Sonnette 7 SW Weather Records (USC00247740)
Record envelope, standing records and threshold days for Sonnette 7 SW (USC00247740), Montana, United States, with 60 years of record.
Key Facts for Sonnette 7 SW
- Sonnette 7 SW (USC00247740) is a weather station in Montana, United States at 45.32 latitude and -105.91 longitude, 1,193 m (3,914 ft) above sea level.
- The station reports from 1965 to 2024, 60 years of record.
- 1,464 records set at Sonnette 7 SW still stand.
- Records are tracked for tmax, tmin, prcp, snow, snwd: an element needs 30 years of data to be eligible.
- Sonnette 7 SW set a daily record low maximum temperature of 18.9 C (66.0 F) on 7 August 2024.
About the Station
- Location: Montana, United States, 45.32 latitude, -105.91 longitude.
- Elevation: 1,193 m (3,914 ft).
- Period of record: 1965 to 2024, 60 years.
- Eligible elements: tmax, tmin, prcp, snow, snwd.
Daily Record Envelope and 2026
0 days at or beyond a record| Month | Highest record high | Lowest record low | 2026 highest maximum | 2026 lowest minimum |
|---|---|---|---|---|
| Jan | 20.0 C (68.0 F) | -40.0 C (-40.0 F) | n/a | n/a |
| Feb | 21.1 C (70.0 F) | -41.1 C (-42.0 F) | n/a | n/a |
| Mar | 26.7 C (80.1 F) | -36.1 C (-33.0 F) | n/a | n/a |
| Apr | 30.6 C (87.1 F) | -22.2 C (-8.0 F) | n/a | n/a |
| May | 39.4 C (102.9 F) | -11.7 C (10.9 F) | n/a | n/a |
| Jun | 40.6 C (105.1 F) | -3.3 C (26.1 F) | n/a | n/a |
| Jul | 41.7 C (107.1 F) | 0.6 C (33.1 F) | n/a | n/a |
| Aug | 39.4 C (102.9 F) | -3.9 C (25.0 F) | n/a | n/a |
| Sep | 38.9 C (102.0 F) | -12.2 C (10.0 F) | n/a | n/a |
| Oct | 32.8 C (91.0 F) | -26.7 C (-16.1 F) | n/a | n/a |
| Nov | 25.0 C (77.0 F) | -31.7 C (-25.1 F) | n/a | n/a |
| Dec | 21.7 C (71.1 F) | -42.2 C (-44.0 F) | n/a | n/a |
Which Years Hold Standing Records
1,464 standing records| Year set | Standing records |
|---|---|
| 1965 | 8 |
| 1966 | 30 |
| 1967 | 18 |
| 1968 | 25 |
| 1969 | 32 |
| 1970 | 15 |
| 1971 | 28 |
| 1972 | 29 |
| 1973 | 20 |
| 1974 | 16 |
| 1975 | 16 |
| 1976 | 17 |
| 1977 | 14 |
| 1978 | 16 |
| 1979 | 16 |
| 1980 | 29 |
| 1981 | 23 |
| 1982 | 27 |
| 1983 | 33 |
| 1984 | 26 |
| 1985 | 43 |
| 1986 | 32 |
| 1987 | 33 |
| 1988 | 41 |
| 1989 | 40 |
| 1990 | 30 |
| 1991 | 27 |
| 1992 | 43 |
| 1993 | 27 |
| 1994 | 19 |
| 1995 | 29 |
| 1996 | 41 |
| 1997 | 37 |
| 1998 | 13 |
| 1999 | 11 |
| 2000 | 20 |
| 2001 | 12 |
| 2002 | 36 |
| 2003 | 29 |
| 2004 | 18 |
| 2005 | 26 |
| 2006 | 20 |
| 2007 | 17 |
| 2008 | 15 |
| 2009 | 33 |
| 2010 | 8 |
| 2011 | 10 |
| 2012 | 19 |
| 2013 | 28 |
| 2014 | 25 |
| 2015 | 32 |
| 2016 | 20 |
| 2017 | 32 |
| 2018 | 18 |
| 2019 | 18 |
| 2020 | 27 |
| 2021 | 35 |
| 2022 | 23 |
| 2023 | 22 |
| 2024 | 17 |
All-Time Record Progression
5 new records| Date | Kind | Detail |
|---|---|---|
