Swan Falls Ph Weather Records (USC00108928)
Record envelope, standing records and threshold days for Swan Falls Ph (USC00108928), Idaho, United States, with 92 years of record.
Key Facts for Swan Falls Ph
- Swan Falls Ph (USC00108928) is a weather station in Idaho, United States at 43.24 latitude and -116.38 longitude, 709 m (2,325 ft) above sea level.
- The station reports from 1935 to 2026, 92 years of record.
- 1,464 records set at Swan Falls Ph still stand.
- Records are tracked for tmax, tmin, prcp, snow, snwd: an element needs 30 years of data to be eligible.
- Swan Falls Ph set a daily record low maximum temperature of 15.0 C (59.0 F) on 27 September 2026 (provisional).
Provisional Records
Records set in the last 60 days are provisional until they clear the revision window.
About the Station
- Location: Idaho, United States, 43.24 latitude, -116.38 longitude.
- Elevation: 709 m (2,325 ft).
- Period of record: 1935 to 2026, 92 years.
- Eligible elements: tmax, tmin, prcp, snow, snwd.
Daily Record Envelope and 2026
4 days at or beyond a record| Month | Highest record high | Lowest record low | 2026 highest maximum | 2026 lowest minimum |
|---|---|---|---|---|
| Jan | 19.4 C (66.9 F) | -26.1 C (-15.0 F) | 13.3 C (55.9 F) | -7.8 C (18.0 F) |
| Feb | 23.3 C (73.9 F) | -25.0 C (-13.0 F) | 15.0 C (59.0 F) | -5.0 C (23.0 F) |
| Mar | 29.4 C (84.9 F) | -10.6 C (12.9 F) | 28.9 C (84.0 F) | -2.2 C (28.0 F) |
| Apr | 35.6 C (96.1 F) | -10.6 C (12.9 F) | 28.9 C (84.0 F) | -1.1 C (30.0 F) |
| May | 40.0 C (104.0 F) | -5.0 C (23.0 F) | 35.6 C (96.1 F) | 5.6 C (42.1 F) |
| Jun | 43.3 C (109.9 F) | -1.7 C (28.9 F) | 35.6 C (96.1 F) | 7.2 C (45.0 F) |
| Jul | 45.0 C (113.0 F) | 3.3 C (37.9 F) | 41.1 C (106.0 F) | 14.4 C (57.9 F) |
| Aug | 46.1 C (115.0 F) | 2.8 C (37.0 F) | 40.0 C (104.0 F) | 10.6 C (51.1 F) |
| Sep | 42.2 C (108.0 F) | -2.2 C (28.0 F) | 33.3 C (91.9 F) | 9.4 C (48.9 F) |
| Oct | 37.2 C (99.0 F) | -10.6 C (12.9 F) | 31.7 C (89.1 F) | 11.1 C (52.0 F) |
| Nov | 25.6 C (78.1 F) | -16.1 C (3.0 F) | n/a | n/a |
| Dec | 20.6 C (69.1 F) | -29.4 C (-20.9 F) | n/a | n/a |
Which Years Hold Standing Records
1,464 standing records| Year set | Standing records |
|---|---|
| 1935 | 24 |
| 1936 | 27 |
| 1937 | 22 |
| 1938 | 21 |
| 1939 | 14 |
| 1940 | 18 |
| 1941 | 10 |
| 1942 | 19 |
| 1943 | 20 |
| 1944 | 17 |
| 1945 | 14 |
| 1946 | 6 |
| 1947 | 10 |
| 1948 | 19 |
| 1949 | 29 |
| 1950 | 30 |
| 1951 | 13 |
| 1952 | 7 |
| 1953 | 18 |
| 1954 | 22 |
| 1955 | 27 |
| 1956 | 14 |
| 1957 | 12 |
| 1958 | 17 |
| 1959 | 15 |
| 1960 | 23 |
| 1961 | 22 |
| 1962 | 14 |
| 1963 | 13 |
| 1964 | 9 |
| 1965 | 22 |
| 1966 | 24 |
| 1967 | 15 |
| 1968 | 20 |
| 1969 | 15 |
| 1970 | 11 |
| 1971 | 16 |
| 1972 | 32 |
| 1973 | 9 |
| 1974 | 14 |
| 1975 | 15 |
| 1976 | 7 |
| 1977 | 18 |
| 1978 | 16 |
| 1979 | 13 |
| 1980 | 16 |
| 1981 | 13 |
| 1982 | 10 |
| 1983 | 9 |
| 1984 | 23 |
| 1985 | 34 |
| 1986 | 19 |
| 1987 | 17 |
| 1988 | 26 |
| 1989 | 19 |
| 1990 | 41 |
| 1991 | 24 |
| 1992 | 35 |
| 1993 | 34 |
| 1994 | 22 |
| 1995 | 31 |
| 1996 | 20 |
| 1997 | 7 |
| 1998 | 12 |
| 1999 | 10 |
| 2000 | 9 |
| 2001 | 11 |
| 2002 | 12 |
| 2003 | 13 |
| 2004 | 4 |
| 2005 | 5 |
| 2006 | 8 |
| 2007 | 8 |
| 2008 | 8 |
| 2009 | 6 |
| 2010 | 4 |
| 2011 | 4 |
| 2012 | 11 |
| 2013 | 8 |
| 2014 | 16 |
| 2015 | 21 |
| 2016 | 15 |
| 2017 | 13 |
| 2018 | 9 |
| 2019 | 8 |
| 2020 | 7 |
| 2021 | 5 |
| 2022 | 17 |
| 2023 | 12 |
| 2024 | 14 |
| 2025 | 14 |
| 2026 | 7 |
All-Time Record Progression
8 new records| Date | Kind | Detail |
|---|---|---|
| 1967-07-13 | Record high minimum temperature | Record high minimum temperature 27.2 C (81.0 F) |
