0.20) per decade. The interval includes zero, so the trend is not clearly different from zero. In Fahrenheit: 0.17 F (-0.02 to 0.37) per decade. The slope is a straight line fitted to 44 complete years; the brackets give its 95 percent interval.
| Measure | Per decade (C) | Per decade (F) | Period | Complete years | Reading |
|---|---|---|---|---|---|
| Annual mean temperature | 0.10 C (-0.01 to 0.20) per decade | 0.17 F (-0.02 to 0.37) per decade | 1950 to 2022 | 44 | Not clearly different from zero |
| Mean daily maximum | 0.03 C (-0.13 to 0.19) per decade | 0.1 F (-0.2 to 0.3) per decade | 1950 to 2022 | 44 | Not clearly different from zero |
| Mean daily minimum | 0.2 C (0.1 to 0.3) per decade | 0.3 F (0.1 to 0.5) per decade | 1950 to 2022 | 44 | 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
1949 to 2026| Measure | Record | Year of the record | Median year | Years with a value |
|---|---|---|---|---|
| Hottest day (TXx) | 45.6 C (114.1 F) | 1988 | 38.3 C (100.9 F) | 58 |
| Coldest night (TNn) | -41.7 C (-43.1 F) | 1989 | -28.3 C (-18.9 F) | 58 |
| Wettest day (Rx1day) | 97.8 mm (3.9 in) | 1965 | 30.5 mm (1.2 in) | 58 |
| Wettest five days (Rx5day) | 116.6 mm (4.6 in) | 1965 | 45.8 mm (1.8 in) | 58 |
| Longest dry spell (CDD) | 74 days | 1949 | 39 days | 58 |
Hottest day (TXx)
| Year | Hottest day (TXx) |
|---|---|
| 1949 | 37.8 C (100.0 F) |
| 1950 | 35.6 C (96.1 F) |
| 1951 | 37.8 C (100.0 F) |
| 1952 | 37.8 C (100.0 F) |
| 1953 | 38.3 C (100.9 F) |
| 1954 | 42.2 C (108.0 F) |
| 1955 | 38.9 C (102.0 F) |
| 1956 | 38.3 C (100.9 F) |
| 1957 | 37.8 C (100.0 F) |
| 1958 | 37.8 C (100.0 F) |
| 1959 | 38.9 C (102.0 F) |
| 1960 | 38.9 C (102.0 F) |
| 1961 | 38.9 C (102.0 F) |
| 1962 | 37.2 C (99.0 F) |
| 1963 | 39.4 C (102.9 F) |
| 1964 | 40.6 C (105.1 F) |
| 1965 | 38.3 C (100.9 F) |
| 1966 | 38.9 C (102.0 F) |
| 1967 | 36.7 C (98.1 F) |
| 1968 | 37.8 C (100.0 F) |
| 1969 | 38.9 C (102.0 F) |
| 1970 | 37.2 C (99.0 F) |
| 1971 | 36.7 C (98.1 F) |
| 1972 | 37.8 C (100.0 F) |
| 1973 | 38.3 C (100.9 F) |
| 1974 | 38.9 C (102.0 F) |
| 1975 | 38.9 C (102.0 F) |
| 1976 | 41.1 C (106.0 F) |
| 1977 | 38.3 C (100.9 F) |
| 1978 | 38.3 C (100.9 F) |
| 1979 | 41.1 C (106.0 F) |
| 1980 | 38.9 C (102.0 F) |
| 1981 | 39.4 C (102.9 F) |
| 1982 | 39.4 C (102.9 F) |
| 1983 | 38.9 C (102.0 F) |
| 1984 | 36.7 C (98.1 F) |
| 1985 | 39.4 C (102.9 F) |
| 1986 | 39.4 C (102.9 F) |
| 1987 | 38.9 C (102.0 F) |
| 1988 | 45.6 C (114.1 F) |
| 1989 | 42.2 C (108.0 F) |
| 1990 | 37.2 C (99.0 F) |
| 1991 | 38.9 C (102.0 F) |
| 2012 | 39.4 C (102.9 F) |
| 2013 | 36.7 C (98.1 F) |
| 2014 | 37.2 C (99.0 F) |
| 2015 | 36.7 C (98.1 F) |
| 2016 | 37.8 C (100.0 F) |
| 2017 | 38.9 C (102.0 F) |
| 2018 | 37.8 C (100.0 F) |
