Pelton Dam Weather Records (USC00356532)
Record envelope, standing records and threshold days for Pelton Dam (USC00356532), Oregon, United States, with 69 years of record.
Key Facts for Pelton Dam
- Pelton Dam (USC00356532) is a weather station in Oregon, United States at 44.72 latitude and -121.25 longitude, 452 m (1,484 ft) above sea level.
- The station reports from 1958 to 2026, 69 years of record.
- 1,464 records set at Pelton Dam still stand.
- Records are tracked for tmax, tmin, prcp, snow, snwd: an element needs 30 years of data to be eligible.
- Pelton Dam set a daily record precipitation of 3.3 mm (0.13 in) on 13 September 2026 (provisional).
Provisional Records
Records set in the last 60 days are provisional until they clear the revision window.
About the Station
- Location: Oregon, United States, 44.72 latitude, -121.25 longitude.
- Elevation: 452 m (1,484 ft).
- Period of record: 1958 to 2026, 69 years.
- Eligible elements: tmax, tmin, prcp, snow, snwd.
Daily Record Envelope and 2026
5 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) | -24.4 C (-11.9 F) | 16.1 C (61.0 F) | -8.9 C (16.0 F) |
| Feb | 25.6 C (78.1 F) | -23.9 C (-11.0 F) | 19.4 C (66.9 F) | -5.6 C (21.9 F) |
| Mar | 30.0 C (86.0 F) | -12.8 C (9.0 F) | 28.3 C (82.9 F) | -3.3 C (26.1 F) |
| Apr | 35.0 C (95.0 F) | -8.3 C (17.1 F) | 28.9 C (84.0 F) | -3.9 C (25.0 F) |
| May | 42.2 C (108.0 F) | -5.6 C (21.9 F) | 33.9 C (93.0 F) | 2.8 C (37.0 F) |
| Jun | 48.3 C (118.9 F) | -5.0 C (23.0 F) | 36.7 C (98.1 F) | 3.9 C (39.0 F) |
| Jul | 45.6 C (114.1 F) | 1.7 C (35.1 F) | 39.4 C (102.9 F) | 6.1 C (43.0 F) |
| Aug | 47.2 C (117.0 F) | 1.1 C (34.0 F) | 40.0 C (104.0 F) | 7.2 C (45.0 F) |
| Sep | 42.2 C (108.0 F) | -3.9 C (25.0 F) | 33.9 C (93.0 F) | 2.8 C (37.0 F) |
| Oct | 39.4 C (102.9 F) | -12.8 C (9.0 F) | 32.2 C (90.0 F) | 1.1 C (34.0 F) |
| Nov | 27.2 C (81.0 F) | -18.9 C (-2.0 F) | n/a | n/a |
| Dec | 21.7 C (71.1 F) | -26.1 C (-15.0 F) | n/a | n/a |
Which Years Hold Standing Records
1,464 standing records| Year set | Standing records |
|---|---|
| 1958 | 11 |
| 1959 | 19 |
| 1960 | 23 |
| 1961 | 22 |
| 1962 | 25 |
| 1963 | 17 |
| 1964 | 24 |
| 1965 | 19 |
| 1966 | 10 |
| 1967 | 14 |
| 1968 | 26 |
| 1969 | 27 |
| 1970 | 26 |
| 1971 | 20 |
| 1972 | 38 |
| 1973 | 21 |
| 1974 | 23 |
| 1975 | 27 |
| 1976 | 19 |
| 1977 | 22 |
| 1978 | 20 |
| 1979 | 23 |
| 1980 | 16 |
| 1981 | 13 |
| 1982 | 16 |
| 1983 | 29 |
| 1984 | 14 |
| 1985 | 30 |
| 1986 | 32 |
| 1987 | 25 |
| 1988 | 25 |
| 1989 | 29 |
| 1990 | 25 |
| 1991 | 34 |
| 1992 | 36 |
| 1993 | 28 |
| 1994 | 35 |
| 1995 | 29 |
| 1996 | 36 |
| 1997 | 15 |
| 1998 | 22 |
| 1999 | 32 |
| 2000 | 16 |
| 2001 | 27 |
| 2002 | 20 |
| 2003 | 23 |
| 2004 | 13 |
| 2005 | 9 |
| 2006 | 21 |
| 2007 | 11 |
| 2008 | 20 |
| 2009 | 16 |
| 2010 | 9 |
| 2011 | 13 |
| 2012 | 11 |
| 2013 | 10 |
| 2014 | 31 |
| 2015 | 29 |
| 2016 | 11 |
| 2017 | 15 |
| 2018 | 11 |
| 2019 | 36 |
| 2020 | 17 |
| 2021 | 17 |
| 2022 | 27 |
| 2023 | 17 |
| 2024 | 11 |
| 2025 | 20 |
| 2026 | 6 |
All-Time Record Progression