| 2000-08-10 | Record high minimum temperature | Record high minimum temperature 22.8 C (73.0 F) |
| 2007-06-07 | Record daily precipitation | Record daily precipitation 74.9 mm (2.9 in) |
| 2013-05-30 | Record daily precipitation | Record daily precipitation 76.7 mm (3.0 in) |
| 2015-08-12 | Record high minimum temperature | Record high minimum temperature 23.9 C (75.0 F) |
| 2021-07-27 | Record high maximum temperature | Record high maximum temperature 41.7 C (107.1 F) |
Wettest Day of Each Month
May: 76.7 mm (3.0 in)| Month | Record daily precipitation (mm) | Date |
|---|---|---|
| Jan | 18.5 mm (0.7 in) | 18 January 1975 |
| Feb | 35.6 mm (1.4 in) | 26 February 1999 |
| Mar | 27.9 mm (1.1 in) | 30 March 2009 |
| Apr | 62.0 mm (2.4 in) | 26 April 1984 |
| May | 76.7 mm (3.0 in) | 30 May 2013 |
| Jun | 74.9 mm (2.9 in) | 7 June 2007 |
| Jul | 59.9 mm (2.4 in) | 3 July 1974 |
| Aug | 65.5 mm (2.6 in) | 15 August 1980 |
| Sep | 61.2 mm (2.4 in) | 22 September 2023 |
| Oct | 44.7 mm (1.8 in) | 31 October 1974 |
| Nov | 35.1 mm (1.4 in) | 9 November 1978 |
| Dec | 25.7 mm (1.0 in) | 23 December 1984 |
Period of Record Coverage
1965 to 2024| Year | Days with data | Share of year | Complete |
|---|---|---|---|
| 1965 | 92 | 25% | No |
| 1966 | 360 | 99% | Yes |
| 1967 | 357 | 98% | Yes |
| 1968 | 366 | 100% | Yes |
| 1969 | 359 | 98% | Yes |
| 1970 | 346 | 95% | Yes |
| 1971 | 356 | 98% | Yes |
| 1972 | 320 | 87% | No |
| 1973 | 363 | 99% | Yes |
| 1974 | 362 | 99% | Yes |
| 1975 | 356 | 98% | Yes |
| 1976 | 311 | 85% | No |
| 1977 | 339 | 93% | Yes |
| 1978 | 319 | 87% | No |
| 1979 | 360 | 99% | Yes |
| 1980 | 349 | 95% | Yes |
| 1981 | 356 | 98% | Yes |
| 1982 | 359 | 98% | Yes |
| 1983 | 361 | 99% | Yes |
| 1984 | 350 | 96% | Yes |
| 1985 | 356 | 98% | Yes |
| 1986 | 364 | 100% | Yes |
| 1987 | 365 | 100% | Yes |
| 1988 | 361 | 99% | Yes |
| 1989 | 364 | 100% | Yes |
| 1990 | 360 | 99% | Yes |
| 1991 | 363 | 99% | Yes |
| 1992 | 364 | 99% | Yes |
| 1993 | 365 | 100% | Yes |
| 1994 | 333 | 91% | Yes |
| 1995 | 363 | 99% | Yes |
| 1996 | 331 | 90% | Yes |
| 1997 | 335 | 92% | Yes |
| 1998 | 359 | 98% | Yes |
| 1999 | 333 | 91% | Yes |
| 2000 | 325 | 89% | No |
| 2001 | 365 | 100% | Yes |
| 2002 | 363 | 99% | Yes |
| 2003 | 365 | 100% | Yes |
| 2004 | 365 | 100% | Yes |
| 2005 | 365 | 100% | Yes |
| 2006 | 365 | 100% | Yes |
| 2007 | 365 | 100% | Yes |
| 2008 | 365 | 100% | Yes |
| 2009 | 364 | 100% | Yes |
| 2010 | 365 | 100% | Yes |
| 2011 | 364 | 100% | Yes |
| 2012 | 366 | 100% | Yes |
| 2013 | 310 | 85% | No |
| 2014 | 346 | 95% | Yes |
| 2015 | 348 | 95% | Yes |
| 2016 | 366 | 100% | Yes |
| 2017 | 365 | 100% | Yes |
| 2018 | 365 | 100% | Yes |
| 2019 | 365 | 100% | Yes |
| 2020 | 365 | 100% | Yes |
| 2021 | 364 | 100% | Yes |
