Powell Weather Records (USC00107320)
Record envelope, standing records and threshold days for Powell (USC00107320), Idaho, United States, with 65 years of record.
Key Facts for Powell
- Powell (USC00107320) is a weather station in Idaho, United States at 46.51 latitude and -114.71 longitude, 1,052 m (3,451 ft) above sea level.
- The station reports from 1962 to 2026, 65 years of record.
- 1,464 records set at Powell still stand.
- Records are tracked for tmax, tmin, prcp, snow, snwd: an element needs 30 years of data to be eligible.
- Powell set a daily record low maximum temperature of 11.1 C (52.0 F) on 8 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, 46.51 latitude, -114.71 longitude.
- Elevation: 1,052 m (3,451 ft).
- Period of record: 1962 to 2026, 65 years.
- Eligible elements: tmax, tmin, prcp, snow, snwd.
Daily Record Envelope and 2026
2 days at or beyond a record| Month | Highest record high | Lowest record low | 2026 highest maximum | 2026 lowest minimum |
|---|---|---|---|---|
| Jan | 10.0 C (50.0 F) | -33.3 C (-27.9 F) | 3.9 C (39.0 F) | -15.0 C (5.0 F) |
| Feb | 17.8 C (64.0 F) | -31.7 C (-25.1 F) | 10.0 C (50.0 F) | -8.9 C (16.0 F) |
| Mar | 23.3 C (73.9 F) | -24.4 C (-11.9 F) | 16.7 C (62.1 F) | -6.7 C (19.9 F) |
| Apr | 30.6 C (87.1 F) | -13.3 C (8.1 F) | 27.2 C (81.0 F) | -3.3 C (26.1 F) |
| May | 35.6 C (96.1 F) | -6.7 C (19.9 F) | 32.8 C (91.0 F) | -1.7 C (28.9 F) |
| Jun | 37.2 C (99.0 F) | -6.7 C (19.9 F) | 30.0 C (86.0 F) | -0.6 C (30.9 F) |
| Jul | 38.9 C (102.0 F) | -2.2 C (28.0 F) | 34.4 C (93.9 F) | 6.1 C (43.0 F) |
| Aug | 40.6 C (105.1 F) | -6.1 C (21.0 F) | 36.1 C (97.0 F) | 3.9 C (39.0 F) |
| Sep | 38.9 C (102.0 F) | -7.8 C (18.0 F) | 28.3 C (82.9 F) | -1.7 C (28.9 F) |
| Oct | 32.2 C (90.0 F) | -16.7 C (1.9 F) | 26.1 C (79.0 F) | -1.7 C (28.9 F) |
| Nov | 19.4 C (66.9 F) | -24.4 C (-11.9 F) | n/a | n/a |
| Dec | 9.4 C (48.9 F) | -35.0 C (-31.0 F) | n/a | n/a |
Which Years Hold Standing Records
1,464 standing records| Year set | Standing records |
|---|---|
| 1962 | 12 |
| 1963 | 27 |
| 1964 | 33 |
| 1965 | 36 |
| 1966 | 26 |
| 1967 | 32 |
| 1968 | 29 |
| 1969 | 36 |
| 1970 | 28 |
| 1971 | 29 |
| 1972 | 40 |
| 1973 | 27 |
| 1974 | 34 |
| 1975 | 31 |
| 1976 | 18 |
| 1977 | 31 |
| 1978 | 34 |
| 1979 | 24 |
| 1980 | 30 |
| 1981 | 38 |
| 1982 | 30 |
| 1983 | 28 |
| 1984 | 42 |
| 1985 | 40 |
| 1986 | 50 |
| 1987 | 48 |
| 1988 | 52 |
| 1989 | 23 |
| 1990 | 34 |
| 1991 | 20 |
| 1992 | 30 |
| 1993 | 35 |
| 1994 | 35 |