10 new records| Date | Kind | Detail |
|---|---|---|
| 1991-08-04 | Record high minimum temperature | Record high minimum temperature 22.2 C (72.0 F) |
| 1992-06-23 | Record high maximum temperature | Record high maximum temperature 45.0 C (113.0 F) |
| 1992-08-13 | Record high maximum temperature | Record high maximum temperature 45.6 C (114.1 F) |
| 1996-11-19 | Record daily precipitation | Record daily precipitation 71.1 mm (2.8 in) |
| 1998-08-04 | Record high maximum temperature | Record high maximum temperature 47.2 C (117.0 F) |
| 2002-07-13 | Record high minimum temperature | Record high minimum temperature 23.3 C (73.9 F) |
| 2014-02-08 | Record daily snowfall | Record daily snowfall 30.5 cm (12.0 in) |
| 2016-12-15 | Record daily snowfall | Record daily snowfall 40.6 cm (16.0 in) |
| 2021-06-30 | Record high maximum temperature | Record high maximum temperature 48.3 C (118.9 F) |
| 2024-01-14 | Record low maximum temperature | Record low maximum temperature -15.0 C (5.0 F) |
Wettest Day of Each Month
Nov: 71.1 mm (2.8 in)| Month | Record daily precipitation (mm) | Date |
|---|---|---|
| Jan | 23.6 mm (0.9 in) | 8 January 1990 |
| Feb | 45.7 mm (1.8 in) | 16 February 2024 |
| Mar | 18.0 mm (0.7 in) | 31 March 1999 |
| Apr | 31.0 mm (1.2 in) | 26 April 1978 |
| May | 40.6 mm (1.6 in) | 5 May 2005 |
| Jun | 27.9 mm (1.1 in) | 3 June 2010 |
| Jul | 22.6 mm (0.9 in) | 9 July 1995 |
| Aug | 40.6 mm (1.6 in) | 10 August 2019 |
| Sep | 29.2 mm (1.1 in) | 20 September 1982 |
| Oct | 31.0 mm (1.2 in) | 19 October 2007 |
| Nov | 71.1 mm (2.8 in) | 19 November 1996 |
| Dec | 50.8 mm (2.0 in) | 23 December 1964 |
Period of Record Coverage
1958 to 2026| Year | Days with data | Share of year | Complete |
|---|---|---|---|
| 1958 | 140 | 38% | No |
| 1959 | 365 | 100% | Yes |
| 1960 | 366 | 100% | Yes |
| 1961 | 365 | 100% | Yes |
| 1962 | 365 | 100% | Yes |
| 1963 | 365 | 100% | Yes |
| 1964 | 365 | 100% | Yes |
| 1965 | 349 | 96% | Yes |
| 1966 | 344 | 94% | Yes |
| 1967 | 365 | 100% | Yes |
| 1968 | 366 | 100% | Yes |
| 1969 | 365 | 100% | Yes |
| 1970 | 364 | 100% | Yes |
| 1971 | 364 | 100% | Yes |
| 1972 | 366 | 100% | Yes |
| 1973 | 363 | 99% | Yes |
| 1974 | 365 | 100% | Yes |
| 1975 | 365 | 100% | Yes |
| 1976 | 366 | 100% | Yes |
| 1977 | 362 | 99% | Yes |
| 1978 | 365 | 100% | Yes |
| 1979 | 342 | 94% | Yes |
| 1980 | 287 | 78% | No |
| 1981 | 355 | 97% | Yes |
| 1982 | 364 | 100% | Yes |
| 1983 | 351 | 96% | Yes |
| 1984 | 361 | 99% | Yes |
| 1985 | 364 | 100% | Yes |
| 1986 | 361 | 99% | Yes |
| 1987 | 362 | 99% | Yes |
| 1988 | 359 | 98% | Yes |
| 1989 | 358 | 98% | Yes |
| 1990 | 361 | 99% | Yes |
| 1991 | 358 | 98% | Yes |
| 1992 | 362 | 99% | Yes |
| 1993 | 362 | 99% | Yes |
| 1994 | 362 | 99% | Yes |
| 1995 | 361 | 99% | Yes |
| 1996 | 364 | 99% | Yes |
| 1997 | 349 | 96% | Yes |
| 1998 | 329 | 90% | Yes |
| 1999 | 361 | 99% | Yes |
| 2000 | 351 | 96% | Yes |
| 2001 | 352 | 96% | Yes |
| 2002 | 333 | 91% | Yes |
| 2003 | 302 | 83% | No |
| 2004 | 308 | 84% | No |
| 2005 | 336 | 92% | Yes |