| 2022 | 365 | 100% | Yes |
| 2023 | 365 | 100% | Yes |
| 2024 | 222 | 61% | No |
Latest Records
20| Date | Station | Record | Value | Beat old record by | Old record stood | Significance |
|---|---|---|---|---|---|---|
| 7 August 2024 | Sonnette 7 SW, US | daily low max | 18.9 C (66.0 F) | 1.7 C (3.1 F) | 58 years | 26 of 100 (Routine) |
| 4 August 2024 | Sonnette 7 SW, US | daily high min | 20.0 C (68.0 F) | 1.1 C (2.0 F) | 23 years | 14 of 100 (Routine) |
| 2 August 2024 | Sonnette 7 SW, US | daily high max | 38.3 C (100.9 F) | 1.6 C (2.9 F) | 28 years | 17 of 100 (Routine) |
| 19 June 2024 | Sonnette 7 SW, US | daily low min | -0.6 C (30.9 F) | 2.3 C (4.1 F) | 39 years | 22 of 100 (Routine) |
| 28 May 2024 | Sonnette 7 SW, US | daily high min | 12.8 C (55.0 F) | 1.1 C (2.0 F) | 34 years | 18 of 100 (Routine) |
| 13 May 2024 | Sonnette 7 SW, US | daily high min (Tie) | 9.4 C (48.9 F) | tie | 23 years | 3 of 100 (Routine) |
| 7 May 2024 | Sonnette 7 SW, US | daily rain | 29.2 mm (1.1 in) | 5.6 mm (0.22 in) | 46 years | 24 of 100 (Routine) |
| 20 April 2024 | Sonnette 7 SW, US | daily low min (Tie) | -12.2 C (10.0 F) | tie | 58 years | 5 of 100 (Routine) |
| 16 April 2024 | Sonnette 7 SW, US | daily high min (Tie) | 6.1 C (43.0 F) | tie | 46 years | 4 of 100 (Routine) |
| 13 April 2024 | Sonnette 7 SW, US | daily high max (Tie) | 25.0 C (77.0 F) | tie | 8 years | 2 of 100 (Routine) |
| 12 April 2024 | Sonnette 7 SW, US | daily snow depth | 22.9 cm (9.0 in) | 2.6 cm (1.0 in) | 2 years | 6 of 100 (Routine) |
| 11 April 2024 | Sonnette 7 SW, US | daily snow depth | 27.9 cm (11.0 in) | 20.3 cm (8.0 in) | 4 years | 14 of 100 (Routine) |
| 10 April 2024 | Sonnette 7 SW, US | daily snow depth | 35.6 cm (14.0 in) | 25.4 cm (10.0 in) | 7 years | 17 of 100 (Routine) |
| 9 April 2024 | Sonnette 7 SW, US | daily snow depth | 40.6 cm (16.0 in) | 25.4 cm (10.0 in) | 7 years | 17 of 100 (Routine) |
| 8 April 2024 | Sonnette 7 SW, US | daily snow depth | 50.8 cm (20.0 in) | 48.3 cm (19.0 in) | 55 years | 39 of 100 (Notable) |
| 8 April 2024 | Sonnette 7 SW, US | daily snowfall | 12.7 cm (5.0 in) | 9.7 cm (3.8 in) | 6 years | 15 of 100 (Routine) |
| 7 April 2024 | Sonnette 7 SW, US | daily snowfall | 45.7 cm (18.0 in) | 45.7 cm (18.0 in) | 58 years | 61 of 100 (Major) |
| 7 April 2024 | Sonnette 7 SW, US | daily rain | 38.9 mm (1.5 in) | 23.4 mm (0.9 in) | 18 years | 39 of 100 (Notable) |
| 7 April 2024 | Sonnette 7 SW, US | daily snow depth | 40.6 cm (16.0 in) | 35.5 cm (14.0 in) | 6 years | 20 of 100 (Routine) |
| 5 April 2024 | Sonnette 7 SW, US | daily high min | 6.1 C (43.0 F) | 2.2 C (4.0 F) | 33 years | 19 of 100 (Routine) |
Climate Trend
46 complete years, 1966 to 2023| Year | Annual mean temperature | Difference from the station mean |