| 1995 | 22 |
| 1996 | 27 |
| 1997 | 14 |
| 1998 | 19 |
| 1999 | 16 |
| 2000 | 12 |
| 2001 | 18 |
| 2002 | 27 |
| 2003 | 17 |
| 2004 | 26 |
| 2005 | 11 |
| 2006 | 21 |
| 2007 | 17 |
| 2008 | 29 |
| 2009 | 27 |
| 2010 | 16 |
| 2011 | 18 |
| 2012 | 12 |
| 2013 | 2 |
| 2024 | 6 |
| 2025 | 31 |
| 2026 | 14 |
All-Time Record Progression
3 new records| Date | Kind | Detail |
|---|---|---|
| 2001-07-05 | Record high minimum temperature | Record high minimum temperature 17.2 C (63.0 F) |
| 2003-03-07 | Record daily snowfall | Record daily snowfall 46.5 cm (18.3 in) |
| 2009-01-02 | Record daily snowfall | Record daily snowfall 61.0 cm (24.0 in) |
Wettest Day of Each Month
Dec: 69.3 mm (2.7 in)| Month | Record daily precipitation (mm) | Date |
|---|---|---|
| Jan | 45.7 mm (1.8 in) | 10 January 1989 |
| Feb | 66.8 mm (2.6 in) | 7 February 1996 |
| Mar | 40.1 mm (1.6 in) | 1 March 1999 |
| Apr | 54.1 mm (2.1 in) | 20 April 1965 |
| May | 43.9 mm (1.7 in) | 26 May 1980 |
| Jun | 50.8 mm (2.0 in) | 14 June 1994 |
| Jul | 31.8 mm (1.3 in) | 3 July 1995 |
| Aug | 33.5 mm (1.3 in) | 24 August 1975 |
| Sep | 45.7 mm (1.8 in) | 11 September 1962 |
| Oct | 44.5 mm (1.8 in) | 31 October 1997 |
| Nov | 58.4 mm (2.3 in) | 30 November 1995 |
| Dec | 69.3 mm (2.7 in) | 23 December 1964 |
Period of Record Coverage
1962 to 2026| Year | Days with data | Share of year | Complete |
|---|---|---|---|
| 1962 | 131 | 36% | No |
| 1963 | 352 | 96% | Yes |
| 1964 | 366 | 100% | Yes |
| 1965 | 365 | 100% | Yes |
| 1966 | 364 | 100% | Yes |
| 1967 | 346 | 95% | Yes |
| 1968 | 366 | 100% | Yes |
| 1969 | 365 | 100% | Yes |
| 1970 | 334 | 92% | Yes |
| 1971 | 364 | 100% | Yes |
| 1972 | 365 | 100% | Yes |
| 1973 | 362 | 99% | Yes |
| 1974 | 364 | 100% | Yes |
| 1975 | 365 | 100% | Yes |
| 1976 | 366 | 100% | Yes |
| 1977 | 364 | 100% | Yes |
| 1978 | 365 | 100% | Yes |
| 1979 | 365 | 100% | Yes |
| 1980 | 366 | 100% | Yes |
| 1981 | 364 | 100% | Yes |
| 1982 | 361 | 99% | Yes |
| 1983 | 334 | 92% | Yes |
| 1984 | 366 | 100% | Yes |
| 1985 | 364 | 100% | Yes |
| 1986 | 365 | 100% | Yes |
| 1987 | 365 | 100% | Yes |
| 1988 | 366 | 100% | Yes |
| 1989 | 362 | 99% | Yes |
| 1990 | 360 | 99% | Yes |
| 1991 | 365 | 100% | Yes |
| 1992 | 363 | 99% | Yes |
| 1993 | 365 | 100% | Yes |
| 1994 | 290 | 79% | No |
| 1995 | 343 | 94% | Yes |
| 1996 | 349 | 95% | Yes |
| 1997 | 357 | 98% | Yes |
| 1998 | 332 | 91% | Yes |
| 1999 | 281 | 77% | No |
| 2000 | 329 | 90% | No |
| 2001 | 315 | 86% | No |