| 2019 | 37.2 C (99.0 F) |
| 2020 | 37.8 C (100.0 F) |
| 2021 | 38.9 C (102.0 F) |
| 2022 | 38.3 C (100.9 F) |
| 2023 | 28.3 C (82.9 F) |
| 2024 | 38.3 C (100.9 F) |
| 2025 | 37.8 C (100.0 F) |
| 2026 | 40.6 C (105.1 F) |
Coldest night (TNn)
| Year | Coldest night (TNn) |
|---|---|
| 1949 | -22.8 C (-9.0 F) |
| 1950 | -27.8 C (-18.0 F) |
| 1951 | -34.4 C (-29.9 F) |
| 1952 | -27.2 C (-17.0 F) |
| 1953 | -21.1 C (-6.0 F) |
| 1954 | -25.0 C (-13.0 F) |
| 1955 | -27.8 C (-18.0 F) |
| 1956 | -28.3 C (-18.9 F) |
| 1957 | -28.3 C (-18.9 F) |
| 1958 | -22.2 C (-8.0 F) |
| 1959 | -35.6 C (-32.1 F) |
| 1960 | -26.7 C (-16.1 F) |
| 1961 | -24.4 C (-11.9 F) |
| 1962 | -33.3 C (-27.9 F) |
| 1963 | -37.2 C (-35.0 F) |
| 1964 | -34.4 C (-29.9 F) |
| 1965 | -23.9 C (-11.0 F) |
| 1966 | -31.1 C (-24.0 F) |
| 1967 | -29.4 C (-20.9 F) |
| 1968 | -31.1 C (-24.0 F) |
| 1969 | -27.2 C (-17.0 F) |
| 1970 | -26.1 C (-15.0 F) |
| 1971 | -28.3 C (-18.9 F) |
| 1972 | -35.0 C (-31.0 F) |
| 1973 | -29.4 C (-20.9 F) |
| 1974 | -31.7 C (-25.1 F) |
| 1975 | -32.8 C (-27.0 F) |
| 1976 | -24.4 C (-11.9 F) |
| 1977 | -29.4 C (-20.9 F) |
| 1978 | -31.7 C (-25.1 F) |
| 1979 | -32.2 C (-26.0 F) |
| 1980 | -30.6 C (-23.1 F) |
| 1981 | -31.7 C (-25.1 F) |
| 1982 | -35.6 C (-32.1 F) |
| 1983 | -36.1 C (-33.0 F) |
| 1984 | -35.6 C (-32.1 F) |
| 1985 | -31.7 C (-25.1 F) |
| 1986 | -28.3 C (-18.9 F) |
| 1987 | -31.1 C (-24.0 F) |
| 1988 | -33.3 C (-27.9 F) |
| 1989 | -41.7 C (-43.1 F) |
| 1990 | -37.2 C (-35.0 F) |
| 1991 | -29.4 C (-20.9 F) |
| 2012 | -23.3 C (-9.9 F) |
| 2013 | -25.6 C (-14.1 F) |
| 2014 | -28.3 C (-18.9 F) |
| 2015 | -23.3 C (-9.9 F) |
| 2016 | -30.0 C (-22.0 F) |
| 2017 | -27.2 C (-17.0 F) |
| 2018 | -27.2 C (-17.0 F) |
| 2019 | -26.7 C (-16.1 F) |
| 2020 | -23.9 C (-11.0 F) |
| 2021 | -27.2 C (-17.0 F) |
| 2022 | -26.7 C (-16.1 F) |
| 2023 | -30.6 C (-23.1 F) |
| 2024 | -12.2 C (10.0 F) |
| 2025 | -26.1 C (-15.0 F) |
| 2026 | -17.8 C (0.0 F) |
Wettest day (Rx1day)
| Year | Wettest day (Rx1day) |
|---|---|
| 1949 | 23.6 mm (0.9 in) |
| 1950 | 24.6 mm (1.0 in) |
| 1951 | 38.1 mm (1.5 in) |
| 1952 | 22.1 mm (0.9 in) |
| 1953 | 16.8 mm (0.7 in) |
| 1954 | 35.6 mm (1.4 in) |
| 1955 | 82.6 mm (3.3 in) |
| 1956 | 32.3 mm (1.3 in) |
| 1957 | 52.1 mm (2.1 in) |
| 1958 | 25.9 mm (1.0 in) |
| 1959 | 36.8 mm (1.4 in) |
| 1960 | 33.8 mm (1.3 in) |
| 1961 | 34.3 mm (1.4 in) |
| 1962 | 39.4 mm (1.6 in) |
| 1963 | 38.1 mm (1.5 in) |
| 1964 | 43.2 mm (1.7 in) |
| 1965 | 97.8 mm (3.9 in) |
| 1966 | 22.9 mm (0.9 in) |
| 1967 | 61.0 mm (2.4 in) |
| 1968 | 17.8 mm (0.7 in) |
| 1969 | 42.2 mm (1.7 in) |
| 1970 | 69.1 mm (2.7 in) |
| 1971 | 45.2 mm (1.8 in) |
| 1972 | 16.8 mm (0.7 in) |
| 1973 | 40.1 mm (1.6 in) |