|---|---|---|
| 1966 | 6.5 C | 0.00 C |
| 1967 | 5.9 C | -0.55 C |
| 1968 | 5.2 C | -1.23 C |
| 1969 | 5.8 C | -0.67 C |
| 1970 | 5.9 C | -0.59 C |
| 1973 | 6.5 C | +0.06 C |
| 1974 | 6.8 C | +0.29 C |
| 1975 | 5.1 C | -1.33 C |
| 1977 | 6.2 C | -0.30 C |
| 1978 | 4.8 C | -1.68 C |
| 1979 | 5.5 C | -0.97 C |
| 1980 | 6.8 C | +0.38 C |
| 1981 | 7.7 C | +1.19 C |
| 1982 | 5.0 C | -1.50 C |
| 1983 | 6.2 C | -0.25 C |
| 1984 | 6.2 C | -0.28 C |
| 1986 | 7.1 C | +0.64 C |
| 1987 | 7.7 C | +1.24 C |
| 1988 | 7.8 C | +1.32 C |
| 1989 | 5.9 C | -0.53 C |
| 1990 | 6.9 C | +0.39 C |
| 1991 | 7.2 C | +0.73 C |
| 1992 | 7.2 C | +0.70 C |
| 1993 | 5.0 C | -1.43 C |
| 1995 | 6.6 C | +0.18 C |
| 1998 | 7.1 C | +0.64 C |
| 2001 | 6.9 C | +0.42 C |
| 2002 | 5.9 C | -0.60 C |
| 2003 | 6.5 C | +0.05 C |
| 2004 | 6.6 C | +0.15 C |
| 2005 | 6.4 C | -0.09 C |
| 2006 | 7.2 C | +0.72 C |
| 2007 | 6.6 C | +0.17 C |
| 2008 | 5.0 C | -1.49 C |
| 2009 | 5.1 C | -1.36 C |
| 2010 | 5.7 C | -0.81 C |
| 2011 | 5.6 C | -0.91 C |
| 2012 | 7.5 C | +1.05 C |
| 2016 | 8.6 C | +2.18 C |
| 2017 | 7.8 C | +1.32 C |
| 2018 | 6.3 C | -0.20 C |
| 2019 | 5.6 C | -0.88 C |
| 2020 | 7.5 C | +1.07 C |
| 2021 | 8.1 C | +1.60 C |
| 2022 | 6.9 C | +0.45 C |
| 2023 | 7.4 C | +0.90 C |
The annual mean temperature here has risen by 0.18 C (0.03 to 0.34) per decade over 1966 to 2023. In Fahrenheit: 0.33 F (0.05 to 0.60) per decade. The slope is a straight line fitted to 46 complete years; the brackets give its 95 percent interval.
| Measure | Per decade (C) | Per decade (F) | Period | Complete years | Reading |
|---|---|---|---|---|---|
| Annual mean temperature | 0.18 C (0.03 to 0.34) per decade | 0.33 F (0.05 to 0.60) per decade | 1966 to 2023 | 46 | Rise |
| Mean daily maximum | 0.18 C (-0.01 to 0.37) per decade | 0.32 F (-0.02 to 0.67) per decade | 1966 to 2023 | 46 | Not clearly different from zero |
| Mean daily minimum | 0.2 C (0.1 to 0.3) per decade | 0.3 F (0.1 to 0.6) per decade | 1966 to 2023 | 46 | 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
1965 to 2024| Measure | Record | Year of the record | Median year | Years with a value |
|---|---|---|---|---|
| Hottest day (TXx) | 41.7 C (107.1 F) | 2021 | 37.8 C (100.0 F) | 60 |
| Coldest night (TNn) | -42.2 C (-44.0 F) | 1983 | -33.0 C (-27.5 F) | 60 |
| Wettest day (Rx1day) | 76.7 mm (3.0 in) | 2013 | 39.4 mm (1.5 in) | 60 |
| Wettest five days (Rx5day) | 142.5 mm (5.6 in) | 1978 | 56.5 mm (2.2 in) | 60 |
| Longest dry spell (CDD) | 68 days | 2001 | 36 days | 60 |
Hottest day (TXx)
| Year | Hottest day (TXx) |
|---|---|
| 1965 | 29.4 C (84.9 F) |
| 1966 | 39.4 C (102.9 F) |
| 1967 | 36.1 C (97.0 F) |
| 1968 | 35.0 C (95.0 F) |
| 1969 | 39.4 C (102.9 F) |
| 1970 | 37.2 C (99.0 F) |
| 1971 | 38.3 C (100.9 F) |
