Plain Weather Records (USC00456534)
Record envelope, standing records and threshold days for Plain (USC00456534), Washington, United States, with 90 years of record.
Key Facts for Plain
- Plain (USC00456534) is a weather station in Washington, United States at 47.76 latitude and -120.66 longitude, 565 m (1,855 ft) above sea level.
- The station reports from 1937 to 2026, 90 years of record.
- 1,464 records set at Plain still stand.
- Records are tracked for tmax, tmin, prcp, snow, snwd: an element needs 30 years of data to be eligible.
- Plain set a daily record low maximum temperature of 13.3 C (55.9 F) on 14 September 2026 (provisional).
Provisional Records
Records set in the last 60 days are provisional until they clear the revision window.
About the Station
- Location: Washington, United States, 47.76 latitude, -120.66 longitude.
- Elevation: 565 m (1,855 ft).
- Period of record: 1937 to 2026, 90 years.
- Eligible elements: tmax, tmin, prcp, snow, snwd.
Daily Record Envelope and 2026
3 days at or beyond a record| Month | Highest record high | Lowest record low | 2026 highest maximum | 2026 lowest minimum |
|---|---|---|---|---|
| Jan | 15.0 C (59.0 F) | -34.4 C (-29.9 F) | 12.2 C (54.0 F) | -12.2 C (10.0 F) |
| Feb | 17.8 C (64.0 F) | -35.0 C (-31.0 F) | 10.0 C (50.0 F) | -8.9 C (16.0 F) |
| Mar | 26.7 C (80.1 F) | -25.6 C (-14.1 F) | 17.8 C (64.0 F) | -6.1 C (21.0 F) |
| Apr | 31.1 C (88.0 F) | -8.3 C (17.1 F) | 24.4 C (75.9 F) | -3.9 C (25.0 F) |
| May | 36.7 C (98.1 F) | -7.8 C (18.0 F) | 32.2 C (90.0 F) | 0.0 C (32.0 F) |
| Jun | 42.8 C (109.0 F) | -3.3 C (26.1 F) | 33.3 C (91.9 F) | 1.7 C (35.1 F) |
| Jul | 40.0 C (104.0 F) | -1.7 C (28.9 F) | 38.3 C (100.9 F) | 6.1 C (43.0 F) |
| Aug | 39.4 C (102.9 F) | -1.7 C (28.9 F) | 36.1 C (97.0 F) | 5.6 C (42.1 F) |
| Sep | 38.3 C (100.9 F) | -6.1 C (21.0 F) | 28.9 C (84.0 F) | -0.6 C (30.9 F) |
| Oct | 30.6 C (87.1 F) | -13.3 C (8.1 F) | 21.1 C (70.0 F) | 4.4 C (39.9 F) |
| Nov | 19.4 C (66.9 F) | -21.7 C (-7.1 F) | n/a | n/a |
| Dec | 15.6 C (60.1 F) | -33.3 C (-27.9 F) | n/a | n/a |
Which Years Hold Standing Records
1,464 standing records| Year set | Standing records |
|---|---|
| 1937 | 32 |
| 1938 | 32 |
| 1939 | 22 |
| 1940 | 10 |
| 1941 | 18 |
| 1942 | 19 |
| 1943 | 20 |
| 1944 | 22 |
| 1945 | 26 |
| 1946 | 18 |
| 1947 | 21 |
| 1948 | 20 |
| 1949 | 28 |
| 1950 | 24 |
| 1951 | 14 |
| 1952 | 26 |
| 1953 | 10 |
| 1954 | 25 |
| 1955 | 37 |
| 1956 | 16 |
| 1957 | 18 |
| 1958 | 17 |
| 1959 | 19 |
| 1960 | 13 |
| 1961 | 2 |
| 1962 | 20 |
| 1963 | 9 |
| 1964 | 15 |
| 1965 | 13 |
| 1966 | 14 |
| 1967 | 17 |
| 1968 | 12 |
| 1969 | 14 |
| 1970 | 15 |
| 1971 | 34 |
| 1972 | 26 |
| 1973 | 14 |
| 1974 | 19 |
| 1975 | 10 |
| 1976 | 17 |
| 1977 | 22 |
| 1978 | 11 |
| 1979 | 20 |
| 1980 | 11 |
| 1981 | 19 |
| 1982 | 10 |
| 1983 | 21 |
| 1984 | 10 |
| 1985 | 25 |
| 1986 | 15 |
| 1987 | 13 |
| 1988 | 9 |
| 1989 | 17 |
| 1990 | 16 |
| 1991 | 8 |
| 1992 | 24 |
| 1993 | 15 |
| 1994 | 12 |
| 1995 | 9 |
| 1996 | 18 |
| 1997 | 7 |
| 1998 | 7 |
| 1999 | 11 |
| 2000 | 9 |
| 2001 | 3 |
| 2002 | 20 |
| 2003 | 10 |
| 2004 | 10 |
| 2005 | 10 |
| 2006 | 4 |
| 2007 | 5 |
| 2008 | 13 |
| 2009 | 17 |
| 2010 | 8 |
| 2011 | 8 |
| 2012 | 11 |
| 2013 | 20 |
| 2014 | 19 |
| 2015 | 16 |
| 2016 | 17 |
| 2017 | 10 |
| 2018 | 19 |
| 2019 | 17 |
| 2020 | 19 |
| 2021 | 31 |
| 2022 | 21 |
| 2023 | 13 |
| 2024 | 13 |
| 2025 | 19 |
| 2026 | 14 |
All-Time Record Progression
8 new records| Date | Kind | Detail |
|---|---|---|