| 2006 | 365 | 100% | Yes |
| 2007 | 362 | 99% | Yes |
| 2008 | 295 | 81% | No |
| 2009 | 364 | 100% | Yes |
| 2010 | 362 | 99% | Yes |
| 2011 | 365 | 100% | Yes |
| 2012 | 366 | 100% | Yes |
| 2013 | 365 | 100% | Yes |
| 2014 | 335 | 92% | Yes |
| 2015 | 337 | 92% | Yes |
| 2016 | 362 | 99% | Yes |
| 2017 | 326 | 89% | No |
| 2018 | 362 | 99% | Yes |
| 2019 | 309 | 85% | No |
| 2020 | 315 | 86% | No |
| 2021 | 323 | 88% | No |
| 2022 | 351 | 96% | Yes |
| 2023 | 344 | 94% | Yes |
| 2024 | 353 | 96% | Yes |
| 2025 | 360 | 99% | Yes |
| 2026 | 264 | 72% | No |
Latest Records
20| Date | Station | Record | Value | Beat old record by | Old record stood | Significance |
|---|---|---|---|---|---|---|
| 13 September 2026 | Pelton Dam, US | daily rain (Provisional) | 3.3 mm (0.13 in) | 1.5 mm (0.06 in) | 48 years | 20 of 100 (Routine) |
| 22 July 2026 | Pelton Dam, US | daily high min | 19.4 C (66.9 F) | 0.5 C (0.9 F) | 23 years | 13 of 100 (Routine) |
| 11 April 2026 | Pelton Dam, US | daily high min (Tie) | 8.9 C (48.0 F) | tie | 44 years | 4 of 100 (Routine) |
| 10 April 2026 | Pelton Dam, US | daily high min (Tie) | 7.8 C (46.0 F) | tie | 52 years | 5 of 100 (Routine) |
| 21 March 2026 | Pelton Dam, US | daily high max | 28.3 C (82.9 F) | 1.1 C (2.0 F) | 65 years | 27 of 100 (Routine) |
| 20 March 2026 | Pelton Dam, US | daily high max | 27.8 C (82.0 F) | 2.8 C (5.0 F) | 65 years | 30 of 100 (Routine) |
| 20 March 2026 | Pelton Dam, US | daily high min | 12.8 C (55.0 F) | 3.4 C (6.1 F) | 31 years | 24 of 100 (Routine) |
| 19 March 2026 | Pelton Dam, US | daily high max | 27.2 C (81.0 F) | 1.6 C (2.9 F) | 48 years | 23 of 100 (Routine) |
| 18 March 2026 | Pelton Dam, US | daily high max | 28.3 C (82.9 F) | 2.7 C (4.9 F) | 48 years | 25 of 100 (Routine) |
| 8 March 2026 | Pelton Dam, US | daily high max (Tie) | 23.3 C (73.9 F) | tie | 21 years | 3 of 100 (Routine) |
| 19 December 2025 | Pelton Dam, US | daily rain | 31.0 mm (1.2 in) | 7.6 mm (0.30 in) | 44 years | 35 of 100 (Notable) |
| 16 December 2025 | Pelton Dam, US | daily high min | 10.6 C (51.1 F) | 1.7 C (3.1 F) | 52 years | 24 of 100 (Routine) |
| 16 December 2025 | Pelton Dam, US | monthly high max (Tie) | 21.7 C (71.1 F) | tie | 0 years | 4 of 100 (Routine) |
| 12 December 2025 | Pelton Dam, US | monthly high max | 21.7 C (71.1 F) | 1.1 C (2.0 F) | 67 years | 37 of 100 (Notable) |
| 11 December 2025 | Pelton Dam, US | daily high max | 18.9 C (66.0 F) | 0.6 C (1.1 F) | 11 years | 10 of 100 (Routine) |
| 10 December 2025 | Pelton Dam, US | daily high max | 17.8 C (64.0 F) | 1.1 C (2.0 F) | 46 years | 20 of 100 (Routine) |
| 7 December 2025 | Pelton Dam, US | daily high max (Tie) | 15.0 C (59.0 F) | tie | 55 years | 5 of 100 (Routine) |
| 6 December 2025 | Pelton Dam, US | daily high max (Tie) | 16.1 C (61.0 F) | tie | 63 years | 6 of 100 (Routine) |
| 2 November 2025 | Pelton Dam, US | daily high max | 22.2 C (72.0 F) | 0.5 C (0.9 F) | 44 years | 19 of 100 (Routine) |
| 21 September 2025 | Pelton Dam, US | daily high min | 15.6 C (60.1 F) | 1.2 C (2.2 F) | 67 years | 29 of 100 (Routine) |