| 1972 | 37.2 C (99.0 F) |
| 1973 | 36.7 C (98.1 F) |
| 1974 | 36.7 C (98.1 F) |
| 1975 | 37.8 C (100.0 F) |
| 1976 | 37.8 C (100.0 F) |
| 1977 | 39.4 C (102.9 F) |
| 1978 | 37.2 C (99.0 F) |
| 1979 | 37.2 C (99.0 F) |
| 1980 | 38.9 C (102.0 F) |
| 1981 | 38.3 C (100.9 F) |
| 1982 | 37.2 C (99.0 F) |
| 1983 | 40.0 C (104.0 F) |
| 1984 | 37.8 C (100.0 F) |
| 1985 | 37.2 C (99.0 F) |
| 1986 | 37.2 C (99.0 F) |
| 1987 | 35.0 C (95.0 F) |
| 1988 | 40.6 C (105.1 F) |
| 1989 | 40.0 C (104.0 F) |
| 1990 | 36.1 C (97.0 F) |
| 1991 | 38.3 C (100.9 F) |
| 1992 | 36.1 C (97.0 F) |
| 1993 | 32.8 C (91.0 F) |
| 1994 | 37.2 C (99.0 F) |
| 1995 | 38.3 C (100.9 F) |
| 1996 | 38.9 C (102.0 F) |
| 1997 | 35.6 C (96.1 F) |
| 1998 | 38.9 C (102.0 F) |
| 1999 | 37.2 C (99.0 F) |
| 2000 | 36.1 C (97.0 F) |
| 2001 | 38.9 C (102.0 F) |
| 2002 | 40.0 C (104.0 F) |
| 2003 | 37.8 C (100.0 F) |
| 2004 | 37.8 C (100.0 F) |
| 2005 | 37.8 C (100.0 F) |
| 2006 | 38.9 C (102.0 F) |
| 2007 | 38.9 C (102.0 F) |
| 2008 | 35.0 C (95.0 F) |
| 2009 | 35.6 C (96.1 F) |
| 2010 | 35.6 C (96.1 F) |
| 2011 | 35.0 C (95.0 F) |
| 2012 | 40.0 C (104.0 F) |
| 2013 | 37.8 C (100.0 F) |
| 2014 | 37.2 C (99.0 F) |
| 2015 | 37.8 C (100.0 F) |
| 2016 | 37.8 C (100.0 F) |
| 2017 | 37.8 C (100.0 F) |
| 2018 | 39.4 C (102.9 F) |
| 2019 | 35.6 C (96.1 F) |
| 2020 | 37.8 C (100.0 F) |
| 2021 | 41.7 C (107.1 F) |
| 2022 | 38.9 C (102.0 F) |
| 2023 | 36.7 C (98.1 F) |
| 2024 | 38.3 C (100.9 F) |
Coldest night (TNn)
| Year | Coldest night (TNn) |
|---|---|
| 1965 | -25.6 C (-14.1 F) |
| 1966 | -30.6 C (-23.1 F) |
| 1967 | -33.9 C (-29.0 F) |
| 1968 | -33.3 C (-27.9 F) |
| 1969 | -35.6 C (-32.1 F) |
| 1970 | -31.7 C (-25.1 F) |
| 1971 | -35.0 C (-31.0 F) |
| 1972 | -36.7 C (-34.1 F) |
| 1973 | -32.2 C (-26.0 F) |
| 1974 | -33.3 C (-27.9 F) |
| 1975 | -34.4 C (-29.9 F) |
| 1976 | -32.2 C (-26.0 F) |
| 1977 | -35.0 C (-31.0 F) |
| 1978 | -35.6 C (-32.1 F) |
| 1979 | -34.4 C (-29.9 F) |
| 1980 | -31.1 C (-24.0 F) |
| 1981 | -30.0 C (-22.0 F) |
| 1982 | -36.7 C (-34.1 F) |
| 1983 | -42.2 C (-44.0 F) |
| 1984 | -32.8 C (-27.0 F) |
| 1985 | -38.9 C (-38.0 F) |
| 1986 | -31.1 C (-24.0 F) |
| 1987 | -24.4 C (-11.9 F) |
| 1988 | -30.0 C (-22.0 F) |
| 1989 | -41.1 C (-42.0 F) |
| 1990 | -38.3 C (-36.9 F) |
| 1991 | -32.2 C (-26.0 F) |
| 1992 | -30.6 C (-23.1 F) |
| 1993 | -32.8 C (-27.0 F) |
| 1994 | -31.7 C (-25.1 F) |
| 1995 | -28.9 C (-20.0 F) |
| 1996 | -40.0 C (-40.0 F) |
| 1997 | -37.2 C (-35.0 F) |
| 1998 | -35.0 C (-31.0 F) |
| 1999 | -25.6 C (-14.1 F) |
| 2000 | -30.0 C (-22.0 F) |
| 2001 | -27.2 C (-17.0 F) |
| 2002 | -28.9 C (-20.0 F) |
| 2003 | -35.0 C (-31.0 F) |
| 2004 | -35.6 C (-32.1 F) |
| 2005 | -32.8 C (-27.0 F) |
| 2006 | -32.8 C (-27.0 F) |
| 2007 | -30.0 C (-22.0 F) |