| 1982-01-02 | Record daily snowfall | Record daily snowfall 17.8 cm (7.0 in) |
| 1983-12-29 | Record snow depth | Record snow depth 20.3 cm (8.0 in) |
| 1984-07-27 | Record high minimum temperature | Record high minimum temperature 27.8 C (82.0 F) |
| 1990-08-06 | Record high maximum temperature | Record high maximum temperature 46.1 C (115.0 F) |
| 1990-12-22 | Record low maximum temperature | Record low maximum temperature -19.4 C (-2.9 F) |
| 1990-12-22 | Record low minimum temperature | Record low minimum temperature -29.4 C (-20.9 F) |
| 1991-07-05 | Record high minimum temperature | Record high minimum temperature 30.6 C (87.1 F) |
Wettest Day of Each Month
Jun: 40.4 mm (1.6 in)| Month | Record daily precipitation (mm) | Date |
|---|---|---|
| Jan | 17.8 mm (0.7 in) | 19 January 2012 |
| Feb | 24.1 mm (0.9 in) | 12 February 1936 |
| Mar | 25.7 mm (1.0 in) | 30 March 2017 |
| Apr | 34.3 mm (1.4 in) | 20 April 1981 |
| May | 34.3 mm (1.4 in) | 12 May 1958 |
| Jun | 40.4 mm (1.6 in) | 10 June 1954 |
| Jul | 26.4 mm (1.0 in) | 13 July 1975 |
| Aug | 27.2 mm (1.1 in) | 17 August 1968 |
| Sep | 37.8 mm (1.5 in) | 9 September 1986 |
| Oct | 30.5 mm (1.2 in) | 19 October 2015 |
| Nov | 24.1 mm (0.9 in) | 4 November 1938 |
| Dec | 35.6 mm (1.4 in) | 3 December 1994 |
Period of Record Coverage
1935 to 2026| Year | Days with data | Share of year | Complete |
|---|---|---|---|
| 1935 | 180 | 49% | No |
| 1936 | 338 | 92% | Yes |
| 1937 | 361 | 99% | Yes |
| 1938 | 345 | 95% | Yes |
| 1939 | 365 | 100% | Yes |
| 1940 | 366 | 100% | Yes |
| 1941 | 361 | 99% | Yes |
| 1942 | 363 | 99% | Yes |
| 1943 | 363 | 99% | Yes |
| 1944 | 365 | 100% | Yes |
| 1945 | 361 | 99% | Yes |
| 1946 | 364 | 100% | Yes |
| 1947 | 365 | 100% | Yes |
| 1948 | 359 | 98% | Yes |
| 1949 | 360 | 99% | Yes |
| 1950 | 363 | 99% | Yes |
| 1951 | 365 | 100% | Yes |
| 1952 | 366 | 100% | Yes |
| 1953 | 360 | 99% | Yes |
| 1954 | 360 | 99% | Yes |
| 1955 | 352 | 96% | Yes |
| 1956 | 354 | 97% | Yes |
| 1957 | 362 | 99% | Yes |
| 1958 | 365 | 100% | Yes |
| 1959 | 365 | 100% | Yes |
| 1960 | 366 | 100% | Yes |
| 1961 | 364 | 100% | Yes |
| 1962 | 365 | 100% | Yes |
| 1963 | 365 | 100% | Yes |
| 1964 | 365 | 100% | Yes |
| 1965 | 365 | 100% | Yes |
| 1966 | 365 | 100% | Yes |
| 1967 | 364 | 100% | Yes |
| 1968 | 366 | 100% | Yes |
| 1969 | 364 | 100% | Yes |
| 1970 | 358 | 98% | Yes |
| 1971 | 365 | 100% | Yes |
| 1972 | 366 | 100% | Yes |
| 1973 | 365 | 100% | Yes |
| 1974 | 354 | 97% | Yes |
| 1975 | 364 | 100% | Yes |
| 1976 | 366 | 100% | Yes |
| 1977 | 365 | 100% | Yes |
| 1978 | 364 | 100% | Yes |
| 1979 | 355 | 97% | Yes |
| 1980 | 366 | 100% | Yes |
| 1981 | 364 | 100% | Yes |
| 1982 | 323 | 88% | No |
| 1983 | 355 | 97% | Yes |
| 1984 | 352 | 96% | Yes |
| 1985 | 351 | 96% | Yes |
| 1986 | 361 | 99% | Yes |
| 1987 | 333 | 91% | Yes |
| 1988 | 363 | 99% | Yes |
| 1989 | 360 | 99% | Yes |
| 1990 | 361 | 99% | Yes |
| 1991 | 362 | 99% | Yes |
| 1992 | 355 | 97% | Yes |
| 1993 | 355 | 97% | Yes |
| 1994 | 361 | 99% | Yes |
| 1995 | 342 | 94% | Yes |
| 1996 | 312 | 85% | No |
| 1997 | 317 | 87% | No |
| 1998 | 284 | 78% | No |
| 1999 | 343 | 94% | Yes |
| 2000 | 305 | 83% | No |
| 2001 | 339 | 93% | Yes |
| 2002 | 328 | 90% | No |
| 2003 | 350 | 96% | Yes |
| 2004 | 344 | 94% | Yes |
| 2005 | 343 | 94% | Yes |
| 2006 | 351 | 96% | Yes |
| 2007 | 312 | 85% | No |
| 2008 | 344 | 94% | Yes |
| 2009 | 346 | 95% | Yes |
| 2010 | 338 | 93% | Yes |
| 2011 | 349 | 96% | Yes |
| 2012 | 350 | 96% | Yes |
| 2013 | 359 | 98% | Yes |
| 2014 | 259 | 71% | No |
| 2015 | 350 | 96% | Yes |
| 2016 | 358 | 98% | Yes |
| 2017 | 363 | 99% | Yes |