| 1996-12-29 | Record daily precipitation | Record daily precipitation 84.6 mm (3.3 in) |
| 1997-01-01 | Record snow depth | Record snow depth 177.8 cm (70.0 in) |
| 2006-11-06 | Record daily precipitation | Record daily precipitation 96.0 mm (3.8 in) |
| 2008-11-12 | Record daily precipitation | Record daily precipitation 104.6 mm (4.1 in) |
| 2009-01-07 | Record daily precipitation | Record daily precipitation 105.2 mm (4.1 in) |
| 2021-06-29 | Record high maximum temperature | Record high maximum temperature 40.6 C (105.1 F) |
| 2021-06-30 | Record high maximum temperature | Record high maximum temperature 42.8 C (109.0 F) |
| 2024-01-15 | Record low maximum temperature | Record low maximum temperature -23.9 C (-11.0 F) |
Wettest Day of Each Month
Jan: 105.2 mm (4.1 in)| Month | Record daily precipitation (mm) | Date |
|---|---|---|
| Jan | 105.2 mm (4.1 in) | 7 January 2009 |
| Feb | 57.9 mm (2.3 in) | 27 February 1972 |
| Mar | 70.1 mm (2.8 in) | 5 March 1972 |
| Apr | 34.5 mm (1.4 in) | 23 April 1940 |
| May | 30.7 mm (1.2 in) | 17 May 2019 |
| Jun | 52.8 mm (2.1 in) | 7 June 1946 |
| Jul | 64.8 mm (2.6 in) | 29 July 2010 |
| Aug | 50.8 mm (2.0 in) | 22 August 2001 |
| Sep | 37.3 mm (1.5 in) | 27 September 1940 |
| Oct | 77.5 mm (3.1 in) | 31 October 1942 |
| Nov | 104.6 mm (4.1 in) | 12 November 2008 |
| Dec | 84.6 mm (3.3 in) | 29 December 1996 |
Period of Record Coverage
1937 to 2026| Year | Days with data | Share of year | Complete |
|---|---|---|---|
| 1937 | 264 | 72% | No |
| 1938 | 319 | 87% | No |
| 1939 | 359 | 98% | Yes |
| 1940 | 335 | 92% | Yes |
| 1941 | 332 | 91% | Yes |
| 1942 | 365 | 100% | Yes |
| 1943 | 240 | 66% | No |
| 1944 | 366 | 100% | Yes |
| 1945 | 358 | 98% | Yes |
| 1946 | 358 | 98% | Yes |
| 1947 | 262 | 72% | No |
| 1948 | 353 | 96% | Yes |
| 1949 | 362 | 99% | Yes |
| 1950 | 346 | 95% | Yes |
| 1951 | 243 | 67% | No |
| 1952 | 362 | 99% | Yes |
| 1953 | 340 | 93% | Yes |
| 1954 | 360 | 99% | Yes |
| 1955 | 363 | 99% | Yes |
| 1956 | 362 | 99% | Yes |
| 1957 | 332 | 91% | Yes |
| 1958 | 272 | 75% | No |
| 1959 | 364 | 100% | Yes |
| 1960 | 285 | 78% | No |
| 1961 | 100 | 27% | No |
| 1962 | 266 | 73% | No |
| 1963 | 141 | 39% | No |
| 1964 | 321 | 88% | No |
| 1965 | 324 | 89% | No |
| 1966 | 329 | 90% | Yes |
| 1967 | 274 | 75% | No |
| 1968 | 245 | 67% | No |
| 1969 | 349 | 96% | Yes |
| 1970 | 351 | 96% | Yes |
| 1971 | 365 | 100% | Yes |
| 1972 | 364 | 99% | Yes |
| 1973 | 365 | 100% | Yes |
| 1974 | 365 | 100% | Yes |
| 1975 | 365 | 100% | Yes |
| 1976 | 366 | 100% | Yes |
| 1977 | 365 | 100% | Yes |
| 1978 | 363 | 99% | Yes |
| 1979 | 364 | 100% | Yes |
| 1980 | 366 | 100% | Yes |
| 1981 | 365 | 100% | Yes |
| 1982 | 365 | 100% | Yes |
| 1983 | 364 | 100% | Yes |
| 1984 | 366 | 100% | Yes |
| 1985 | 365 | 100% | Yes |
| 1986 | 364 | 100% | Yes |
| 1987 | 363 | 99% | Yes |
| 1988 | 364 | 99% | Yes |
| 1989 | 361 | 99% | Yes |
| 1990 | 364 | 100% | Yes |
| 1991 | 364 | 100% | Yes |
| 1992 | 364 | 99% | Yes |
| 1993 | 365 | 100% | Yes |
| 1994 | 364 | 100% | Yes |
| 1995 | 364 | 100% | Yes |
| 1996 | 366 | 100% | Yes |
| 1997 | 364 | 100% | Yes |
| 1998 | 364 | 100% | Yes |
| 1999 | 364 | 100% | Yes |
| 2000 | 364 | 99% | Yes |
| 2001 | 364 | 100% | Yes |
| 2002 | 365 | 100% | Yes |
| 2003 | 364 | 100% | Yes |
| 2004 | 366 | 100% | Yes |
| 2005 | 364 | 100% | Yes |
| 2006 | 363 | 99% | Yes |
| 2007 | 362 | 99% | Yes |
| 2008 | 355 | 97% | Yes |
| 2009 | 350 | 96% | Yes |
| 2010 | 360 | 99% | Yes |
| 2011 | 364 | 100% | Yes |
| 2012 | 336 | 92% | Yes |
| 2013 | 353 | 97% | Yes |