| 2008 | -33.3 C (-27.9 F) |
| 2009 | -31.7 C (-25.1 F) |
| 2010 | -31.1 C (-24.0 F) |
| 2011 | -34.4 C (-29.9 F) |
| 2012 | -24.4 C (-11.9 F) |
| 2013 | -36.1 C (-33.0 F) |
| 2014 | -35.0 C (-31.0 F) |
| 2015 | -30.6 C (-23.1 F) |
| 2016 | -31.7 C (-25.1 F) |
| 2017 | -32.8 C (-27.0 F) |
| 2018 | -33.3 C (-27.9 F) |
| 2019 | -36.1 C (-33.0 F) |
| 2020 | -24.4 C (-11.9 F) |
| 2021 | -36.1 C (-33.0 F) |
| 2022 | -36.7 C (-34.1 F) |
| 2023 | -33.9 C (-29.0 F) |
| 2024 | -40.0 C (-40.0 F) |
Wettest day (Rx1day)
| Year | Wettest day (Rx1day) |
|---|---|
| 1965 | 3.0 mm (0.12 in) |
| 1966 | 14.7 mm (0.6 in) |
| 1967 | 46.5 mm (1.8 in) |
| 1968 | 43.2 mm (1.7 in) |
| 1969 | 38.9 mm (1.5 in) |
| 1970 | 59.4 mm (2.3 in) |
| 1971 | 42.4 mm (1.7 in) |
| 1972 | 22.6 mm (0.9 in) |
| 1973 | 30.5 mm (1.2 in) |
| 1974 | 59.9 mm (2.4 in) |
| 1975 | 41.1 mm (1.6 in) |
| 1976 | 37.1 mm (1.5 in) |
| 1977 | 23.9 mm (0.9 in) |
| 1978 | 72.9 mm (2.9 in) |
| 1979 | 27.4 mm (1.1 in) |
| 1980 | 65.5 mm (2.6 in) |
| 1981 | 20.6 mm (0.8 in) |
| 1982 | 33.5 mm (1.3 in) |
| 1983 | 14.2 mm (0.6 in) |
| 1984 | 62.0 mm (2.4 in) |
| 1985 | 33.3 mm (1.3 in) |
| 1986 | 56.6 mm (2.2 in) |
| 1987 | 26.7 mm (1.1 in) |
| 1988 | 20.3 mm (0.8 in) |
| 1989 | 22.9 mm (0.9 in) |
| 1990 | 51.8 mm (2.0 in) |
| 1991 | 54.9 mm (2.2 in) |
| 1992 | 24.9 mm (1.0 in) |
| 1993 | 50.8 mm (2.0 in) |
| 1994 | 26.7 mm (1.1 in) |
| 1995 | 39.6 mm (1.6 in) |
| 1996 | 36.3 mm (1.4 in) |
| 1997 | 27.9 mm (1.1 in) |
| 1998 | 27.2 mm (1.1 in) |
| 1999 | 36.1 mm (1.4 in) |
| 2000 | 47.0 mm (1.9 in) |
| 2001 | 41.9 mm (1.6 in) |
| 2002 | 21.1 mm (0.8 in) |
| 2003 | 33.8 mm (1.3 in) |
| 2004 | 45.7 mm (1.8 in) |
| 2005 | 40.4 mm (1.6 in) |
| 2006 | 39.6 mm (1.6 in) |
| 2007 | 74.9 mm (2.9 in) |
| 2008 | 39.9 mm (1.6 in) |
| 2009 | 39.1 mm (1.5 in) |
| 2010 | 74.9 mm (2.9 in) |
| 2011 | 66.5 mm (2.6 in) |
| 2012 | 17.3 mm (0.7 in) |
| 2013 | 76.7 mm (3.0 in) |
| 2014 | 46.2 mm (1.8 in) |
| 2015 | 49.8 mm (2.0 in) |
| 2016 | 46.0 mm (1.8 in) |
| 2017 | 40.6 mm (1.6 in) |
| 2018 | 37.1 mm (1.5 in) |
| 2019 | 33.0 mm (1.3 in) |
| 2020 | 20.1 mm (0.8 in) |
| 2021 | 29.5 mm (1.2 in) |
| 2022 | 47.5 mm (1.9 in) |
| 2023 | 61.2 mm (2.4 in) |
| 2024 | 38.9 mm (1.5 in) |
Wettest five days (Rx5day)
| Year | Wettest five days (Rx5day) |
|---|---|
| 1965 | 3.0 mm (0.12 in) |
| 1966 | 28.9 mm (1.1 in) |
| 1967 | 123.2 mm (4.9 in) |
| 1968 | 55.3 mm (2.2 in) |
| 1969 | 98.8 mm (3.9 in) |
| 1970 | 67.0 mm (2.6 in) |
| 1971 | 83.5 mm (3.3 in) |
| 1972 | 29.6 mm (1.2 in) |
| 1973 | 67.0 mm (2.6 in) |
| 1974 | 67.5 mm (2.7 in) |
| 1975 | 90.9 mm (3.6 in) |
| 1976 | 48.7 mm (1.9 in) |
| 1977 | 41.5 mm (1.6 in) |
| 1978 | 142.5 mm (5.6 in) |
| 1979 | 41.2 mm (1.6 in) |
| 1980 | 72.4 mm (2.9 in) |