| 2018 | 360 | 99% | Yes |
| 2019 | 348 | 95% | Yes |
| 2020 | 365 | 100% | Yes |
| 2021 | 362 | 99% | Yes |
| 2022 | 364 | 100% | Yes |
| 2023 | 365 | 100% | Yes |
| 2024 | 366 | 100% | Yes |
| 2025 | 363 | 99% | Yes |
| 2026 | 258 | 71% | No |
Latest Records
20| Date | Station | Record | Value | Beat old record by | Old record stood | Significance |
|---|---|---|---|---|---|---|
| 27 September 2026 | Swan Falls Ph, US | daily low max (Provisional) | 15.0 C (59.0 F) | 0.6 C (1.1 F) | 55 years | 26 of 100 (Routine) |
| 5 September 2026 | Swan Falls Ph, US | daily low max (Provisional) | 15.0 C (59.0 F) | 0.6 C (1.1 F) | 85 years | 35 of 100 (Notable) |
| 28 August 2026 | Swan Falls Ph, US | daily high min (Provisional) | 21.7 C (71.1 F) | 1.1 C (2.0 F) | 64 years | 31 of 100 (Routine) |
| 26 August 2026 | Swan Falls Ph, US | daily high min (Provisional) | 21.1 C (70.0 F) | 0.5 C (0.9 F) | 68 years | 30 of 100 (Routine) |
| 16 August 2026 | Swan Falls Ph, US | daily rain (Provisional) | 5.1 mm (0.20 in) | 2.3 mm (0.09 in) | 48 years | 20 of 100 (Routine) |
| 4 August 2026 | Swan Falls Ph, US | daily low max | 27.2 C (81.0 F) | 1.7 C (3.1 F) | 49 years | 27 of 100 (Routine) |
| 24 July 2026 | Swan Falls Ph, US | daily rain | 9.1 mm (0.36 in) | 4.8 mm (0.19 in) | 48 years | 20 of 100 (Routine) |
| 17 July 2026 | Swan Falls Ph, US | daily rain | 4.1 mm (0.16 in) | 2.8 mm (0.11 in) | 71 years | 20 of 100 (Routine) |
| 14 July 2026 | Swan Falls Ph, US | daily high min (Tie) | 25.6 C (78.1 F) | tie | 72 years | 7 of 100 (Routine) |
| 29 June 2026 | Swan Falls Ph, US | daily low max (Tie) | 18.3 C (64.9 F) | tie | 84 years | 8 of 100 (Routine) |
| 28 June 2026 | Swan Falls Ph, US | daily low max | 18.9 C (66.0 F) | 1.1 C (2.0 F) | 55 years | 26 of 100 (Routine) |
| 27 June 2026 | Swan Falls Ph, US | daily low max (Tie) | 20.6 C (69.1 F) | tie | 84 years | 8 of 100 (Routine) |
| 24 May 2026 | Swan Falls Ph, US | daily high min (Tie) | 16.7 C (62.1 F) | tie | 68 years | 7 of 100 (Routine) |
| 13 May 2026 | Swan Falls Ph, US | daily high max | 35.6 C (96.1 F) | 0.6 C (1.1 F) | 89 years | 36 of 100 (Notable) |
| 22 April 2026 | Swan Falls Ph, US | daily rain | 9.9 mm (0.39 in) | 2.0 mm (0.08 in) | 68 years | 20 of 100 (Routine) |
| 17 April 2026 | Swan Falls Ph, US | daily low max | 8.9 C (48.0 F) | 2.2 C (4.0 F) | 84 years | 38 of 100 (Notable) |
| 21 March 2026 | Swan Falls Ph, US | daily high max | 28.9 C (84.0 F) | 5.0 C (9.0 F) | 65 years | 38 of 100 (Notable) |
| 20 March 2026 | Swan Falls Ph, US | daily high max | 27.2 C (81.0 F) | 2.2 C (4.0 F) | 37 years | 24 of 100 (Routine) |
| 19 March 2026 | Swan Falls Ph, US | daily high max | 26.7 C (80.1 F) | 0.6 C (1.1 F) | 37 years | 21 of 100 (Routine) |
| 2 January 2026 | Swan Falls Ph, US | daily rain | 8.1 mm (0.32 in) | 1.5 mm (0.06 in) | 83 years | 20 of 100 (Routine) |
Climate Trend
81 complete years, 1937 to 2025| Year | Annual mean temperature | Difference from the station mean |
|---|---|---|
| 1937 | 12.3 C | -0.59 C |
| 1938 | 12.9 C | +0.04 C |
| 1939 | 13.3 C | +0.36 C |
| 1940 | 13.7 C | +0.79 C |
| 1941 | 12.9 C | -0.04 C |
| 1942 | 11.8 C | -1.06 C |
| 1943 | 12.3 C | -0.58 C |
| 1944 | 11.6 C | -1.31 C |
| 1945 | 12.2 C | -0.68 C |
| 1946 | 12.8 C | -0.13 C |
| 1947 | 12.7 C | -0.17 C |
| 1948 | 11.9 C | -1.02 C |
| 1949 | 12.3 C | -0.57 C |
| 1950 | 12.9 C | -0.01 C |
| 1951 | 12.6 C | -0.28 C |
| 1952 | 12.7 C | -0.24 C |
| 1953 | 13.9 C | +0.95 C |
| 1954 | 13.5 C | +0.56 C |
| 1955 | 12.3 C | -0.63 C |
| 1956 | 12.7 C | -0.20 C |
| 1957 | 12.8 C | -0.14 C |
| 1958 | 14.1 C | +1.23 C |
| 1959 | 13.3 C | +0.40 C |