Climate Trend
56 complete years, 1959 to 2025| Year | Annual mean temperature | Difference from the station mean |
|---|---|---|
| 1959 | 11.3 C | -0.31 C |
| 1960 | 11.0 C | -0.59 C |
| 1961 | 12.0 C | +0.37 C |
| 1962 | 11.1 C | -0.54 C |
| 1963 | 11.1 C | -0.50 C |
| 1964 | 10.7 C | -0.88 C |
| 1967 | 12.3 C | +0.67 C |
| 1968 | 11.7 C | +0.04 C |
| 1969 | 10.8 C | -0.85 C |
| 1970 | 11.2 C | -0.39 C |
| 1971 | 11.3 C | -0.34 C |
| 1972 | 11.2 C | -0.38 C |
| 1973 | 11.7 C | +0.11 C |
| 1974 | 11.9 C | +0.24 C |
| 1975 | 11.2 C | -0.46 C |
| 1976 | 11.5 C | -0.17 C |
| 1977 | 11.4 C | -0.24 C |
| 1978 | 10.9 C | -0.68 C |
| 1981 | 11.8 C | +0.16 C |
| 1982 | 10.9 C | -0.75 C |
| 1983 | 11.4 C | -0.25 C |
| 1984 | 11.1 C | -0.50 C |
| 1985 | 10.3 C | -1.35 C |
| 1986 | 11.9 C | +0.31 C |
| 1987 | 12.5 C | +0.85 C |
| 1988 | 12.2 C | +0.57 C |
| 1989 | 11.7 C | +0.04 C |
| 1990 | 12.8 C | +1.13 C |
| 1991 | 12.6 C | +0.99 C |
| 1992 | 13.4 C | +1.82 C |
| 1993 | 10.6 C | -1.03 C |
| 1994 | 12.7 C | +1.10 C |
| 1995 | 12.2 C | +0.53 C |
| 1996 | 11.7 C | +0.07 C |
| 1997 | 11.9 C | +0.26 C |
| 1999 | 12.5 C | +0.91 C |
| 2000 | 12.2 C | +0.62 C |
| 2001 | 12.5 C | +0.88 C |
| 2002 | 11.6 C | +0.00 C |
| 2003 | 12.5 C | +0.89 C |
| 2004 | 11.9 C | +0.31 C |
| 2005 | 10.9 C | -0.72 C |
| 2006 | 11.2 C | -0.38 C |
| 2007 | 11.1 C | -0.49 C |
| 2009 | 11.0 C | -0.67 C |
| 2010 | 11.0 C | -0.62 C |
| 2011 | 10.7 C | -0.92 C |
| 2012 | 11.6 C | +0.00 C |
| 2013 | 11.1 C | -0.52 C |
| 2016 | 11.9 C | +0.25 C |
| 2018 | 11.9 C | +0.26 C |
| 2020 | 12.1 C | +0.52 C |
| 2022 | 11.4 C | -0.19 C |
| 2023 | 11.7 C | +0.03 C |
| 2024 | 11.5 C | -0.09 C |
| 2025 | 12.4 C | +0.75 C |
The fitted trend in annual mean temperature here over 1959 to 2025 is 0.07 C (-0.02 to 0.16) per decade. The interval includes zero, so the trend is not clearly different from zero. In Fahrenheit: 0.12 F (-0.04 to 0.29) per decade. The slope is a straight line fitted to 56 complete years; the brackets give its 95 percent interval.
| Measure | Per decade (C) | Per decade (F) | Period | Complete years | Reading |
|---|---|---|---|---|---|
| Annual mean temperature | 0.07 C (-0.02 to 0.16) per decade | 0.12 F (-0.04 to 0.29) per decade | 1959 to 2025 | 56 | Not clearly different from zero |
| Mean daily maximum | -0.04 C (-0.20 to 0.12) per decade | -0.1 F (-0.4 to 0.2) per decade | 1959 to 2025 | 56 | Not clearly different from zero |
| Mean daily minimum | 0.2 C (0.1 to 0.3) per decade | 0.3 F (0.2 to 0.5) per decade | 1959 to 2025 | 56 | 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
1958 to 2026| Measure | Record | Year of the record | Median year | Years with a value |
|---|---|---|---|---|
| Hottest day (TXx) | 48.3 C (118.9 F) | 2021 | 42.8 C (109.0 F) | 69 |
| Coldest night (TNn) | -26.1 C (-15.0 F) | 1972 | -15.0 C (5.0 F) | 69 |
| Wettest day (Rx1day) | 71.1 mm (2.8 in) | 1996 | 21.3 mm (0.8 in) | 69 |
| Wettest five days (Rx5day) | 104.2 mm (4.1 in) | 1996 | 35.8 mm (1.4 in) | 69 |