| 1981 | 42.4 mm (1.7 in) |
| 1982 | 61.0 mm (2.4 in) |
| 1983 | 32.8 mm (1.3 in) |
| 1984 | 101.3 mm (4.0 in) |
| 1985 | 40.9 mm (1.6 in) |
| 1986 | 70.0 mm (2.8 in) |
| 1987 | 40.2 mm (1.6 in) |
| 1988 | 33.8 mm (1.3 in) |
| 1989 | 44.5 mm (1.8 in) |
| 1990 | 82.6 mm (3.3 in) |
| 1991 | 90.8 mm (3.6 in) |
| 1992 | 30.3 mm (1.2 in) |
| 1993 | 90.2 mm (3.6 in) |
| 1994 | 39.5 mm (1.6 in) |
| 1995 | 74.4 mm (2.9 in) |
| 1996 | 59.7 mm (2.4 in) |
| 1997 | 57.6 mm (2.3 in) |
| 1998 | 52.3 mm (2.1 in) |
| 1999 | 54.4 mm (2.1 in) |
| 2000 | 50.0 mm (2.0 in) |
| 2001 | 43.5 mm (1.7 in) |
| 2002 | 25.1 mm (1.0 in) |
| 2003 | 49.9 mm (2.0 in) |
| 2004 | 49.0 mm (1.9 in) |
| 2005 | 82.8 mm (3.3 in) |
| 2006 | 64.1 mm (2.5 in) |
| 2007 | 103.9 mm (4.1 in) |
| 2008 | 101.4 mm (4.0 in) |
| 2009 | 49.0 mm (1.9 in) |
| 2010 | 97.5 mm (3.8 in) |
| 2011 | 134.6 mm (5.3 in) |
| 2012 | 29.3 mm (1.2 in) |
| 2013 | 139.8 mm (5.5 in) |
| 2014 | 80.1 mm (3.2 in) |
| 2015 | 53.6 mm (2.1 in) |
| 2016 | 53.9 mm (2.1 in) |
| 2017 | 48.2 mm (1.9 in) |
| 2018 | 45.5 mm (1.8 in) |
| 2019 | 58.5 mm (2.3 in) |
| 2020 | 44.7 mm (1.8 in) |
| 2021 | 76.2 mm (3.0 in) |
| 2022 | 49.1 mm (1.9 in) |
| 2023 | 74.4 mm (2.9 in) |
| 2024 | 72.4 mm (2.9 in) |
Longest dry spell (CDD)
| Year | Longest dry spell (CDD) |
|---|---|
| 1965 | 41 days |
| 1966 | 19 days |
| 1967 | 34 days |
| 1968 | 30 days |
| 1969 | 44 days |
| 1970 | 29 days |
| 1971 | 35 days |
| 1972 | 38 days |
| 1973 | 30 days |
| 1974 | 35 days |
| 1975 | 33 days |
| 1976 | 43 days |
| 1977 | 29 days |
| 1978 | 51 days |
| 1979 | 26 days |
| 1980 | 44 days |
| 1981 | 46 days |
| 1982 | 23 days |
| 1983 | 30 days |
| 1984 | 50 days |
| 1985 | 44 days |
| 1986 | 32 days |
| 1987 | 38 days |
| 1988 | 40 days |
| 1989 | 20 days |
| 1990 | 31 days |
| 1991 | 32 days |
| 1992 | 64 days |
| 1993 | 41 days |
| 1994 | 44 days |
| 1995 | 28 days |
| 1996 | 28 days |
| 1997 | 50 days |
| 1998 | 55 days |
| 1999 | 46 days |
| 2000 | 55 days |
| 2001 | 68 days |
| 2002 | 51 days |
| 2003 | 45 days |
| 2004 | 46 days |
| 2005 | 36 days |
| 2006 | 47 days |
| 2007 | 44 days |
| 2008 | 28 days |
| 2009 | 43 days |
| 2010 | 43 days |
| 2011 | 22 days |
| 2012 | 45 days |
| 2013 | 28 days |
| 2014 | 28 days |
| 2015 | 27 days |
| 2016 | 24 days |
| 2017 | 26 days |
| 2018 | 28 days |
| 2019 | 19 days |
| 2020 | 37 days |
| 2021 | 32 days |
| 2022 | 19 days |
| 2023 | 28 days |
| 2024 | 40 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
46 years with a frostAcross 46 years with a frost, the median last spring frost at Sonnette 7 SW falls on 29 May and the median first autumn frost on 12 September, which leaves a median of 109 days between them.
Fitted over all years, the growing season changes by +2.7 days per decade at this station.