| 1960 | 13.1 C | +0.19 C |
| 1961 | 13.7 C | +0.81 C |
| 1962 | 12.6 C | -0.31 C |
| 1963 | 13.3 C | +0.36 C |
| 1964 | 12.3 C | -0.62 C |
| 1965 | 12.9 C | +0.04 C |
| 1966 | 13.8 C | +0.92 C |
| 1967 | 13.9 C | +0.97 C |
| 1968 | 13.3 C | +0.43 C |
| 1969 | 13.3 C | +0.42 C |
| 1970 | 13.2 C | +0.25 C |
| 1971 | 12.9 C | -0.04 C |
| 1972 | 12.5 C | -0.44 C |
| 1973 | 13.5 C | +0.62 C |
| 1974 | 13.4 C | +0.46 C |
| 1975 | 12.5 C | -0.39 C |
| 1976 | 12.6 C | -0.28 C |
| 1977 | 12.9 C | +0.03 C |
| 1978 | 13.1 C | +0.17 C |
| 1979 | 12.9 C | -0.01 C |
| 1980 | 12.9 C | -0.01 C |
| 1981 | 13.5 C | +0.57 C |
| 1983 | 12.9 C | +0.02 C |
| 1984 | 11.5 C | -1.43 C |
| 1985 | 11.0 C | -1.94 C |
| 1986 | 13.7 C | +0.79 C |
| 1988 | 13.5 C | +0.60 C |
| 1989 | 12.7 C | -0.21 C |
| 1990 | 13.2 C | +0.32 C |
| 1991 | 12.8 C | -0.11 C |
| 1992 | 13.7 C | +0.81 C |
| 1993 | 11.4 C | -1.51 C |
| 1994 | 13.5 C | +0.59 C |
| 1995 | 13.0 C | +0.05 C |
| 1996 | 12.6 C | -0.29 C |
| 1999 | 12.8 C | -0.15 C |
| 2001 | 13.4 C | +0.47 C |
| 2002 | 12.9 C | +0.03 C |
| 2003 | 14.0 C | +1.14 C |
| 2004 | 13.2 C | +0.29 C |
| 2005 | 12.7 C | -0.19 C |
| 2006 | 13.3 C | +0.38 C |
| 2008 | 12.3 C | -0.58 C |
| 2009 | 12.2 C | -0.74 C |
| 2010 | 12.5 C | -0.44 C |
| 2011 | 11.9 C | -1.00 C |
| 2012 | 13.4 C | +0.48 C |
| 2013 | 12.0 C | -0.95 C |
| 2015 | 13.8 C | +0.88 C |
| 2016 | 13.6 C | +0.71 C |
| 2017 | 12.8 C | -0.13 C |
| 2018 | 13.4 C | +0.46 C |
| 2020 | 13.2 C | +0.25 C |
| 2021 | 13.9 C | +0.99 C |
| 2022 | 12.6 C | -0.32 C |
| 2023 | 12.5 C | -0.44 C |
| 2024 | 12.8 C | -0.10 C |
| 2025 | 13.6 C | +0.65 C |
The fitted trend in annual mean temperature here over 1937 to 2025 is 0.03 C (-0.03 to 0.08) per decade. The interval includes zero, so the trend is not clearly different from zero. In Fahrenheit: 0.05 F (-0.05 to 0.14) per decade. The slope is a straight line fitted to 81 complete years; the brackets give its 95 percent interval.
| Measure | Per decade (C) | Per decade (F) | Period | Complete years | Reading |
|---|---|---|---|---|---|
| Annual mean temperature | 0.03 C (-0.03 to 0.08) per decade | 0.05 F (-0.05 to 0.14) per decade | 1937 to 2025 | 81 | Not clearly different from zero |
| Mean daily maximum | -0.04 C (-0.11 to 0.03) per decade | -0.08 F (-0.20 to 0.05) per decade | 1937 to 2025 | 81 | Not clearly different from zero |
| Mean daily minimum | 0.09 C (0.03 to 0.15) per decade | 0.2 F (0.1 to 0.3) per decade | 1937 to 2025 | 81 | 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
1935 to 2026| Measure | Record | Year of the record | Median year | Years with a value |
|---|---|---|---|---|
| Hottest day (TXx) | 46.1 C (115.0 F) | 1990 | 41.7 C (107.1 F) | 92 |
| Coldest night (TNn) | -29.4 C (-20.9 F) | 1990 | -14.4 C (6.1 F) | 92 |
| Wettest day (Rx1day) | 40.4 mm (1.6 in) | 1954 | 18.3 mm (0.7 in) | 92 |
| Wettest five days (Rx5day) | 69.4 mm (2.7 in) | 1981 | 28.1 mm (1.1 in) | 92 |
| Longest dry spell (CDD) | 117 days | 1942 | 55 days | 92 |
Hottest day (TXx)
| Year | Hottest day (TXx) |
|---|---|
| 1935 | 43.9 C (111.0 F) |
| 1936 | 43.3 C (109.9 F) |
| 1937 | 41.1 C (106.0 F) |
| 1938 | 40.6 C (105.1 F) |
| 1939 | 42.8 C (109.0 F) |
| 1940 | 43.3 C (109.9 F) |
| 1941 | 41.7 C (107.1 F) |
| 1942 | 41.7 C (107.1 F) |
| 1943 | 41.7 C (107.1 F) |
| 1944 | 41.1 C (106.0 F) |
| 1945 | 40.0 C (104.0 F) |
| 1946 | 42.8 C (109.0 F) |
| 1947 | 42.8 C (109.0 F) |
| 1948 | 40.6 C (105.1 F) |
| 1949 | 42.8 C (109.0 F) |
| 1950 | 42.2 C (108.0 F) |
| 1951 | 42.2 C (108.0 F) |
| 1952 | 39.4 C (102.9 F) |
| 1953 | 42.2 C (108.0 F) |
| 1954 | 41.1 C (106.0 F) |
| 1955 | 43.3 C (109.9 F) |