| Longest dry spell (CDD) | 129 days | 1988 | 54 days | 69 |
Hottest day (TXx)
| Year | Hottest day (TXx) |
|---|---|
| 1958 | 41.1 C (106.0 F) |
| 1959 | 42.8 C (109.0 F) |
| 1960 | 42.2 C (108.0 F) |
| 1961 | 43.9 C (111.0 F) |
| 1962 | 40.6 C (105.1 F) |
| 1963 | 38.3 C (100.9 F) |
| 1964 | 40.6 C (105.1 F) |
| 1965 | 40.0 C (104.0 F) |
| 1966 | 38.9 C (102.0 F) |
| 1967 | 42.2 C (108.0 F) |
| 1968 | 42.8 C (109.0 F) |
| 1969 | 40.6 C (105.1 F) |
| 1970 | 41.7 C (107.1 F) |
| 1971 | 42.8 C (109.0 F) |
| 1972 | 44.4 C (111.9 F) |
| 1973 | 41.1 C (106.0 F) |
| 1974 | 40.6 C (105.1 F) |
| 1975 | 42.8 C (109.0 F) |
| 1976 | 40.0 C (104.0 F) |
| 1977 | 42.2 C (108.0 F) |
| 1978 | 42.8 C (109.0 F) |
| 1979 | 43.3 C (109.9 F) |
| 1980 | 42.2 C (108.0 F) |
| 1981 | 42.8 C (109.0 F) |
| 1982 | 40.6 C (105.1 F) |
| 1983 | 40.0 C (104.0 F) |
| 1984 | 41.1 C (106.0 F) |
| 1985 | 44.4 C (111.9 F) |
| 1986 | 44.4 C (111.9 F) |
| 1987 | 43.3 C (109.9 F) |
| 1988 | 42.8 C (109.0 F) |
| 1989 | 41.7 C (107.1 F) |
| 1990 | 43.9 C (111.0 F) |
| 1991 | 44.4 C (111.9 F) |
| 1992 | 45.6 C (114.1 F) |
| 1993 | 41.1 C (106.0 F) |
| 1994 | 45.6 C (114.1 F) |
| 1995 | 41.1 C (106.0 F) |
| 1996 | 45.0 C (113.0 F) |
| 1997 | 43.3 C (109.9 F) |
| 1998 | 47.2 C (117.0 F) |
| 1999 | 43.3 C (109.9 F) |
| 2000 | 43.3 C (109.9 F) |
| 2001 | 43.3 C (109.9 F) |
| 2002 | 42.8 C (109.0 F) |
| 2003 | 43.3 C (109.9 F) |
| 2004 | 40.6 C (105.1 F) |
| 2005 | 39.4 C (102.9 F) |
| 2006 | 43.3 C (109.9 F) |
| 2007 | 42.2 C (108.0 F) |
| 2008 | 43.3 C (109.9 F) |
| 2009 | 43.3 C (109.9 F) |
| 2010 | 40.0 C (104.0 F) |
| 2011 | 38.9 C (102.0 F) |
| 2012 | 40.6 C (105.1 F) |
| 2013 | 42.8 C (109.0 F) |
| 2014 | 41.1 C (106.0 F) |
| 2015 | 42.8 C (109.0 F) |
| 2016 | 40.6 C (105.1 F) |
| 2017 | 41.1 C (106.0 F) |
| 2018 | 42.8 C (109.0 F) |
| 2019 | 40.0 C (104.0 F) |
| 2020 | 42.2 C (108.0 F) |
| 2021 | 48.3 C (118.9 F) |
| 2022 | 45.0 C (113.0 F) |
| 2023 | 42.8 C (109.0 F) |
| 2024 | 43.3 C (109.9 F) |
| 2025 | 41.1 C (106.0 F) |
| 2026 | 40.0 C (104.0 F) |
Coldest night (TNn)
| Year | Coldest night (TNn) |
|---|---|
| 1958 | -8.9 C (16.0 F) |
| 1959 | -18.3 C (-0.9 F) |
| 1960 | -13.9 C (7.0 F) |
| 1961 | -13.3 C (8.1 F) |
| 1962 | -24.4 C (-11.9 F) |
| 1963 | -19.4 C (-2.9 F) |
| 1964 | -20.6 C (-5.1 F) |
| 1965 | -10.6 C (12.9 F) |
| 1966 | -8.9 C (16.0 F) |
| 1967 | -15.0 C (5.0 F) |
| 1968 | -20.0 C (-4.0 F) |
| 1969 | -18.9 C (-2.0 F) |
| 1970 | -12.8 C (9.0 F) |
| 1971 | -12.2 C (10.0 F) |
| 1972 | -26.1 C (-15.0 F) |
| 1973 | -12.2 C (10.0 F) |
| 1974 | -20.0 C (-4.0 F) |
| 1975 | -10.6 C (12.9 F) |
| 1976 | -15.0 C (5.0 F) |
| 1977 | -15.6 C (3.9 F) |
| 1978 | -17.8 C (0.0 F) |
| 1979 | -23.3 C (-9.9 F) |
| 1980 | -18.3 C (-0.9 F) |
| 1981 | -8.3 C (17.1 F) |
| 1982 | -17.2 C (1.0 F) |
| 1983 | -22.8 C (-9.0 F) |
| 1984 | -17.2 C (1.0 F) |
| 1985 | -17.8 C (0.0 F) |
| 1986 | -8.3 C (17.1 F) |
| 1987 | -15.0 C (5.0 F) |
| 1988 | -15.0 C (5.0 F) |
| 1989 | -23.9 C (-11.0 F) |
| 1990 | -23.9 C (-11.0 F) |
| 1991 | -11.1 C (12.0 F) |