| 2002 | 308 | 84% | No |
| 2003 | 351 | 96% | Yes |
| 2004 | 355 | 97% | Yes |
| 2005 | 354 | 97% | Yes |
| 2006 | 317 | 87% | No |
| 2007 | 353 | 97% | Yes |
| 2008 | 359 | 98% | Yes |
| 2009 | 350 | 96% | Yes |
| 2010 | 359 | 98% | Yes |
| 2011 | 361 | 99% | Yes |
| 2012 | 363 | 99% | Yes |
| 2013 | 155 | 42% | No |
| 2024 | 235 | 64% | No |
| 2025 | 359 | 98% | Yes |
| 2026 | 284 | 78% | No |
Latest Records
20| Date | Station | Record | Value | Beat old record by | Old record stood | Significance |
|---|---|---|---|---|---|---|
| 8 September 2026 | Powell, US | daily low max (Provisional) | 11.1 C (52.0 F) | 1.1 C (2.0 F) | 40 years | 19 of 100 (Routine) |
| 23 August 2026 | Powell, US | monthly high min (Tie, Provisional) | 15.0 C (59.0 F) | tie | 63 years | 8 of 100 (Routine) |
| 15 August 2026 | Powell, US | daily high min (Provisional) | 13.9 C (57.0 F) | 1.1 C (2.0 F) | 53 years | 25 of 100 (Routine) |
| 14 August 2026 | Powell, US | daily high min | 11.1 C (52.0 F) | 0.5 C (0.9 F) | 53 years | 23 of 100 (Routine) |
| 23 July 2026 | Powell, US | daily high min | 12.8 C (55.0 F) | 0.6 C (1.1 F) | 19 years | 13 of 100 (Routine) |
| 22 July 2026 | Powell, US | daily high min | 13.9 C (57.0 F) | 2.8 C (5.0 F) | 31 years | 24 of 100 (Routine) |
| 18 July 2026 | Powell, US | daily high min | 15.0 C (59.0 F) | 1.7 C (3.1 F) | 49 years | 25 of 100 (Routine) |
| 29 June 2026 | Powell, US | daily low max | 8.9 C (48.0 F) | 1.1 C (2.0 F) | 55 years | 23 of 100 (Routine) |
| 9 June 2026 | Powell, US | daily low min (Tie) | -0.6 C (30.9 F) | tie | 47 years | 5 of 100 (Routine) |
| 28 May 2026 | Powell, US | daily high min (Tie) | 8.9 C (48.0 F) | tie | 36 years | 4 of 100 (Routine) |
| 24 April 2026 | Powell, US | daily low max (Tie) | 5.0 C (41.0 F) | tie | 51 years | 5 of 100 (Routine) |
| 22 April 2026 | Powell, US | daily high max | 27.2 C (81.0 F) | 1.6 C (2.9 F) | 40 years | 20 of 100 (Routine) |
| 14 April 2026 | Powell, US | daily high min | 3.3 C (37.9 F) | 1.1 C (2.0 F) | 16 years | 14 of 100 (Routine) |
| 13 April 2026 | Powell, US | daily high min | 2.8 C (37.0 F) | 1.1 C (2.0 F) | 16 years | 14 of 100 (Routine) |
| 12 April 2026 | Powell, US | daily high min | 3.9 C (39.0 F) | 2.2 C (4.0 F) | 40 years | 26 of 100 (Routine) |
| 2 April 2026 | Powell, US | daily high min | 1.7 C (35.1 F) | 0.6 C (1.1 F) | 25 years | 15 of 100 (Routine) |
| 26 March 2026 | Powell, US | monthly high min | 2.8 C (37.0 F) | 1.1 C (2.0 F) | 47 years | 32 of 100 (Routine) |