| 1956 | 43.3 C (109.9 F) |
| 1957 | 42.8 C (109.0 F) |
| 1958 | 41.1 C (106.0 F) |
| 1959 | 42.2 C (108.0 F) |
| 1960 | 44.4 C (111.9 F) |
| 1961 | 43.9 C (111.0 F) |
| 1962 | 41.1 C (106.0 F) |
| 1963 | 41.1 C (106.0 F) |
| 1964 | 40.6 C (105.1 F) |
| 1965 | 40.0 C (104.0 F) |
| 1966 | 42.8 C (109.0 F) |
| 1967 | 44.4 C (111.9 F) |
| 1968 | 42.8 C (109.0 F) |
| 1969 | 42.2 C (108.0 F) |
| 1970 | 40.6 C (105.1 F) |
| 1971 | 41.7 C (107.1 F) |
| 1972 | 41.7 C (107.1 F) |
| 1973 | 42.2 C (108.0 F) |
| 1974 | 42.2 C (108.0 F) |
| 1975 | 41.1 C (106.0 F) |
| 1976 | 39.4 C (102.9 F) |
| 1977 | 41.7 C (107.1 F) |
| 1978 | 41.7 C (107.1 F) |
| 1979 | 41.1 C (106.0 F) |
| 1980 | 41.1 C (106.0 F) |
| 1981 | 42.2 C (108.0 F) |
| 1982 | 38.9 C (102.0 F) |
| 1983 | 43.9 C (111.0 F) |
| 1984 | 43.9 C (111.0 F) |
| 1985 | 42.2 C (108.0 F) |
| 1986 | 41.1 C (106.0 F) |
| 1987 | 41.1 C (106.0 F) |
| 1988 | 43.9 C (111.0 F) |
| 1989 | 43.3 C (109.9 F) |
| 1990 | 46.1 C (115.0 F) |
| 1991 | 41.7 C (107.1 F) |
| 1992 | 43.9 C (111.0 F) |
| 1993 | 38.9 C (102.0 F) |
| 1994 | 42.2 C (108.0 F) |
| 1995 | 41.7 C (107.1 F) |
| 1996 | 42.8 C (109.0 F) |
| 1997 | 40.0 C (104.0 F) |
| 1998 | 43.3 C (109.9 F) |
| 1999 | 39.4 C (102.9 F) |
| 2000 | 41.7 C (107.1 F) |
| 2001 | 41.7 C (107.1 F) |
| 2002 | 45.0 C (113.0 F) |
| 2003 | 42.8 C (109.0 F) |
| 2004 | 40.6 C (105.1 F) |
| 2005 | 41.7 C (107.1 F) |
| 2006 | 43.9 C (111.0 F) |
| 2007 | 42.8 C (109.0 F) |
| 2008 | 42.2 C (108.0 F) |
| 2009 | 40.6 C (105.1 F) |
| 2010 | 39.4 C (102.9 F) |
| 2011 | 40.0 C (104.0 F) |
| 2012 | 41.7 C (107.1 F) |
| 2013 | 43.9 C (111.0 F) |
| 2014 | 41.1 C (106.0 F) |
| 2015 | 42.8 C (109.0 F) |
| 2016 | 41.1 C (106.0 F) |
| 2017 | 42.2 C (108.0 F) |
| 2018 | 44.4 C (111.9 F) |
| 2019 | 39.4 C (102.9 F) |
| 2020 | 41.7 C (107.1 F) |
| 2021 | 42.8 C (109.0 F) |
| 2022 | 42.2 C (108.0 F) |
| 2023 | 40.6 C (105.1 F) |
| 2024 | 42.2 C (108.0 F) |
| 2025 | 40.6 C (105.1 F) |
| 2026 | 41.1 C (106.0 F) |
Coldest night (TNn)
| Year | Coldest night (TNn) |
|---|---|
| 1935 | -13.3 C (8.1 F) |
| 1936 | -12.2 C (10.0 F) |
| 1937 | -25.6 C (-14.1 F) |
| 1938 | -11.7 C (10.9 F) |
| 1939 | -9.4 C (15.1 F) |
| 1940 | -13.3 C (8.1 F) |
| 1941 | -11.7 C (10.9 F) |
| 1942 | -19.4 C (-2.9 F) |
| 1943 | -18.3 C (-0.9 F) |
| 1944 | -16.1 C (3.0 F) |
| 1945 | -13.3 C (8.1 F) |
| 1946 | -12.2 C (10.0 F) |
| 1947 | -15.6 C (3.9 F) |
| 1948 | -16.1 C (3.0 F) |
| 1949 | -21.1 C (-6.0 F) |
| 1950 | -19.4 C (-2.9 F) |
| 1951 | -15.0 C (5.0 F) |
| 1952 | -17.8 C (0.0 F) |
| 1953 | -7.2 C (19.0 F) |
| 1954 | -11.1 C (12.0 F) |
| 1955 | -16.1 C (3.0 F) |
| 1956 | -18.9 C (-2.0 F) |
| 1957 | -19.4 C (-2.9 F) |
| 1958 | -9.4 C (15.1 F) |
| 1959 | -16.7 C (1.9 F) |
| 1960 | -17.8 C (0.0 F) |
| 1961 | -13.9 C (7.0 F) |
| 1962 | -26.1 C (-15.0 F) |
| 1963 | -21.7 C (-7.1 F) |
| 1964 | -17.8 C (0.0 F) |
| 1965 | -10.6 C (12.9 F) |
| 1966 | -12.2 C (10.0 F) |
| 1967 | -15.0 C (5.0 F) |
| 1968 | -11.7 C (10.9 F) |
| 1969 | -10.0 C (14.0 F) |
| 1970 | -12.2 C (10.0 F) |
| 1971 | -14.4 C (6.1 F) |
| 1972 | -26.1 C (-15.0 F) |
| 1973 | -11.1 C (12.0 F) |
| 1974 | -18.9 C (-2.0 F) |
| 1975 | -14.4 C (6.1 F) |
| 1976 | -12.2 C (10.0 F) |
| 1977 | -18.3 C (-0.9 F) |
| 1978 | -18.3 C (-0.9 F) |
| 1979 | -21.7 C (-7.1 F) |
| 1980 | -17.8 C (0.0 F) |
| 1981 | -12.2 C (10.0 F) |
| 1982 | -18.3 C (-0.9 F) |
| 1983 | -20.6 C (-5.1 F) |
| 1984 | -21.7 C (-7.1 F) |
| 1985 | -20.6 C (-5.1 F) |
| 1986 | -11.7 C (10.9 F) |
| 1987 | -14.4 C (6.1 F) |
| 1988 | -16.1 C (3.0 F) |
| 1989 | -25.0 C (-13.0 F) |
| 1990 | -29.4 C (-20.9 F) |
| 1991 | -21.7 C (-7.1 F) |
| 1992 | -16.7 C (1.9 F) |