| 1974 | 20.8 mm (0.8 in) |
| 1975 | 18.0 mm (0.7 in) |
| 1976 | 32.8 mm (1.3 in) |
| 1977 | 44.7 mm (1.8 in) |
| 1978 | 23.1 mm (0.9 in) |
| 1979 | 19.3 mm (0.8 in) |
| 1980 | 45.7 mm (1.8 in) |
| 1981 | 34.3 mm (1.4 in) |
| 1982 | 38.1 mm (1.5 in) |
| 1983 | 53.3 mm (2.1 in) |
| 1984 | 59.7 mm (2.4 in) |
| 1985 | 27.9 mm (1.1 in) |
| 1986 | 41.9 mm (1.6 in) |
| 1987 | 21.6 mm (0.9 in) |
| 1988 | 33.8 mm (1.3 in) |
| 1989 | 27.9 mm (1.1 in) |
| 1990 | 36.8 mm (1.4 in) |
| 1991 | 71.1 mm (2.8 in) |
| 2012 | 16.8 mm (0.7 in) |
| 2013 | 24.4 mm (1.0 in) |
| 2014 | 28.7 mm (1.1 in) |
| 2015 | 28.4 mm (1.1 in) |
| 2016 | 51.8 mm (2.0 in) |
| 2017 | 26.4 mm (1.0 in) |
| 2018 | 22.1 mm (0.9 in) |
| 2019 | 22.6 mm (0.9 in) |
| 2020 | 9.4 mm (0.37 in) |
| 2021 | 22.9 mm (0.9 in) |
| 2022 | 17.0 mm (0.7 in) |
| 2023 | 16.5 mm (0.6 in) |
| 2024 | 8.1 mm (0.32 in) |
| 2025 | 23.4 mm (0.9 in) |
| 2026 | 16.8 mm (0.7 in) |
Wettest five days (Rx5day)
| Year | Wettest five days (Rx5day) |
|---|---|
| 1949 | 46.8 mm (1.8 in) |
| 1950 | 34.3 mm (1.4 in) |
| 1951 | 56.2 mm (2.2 in) |
| 1952 | 31.8 mm (1.3 in) |
| 1953 | 26.2 mm (1.0 in) |
| 1954 | 38.4 mm (1.5 in) |
| 1955 | 88.7 mm (3.5 in) |
| 1956 | 48.6 mm (1.9 in) |
| 1957 | 69.1 mm (2.7 in) |
| 1958 | 35.6 mm (1.4 in) |
| 1959 | 51.6 mm (2.0 in) |
| 1960 | 37.4 mm (1.5 in) |
| 1961 | 61.5 mm (2.4 in) |
| 1962 | 51.3 mm (2.0 in) |
| 1963 | 41.6 mm (1.6 in) |
| 1964 | 54.4 mm (2.1 in) |
| 1965 | 116.6 mm (4.6 in) |
| 1966 | 32.0 mm (1.3 in) |
| 1967 | 61.8 mm (2.4 in) |
| 1968 | 42.0 mm (1.7 in) |
| 1969 | 61.3 mm (2.4 in) |
| 1970 | 98.0 mm (3.9 in) |
| 1971 | 79.0 mm (3.1 in) |
| 1972 | 23.6 mm (0.9 in) |
| 1973 | 77.4 mm (3.0 in) |
| 1974 | 24.7 mm (1.0 in) |
| 1975 | 23.8 mm (0.9 in) |
| 1976 | 63.8 mm (2.5 in) |
| 1977 | 52.1 mm (2.1 in) |
| 1978 | 40.7 mm (1.6 in) |
| 1979 | 27.0 mm (1.1 in) |
| 1980 | 73.4 mm (2.9 in) |
| 1981 | 46.5 mm (1.8 in) |
| 1982 | 65.8 mm (2.6 in) |
| 1983 | 62.9 mm (2.5 in) |
| 1984 | 60.0 mm (2.4 in) |
| 1985 | 37.1 mm (1.5 in) |
| 1986 | 90.4 mm (3.6 in) |
| 1987 | 47.5 mm (1.9 in) |
| 1988 | 42.5 mm (1.7 in) |
| 1989 | 55.1 mm (2.2 in) |
| 1990 | 41.9 mm (1.6 in) |
| 1991 | 81.3 mm (3.2 in) |
| 2012 | 18.8 mm (0.7 in) |
| 2013 | 33.6 mm (1.3 in) |
| 2014 | 45.9 mm (1.8 in) |
| 2015 | 45.7 mm (1.8 in) |
| 2016 | 58.9 mm (2.3 in) |
| 2017 | 42.5 mm (1.7 in) |
| 2018 | 49.0 mm (1.9 in) |
| 2019 | 33.6 mm (1.3 in) |
| 2020 | 20.1 mm (0.8 in) |
| 2021 | 28.4 mm (1.1 in) |
| 2022 | 36.9 mm (1.5 in) |
| 2023 | 40.6 mm (1.6 in) |
| 2024 | 14.8 mm (0.6 in) |
| 2025 | 39.4 mm (1.6 in) |
| 2026 | 24.2 mm (1.0 in) |
Longest dry spell (CDD)
| Year | Longest dry spell (CDD) |
|---|---|
| 1949 | 74 days |
| 1950 | 39 days |