| 21 March 2026 | Powell, US | daily high min | 1.1 C (34.0 F) | 0.5 C (0.9 F) | 41 years | 19 of 100 (Routine) |
| 18 March 2026 | Powell, US | daily high min (Tie) | 0.0 C (32.0 F) | tie | 41 years | 4 of 100 (Routine) |
| 15 March 2026 | Powell, US | daily low max (Tie) | 0.6 C (33.1 F) | tie | 61 years | 6 of 100 (Routine) |
Climate Trend
43 complete years, 1963 to 2025| Year | Annual mean temperature | Difference from the station mean |
|---|---|---|
| 1963 | 6.5 C | +0.54 C |
| 1964 | 4.9 C | -1.05 C |
| 1965 | 5.8 C | -0.16 C |
| 1966 | 6.3 C | +0.36 C |
| 1967 | 6.5 C | +0.58 C |
| 1968 | 5.7 C | -0.29 C |
| 1969 | 5.9 C | -0.07 C |
| 1971 | 5.3 C | -0.68 C |
| 1972 | 5.2 C | -0.76 C |
| 1973 | 5.9 C | -0.03 C |
| 1974 | 5.8 C | -0.13 C |
| 1975 | 4.8 C | -1.11 C |
| 1976 | 5.5 C | -0.42 C |
| 1977 | 5.6 C | -0.39 C |
| 1978 | 5.6 C | -0.31 C |
| 1979 | 5.8 C | -0.17 C |
| 1980 | 6.0 C | +0.03 C |
| 1981 | 6.8 C | +0.82 C |
| 1982 | 5.2 C | -0.77 C |
| 1984 | 5.8 C | -0.18 C |
| 1985 | 4.9 C | -1.08 C |
| 1986 | 6.7 C | +0.74 C |
| 1987 | 6.9 C | +0.97 C |
| 1988 | 7.0 C | +1.00 C |
| 1989 | 6.2 C | +0.27 C |
| 1990 | 6.6 C | +0.62 C |
| 1991 | 6.0 C | +0.04 C |
| 1992 | 6.6 C | +0.65 C |
| 1993 | 5.5 C | -0.49 C |
| 1995 | 6.0 C | +0.03 C |
| 1996 | 5.6 C | -0.38 C |
| 1997 | 5.9 C | -0.03 C |
| 1998 | 7.1 C | +1.19 C |
| 2003 | 6.6 C | +0.64 C |
| 2004 | 5.5 C | -0.46 C |
| 2005 | 5.7 C | -0.21 C |
| 2007 | 6.3 C | +0.32 C |
| 2008 | 5.1 C | -0.84 C |
| 2009 | 5.5 C | -0.44 C |
| 2010 | 6.1 C | +0.14 C |
| 2011 | 5.4 C | -0.52 C |
| 2012 | 6.3 C | +0.38 C |
| 2025 | 7.4 C | +1.49 C |
The fitted trend in annual mean temperature here over 1963 to 2025 is 0.10 C (-0.02 to 0.22) per decade. The interval includes zero, so the trend is not clearly different from zero. In Fahrenheit: 0.17 F (-0.05 to 0.40) per decade. The slope is a straight line fitted to 43 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 (-0.02 to 0.22) per decade | 0.17 F (-0.05 to 0.40) per decade | 1963 to 2025 | 43 | Not clearly different from zero |
| Mean daily maximum | 0.00 C (-0.18 to 0.18) per decade | 0.00 F (-0.33 to 0.32) per decade | 1963 to 2025 | 43 | Not clearly different from zero |
| Mean daily minimum | 0.2 C (0.1 to 0.3) per decade | 0.4 F (0.1 to 0.6) per decade | 1963 to 2025 | 43 | 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
1962 to 2026| Measure | Record | Year of the record | Median year | Years with a value |