| 1993 | -15.6 C (3.9 F) |
| 1994 | -12.8 C (9.0 F) |
| 1995 | -13.9 C (7.0 F) |
| 1996 | -16.7 C (1.9 F) |
| 1997 | -12.8 C (9.0 F) |
| 1998 | -17.2 C (1.0 F) |
| 1999 | -6.7 C (19.9 F) |
| 2000 | -9.4 C (15.1 F) |
| 2001 | -11.1 C (12.0 F) |
| 2002 | -10.0 C (14.0 F) |
| 2003 | -8.3 C (17.1 F) |
| 2004 | -13.3 C (8.1 F) |
| 2005 | -12.2 C (10.0 F) |
| 2006 | -11.7 C (10.9 F) |
| 2007 | -12.2 C (10.0 F) |
| 2008 | -15.0 C (5.0 F) |
| 2009 | -17.8 C (0.0 F) |
| 2010 | -12.2 C (10.0 F) |
| 2011 | -11.7 C (10.9 F) |
| 2012 | -11.7 C (10.9 F) |
| 2013 | -17.8 C (0.0 F) |
| 2014 | -15.0 C (5.0 F) |
| 2015 | -13.3 C (8.1 F) |
| 2016 | -15.6 C (3.9 F) |
| 2017 | -23.3 C (-9.9 F) |
| 2018 | -11.7 C (10.9 F) |
| 2019 | -10.6 C (12.9 F) |
| 2020 | -8.3 C (17.1 F) |
| 2021 | -8.3 C (17.1 F) |
| 2022 | -13.9 C (7.0 F) |
| 2023 | -12.2 C (10.0 F) |
| 2024 | -17.2 C (1.0 F) |
| 2025 | -12.2 C (10.0 F) |
| 2026 | -7.8 C (18.0 F) |
Wettest day (Rx1day)
| Year | Wettest day (Rx1day) |
|---|---|
| 1935 | 10.2 mm (0.4 in) |
| 1936 | 24.1 mm (0.9 in) |
| 1937 | 19.1 mm (0.8 in) |
| 1938 | 31.8 mm (1.3 in) |
| 1939 | 21.8 mm (0.9 in) |
| 1940 | 17.5 mm (0.7 in) |
| 1941 | 19.8 mm (0.8 in) |
| 1942 | 9.7 mm (0.38 in) |
| 1943 | 16.8 mm (0.7 in) |
| 1944 | 14.0 mm (0.6 in) |
| 1945 | 18.8 mm (0.7 in) |
| 1946 | 16.8 mm (0.7 in) |
| 1947 | 11.2 mm (0.4 in) |
| 1948 | 17.3 mm (0.7 in) |
| 1949 | 8.6 mm (0.34 in) |
| 1950 | 18.0 mm (0.7 in) |
| 1951 | 13.5 mm (0.5 in) |
| 1952 | 13.5 mm (0.5 in) |
| 1953 | 20.1 mm (0.8 in) |
| 1954 | 40.4 mm (1.6 in) |
| 1955 | 23.6 mm (0.9 in) |
| 1956 | 18.8 mm (0.7 in) |
| 1957 | 13.5 mm (0.5 in) |
| 1958 | 34.3 mm (1.4 in) |
| 1959 | 18.8 mm (0.7 in) |
| 1960 | 13.0 mm (0.5 in) |
| 1961 | 21.3 mm (0.8 in) |
| 1962 | 26.2 mm (1.0 in) |
| 1963 | 17.3 mm (0.7 in) |
| 1964 | 19.1 mm (0.8 in) |
| 1965 | 24.4 mm (1.0 in) |
| 1966 | 8.6 mm (0.34 in) |
| 1967 | 20.3 mm (0.8 in) |
| 1968 | 27.2 mm (1.1 in) |
| 1969 | 21.6 mm (0.9 in) |
| 1970 | 25.1 mm (1.0 in) |
| 1971 | 24.6 mm (1.0 in) |
| 1972 | 16.3 mm (0.6 in) |
| 1973 | 21.6 mm (0.9 in) |
| 1974 | 11.2 mm (0.4 in) |
| 1975 | 26.4 mm (1.0 in) |
| 1976 | 20.3 mm (0.8 in) |
| 1977 | 9.1 mm (0.36 in) |
| 1978 | 24.1 mm (0.9 in) |
| 1979 | 17.0 mm (0.7 in) |
| 1980 | 23.4 mm (0.9 in) |
| 1981 | 34.3 mm (1.4 in) |
| 1982 | 13.5 mm (0.5 in) |
| 1983 | 21.6 mm (0.9 in) |
| 1984 | 17.3 mm (0.7 in) |
| 1985 | 17.8 mm (0.7 in) |
| 1986 | 37.8 mm (1.5 in) |
| 1987 | 29.0 mm (1.1 in) |
| 1988 | 15.0 mm (0.6 in) |
| 1989 | 11.7 mm (0.5 in) |
| 1990 | 13.2 mm (0.5 in) |
| 1991 | 21.3 mm (0.8 in) |
| 1992 | 8.9 mm (0.35 in) |
| 1993 | 17.8 mm (0.7 in) |
| 1994 | 35.6 mm (1.4 in) |
| 1995 | 14.7 mm (0.6 in) |
| 1996 | 15.0 mm (0.6 in) |
| 1997 | 16.8 mm (0.7 in) |
| 1998 | 22.1 mm (0.9 in) |
| 1999 | 6.6 mm (0.26 in) |
| 2000 | 15.2 mm (0.6 in) |
| 2001 | 10.7 mm (0.4 in) |
| 2002 | 12.7 mm (0.5 in) |
| 2003 | 18.3 mm (0.7 in) |
| 2004 | 12.7 mm (0.5 in) |
| 2005 | 19.8 mm (0.8 in) |
| 2006 | 22.4 mm (0.9 in) |
| 2007 | 22.1 mm (0.9 in) |
| 2008 | 11.2 mm (0.4 in) |
| 2009 | 18.3 mm (0.7 in) |
| 2010 | 15.7 mm (0.6 in) |
| 2011 | 14.0 mm (0.6 in) |
| 2012 | 17.8 mm (0.7 in) |
| 2013 | 9.4 mm (0.37 in) |
| 2014 | 21.8 mm (0.9 in) |
| 2015 | 30.5 mm (1.2 in) |
| 2016 | 10.7 mm (0.4 in) |
| 2017 | 25.7 mm (1.0 in) |
| 2018 | 21.8 mm (0.9 in) |
| 2019 | 22.9 mm (0.9 in) |
| 2020 | 29.2 mm (1.1 in) |
| 2021 | 17.3 mm (0.7 in) |
| 2022 | 15.0 mm (0.6 in) |
| 2023 | 23.9 mm (0.9 in) |
| 2024 | 32.8 mm (1.3 in) |
| 2025 | 23.9 mm (0.9 in) |
| 2026 | 13.0 mm (0.5 in) |
Wettest five days (Rx5day)
| Year | Wettest five days (Rx5day) |
|---|---|
| 1935 | 12.3 mm (0.5 in) |