| 1992 | -13.3 C (8.1 F) |
| 1993 | -18.9 C (-2.0 F) |
| 1994 | -15.0 C (5.0 F) |
| 1995 | -14.4 C (6.1 F) |
| 1996 | -20.6 C (-5.1 F) |
| 1997 | -14.4 C (6.1 F) |
| 1998 | -17.2 C (1.0 F) |
| 1999 | -7.8 C (18.0 F) |
| 2000 | -12.2 C (10.0 F) |
| 2001 | -9.4 C (15.1 F) |
| 2002 | -13.3 C (8.1 F) |
| 2003 | -12.2 C (10.0 F) |
| 2004 | -15.0 C (5.0 F) |
| 2005 | -12.2 C (10.0 F) |
| 2006 | -13.9 C (7.0 F) |
| 2007 | -13.9 C (7.0 F) |
| 2008 | -17.8 C (0.0 F) |
| 2009 | -18.9 C (-2.0 F) |
| 2010 | -13.3 C (8.1 F) |
| 2011 | -14.4 C (6.1 F) |
| 2012 | -10.0 C (14.0 F) |
| 2013 | -23.9 C (-11.0 F) |
| 2014 | -18.9 C (-2.0 F) |
| 2015 | -14.4 C (6.1 F) |
| 2016 | -13.3 C (8.1 F) |
| 2017 | -22.8 C (-9.0 F) |
| 2018 | -14.4 C (6.1 F) |
| 2019 | -15.6 C (3.9 F) |
| 2020 | -8.3 C (17.1 F) |
| 2021 | -10.6 C (12.9 F) |
| 2022 | -15.6 C (3.9 F) |
| 2023 | -15.6 C (3.9 F) |
| 2024 | -17.8 C (0.0 F) |
| 2025 | -12.8 C (9.0 F) |
| 2026 | -8.9 C (16.0 F) |
Wettest day (Rx1day)
| Year | Wettest day (Rx1day) |
|---|---|
| 1958 | 17.0 mm (0.7 in) |
| 1959 | 17.5 mm (0.7 in) |
| 1960 | 30.5 mm (1.2 in) |
| 1961 | 29.2 mm (1.1 in) |
| 1962 | 24.4 mm (1.0 in) |
| 1963 | 21.6 mm (0.9 in) |
| 1964 | 50.8 mm (2.0 in) |
| 1965 | 21.3 mm (0.8 in) |
| 1966 | 16.8 mm (0.7 in) |
| 1967 | 10.9 mm (0.4 in) |
| 1968 | 21.6 mm (0.9 in) |
| 1969 | 22.1 mm (0.9 in) |
| 1970 | 21.8 mm (0.9 in) |
| 1971 | 17.0 mm (0.7 in) |
| 1972 | 11.9 mm (0.5 in) |
| 1973 | 16.3 mm (0.6 in) |
| 1974 | 16.5 mm (0.6 in) |
| 1975 | 18.3 mm (0.7 in) |
| 1976 | 14.0 mm (0.6 in) |
| 1977 | 27.9 mm (1.1 in) |
| 1978 | 31.0 mm (1.2 in) |
| 1979 | 18.5 mm (0.7 in) |
| 1980 | 23.4 mm (0.9 in) |
| 1981 | 25.7 mm (1.0 in) |
| 1982 | 29.2 mm (1.1 in) |
| 1983 | 22.1 mm (0.9 in) |
| 1984 | 45.7 mm (1.8 in) |
| 1985 | 14.0 mm (0.6 in) |
| 1986 | 16.5 mm (0.6 in) |
| 1987 | 17.8 mm (0.7 in) |
| 1988 | 19.1 mm (0.8 in) |
| 1989 | 26.4 mm (1.0 in) |
| 1990 | 23.6 mm (0.9 in) |
| 1991 | 13.5 mm (0.5 in) |
| 1992 | 15.5 mm (0.6 in) |
| 1993 | 25.9 mm (1.0 in) |
| 1994 | 13.5 mm (0.5 in) |
| 1995 | 22.6 mm (0.9 in) |
| 1996 | 71.1 mm (2.8 in) |
| 1997 | 15.5 mm (0.6 in) |
| 1998 | 34.0 mm (1.3 in) |
| 1999 | 19.8 mm (0.8 in) |
| 2000 | 15.5 mm (0.6 in) |
| 2001 | 17.3 mm (0.7 in) |
| 2002 | 10.7 mm (0.4 in) |
| 2003 | 19.6 mm (0.8 in) |
| 2004 | 19.3 mm (0.8 in) |
| 2005 | 40.6 mm (1.6 in) |
| 2006 | 23.1 mm (0.9 in) |
| 2007 | 31.0 mm (1.2 in) |
| 2008 | 7.1 mm (0.28 in) |
| 2009 | 16.3 mm (0.6 in) |
| 2010 | 27.9 mm (1.1 in) |
| 2011 | 20.3 mm (0.8 in) |
| 2012 | 23.9 mm (0.9 in) |
| 2013 | 27.9 mm (1.1 in) |
| 2014 | 14.5 mm (0.6 in) |
| 2015 | 15.5 mm (0.6 in) |
| 2016 | 19.3 mm (0.8 in) |
| 2017 | 13.7 mm (0.5 in) |
| 2018 | 14.7 mm (0.6 in) |
| 2019 | 40.6 mm (1.6 in) |
| 2020 | 19.1 mm (0.8 in) |
| 2021 | 21.8 mm (0.9 in) |
| 2022 | 32.8 mm (1.3 in) |
| 2023 | 23.6 mm (0.9 in) |
| 2024 | 45.7 mm (1.8 in) |
| 2025 | 31.0 mm (1.2 in) |
| 2026 | 23.9 mm (0.9 in) |
Wettest five days (Rx5day)
| Year | Wettest five days (Rx5day) |
|---|---|
| 1958 | 17.5 mm (0.7 in) |