|---|---|---|---|---|
| Hottest day (TXx) | 40.6 C (105.1 F) | 1969 | 36.7 C (98.1 F) | 55 |
| Coldest night (TNn) | -35.0 C (-31.0 F) | 1990 | -25.0 C (-13.0 F) | 55 |
| Wettest day (Rx1day) | 69.3 mm (2.7 in) | 1964 | 37.4 mm (1.5 in) | 52 |
| Wettest five days (Rx5day) | 167.4 mm (6.6 in) | 1964 | 72.9 mm (2.9 in) | 52 |
| Longest dry spell (CDD) | 87 days | 2012 | 22 days | 52 |
Hottest day (TXx)
| Year | Hottest day (TXx) |
|---|---|
| 1962 | 37.8 C (100.0 F) |
| 1963 | 34.4 C (93.9 F) |
| 1964 | 37.2 C (99.0 F) |
| 1965 | 35.6 C (96.1 F) |
| 1966 | 36.7 C (98.1 F) |
| 1967 | 38.3 C (100.9 F) |
| 1968 | 36.1 C (97.0 F) |
| 1969 | 40.6 C (105.1 F) |
| 1970 | 37.8 C (100.0 F) |
| 1971 | 37.2 C (99.0 F) |
| 1972 | 35.6 C (96.1 F) |
| 1973 | 38.9 C (102.0 F) |
| 1974 | 36.7 C (98.1 F) |
| 1975 | 37.8 C (100.0 F) |
| 1976 | 35.0 C (95.0 F) |
| 1977 | 36.1 C (97.0 F) |
| 1978 | 35.6 C (96.1 F) |
| 1979 | 36.7 C (98.1 F) |
| 1980 | 37.2 C (99.0 F) |
| 1981 | 36.7 C (98.1 F) |
| 1982 | 36.1 C (97.0 F) |
| 1983 | 34.4 C (93.9 F) |
| 1984 | 37.2 C (99.0 F) |
| 1985 | 38.3 C (100.9 F) |
| 1986 | 36.7 C (98.1 F) |
| 1987 | 35.6 C (96.1 F) |
| 1988 | 38.9 C (102.0 F) |
| 1989 | 36.7 C (98.1 F) |
| 1990 | 37.8 C (100.0 F) |
| 1991 | 38.3 C (100.9 F) |
| 1992 | 37.8 C (100.0 F) |
| 1993 | 33.9 C (93.0 F) |
| 1994 | 38.3 C (100.9 F) |
| 1995 | 38.3 C (100.9 F) |
| 1996 | 35.6 C (96.1 F) |
| 1997 | 34.4 C (93.9 F) |
| 1998 | 37.8 C (100.0 F) |
| 1999 | 35.0 C (95.0 F) |
| 2000 | 37.2 C (99.0 F) |
| 2001 | 36.1 C (97.0 F) |
| 2002 | 36.7 C (98.1 F) |
| 2003 | 37.8 C (100.0 F) |
| 2004 | 36.1 C (97.0 F) |
| 2005 | 36.1 C (97.0 F) |
| 2006 | 36.7 C (98.1 F) |
| 2007 | 37.8 C (100.0 F) |
| 2008 | 35.6 C (96.1 F) |
| 2009 | 35.0 C (95.0 F) |
| 2010 | 35.0 C (95.0 F) |
| 2011 | 35.0 C (95.0 F) |
| 2012 | 36.1 C (97.0 F) |
| 2013 | 28.3 C (82.9 F) |
| 2024 | 37.8 C (100.0 F) |
| 2025 | 37.2 C (99.0 F) |
| 2026 | 36.1 C (97.0 F) |
Coldest night (TNn)
| Year | Coldest night (TNn) |
|---|---|
| 1962 | -21.7 C (-7.1 F) |
| 1963 | -32.8 C (-27.0 F) |
| 1964 | -33.3 C (-27.9 F) |
| 1965 | -24.4 C (-11.9 F) |
| 1966 | -21.7 C (-7.1 F) |
| 1967 | -23.9 C (-11.0 F) |
| 1968 | -27.8 C (-18.0 F) |
| 1969 | -23.9 C (-11.0 F) |
| 1970 | -20.6 C (-5.1 F) |
| 1971 | -22.2 C (-8.0 F) |
| 1972 | -29.4 C (-20.9 F) |
| 1973 | -27.2 C (-17.0 F) |
| 1974 | -29.4 C (-20.9 F) |
| 1975 | -23.9 C (-11.0 F) |
| 1976 | -26.7 C (-16.1 F) |
| 1977 | -23.3 C (-9.9 F) |
| 1978 | -30.0 C (-22.0 F) |