| 2014 | 352 | 96% | Yes |
| 2015 | 347 | 95% | Yes |
| 2016 | 359 | 98% | Yes |
| 2017 | 359 | 98% | Yes |
| 2018 | 357 | 98% | Yes |
| 2019 | 358 | 98% | Yes |
| 2020 | 356 | 97% | Yes |
| 2021 | 355 | 97% | Yes |
| 2022 | 351 | 96% | Yes |
| 2023 | 336 | 92% | Yes |
| 2024 | 336 | 92% | Yes |
| 2025 | 330 | 90% | Yes |
| 2026 | 268 | 73% | No |
Latest Records
20| Date | Station | Record | Value | Beat old record by | Old record stood | Significance |
|---|---|---|---|---|---|---|
| 14 September 2026 | Plain, US | daily low max (Provisional) | 13.3 C (55.9 F) | 0.6 C (1.1 F) | 84 years | 35 of 100 (Notable) |
| 13 September 2026 | Plain, US | daily rain (Provisional) | 25.7 mm (1.0 in) | 14.3 mm (0.6 in) | 84 years | 65 of 100 (Major) |
| 23 August 2026 | Plain, US | daily high min (Tie, Provisional) | 16.1 C (61.0 F) | tie | 59 years | 6 of 100 (Routine) |
| 23 July 2026 | Plain, US | all-time high min (Tie) | 20.6 C (69.1 F) | tie | 83 years | 13 of 100 (Routine) |
| 23 July 2026 | Plain, US | daily high max | 38.3 C (100.9 F) | 1.1 C (2.0 F) | 1 year | 11 of 100 (Routine) |
| 16 June 2026 | Plain, US | daily high max | 33.3 C (91.9 F) | 1.6 C (2.9 F) | 68 years | 32 of 100 (Routine) |
| 6 May 2026 | Plain, US | daily high min | 9.4 C (48.9 F) | 0.5 C (0.9 F) | 60 years | 28 of 100 (Routine) |
| 22 April 2026 | Plain, US | daily high min (Tie) | 7.8 C (46.0 F) | tie | 9 years | 2 of 100 (Routine) |
| 25 March 2026 | Plain, US | daily rain | 15.5 mm (0.6 in) | 2.8 mm (0.11 in) | 16 years | 18 of 100 (Routine) |
| 20 March 2026 | Plain, US | daily high min | 6.1 C (43.0 F) | 3.3 C (5.9 F) | 37 years | 29 of 100 (Routine) |
| 19 March 2026 | Plain, US | daily high min | 5.6 C (42.1 F) | 1.2 C (2.2 F) | 36 years | 22 of 100 (Routine) |
| 18 March 2026 | Plain, US | daily high min | 2.8 C (37.0 F) | 0.6 C (1.1 F) | 63 years | 28 of 100 (Routine) |
| 14 March 2026 | Plain, US | daily low max | 1.7 C (35.1 F) | 0.5 C (0.9 F) | 76 years | 33 of 100 (Routine) |
| 14 March 2026 | Plain, US | daily snowfall | 10.9 cm (4.3 in) | 3.3 cm (1.3 in) | 61 years | 33 of 100 (Routine) |
| 14 March 2026 | Plain, US | daily rain | 17.3 mm (0.7 in) | 2.1 mm (0.08 in) | 15 years | 16 of 100 (Routine) |
| 13 March 2026 | Plain, US | daily rain | 20.8 mm (0.8 in) | 2.5 mm (0.10 in) | 45 years | 20 of 100 (Routine) |
| 13 March 2026 | Plain, US | daily snowfall | 24.4 cm (9.6 in) | 6.1 cm (2.4 in) | 13 years | 24 of 100 (Routine) |
| 12 March 2026 | Plain, US | daily rain | 37.6 mm (1.5 in) | 21.6 mm (0.9 in) | 23 years | 50 of 100 (Notable) |
| 8 March 2026 | Plain, US | daily high min | 6.1 C (43.0 F) | 4.4 C (7.9 F) | 59 years | 38 of 100 (Notable) |
| 7 March 2026 | Plain, US | daily high min | 6.1 C (43.0 F) | 2.8 C (5.0 F) | 20 years | 23 of 100 (Routine) |
Climate Trend
66 complete years, 1939 to 2025| Year | Annual mean temperature | Difference from the station mean |
|---|---|---|
| 1939 | 8.0 C | +0.48 C |
| 1942 | 7.8 C | +0.19 C |
| 1944 | 7.6 C | +0.08 C |
| 1945 | 7.9 C | +0.29 C |
| 1946 | 7.3 C | -0.27 C |
| 1948 | 6.1 C | -1.46 C |
| 1949 | 6.0 C | -1.57 C |
| 1952 | 7.0 C | -0.57 C |
| 1954 | 6.3 C | -1.26 C |
| 1955 | 5.4 C | -2.14 C |
| 1959 | 7.1 C | -0.43 C |
| 1964 | 6.9 C | -0.67 C |
| 1971 | 7.0 C | -0.60 C |
| 1972 | 6.7 C | -0.87 C |
| 1973 | 7.6 C | +0.03 C |
| 1974 | 7.7 C | +0.12 C |
| 1975 | 6.9 C | -0.67 C |
| 1976 | 7.5 C | -0.03 C |
| 1977 | 7.7 C | +0.15 C |
| 1978 | 7.7 C | +0.16 C |
| 1979 | 7.7 C | +0.11 C |
| 1980 | 7.6 C | +0.03 C |