| 1936 | 45.3 mm (1.8 in) |
| 1937 | 24.4 mm (1.0 in) |
| 1938 | 36.7 mm (1.4 in) |
| 1939 | 30.2 mm (1.2 in) |
| 1940 | 27.6 mm (1.1 in) |
| 1941 | 37.6 mm (1.5 in) |
| 1942 | 20.9 mm (0.8 in) |
| 1943 | 33.6 mm (1.3 in) |
| 1944 | 41.4 mm (1.6 in) |
| 1945 | 38.6 mm (1.5 in) |
| 1946 | 16.8 mm (0.7 in) |
| 1947 | 20.6 mm (0.8 in) |
| 1948 | 26.2 mm (1.0 in) |
| 1949 | 12.6 mm (0.5 in) |
| 1950 | 26.0 mm (1.0 in) |
| 1951 | 14.7 mm (0.6 in) |
| 1952 | 14.0 mm (0.6 in) |
| 1953 | 38.1 mm (1.5 in) |
| 1954 | 59.1 mm (2.3 in) |
| 1955 | 24.3 mm (1.0 in) |
| 1956 | 21.7 mm (0.9 in) |
| 1957 | 22.7 mm (0.9 in) |
| 1958 | 34.6 mm (1.4 in) |
| 1959 | 33.0 mm (1.3 in) |
| 1960 | 15.2 mm (0.6 in) |
| 1961 | 26.1 mm (1.0 in) |
| 1962 | 37.9 mm (1.5 in) |
| 1963 | 28.0 mm (1.1 in) |
| 1964 | 21.9 mm (0.9 in) |
| 1965 | 30.2 mm (1.2 in) |
| 1966 | 13.0 mm (0.5 in) |
| 1967 | 42.6 mm (1.7 in) |
| 1968 | 51.9 mm (2.0 in) |
| 1969 | 22.6 mm (0.9 in) |
| 1970 | 36.1 mm (1.4 in) |
| 1971 | 29.2 mm (1.1 in) |
| 1972 | 31.5 mm (1.2 in) |
| 1973 | 41.0 mm (1.6 in) |
| 1974 | 16.5 mm (0.6 in) |
| 1975 | 27.2 mm (1.1 in) |
| 1976 | 27.6 mm (1.1 in) |
| 1977 | 24.9 mm (1.0 in) |
| 1978 | 35.8 mm (1.4 in) |
| 1979 | 28.0 mm (1.1 in) |
| 1980 | 46.5 mm (1.8 in) |
| 1981 | 69.4 mm (2.7 in) |
| 1982 | 24.4 mm (1.0 in) |
| 1983 | 31.0 mm (1.2 in) |
| 1984 | 27.2 mm (1.1 in) |
| 1985 | 33.5 mm (1.3 in) |
| 1986 | 41.4 mm (1.6 in) |
| 1987 | 35.4 mm (1.4 in) |
| 1988 | 28.0 mm (1.1 in) |
| 1989 | 17.8 mm (0.7 in) |
| 1990 | 35.3 mm (1.4 in) |
| 1991 | 28.9 mm (1.1 in) |
| 1992 | 17.3 mm (0.7 in) |
| 1993 | 34.4 mm (1.4 in) |
| 1994 | 45.2 mm (1.8 in) |
| 1995 | 28.8 mm (1.1 in) |
| 1996 | 29.3 mm (1.2 in) |
| 1997 | 28.2 mm (1.1 in) |
| 1998 | 46.2 mm (1.8 in) |
| 1999 | 11.3 mm (0.4 in) |
| 2000 | 32.2 mm (1.3 in) |
| 2001 | 13.7 mm (0.5 in) |
| 2002 | 9.9 mm (0.39 in) |
| 2003 | 25.4 mm (1.0 in) |
| 2004 | 16.2 mm (0.6 in) |
| 2005 | 33.5 mm (1.3 in) |
| 2006 | 31.0 mm (1.2 in) |
| 2007 | 23.9 mm (0.9 in) |
| 2008 | 13.8 mm (0.5 in) |
| 2009 | 28.0 mm (1.1 in) |
| 2010 | 23.3 mm (0.9 in) |
| 2011 | 21.8 mm (0.9 in) |
| 2012 | 27.5 mm (1.1 in) |
| 2013 | 16.3 mm (0.6 in) |
| 2014 | 47.5 mm (1.9 in) |
| 2015 | 38.2 mm (1.5 in) |
| 2016 | 11.5 mm (0.5 in) |
| 2017 | 33.8 mm (1.3 in) |
| 2018 | 23.9 mm (0.9 in) |
| 2019 | 28.5 mm (1.1 in) |
| 2020 | 37.0 mm (1.5 in) |
| 2021 | 22.7 mm (0.9 in) |
| 2022 | 22.7 mm (0.9 in) |
| 2023 | 33.8 mm (1.3 in) |
| 2024 | 46.0 mm (1.8 in) |
| 2025 | 44.7 mm (1.8 in) |
| 2026 | 29.5 mm (1.2 in) |
Longest dry spell (CDD)
| Year | Longest dry spell (CDD) |
|---|---|
| 1935 | 97 days |
| 1936 | 85 days |
| 1937 | 100 days |
| 1938 | 74 days |
| 1939 | 62 days |
| 1940 | 48 days |
| 1941 | 25 days |
| 1942 | 117 days |
| 1943 | 95 days |
| 1944 | 87 days |
| 1945 | 53 days |
| 1946 | 60 days |
| 1947 | 90 days |
| 1948 | 27 days |
| 1949 | 51 days |
| 1950 | 33 days |
| 1951 | 46 days |
| 1952 | 69 days |
| 1953 | 72 days |
| 1954 | 47 days |
| 1955 | 38 days |
| 1956 | 111 days |
| 1957 | 95 days |
| 1958 | 54 days |
| 1959 | 55 days |
| 1960 | 64 days |
| 1961 | 33 days |
| 1962 | 57 days |
| 1963 | 48 days |
| 1964 | 71 days |
| 1965 | 51 days |
| 1966 | 54 days |
| 1967 | 72 days |
| 1968 | 61 days |
| 1969 | 56 days |
| 1970 | 34 days |
| 1971 | 48 days |
| 1972 | 65 days |
| 1973 | 50 days |
| 1974 | 63 days |
| 1975 | 44 days |
| 1976 | 37 days |
| 1977 | 46 days |
| 1978 | 59 days |
| 1979 | 52 days |
| 1980 | 46 days |
| 1981 | 44 days |
| 1982 | 28 days |
| 1983 | 28 days |
| 1984 | 70 days |
| 1985 | 50 days |
| 1986 | 74 days |
| 1987 | 79 days |
| 1988 | 43 days |