| 1979 | -33.3 C (-27.9 F) |
| 1980 | -28.9 C (-20.0 F) |
| 1981 | -26.7 C (-16.1 F) |
| 1982 | -30.0 C (-22.0 F) |
| 1983 | -32.8 C (-27.0 F) |
| 1984 | -26.7 C (-16.1 F) |
| 1985 | -28.9 C (-20.0 F) |
| 1986 | -18.3 C (-0.9 F) |
| 1987 | -25.0 C (-13.0 F) |
| 1988 | -23.3 C (-9.9 F) |
| 1989 | -31.7 C (-25.1 F) |
| 1990 | -35.0 C (-31.0 F) |
| 1991 | -24.4 C (-11.9 F) |
| 1992 | -22.2 C (-8.0 F) |
| 1993 | -25.0 C (-13.0 F) |
| 1994 | -19.4 C (-2.9 F) |
| 1995 | -23.9 C (-11.0 F) |
| 1996 | -27.8 C (-18.0 F) |
| 1997 | -23.3 C (-9.9 F) |
| 1998 | -32.8 C (-27.0 F) |
| 1999 | -18.3 C (-0.9 F) |
| 2000 | -21.1 C (-6.0 F) |
| 2001 | -19.4 C (-2.9 F) |
| 2002 | -22.2 C (-8.0 F) |
| 2003 | -20.6 C (-5.1 F) |
| 2004 | -28.3 C (-18.9 F) |
| 2005 | -25.0 C (-13.0 F) |
| 2006 | -27.2 C (-17.0 F) |
| 2007 | -27.8 C (-18.0 F) |
| 2008 | -26.1 C (-15.0 F) |
| 2009 | -25.0 C (-13.0 F) |
| 2010 | -25.6 C (-14.1 F) |
| 2011 | -25.6 C (-14.1 F) |
| 2012 | -17.8 C (0.0 F) |
| 2013 | -16.7 C (1.9 F) |
| 2024 | -10.0 C (14.0 F) |
| 2025 | -25.0 C (-13.0 F) |
| 2026 | -15.0 C (5.0 F) |
Wettest day (Rx1day)
| Year | Wettest day (Rx1day) |
|---|---|
| 1962 | 46.2 mm (1.8 in) |
| 1963 | 42.2 mm (1.7 in) |
| 1964 | 69.3 mm (2.7 in) |
| 1965 | 54.1 mm (2.1 in) |
| 1966 | 39.4 mm (1.6 in) |
| 1967 | 42.9 mm (1.7 in) |
| 1968 | 31.0 mm (1.2 in) |
| 1969 | 31.8 mm (1.3 in) |
| 1970 | 40.4 mm (1.6 in) |
| 1971 | 33.5 mm (1.3 in) |
| 1972 | 49.8 mm (2.0 in) |
| 1973 | 34.3 mm (1.4 in) |
| 1974 | 32.0 mm (1.3 in) |
| 1975 | 49.5 mm (1.9 in) |
| 1976 | 25.9 mm (1.0 in) |
| 1977 | 53.3 mm (2.1 in) |
| 1978 | 39.9 mm (1.6 in) |
| 1979 | 36.1 mm (1.4 in) |
| 1980 | 46.2 mm (1.8 in) |
| 1981 | 29.2 mm (1.1 in) |
| 1982 | 42.7 mm (1.7 in) |
| 1983 | 32.5 mm (1.3 in) |
| 1984 | 31.5 mm (1.2 in) |
| 1985 | 26.7 mm (1.1 in) |
| 1986 | 33.8 mm (1.3 in) |
| 1987 | 25.9 mm (1.0 in) |
| 1988 | 24.4 mm (1.0 in) |
| 1989 | 45.7 mm (1.8 in) |
| 1990 | 38.1 mm (1.5 in) |
| 1991 | 36.1 mm (1.4 in) |
| 1992 | 49.8 mm (2.0 in) |
| 1993 | 27.9 mm (1.1 in) |
| 1994 | 50.8 mm (2.0 in) |
| 1995 | 58.4 mm (2.3 in) |
| 1996 | 66.8 mm (2.6 in) |
| 1997 | 44.5 mm (1.8 in) |
| 1998 | 29.5 mm (1.2 in) |
| 1999 | 45.7 mm (1.8 in) |
| 2000 | 33.0 mm (1.3 in) |
| 2001 | 41.9 mm (1.6 in) |
| 2002 | 32.3 mm (1.3 in) |
| 2003 | 46.7 mm (1.8 in) |
| 2004 | 28.4 mm (1.1 in) |
| 2005 | 33.0 mm (1.3 in) |
| 2006 | 57.2 mm (2.3 in) |
| 2007 | 25.9 mm (1.0 in) |
| 2008 | 53.6 mm (2.1 in) |
| 2009 | 39.9 mm (1.6 in) |