| 1981 | 8.3 C | +0.72 C |
| 1982 | 7.1 C | -0.49 C |
| 1983 | 7.7 C | +0.09 C |
| 1984 | 7.1 C | -0.49 C |
| 1985 | 6.5 C | -1.07 C |
| 1986 | 8.0 C | +0.44 C |
| 1987 | 8.4 C | +0.81 C |
| 1988 | 7.8 C | +0.22 C |
| 1989 | 7.6 C | +0.07 C |
| 1990 | 7.8 C | +0.25 C |
| 1991 | 7.7 C | +0.12 C |
| 1992 | 8.5 C | +0.96 C |
| 1993 | 6.8 C | -0.74 C |
| 1994 | 8.1 C | +0.50 C |
| 1995 | 7.4 C | -0.21 C |
| 1996 | 6.3 C | -1.23 C |
| 1997 | 7.4 C | -0.13 C |
| 1998 | 8.4 C | +0.87 C |
| 1999 | 7.5 C | -0.05 C |
| 2000 | 7.0 C | -0.54 C |
| 2001 | 7.6 C | +0.07 C |
| 2002 | 7.6 C | +0.08 C |
| 2003 | 8.1 C | +0.55 C |
| 2004 | 8.5 C | +0.97 C |
| 2005 | 7.8 C | +0.24 C |
| 2006 | 7.7 C | +0.15 C |
| 2007 | 7.4 C | -0.13 C |
| 2008 | 6.8 C | -0.77 C |
| 2009 | 7.5 C | -0.02 C |
| 2010 | 7.9 C | +0.29 C |
| 2011 | 6.9 C | -0.70 C |
| 2012 | 7.7 C | +0.13 C |
| 2013 | 8.1 C | +0.56 C |
| 2014 | 8.3 C | +0.77 C |
| 2015 | 9.3 C | +1.72 C |
| 2016 | 8.5 C | +0.94 C |
| 2017 | 7.3 C | -0.23 C |
| 2018 | 8.5 C | +0.89 C |
| 2019 | 7.2 C | -0.32 C |
| 2020 | 8.5 C | +0.90 C |
| 2021 | 8.4 C | +0.80 C |
| 2022 | 7.4 C | -0.20 C |
| 2023 | 8.4 C | +0.85 C |
| 2025 | 9.1 C | +1.51 C |
The annual mean temperature here has risen by 0.1 C (0.1 to 0.2) per decade over 1939 to 2025. In Fahrenheit: 0.3 F (0.1 to 0.4) per decade. The slope is a straight line fitted to 66 complete years; the brackets give its 95 percent interval.
| Measure | Per decade (C) | Per decade (F) | Period | Complete years | Reading |
|---|---|---|---|---|---|
| Annual mean temperature | 0.1 C (0.1 to 0.2) per decade | 0.3 F (0.1 to 0.4) per decade | 1939 to 2025 | 66 | Rise |
| Mean daily maximum | -0.04 C (-0.13 to 0.05) per decade | -0.1 F (-0.2 to 0.1) per decade | 1939 to 2025 | 66 | Not clearly different from zero |
| Mean daily minimum | 0.3 C (0.3 to 0.4) per decade | 0.6 F (0.5 to 0.7) per decade | 1939 to 2025 | 66 | 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
1937 to 2026| Measure | Record | Year of the record | Median year | Years with a value |
|---|---|---|---|---|
| Hottest day (TXx) | 42.8 C (109.0 F) | 2021 | 36.7 C (98.1 F) | 90 |
| Coldest night (TNn) | -35.0 C (-31.0 F) | 1950 | -20.8 C (-5.5 F) | 90 |
| Wettest day (Rx1day) | 105.2 mm (4.1 in) | 2009 | 44.8 mm (1.8 in) | 90 |
| Wettest five days (Rx5day) | 190.9 mm (7.5 in) | 1946 | 79.4 mm (3.1 in) | 90 |
| Longest dry spell (CDD) | 99 days | 2003 | 41 days | 90 |
Hottest day (TXx)
| Year | Hottest day (TXx) |
|---|---|
| 1937 | 36.7 C (98.1 F) |
| 1938 | 38.9 C (102.0 F) |
| 1939 | 40.0 C (104.0 F) |
| 1940 | 34.4 C (93.9 F) |
| 1941 | 39.4 C (102.9 F) |
| 1942 | 37.2 C (99.0 F) |
| 1943 | 34.4 C (93.9 F) |
| 1944 | 37.2 C (99.0 F) |
| 1945 | 35.6 C (96.1 F) |
| 1946 | 35.6 C (96.1 F) |
| 1947 | 33.3 C (91.9 F) |
| 1948 | 34.4 C (93.9 F) |
| 1949 | 35.6 C (96.1 F) |
| 1950 | 33.9 C (93.0 F) |
| 1951 | 34.4 C (93.9 F) |
| 1952 | 36.7 C (98.1 F) |
| 1953 | 36.1 C (97.0 F) |
| 1954 | 34.4 C (93.9 F) |
| 1955 | 36.7 C (98.1 F) |
| 1956 | 37.2 C (99.0 F) |
| 1957 | 32.8 C (91.0 F) |
| 1958 | 36.7 C (98.1 F) |
| 1959 | 38.9 C (102.0 F) |
| 1960 | 38.9 C (102.0 F) |
| 1961 | 18.3 C (64.9 F) |
| 1962 | 36.1 C (97.0 F) |
| 1963 | 19.4 C (66.9 F) |
| 1964 | 35.0 C (95.0 F) |
| 1965 | 38.3 C (100.9 F) |
| 1966 | 36.7 C (98.1 F) |
| 1967 | 37.2 C (99.0 F) |
| 1968 | 37.2 C (99.0 F) |
| 1969 | 35.0 C (95.0 F) |
| 1970 | 37.2 C (99.0 F) |
| 1971 | 37.8 C (100.0 F) |
| 1972 | 37.8 C (100.0 F) |
| 1973 | 36.1 C (97.0 F) |
| 1974 | 35.6 C (96.1 F) |