| 1959 | 32.6 mm (1.3 in) |
| 1960 | 54.9 mm (2.2 in) |
| 1961 | 69.2 mm (2.7 in) |
| 1962 | 33.8 mm (1.3 in) |
| 1963 | 33.3 mm (1.3 in) |
| 1964 | 87.4 mm (3.4 in) |
| 1965 | 40.6 mm (1.6 in) |
| 1966 | 50.4 mm (2.0 in) |
| 1967 | 18.8 mm (0.7 in) |
| 1968 | 25.3 mm (1.0 in) |
| 1969 | 40.4 mm (1.6 in) |
| 1970 | 42.6 mm (1.7 in) |
| 1971 | 43.7 mm (1.7 in) |
| 1972 | 25.7 mm (1.0 in) |
| 1973 | 39.7 mm (1.6 in) |
| 1974 | 24.9 mm (1.0 in) |
| 1975 | 29.5 mm (1.2 in) |
| 1976 | 18.8 mm (0.7 in) |
| 1977 | 62.7 mm (2.5 in) |
| 1978 | 36.1 mm (1.4 in) |
| 1979 | 29.2 mm (1.1 in) |
| 1980 | 35.8 mm (1.4 in) |
| 1981 | 46.7 mm (1.8 in) |
| 1982 | 37.3 mm (1.5 in) |
| 1983 | 34.5 mm (1.4 in) |
| 1984 | 72.1 mm (2.8 in) |
| 1985 | 29.0 mm (1.1 in) |
| 1986 | 35.8 mm (1.4 in) |
| 1987 | 32.8 mm (1.3 in) |
| 1988 | 36.6 mm (1.4 in) |
| 1989 | 45.2 mm (1.8 in) |
| 1990 | 54.1 mm (2.1 in) |
| 1991 | 23.6 mm (0.9 in) |
| 1992 | 28.2 mm (1.1 in) |
| 1993 | 34.8 mm (1.4 in) |
| 1994 | 23.4 mm (0.9 in) |
| 1995 | 49.8 mm (2.0 in) |
| 1996 | 104.2 mm (4.1 in) |
| 1997 | 49.0 mm (1.9 in) |
| 1998 | 49.0 mm (1.9 in) |
| 1999 | 36.2 mm (1.4 in) |
| 2000 | 38.1 mm (1.5 in) |
| 2001 | 26.7 mm (1.1 in) |
| 2002 | 28.3 mm (1.1 in) |
| 2003 | 24.3 mm (1.0 in) |
| 2004 | 29.5 mm (1.2 in) |
| 2005 | 56.4 mm (2.2 in) |
| 2006 | 60.2 mm (2.4 in) |
| 2007 | 38.4 mm (1.5 in) |
| 2008 | 19.5 mm (0.8 in) |
| 2009 | 30.8 mm (1.2 in) |
| 2010 | 49.0 mm (1.9 in) |
| 2011 | 27.2 mm (1.1 in) |
| 2012 | 43.6 mm (1.7 in) |
| 2013 | 28.9 mm (1.1 in) |
| 2014 | 35.5 mm (1.4 in) |
| 2015 | 27.7 mm (1.1 in) |
| 2016 | 23.9 mm (0.9 in) |
| 2017 | 35.6 mm (1.4 in) |
| 2018 | 25.9 mm (1.0 in) |
| 2019 | 42.0 mm (1.7 in) |
| 2020 | 43.9 mm (1.7 in) |
| 2021 | 34.5 mm (1.4 in) |
| 2022 | 39.2 mm (1.5 in) |
| 2023 | 27.7 mm (1.1 in) |
| 2024 | 80.5 mm (3.2 in) |
| 2025 | 42.8 mm (1.7 in) |
| 2026 | 23.9 mm (0.9 in) |
Longest dry spell (CDD)
| Year | Longest dry spell (CDD) |
|---|---|
| 1958 | 42 days |
| 1959 | 82 days |
| 1960 | 66 days |
| 1961 | 66 days |
| 1962 | 50 days |
| 1963 | 33 days |
| 1964 | 63 days |
| 1965 | 32 days |
| 1966 | 58 days |
| 1967 | 80 days |
| 1968 | 76 days |
| 1969 | 82 days |
| 1970 | 78 days |
| 1971 | 51 days |
| 1972 | 62 days |
| 1973 | 56 days |
| 1974 | 83 days |
| 1975 | 44 days |
| 1976 | 47 days |
| 1977 | 83 days |
| 1978 | 66 days |
| 1979 | 63 days |
| 1980 | 29 days |
| 1981 | 68 days |
| 1982 | 36 days |
| 1983 | 39 days |
| 1984 | 90 days |
| 1985 | 67 days |
| 1986 | 66 days |
| 1987 | 60 days |
| 1988 | 129 days |
| 1989 | 36 days |
| 1990 | 44 days |
| 1991 | 66 days |
| 1992 | 40 days |
| 1993 | 54 days |
| 1994 | 113 days |
| 1995 | 31 days |
| 1996 | 59 days |
| 1997 | 32 days |
| 1998 | 49 days |
| 1999 | 46 days |
| 2000 | 53 days |
| 2001 | 37 days |
| 2002 | 44 days |
| 2003 | 68 days |
| 2004 | 47 days |
| 2005 | 70 days |
| 2006 | 41 days |
| 2007 | 37 days |
| 2008 | 41 days |
| 2009 | 54 days |
| 2010 | 82 days |
| 2011 | 75 days |
| 2012 | 83 days |
| 2013 | 58 days |
| 2014 | 32 days |