| 2010 | 32.8 mm (1.3 in) |
| 2011 | 32.8 mm (1.3 in) |
| 2012 | 36.6 mm (1.4 in) |
| 2013 | 15.2 mm (0.6 in) |
| 2024 | n/a |
| 2025 | n/a |
| 2026 | n/a |
Wettest five days (Rx5day)
| Year | Wettest five days (Rx5day) |
|---|---|
| 1962 | 109.7 mm (4.3 in) |
| 1963 | 86.5 mm (3.4 in) |
| 1964 | 167.4 mm (6.6 in) |
| 1965 | 95.0 mm (3.7 in) |
| 1966 | 98.3 mm (3.9 in) |
| 1967 | 78.6 mm (3.1 in) |
| 1968 | 72.6 mm (2.9 in) |
| 1969 | 106.3 mm (4.2 in) |
| 1970 | 70.8 mm (2.8 in) |
| 1971 | 93.2 mm (3.7 in) |
| 1972 | 112.3 mm (4.4 in) |
| 1973 | 58.7 mm (2.3 in) |
| 1974 | 103.7 mm (4.1 in) |
| 1975 | 114.0 mm (4.5 in) |
| 1976 | 61.4 mm (2.4 in) |
| 1977 | 100.4 mm (4.0 in) |
| 1978 | 59.2 mm (2.3 in) |
| 1979 | 65.8 mm (2.6 in) |
| 1980 | 113.5 mm (4.5 in) |
| 1981 | 80.1 mm (3.2 in) |
| 1982 | 75.2 mm (3.0 in) |
| 1983 | 92.2 mm (3.6 in) |
| 1984 | 69.9 mm (2.8 in) |
| 1985 | 82.1 mm (3.2 in) |
| 1986 | 71.6 mm (2.8 in) |
| 1987 | 58.4 mm (2.3 in) |
| 1988 | 64.5 mm (2.5 in) |
| 1989 | 71.7 mm (2.8 in) |
| 1990 | 71.5 mm (2.8 in) |
| 1991 | 60.0 mm (2.4 in) |
| 1992 | 67.6 mm (2.7 in) |
| 1993 | 52.8 mm (2.1 in) |
| 1994 | 65.1 mm (2.6 in) |
| 1995 | 140.2 mm (5.5 in) |
| 1996 | 135.7 mm (5.3 in) |
| 1997 | 99.4 mm (3.9 in) |
| 1998 | 69.7 mm (2.7 in) |
| 1999 | 70.3 mm (2.8 in) |
| 2000 | 65.5 mm (2.6 in) |
| 2001 | 59.3 mm (2.3 in) |
| 2002 | 73.2 mm (2.9 in) |
| 2003 | 106.1 mm (4.2 in) |
| 2004 | 82.8 mm (3.3 in) |
| 2005 | 40.1 mm (1.6 in) |
| 2006 | 46.3 mm (1.8 in) |
| 2007 | 81.6 mm (3.2 in) |
| 2008 | 81.1 mm (3.2 in) |
| 2009 | 100.3 mm (3.9 in) |
| 2010 | 48.7 mm (1.9 in) |
| 2011 | 62.2 mm (2.4 in) |
| 2012 | 53.1 mm (2.1 in) |
| 2013 | 20.6 mm (0.8 in) |
| 2024 | n/a |
| 2025 | n/a |
| 2026 | n/a |
Longest dry spell (CDD)
| Year | Longest dry spell (CDD) |
|---|---|
| 1962 | 20 days |
| 1963 | 23 days |
| 1964 | 14 days |
| 1965 | 15 days |
| 1966 | 43 days |
| 1967 | 40 days |
| 1968 | 14 days |
| 1969 | 38 days |
| 1970 | 25 days |
| 1971 | 16 days |
| 1972 | 14 days |
| 1973 | 25 days |
| 1974 | 20 days |
| 1975 | 15 days |
| 1976 | 16 days |
| 1977 | 29 days |
| 1978 | 21 days |
| 1979 | 25 days |
| 1980 | 18 days |
| 1981 | 34 days |
| 1982 | 12 days |
| 1983 | 13 days |
| 1984 | 34 days |
| 1985 | 31 days |
| 1986 | 20 days |
| 1987 | 35 days |
| 1988 | 27 days |
| 1989 | 15 days |
| 1990 | 23 days |
| 1991 | 32 days |
| 1992 | 16 days |
| 1993 | 19 days |
| 1994 | 38 days |
| 1995 | 13 days |
| 1996 | 24 days |
| 1997 | 14 days |