| 1975 | 38.3 C (100.9 F) |
| 1976 | 33.3 C (91.9 F) |
| 1977 | 37.8 C (100.0 F) |
| 1978 | 37.2 C (99.0 F) |
| 1979 | 37.8 C (100.0 F) |
| 1980 | 35.0 C (95.0 F) |
| 1981 | 37.8 C (100.0 F) |
| 1982 | 37.8 C (100.0 F) |
| 1983 | 36.1 C (97.0 F) |
| 1984 | 36.1 C (97.0 F) |
| 1985 | 36.7 C (98.1 F) |
| 1986 | 36.7 C (98.1 F) |
| 1987 | 35.6 C (96.1 F) |
| 1988 | 36.7 C (98.1 F) |
| 1989 | 34.4 C (93.9 F) |
| 1990 | 36.7 C (98.1 F) |
| 1991 | 33.9 C (93.0 F) |
| 1992 | 36.7 C (98.1 F) |
| 1993 | 33.9 C (93.0 F) |
| 1994 | 37.8 C (100.0 F) |
| 1995 | 34.4 C (93.9 F) |
| 1996 | 35.6 C (96.1 F) |
| 1997 | 35.0 C (95.0 F) |
| 1998 | 37.2 C (99.0 F) |
| 1999 | 35.0 C (95.0 F) |
| 2000 | 35.6 C (96.1 F) |
| 2001 | 35.6 C (96.1 F) |
| 2002 | 35.0 C (95.0 F) |
| 2003 | 36.7 C (98.1 F) |
| 2004 | 36.1 C (97.0 F) |
| 2005 | 34.4 C (93.9 F) |
| 2006 | 36.7 C (98.1 F) |
| 2007 | 36.1 C (97.0 F) |
| 2008 | 36.1 C (97.0 F) |
| 2009 | 36.7 C (98.1 F) |
| 2010 | 33.9 C (93.0 F) |
| 2011 | 35.0 C (95.0 F) |
| 2012 | 36.7 C (98.1 F) |
| 2013 | 34.4 C (93.9 F) |
| 2014 | 37.2 C (99.0 F) |
| 2015 | 38.3 C (100.9 F) |
| 2016 | 35.6 C (96.1 F) |
| 2017 | 37.2 C (99.0 F) |
| 2018 | 37.8 C (100.0 F) |
| 2019 | 35.6 C (96.1 F) |
| 2020 | 37.8 C (100.0 F) |
| 2021 | 42.8 C (109.0 F) |
| 2022 | 38.9 C (102.0 F) |
| 2023 | 39.4 C (102.9 F) |
| 2024 | 38.9 C (102.0 F) |
| 2025 | 38.3 C (100.9 F) |
| 2026 | 38.3 C (100.9 F) |
Coldest night (TNn)
| Year | Coldest night (TNn) |
|---|---|
| 1937 | -13.3 C (8.1 F) |
| 1938 | -17.8 C (0.0 F) |
| 1939 | -24.4 C (-11.9 F) |
| 1940 | -17.8 C (0.0 F) |
| 1941 | -21.1 C (-6.0 F) |
| 1942 | -24.4 C (-11.9 F) |
| 1943 | -30.0 C (-22.0 F) |
| 1944 | -19.4 C (-2.9 F) |
| 1945 | -17.2 C (1.0 F) |
| 1946 | -18.9 C (-2.0 F) |
| 1947 | -20.6 C (-5.1 F) |
| 1948 | -22.2 C (-8.0 F) |
| 1949 | -30.0 C (-22.0 F) |
| 1950 | -35.0 C (-31.0 F) |
| 1951 | -26.7 C (-16.1 F) |
| 1952 | -27.8 C (-18.0 F) |
| 1953 | -12.8 C (9.0 F) |
| 1954 | -25.6 C (-14.1 F) |
| 1955 | -25.6 C (-14.1 F) |
| 1956 | -28.9 C (-20.0 F) |
| 1957 | -30.6 C (-23.1 F) |
| 1958 | -18.3 C (-0.9 F) |
| 1959 | -26.7 C (-16.1 F) |
| 1960 | -19.4 C (-2.9 F) |
| 1961 | -15.6 C (3.9 F) |
| 1962 | -31.1 C (-24.0 F) |
| 1963 | -21.1 C (-6.0 F) |
| 1964 | -30.0 C (-22.0 F) |
| 1965 | -18.9 C (-2.0 F) |
| 1966 | -16.1 C (3.0 F) |
| 1967 | -9.4 C (15.1 F) |
| 1968 | -33.3 C (-27.9 F) |
| 1969 | -25.0 C (-13.0 F) |
| 1970 | -17.8 C (0.0 F) |
| 1971 | -22.8 C (-9.0 F) |
| 1972 | -25.6 C (-14.1 F) |
| 1973 | -22.8 C (-9.0 F) |
| 1974 | -22.8 C (-9.0 F) |
| 1975 | -15.0 C (5.0 F) |
| 1976 | -18.3 C (-0.9 F) |
| 1977 | -20.6 C (-5.1 F) |
| 1978 | -30.0 C (-22.0 F) |
| 1979 | -28.9 C (-20.0 F) |
| 1980 | -31.1 C (-24.0 F) |
| 1981 | -20.0 C (-4.0 F) |
| 1982 | -23.3 C (-9.9 F) |
| 1983 | -29.4 C (-20.9 F) |
| 1984 | -22.2 C (-8.0 F) |
| 1985 | -23.9 C (-11.0 F) |
| 1986 | -21.1 C (-6.0 F) |
| 1987 | -18.3 C (-0.9 F) |
| 1988 | -20.0 C (-4.0 F) |
| 1989 | -26.7 C (-16.1 F) |
| 1990 | -27.8 C (-18.0 F) |
| 1991 | -17.8 C (0.0 F) |
| 1992 | -17.2 C (1.0 F) |
| 1993 | -23.3 C (-9.9 F) |
| 1994 | -20.0 C (-4.0 F) |
| 1995 | -21.1 C (-6.0 F) |
| 1996 | -27.2 C (-17.0 F) |
| 1997 | -19.4 C (-2.9 F) |
| 1998 | -21.1 C (-6.0 F) |
| 1999 | -11.7 C (10.9 F) |
| 2000 | -17.2 C (1.0 F) |
| 2001 | -14.4 C (6.1 F) |
| 2002 | -15.0 C (5.0 F) |
| 2003 | -15.6 C (3.9 F) |
| 2004 | -24.4 C (-11.9 F) |
| 2005 | -18.3 C (-0.9 F) |
| 2006 | -20.0 C (-4.0 F) |
| 2007 | -18.9 C (-2.0 F) |
| 2008 | -22.2 C (-8.0 F) |
| 2009 | -18.9 C (-2.0 F) |