| Measure | Median, all years | Earliest period | Recent period (1986 to 2023) | Recent against earliest | Fitted trend |
|---|---|---|---|---|---|
| Last spring frost | 29 May | n/a | 29 May | n/a | -1.1 days per decade |
| First autumn frost | 12 September | n/a | 13 September | n/a | +1.6 days per decade |
| Growing days | 109 days | n/a | 110 days | n/a | +2.7 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
49 years, 1966 to 2023A day with at least 39.3 mm (1.5 in) of rain is expected about once in 2 years. A day with at least 78.8 mm (3.1 in) of rain is expected about once in 100 years.
| Expected about once in | A day with at least | Note |
|---|---|---|
| 2 years | 39.3 mm (1.5 in) | |
| 5 years | 52.7 mm (2.1 in) | |
| 10 years | 60.3 mm (2.4 in) | |
| 25 years | 68.6 mm (2.7 in) | |
| 50 years | 74.0 mm (2.9 in) | Longer than the 49 years of record |
| 100 years | 78.8 mm (3.1 in) | Longer than the 49 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, 49 years of values from 1966 to 2023.
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: 74.9 mm (2.9 in) in 2007; 74.9 mm (2.9 in) in 2010; 65.5 mm (2.6 in) in 1980.
Station Changes
2 suspected2 changes were suspected in the annual mean temperature of Sonnette 7 SW, at 2003 and 2016. Each is measured against neighbouring stations.
- Relative to 5 neighbouring stations, the station's annual mean temperature from 2003 ran 0.4 C (0.7 F) lower than in the years before (likely change).
- Relative to 5 neighbouring stations, the station's annual mean temperature from 2016 ran 0.7 C (1.2 F) higher than in the years before (possible change).
| Year | Shift (C) | Shift (F) | Strength | Neighbours |
|---|---|---|---|---|
| 2003 | -0.4 | -0.7 | likely | 5 |
| 2016 | +0.7 | +1.2 | possible | 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
2006 to 2023 against 1961 to 1990Over 2006 to 2023, Sonnette 7 SW had a mean temperature of 6.7 C (44.1 F) and 434.5 mm (17.1 in) of rain a year. The 3 stations whose 1961 to 1990 climate was closest to that are Sundance (United States, 159 km away), Harrison (United States, 335 km away) and Dillinger (United States, 150 km away).
| Twin station | Country | Distance away | Mean temperature, 1961-1990 | Rain a year, 1961-1990 | Climate difference |
|---|---|---|---|---|---|
| Sundance | United States | 159 km (99 mi) | 6.6 C (43.9 F) | 450.7 mm (17.7 in) | 1.01 |
| Harrison | United States | 335 km (208 mi) | 6.7 C (44.1 F) | 426.9 mm (16.8 in) | 1.01 |
| Dillinger | United States | 150 km (93 mi) | 6.7 C (44.0 F) | 355.5 mm (14.0 in) | 1.12 |
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 2026-10-17 (17 October 2026). Records are computed by this site and are not official.
Data as of . Last revised (2025-12-31).