| 1989 | 80 days |
| 1990 | 51 days |
| 1991 | 71 days |
| 1992 | 93 days |
| 1993 | 52 days |
| 1994 | 85 days |
| 1995 | 60 days |
| 1996 | 80 days |
| 1997 | 46 days |
| 1998 | 40 days |
| 1999 | 95 days |
| 2000 | 108 days |
| 2001 | 71 days |
| 2002 | 50 days |
| 2003 | 86 days |
| 2004 | 51 days |
| 2005 | 23 days |
| 2006 | 76 days |
| 2007 | 99 days |
| 2008 | 58 days |
| 2009 | 35 days |
| 2010 | 53 days |
| 2011 | 43 days |
| 2012 | 58 days |
| 2013 | 50 days |
| 2014 | 27 days |
| 2015 | 19 days |
| 2016 | 29 days |
| 2017 | 54 days |
| 2018 | 63 days |
| 2019 | 57 days |
| 2020 | 78 days |
| 2021 | 40 days |
| 2022 | 58 days |
| 2023 | 43 days |
| 2024 | 112 days |
| 2025 | 47 days |
| 2026 | 39 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
81 years with a frostAcross 81 years with a frost, the median last spring frost at Swan Falls Ph falls on 18 April and the median first autumn frost on 25 October, which leaves a median of 191 days between them.
In 1990 to 2025 the median growing season was 195 days. That is 4 days more than in 1937 to 1966.
Fitted over all years, the growing season changes by +1.1 days per decade at this station.
| Measure | Median, all years | Earliest period (1937 to 1966) | Recent period (1990 to 2025) | Recent against earliest | Fitted trend |
|---|---|---|---|---|---|
| Last spring frost | 18 April | 18 April | 13 April | 5 days earlier | -0.9 days per decade |
| First autumn frost | 25 October | 25 October | 27 October | 2 days later | +0.2 days per decade |
| Growing days | 191 days | 191 days | 195 days | 4 days more | +1.1 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
88 years, 1936 to 2025A day with at least 18.4 mm (0.7 in) of rain is expected about once in 2 years. A day with at least 40.3 mm (1.6 in) of rain is expected about once in 100 years.
| Expected about once in | A day with at least | Note |
|---|---|---|
| 2 years | 18.4 mm (0.7 in) | |
| 5 years | 24.8 mm (1.0 in) | |
| 10 years | 28.8 mm (1.1 in) | |
| 25 years | 33.7 mm (1.3 in) | |
| 50 years | 37.1 mm (1.5 in) | |
| 100 years | 40.3 mm (1.6 in) | Longer than the 88 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, 88 years of values from 1936 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: 40.4 mm (1.6 in) in 1954; 37.8 mm (1.5 in) in 1986; 35.6 mm (1.4 in) in 1994.
Station Changes
1 suspectedOne change was suspected in the annual mean temperature of Swan Falls Ph, at 1949. Each is measured against neighbouring stations.
- Relative to 5 neighbouring stations, the station's annual mean temperature from 1949 ran 0.5 C (1.0 F) higher than in the years before (likely change).
| Year | Shift (C) | Shift (F) | Strength | Neighbours |
|---|---|---|---|---|
| 1949 | +0.5 | +1.0 | 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
2009 to 2025 against 1961 to 1990Over 2009 to 2025, Swan Falls Ph had a mean temperature of 12.9 C (55.3 F) and 192.9 mm (7.6 in) of rain a year. The 3 stations whose 1961 to 1990 climate was closest to that are Priest Rapids Dam (United States, 469 km away), Silverpeak (United States, 618 km away) and Winslow AP (United States, 1,035 km away).
| Twin station | Country | Distance away | Mean temperature, 1961-1990 | Rain a year, 1961-1990 | Climate difference |
|---|---|---|---|---|---|
| Priest Rapids Dam | United States | 469 km (291 mi) | 12.9 C (55.2 F) | 172.0 mm (6.8 in) | 0.72 |
| Silverpeak | United States | 618 km (384 mi) | 12.9 C (55.1 F) | 127.5 mm (5.0 in) | 0.73 |
| Winslow AP | United States | 1,035 km (643 mi) | 12.8 C (55.0 F) | 204.7 mm (8.1 in) | 0.74 |
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).