| 2010 | -19.4 C (-2.9 F) |
| 2011 | -20.6 C (-5.1 F) |
| 2012 | -15.0 C (5.0 F) |
| 2013 | -21.7 C (-7.1 F) |
| 2014 | -24.4 C (-11.9 F) |
| 2015 | -16.1 C (3.0 F) |
| 2016 | -19.4 C (-2.9 F) |
| 2017 | -25.0 C (-13.0 F) |
| 2018 | -18.3 C (-0.9 F) |
| 2019 | -20.6 C (-5.1 F) |
| 2020 | -19.4 C (-2.9 F) |
| 2021 | -19.4 C (-2.9 F) |
| 2022 | -25.6 C (-14.1 F) |
| 2023 | -18.3 C (-0.9 F) |
| 2024 | -27.8 C (-18.0 F) |
| 2025 | -21.7 C (-7.1 F) |
| 2026 | -12.2 C (10.0 F) |
Wettest day (Rx1day)
| Year | Wettest day (Rx1day) |
|---|---|
| 1937 | 42.2 mm (1.7 in) |
| 1938 | 41.4 mm (1.6 in) |
| 1939 | 27.9 mm (1.1 in) |
| 1940 | 37.3 mm (1.5 in) |
| 1941 | 23.4 mm (0.9 in) |
| 1942 | 77.5 mm (3.1 in) |
| 1943 | 53.3 mm (2.1 in) |
| 1944 | 24.9 mm (1.0 in) |
| 1945 | 45.7 mm (1.8 in) |
| 1946 | 73.7 mm (2.9 in) |
| 1947 | 36.6 mm (1.4 in) |
| 1948 | 48.3 mm (1.9 in) |
| 1949 | 46.0 mm (1.8 in) |
| 1950 | 40.9 mm (1.6 in) |
| 1951 | 55.9 mm (2.2 in) |
| 1952 | 18.0 mm (0.7 in) |
| 1953 | 51.3 mm (2.0 in) |
| 1954 | 49.5 mm (1.9 in) |
| 1955 | 57.4 mm (2.3 in) |
| 1956 | 41.1 mm (1.6 in) |
| 1957 | 27.9 mm (1.1 in) |
| 1958 | 41.7 mm (1.6 in) |
| 1959 | 53.8 mm (2.1 in) |
| 1960 | 47.2 mm (1.9 in) |
| 1961 | 26.4 mm (1.0 in) |
| 1962 | 63.0 mm (2.5 in) |
| 1963 | 48.3 mm (1.9 in) |
| 1964 | 75.9 mm (3.0 in) |
| 1965 | 56.9 mm (2.2 in) |
| 1966 | 27.4 mm (1.1 in) |
| 1967 | 56.9 mm (2.2 in) |
| 1968 | 39.1 mm (1.5 in) |
| 1969 | 23.1 mm (0.9 in) |
| 1970 | 29.0 mm (1.1 in) |
| 1971 | 48.0 mm (1.9 in) |
| 1972 | 70.1 mm (2.8 in) |
| 1973 | 32.0 mm (1.3 in) |
| 1974 | 62.2 mm (2.4 in) |
| 1975 | 50.8 mm (2.0 in) |
| 1976 | 38.1 mm (1.5 in) |
| 1977 | 53.3 mm (2.1 in) |
| 1978 | 18.5 mm (0.7 in) |
| 1979 | 46.5 mm (1.8 in) |
| 1980 | 39.6 mm (1.6 in) |
| 1981 | 43.9 mm (1.7 in) |
| 1982 | 56.6 mm (2.2 in) |
| 1983 | 33.8 mm (1.3 in) |
| 1984 | 30.2 mm (1.2 in) |
| 1985 | 23.9 mm (0.9 in) |
| 1986 | 60.5 mm (2.4 in) |
| 1987 | 60.2 mm (2.4 in) |
| 1988 | 37.1 mm (1.5 in) |
| 1989 | 34.8 mm (1.4 in) |
| 1990 | 57.2 mm (2.3 in) |
| 1991 | 55.9 mm (2.2 in) |
| 1992 | 34.5 mm (1.4 in) |
| 1993 | 32.3 mm (1.3 in) |
| 1994 | 54.6 mm (2.1 in) |
| 1995 | 57.2 mm (2.3 in) |
| 1996 | 84.6 mm (3.3 in) |
| 1997 | 38.9 mm (1.5 in) |
| 1998 | 43.2 mm (1.7 in) |
| 1999 | 34.5 mm (1.4 in) |
| 2000 | 41.9 mm (1.6 in) |
| 2001 | 50.8 mm (2.0 in) |
| 2002 | 29.7 mm (1.2 in) |
| 2003 | 55.1 mm (2.2 in) |
| 2004 | 34.8 mm (1.4 in) |
| 2005 | 31.8 mm (1.3 in) |
| 2006 | 96.0 mm (3.8 in) |
| 2007 | 76.2 mm (3.0 in) |
| 2008 | 104.6 mm (4.1 in) |
| 2009 | 105.2 mm (4.1 in) |
| 2010 | 64.8 mm (2.6 in) |
| 2011 | 42.7 mm (1.7 in) |
| 2012 | 46.5 mm (1.8 in) |
| 2013 | 45.7 mm (1.8 in) |
| 2014 | 42.4 mm (1.7 in) |
| 2015 | 53.3 mm (2.1 in) |
| 2016 | 25.7 mm (1.0 in) |
| 2017 | 57.2 mm (2.3 in) |
| 2018 | 23.9 mm (0.9 in) |
| 2019 | 33.8 mm (1.3 in) |
| 2020 | 27.7 mm (1.1 in) |
| 2021 | 33.0 mm (1.3 in) |
| 2022 | 54.6 mm (2.1 in) |
| 2023 | 35.1 mm (1.4 in) |
| 2024 | 66.0 mm (2.6 in) |
| 2025 | 63.5 mm (2.5 in) |
| 2026 | 37.6 mm (1.5 in) |
Wettest five days (Rx5day)
| Year | Wettest five days (Rx5day) |
|---|---|
| 1937 | 103.6 mm (4.1 in) |
| 1938 | 57.4 mm (2.3 in) |
| 1939 | 62.6 mm (2.5 in) |
| 1940 | 51.1 mm (2.0 in) |
| 1941 | 64.5 mm (2.5 in) |
| 1942 | 125.7 mm (4.9 in) |
| 1943 | 89.7 mm (3.5 in) |
| 1944 | 43.7 mm (1.7 in) |
| 1945 | 79.9 mm (3.1 in) |
| 1946 | 190.9 mm (7.5 in) |
| 1947 | 71.4 mm (2.8 in) |
| 1948 | 62.2 mm (2.4 in) |
| 1949 | 96.6 mm (3.8 in) |
| 1950 | 97.9 mm (3.9 in) |