| 1998 | 14 days |
| 1999 | 25 days |
| 2000 | 22 days |
| 2001 | 38 days |
| 2002 | 20 days |
| 2003 | 24 days |
| 2004 | 17 days |
| 2005 | 40 days |
| 2006 | 23 days |
| 2007 | 22 days |
| 2008 | 36 days |
| 2009 | 13 days |
| 2010 | 21 days |
| 2011 | 15 days |
| 2012 | 87 days |
| 2013 | 8 days |
| 2024 | n/a |
| 2025 | n/a |
| 2026 | n/a |
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
43 years with a frostAcross 43 years with a frost, the median last spring frost at Powell falls on 7 June and the median first autumn frost on 7 September, which leaves a median of 86 days between them.
Fitted over all years, the growing season changes by +4.8 days per decade at this station.
| Measure | Median, all years | Earliest period | Recent period (1977 to 2025) | Recent against earliest | Fitted trend |
|---|---|---|---|---|---|
| Last spring frost | 7 June | n/a | 5 June | n/a | -1.7 days per decade |
| First autumn frost | 7 September | n/a | 9 September | n/a | +3.1 days per decade |
| Growing days | 86 days | n/a | 89 days | n/a | +4.8 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
39 years, 1963 to 2003A day with at least 37.7 mm (1.5 in) of rain is expected about once in 2 years. A day with at least 76.6 mm (3.0 in) of rain is expected about once in 100 years.
| Expected about once in | A day with at least | Note |
|---|---|---|
| 2 years | 37.7 mm (1.5 in) | |
| 5 years | 47.6 mm (1.9 in) | |
| 10 years | 54.4 mm (2.1 in) | |
| 25 years | 63.1 mm (2.5 in) | |
| 50 years | 69.8 mm (2.7 in) | Longer than the 39 years of record |
| 100 years | 76.6 mm (3.0 in) | Longer than the 39 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, 39 years of values from 1963 to 2003.
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: 69.3 mm (2.7 in) in 1964; 66.8 mm (2.6 in) in 1996; 58.4 mm (2.3 in) in 1995.
Station Changes
1 suspectedOne change was suspected in the annual mean temperature of Powell, at 2004. Each is measured against neighbouring stations.
- Relative to 5 neighbouring stations, the station's annual mean temperature from 2004 ran 0.5 C (0.9 F) lower than in the years before (likely change).
| Year | Shift (C) | Shift (F) | Strength | Neighbours |
|---|---|---|---|---|
| 2004 | -0.5 | -0.9 | 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.
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 2026-10-13 (13 October 2026). Records are computed by this site and are not official.
Data as of . Last revised (2026-10-13).