| 2015 | 71 days |
| 2016 | 86 days |
| 2017 | 41 days |
| 2018 | 106 days |
| 2019 | 33 days |
| 2020 | 22 days |
| 2021 | 44 days |
| 2022 | 74 days |
| 2023 | 44 days |
| 2024 | 37 days |
| 2025 | 51 days |
| 2026 | 28 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
56 years with a frostAcross 56 years with a frost, the median last spring frost at Pelton Dam falls on 13 May and the median first autumn frost on 4 October, which leaves a median of 141 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 (1989 to 2025) | Recent against earliest | Fitted trend |
|---|---|---|---|---|---|
| Last spring frost | 13 May | n/a | 8 May | n/a | -2.0 days per decade |
| First autumn frost | 4 October | n/a | 10 October | n/a | +2.5 days per decade |
| Growing days | 141 days | n/a | 155 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
61 years, 1959 to 2025A day with at least 20.6 mm (0.8 in) of rain is expected about once in 2 years. A day with at least 64.7 mm (2.5 in) of rain is expected about once in 100 years.
| Expected about once in | A day with at least | Note |
|---|---|---|
| 2 years | 20.6 mm (0.8 in) | |
| 5 years | 28.8 mm (1.1 in) | |
| 10 years | 35.4 mm (1.4 in) | |
| 25 years | 45.5 mm (1.8 in) | |
| 50 years | 54.4 mm (2.1 in) | |
| 100 years | 64.7 mm (2.5 in) | Longer than the 61 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, 61 years of values from 1959 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: 71.1 mm (2.8 in) in 1996; 50.8 mm (2.0 in) in 1964; 45.7 mm (1.8 in) in 1984.
Station Changes
No change in the annual mean temperature of this station was found against its neighbours.
Climate Twins
2005 to 2025 against 1961 to 1990Over 2005 to 2025, Pelton Dam had a mean temperature of 11.4 C (52.6 F) and 259.3 mm (10.2 in) of rain a year. The 3 stations whose 1961 to 1990 climate was closest to that are Pendleton (United States, 216 km away), Lewiston AP (United States, 377 km away) and Mikkalo 6 W (United States, 108 km away).
| Twin station | Country | Distance away | Mean temperature, 1961-1990 | Rain a year, 1961-1990 | Climate difference |
|---|---|---|---|---|---|
| Pendleton | United States | 216 km (134 mi) | 11.3 C (52.3 F) | 306.0 mm (12.0 in) | 0.65 |
| Lewiston AP | United States | 377 km (234 mi) | 11.5 C (52.7 F) | 316.2 mm (12.4 in) | 0.66 |
| Mikkalo 6 W | United States | 108 km (67 mi) | 11.0 C (51.7 F) | 266.1 mm (10.5 in) | 0.77 |
Twins are stations, not cities. A twin is one of the three stations at least 100 km away whose earlier climate is closest to this station's recent one, so a close match does not mean the two places look alike in other ways. A station move or a gap in a record can change that station's averages. The list describes past climate; it is not a forecast and does not say what caused any change. How twins are found, and a search for any station.
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 2026-10-14 (14 October 2026). Records are computed by this site and are not official.
Data as of . Last revised (2026-10-14).