| 1951 | 77.3 mm (3.0 in) |
| 1952 | 34.6 mm (1.4 in) |
| 1953 | 112.7 mm (4.4 in) |
| 1954 | 75.4 mm (3.0 in) |
| 1955 | 99.3 mm (3.9 in) |
| 1956 | 69.6 mm (2.7 in) |
| 1957 | 47.2 mm (1.9 in) |
| 1958 | 57.1 mm (2.2 in) |
| 1959 | 96.4 mm (3.8 in) |
| 1960 | 47.2 mm (1.9 in) |
| 1961 | 51.3 mm (2.0 in) |
| 1962 | 98.0 mm (3.9 in) |
| 1963 | 58.5 mm (2.3 in) |
| 1964 | 110.4 mm (4.3 in) |
| 1965 | 104.7 mm (4.1 in) |
| 1966 | 43.8 mm (1.7 in) |
| 1967 | 72.6 mm (2.9 in) |
| 1968 | 78.2 mm (3.1 in) |
| 1969 | 66.6 mm (2.6 in) |
| 1970 | 78.4 mm (3.1 in) |
| 1971 | 95.8 mm (3.8 in) |
| 1972 | 129.7 mm (5.1 in) |
| 1973 | 66.5 mm (2.6 in) |
| 1974 | 149.3 mm (5.9 in) |
| 1975 | 174.5 mm (6.9 in) |
| 1976 | 63.9 mm (2.5 in) |
| 1977 | 123.9 mm (4.9 in) |
| 1978 | 43.4 mm (1.7 in) |
| 1979 | 95.3 mm (3.8 in) |
| 1980 | 82.3 mm (3.2 in) |
| 1981 | 87.4 mm (3.4 in) |
| 1982 | 112.8 mm (4.4 in) |
| 1983 | 94.5 mm (3.7 in) |
| 1984 | 55.4 mm (2.2 in) |
| 1985 | 65.1 mm (2.6 in) |
| 1986 | 105.5 mm (4.2 in) |
| 1987 | 105.2 mm (4.1 in) |
| 1988 | 82.3 mm (3.2 in) |
| 1989 | 47.0 mm (1.9 in) |
| 1990 | 158.0 mm (6.2 in) |
| 1991 | 85.1 mm (3.4 in) |
| 1992 | 60.3 mm (2.4 in) |
| 1993 | 54.3 mm (2.1 in) |
| 1994 | 90.2 mm (3.6 in) |
| 1995 | 138.2 mm (5.4 in) |
| 1996 | 149.4 mm (5.9 in) |
| 1997 | 149.1 mm (5.9 in) |
| 1998 | 146.3 mm (5.8 in) |
| 1999 | 79.0 mm (3.1 in) |
| 2000 | 51.8 mm (2.0 in) |
| 2001 | 69.4 mm (2.7 in) |
| 2002 | 57.2 mm (2.3 in) |
| 2003 | 95.0 mm (3.7 in) |
| 2004 | 65.3 mm (2.6 in) |
| 2005 | 68.9 mm (2.7 in) |
| 2006 | 175.3 mm (6.9 in) |
| 2007 | 128.0 mm (5.0 in) |
| 2008 | 119.6 mm (4.7 in) |
| 2009 | 157.6 mm (6.2 in) |
| 2010 | 79.8 mm (3.1 in) |
| 2011 | 86.6 mm (3.4 in) |
| 2012 | 86.1 mm (3.4 in) |
| 2013 | 62.5 mm (2.5 in) |
| 2014 | 72.6 mm (2.9 in) |
| 2015 | 114.9 mm (4.5 in) |
| 2016 | 47.3 mm (1.9 in) |
| 2017 | 76.7 mm (3.0 in) |
| 2018 | 54.9 mm (2.2 in) |
| 2019 | 53.1 mm (2.1 in) |
| 2020 | 61.4 mm (2.4 in) |
| 2021 | 77.3 mm (3.0 in) |
| 2022 | 99.3 mm (3.9 in) |
| 2023 | 49.7 mm (2.0 in) |
| 2024 | 78.2 mm (3.1 in) |
| 2025 | 172.3 mm (6.8 in) |
| 2026 | 80.6 mm (3.2 in) |
Longest dry spell (CDD)
| Year | Longest dry spell (CDD) |
|---|---|
| 1937 | 29 days |
| 1938 | 59 days |
| 1939 | 42 days |
| 1940 | 42 days |
| 1941 | 22 days |
| 1942 | 79 days |
| 1943 | 56 days |
| 1944 | 31 days |
| 1945 | 64 days |
| 1946 | 48 days |
| 1947 | 41 days |
| 1948 | 35 days |
| 1949 | 49 days |
| 1950 | 57 days |
| 1951 | 53 days |
| 1952 | 62 days |
| 1953 | 57 days |
| 1954 | 47 days |
| 1955 | 44 days |
| 1956 | 34 days |
| 1957 | 44 days |
| 1958 | 33 days |
| 1959 | 78 days |
| 1960 | 67 days |
| 1961 | 13 days |
| 1962 | 27 days |
| 1963 | 29 days |
| 1964 | 31 days |
| 1965 | 30 days |
| 1966 | 57 days |
| 1967 | 79 days |
| 1968 | 68 days |
| 1969 | 76 days |
| 1970 | 79 days |
| 1971 | 42 days |
| 1972 | 31 days |
| 1973 | 48 days |
| 1974 | 53 days |
| 1975 | 31 days |
| 1976 | 23 days |
| 1977 | 45 days |
| 1978 | 45 days |
| 1979 | 34 days |
| 1980 | 42 days |
| 1981 | 32 days |
| 1982 | 23 days |
| 1983 | 29 days |
| 1984 | 40 days |
| 1985 | 53 days |
| 1986 | 37 days |
| 1987 | 56 days |
| 1988 | 33 days |
| 1989 | 39 days |
| 1990 | 22 days |
| 1991 | 32 days |
| 1992 | 43 days |
| 1993 | 24 days |
| 1994 | 42 days |
| 1995 | 23 days |
| 1996 | 36 days |
| 1997 | 25 days |
| 1998 | 47 days |
| 1999 | 43 days |
| 2000 | 63 days |
| 2001 | 33 days |
| 2002 | 33 days |
| 2003 | 99 days |
| 2004 | 19 days |
| 2005 | 27 days |
| 2006 | 63 days |