| 1951 | 29 days |
| 1952 | 33 days |
| 1953 | 64 days |
| 1954 | 31 days |
| 1955 | 35 days |
| 1956 | 49 days |
| 1957 | 42 days |
| 1958 | 58 days |
| 1959 | 48 days |
| 1960 | 32 days |
| 1961 | 47 days |
| 1962 | 40 days |
| 1963 | 46 days |
| 1964 | 40 days |
| 1965 | 29 days |
| 1966 | 32 days |
| 1967 | 23 days |
| 1968 | 64 days |
| 1969 | 44 days |
| 1970 | 34 days |
| 1971 | 46 days |
| 1972 | 36 days |
| 1973 | 39 days |
| 1974 | 49 days |
| 1975 | 30 days |
| 1976 | 39 days |
| 1977 | 58 days |
| 1978 | 31 days |
| 1979 | 35 days |
| 1980 | 24 days |
| 1981 | 38 days |
| 1982 | 59 days |
| 1983 | 35 days |
| 1984 | 54 days |
| 1985 | 31 days |
| 1986 | 31 days |
| 1987 | 47 days |
| 1988 | 28 days |
| 1989 | 35 days |
| 1990 | 43 days |
| 1991 | 32 days |
| 2012 | 49 days |
| 2013 | 47 days |
| 2014 | 51 days |
| 2015 | 35 days |
| 2016 | 37 days |
| 2017 | 22 days |
| 2018 | 31 days |
| 2019 | 39 days |
| 2020 | 38 days |
| 2021 | 34 days |
| 2022 | 54 days |
| 2023 | 25 days |
| 2024 | 52 days |
| 2025 | 50 days |
| 2026 | 54 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
44 years with a frostAcross 44 years with a frost, the median last spring frost at Whalen Dam (Usbr) falls on 13 May and the median first autumn frost on 21 September, which leaves a median of 132 days between them.
Fitted over all years, the growing season changes by +0.4 days per decade at this station.
| Measure | Median, all years | Earliest period | Recent period (1965 to 2022) | Recent against earliest | Fitted trend |
|---|---|---|---|---|---|
| Last spring frost | 13 May | n/a | 14 May | n/a | +0.3 days per decade |
| First autumn frost | 21 September | n/a | 20 September | n/a | +0.7 days per decade |
| Growing days | 132 days | n/a | 131 days | n/a | +0.4 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
51 years, 1950 to 2025A day with at least 31.4 mm (1.2 in) of rain is expected about once in 2 years. A day with at least 97.0 mm (3.8 in) of rain is expected about once in 100 years.
| Expected about once in | A day with at least | Note |
|---|---|---|
| 2 years | 31.4 mm (1.2 in) | |
| 5 years | 46.0 mm (1.8 in) | |
| 10 years | 56.8 mm (2.2 in) | |
| 25 years | 71.8 mm (2.8 in) | |
| 50 years | 83.9 mm (3.3 in) | |
| 100 years | 97.0 mm (3.8 in) | Longer than the 51 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, 51 years of values from 1950 to 2025.
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: 97.8 mm (3.9 in) in 1965; 82.6 mm (3.3 in) in 1955; 69.1 mm (2.7 in) in 1970.
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 2026-10-12 (12 October 2026). Records are computed by this site and are not official.
Data as of . Last revised (2026-10-13).