| 2007 | 41 days |
| 2008 | 59 days |
| 2009 | 41 days |
| 2010 | 38 days |
| 2011 | 63 days |
| 2012 | 20 days |
| 2013 | 23 days |
| 2014 | 34 days |
| 2015 | 40 days |
| 2016 | 24 days |
| 2017 | 57 days |
| 2018 | 47 days |
| 2019 | 29 days |
| 2020 | 76 days |
| 2021 | 37 days |
| 2022 | 43 days |
| 2023 | 14 days |
| 2024 | 30 days |
| 2025 | 47 days |
| 2026 | 32 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
66 years with a frostAcross 66 years with a frost, the median last spring frost at Plain falls on 25 May and the median first autumn frost on 17 September, which leaves a median of 111 days between them.
In 1995 to 2025 the median growing season was 127 days. That is 29 days more than in 1939 to 1988.
Fitted over all years, the growing season changes by +8.1 days per decade at this station.
| Measure | Median, all years | Earliest period (1939 to 1988) | Recent period (1995 to 2025) | Recent against earliest | Fitted trend |
|---|---|---|---|---|---|
| Last spring frost | 25 May | 2 June | 20 May | 13 days earlier | -3.9 days per decade |
| First autumn frost | 17 September | 11 September | 22 September | 11 days later | +4.3 days per decade |
| Growing days | 111 days | 98 days | 127 days | 29 days more | +8.1 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
72 years, 1938 to 2024A day with at least 44.9 mm (1.8 in) of rain is expected about once in 2 years. A day with at least 108.1 mm (4.3 in) of rain is expected about once in 100 years.
| Expected about once in | A day with at least | Note |
|---|---|---|
| 2 years | 44.9 mm (1.8 in) | |
| 5 years | 61.4 mm (2.4 in) | |
| 10 years | 72.5 mm (2.9 in) | |
| 25 years | 86.7 mm (3.4 in) | |
| 50 years | 97.4 mm (3.8 in) | |
| 100 years | 108.1 mm (4.3 in) | Longer than the 72 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, 72 years of values from 1938 to 2024.
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: 105.2 mm (4.1 in) in 2009; 104.6 mm (4.1 in) in 2008; 96.0 mm (3.8 in) in 2006.
Station Changes
1 suspectedOne change was suspected in the annual mean temperature of Plain, at 1986. Each is measured against neighbouring stations.
- Relative to 5 neighbouring stations, the station's annual mean temperature from 1986 ran 0.3 C (0.5 F) lower than in the years before (likely change).
| Year | Shift (C) | Shift (F) | Strength | Neighbours |
|---|---|---|---|---|
| 1986 | -0.2 | -0.4 | likely | 5 |
Possible change at the station (a move, a new instrument or a new site); the record is kept as measured. A "likely" change has a larger test statistic than a "possible" one. Neither says why the station differs from its neighbours. How changes are found, and the largest ones.
Climate Twins
2010 to 2025 against 1961 to 1990Over 2010 to 2025, Plain had a mean temperature of 8.1 C (46.6 F) and 623.0 mm (24.5 in) of rain a year. The 3 stations whose 1961 to 1990 climate was closest to that are Mtn Dell Dam (United States, 1,054 km away), Creston (Canada, 340 km away) and Thompson Falls Ph (United States, 397 km away).
| Twin station | Country | Distance away | Mean temperature, 1961-1990 | Rain a year, 1961-1990 | Climate difference |
|---|---|---|---|---|---|
| Mtn Dell Dam | United States | 1,054 km (655 mi) | 8.1 C (46.7 F) | 612.7 mm (24.1 in) | 0.66 |
| Creston | Canada | 340 km (211 mi) | 8.0 C (46.3 F) | 596.7 mm (23.5 in) | 0.77 |
| Thompson Falls Ph | United States | 397 km (247 mi) | 8.6 C (47.4 F) | 586.5 mm (23.1 in) | 0.83 |
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).