Sisseton Weather Records (USC00397742)
Record envelope, standing records and threshold days for Sisseton (USC00397742), South Dakota, United States, with 127 years of record.
Key Facts for Sisseton
- Sisseton (USC00397742) is a weather station in South Dakota, United States at 45.67 latitude and -97.04 longitude, 369 m (1,209 ft) above sea level.
- The station reports from 1900 to 2026, 127 years of record.
- 1,464 records set at Sisseton still stand.
- Records are tracked for tmax, tmin, prcp, snow, snwd: an element needs 30 years of data to be eligible.
- Sisseton tied a daily record high minimum temperature of 15.0 C (59.0 F) on 6 October 2026 (provisional).
Provisional Records
Records set in the last 60 days are provisional until they clear the revision window.
About the Station
- Location: South Dakota, United States, 45.67 latitude, -97.04 longitude.
- Elevation: 369 m (1,209 ft).
- Period of record: 1900 to 2026, 127 years.
- Eligible elements: tmax, tmin, prcp, snow, snwd.
Daily Record Envelope and 2026
8 days at or beyond a record| Month | Highest record high | Lowest record low | 2026 highest maximum | 2026 lowest minimum |
|---|---|---|---|---|
| Jan | 18.3 C (64.9 F) | -38.3 C (-36.9 F) | 10.6 C (51.1 F) | -28.3 C (-18.9 F) |
| Feb | 20.0 C (68.0 F) | -36.1 C (-33.0 F) | 15.6 C (60.1 F) | -19.4 C (-2.9 F) |
| Mar | 28.3 C (82.9 F) | -33.9 C (-29.0 F) | 22.2 C (72.0 F) | -18.3 C (-0.9 F) |
| Apr | 37.2 C (99.0 F) | -19.4 C (-2.9 F) | 32.2 C (90.0 F) | -11.1 C (12.0 F) |
| May | 45.0 C (113.0 F) | -7.2 C (19.0 F) | 32.8 C (91.0 F) | -3.3 C (26.1 F) |
| Jun | 40.6 C (105.1 F) | -0.6 C (30.9 F) | 33.3 C (91.9 F) | 8.9 C (48.0 F) |
| Jul | 45.0 C (113.0 F) | 4.4 C (39.9 F) | 35.0 C (95.0 F) | 11.7 C (53.1 F) |
| Aug | 42.2 C (108.0 F) | 1.1 C (34.0 F) | 30.6 C (87.1 F) | 10.0 C (50.0 F) |
| Sep | 38.9 C (102.0 F) | -5.6 C (21.9 F) | 30.0 C (86.0 F) | 7.2 C (45.0 F) |
| Oct | 35.0 C (95.0 F) | -15.6 C (3.9 F) | 26.7 C (80.1 F) | 6.7 C (44.1 F) |
| Nov | 26.1 C (79.0 F) | -27.8 C (-18.0 F) | n/a | n/a |
| Dec | 21.1 C (70.0 F) | -34.4 C (-29.9 F) | n/a | n/a |
Which Years Hold Standing Records
1,464 standing records| Year set | Standing records |
|---|---|
| 1900 | 10 |
| 1901 | 15 |
| 1902 | 22 |
| 1903 | 25 |
| 1904 | 22 |
| 1905 | 11 |
| 1912 | 7 |
| 1913 | 6 |
| 1914 | 2 |
| 1931 | 5 |
| 1932 | 21 |
| 1933 | 24 |
| 1934 | 42 |
| 1935 | 26 |
| 1936 | 51 |
| 1937 | 30 |
| 1938 | 7 |
| 1939 | 31 |
| 1940 | 12 |
| 1941 | 16 |
| 1942 | 20 |
| 1943 | 8 |
| 1944 | 14 |
| 1945 | 15 |
| 1946 | 17 |
| 1947 | 22 |
| 1948 | 16 |
| 1949 | 12 |
| 1950 | 9 |
| 1951 | 12 |
| 1952 | 20 |
| 1953 | 18 |
| 1954 | 9 |
| 1955 | 16 |
| 1956 | 11 |
| 1957 | 6 |
| 1958 | 16 |
| 1959 | 18 |
| 1960 | 10 |
| 1961 | 7 |
| 1962 | 15 |
| 1963 | 21 |
| 1964 | 16 |
| 1965 | 8 |
| 1966 | 11 |
| 1967 | 9 |
| 1968 | 15 |
| 1969 | 10 |
| 1970 | 5 |
| 1971 | 6 |
| 1972 | 15 |
| 1973 | 9 |
| 1974 | 13 |
| 1975 | 9 |
| 1976 | 35 |
| 1977 | 19 |
| 1978 | 14 |
| 1979 | 14 |
| 1980 | 9 |
| 1981 | 14 |
| 1982 | 5 |
| 1983 | 19 |
| 1984 | 12 |
| 1985 | 18 |
| 1986 | 10 |
| 1987 | 22 |
| 1988 | 18 |
| 1989 | 13 |
| 1990 | 16 |
| 1991 | 20 |
| 1992 | 18 |
| 1993 | 3 |
| 1994 | 14 |
| 1995 | 7 |
| 1996 | 21 |
| 1997 | 12 |
| 1998 | 10 |
| 1999 | 5 |
| 2000 | 15 |
| 2001 | 12 |
| 2002 | 11 |
| 2003 | 13 |
| 2004 | 9 |
| 2005 | 9 |
| 2006 | 7 |
| 2007 | 4 |
| 2008 | 6 |
| 2009 | 12 |
| 2010 | 9 |
| 2011 | 4 |
| 2012 | 23 |
| 2013 | 11 |
| 2014 | 14 |
| 2015 | 12 |
| 2016 | 8 |
| 2017 | 12 |
| 2018 | 10 |
| 2019 | 14 |
| 2020 | 17 |
| 2021 | 12 |
| 2022 | 9 |
| 2023 | 8 |
| 2024 | 9 |
| 2025 | 16 |
| 2026 | 7 |
All-Time Record Progression
4 new records| Date | Kind | Detail |
|---|---|---|
| 1986-06-26 | Record high minimum temperature | Record high minimum temperature 29.4 C (84.9 F) |
| 1997-01-04 | Record daily snowfall | Record daily snowfall 61.5 cm (24.2 in) |
| 2011-01-10 | Record snow depth | Record snow depth 83.8 cm (33.0 in) |
| 2011-01-11 | Record snow depth | Record snow depth 88.9 cm (35.0 in) |
Wettest Day of Each Month
Aug: 146.1 mm (5.8 in)| Month | Record daily precipitation (mm) | Date |
|---|---|---|
| Jan | 36.3 mm (1.4 in) | 9 January 1939 |
| Feb | 24.9 mm (1.0 in) | 27 February 1958 |
| Mar | 67.3 mm (2.6 in) | 26 March 1942 |
| Apr | 93.0 mm (3.7 in) | 13 April 1912 |
| May | 139.7 mm (5.5 in) | 27 May 1954 |
| Jun | 130.0 mm (5.1 in) | 10 June 1939 |
| Jul | 127.0 mm (5.0 in) | 5 July 1901 |
| Aug | 146.1 mm (5.8 in) | 14 August 1905 |
| Sep | 98.8 mm (3.9 in) | 11 September 1901 |
| Oct | 83.8 mm (3.3 in) | 19 October 1993 |
| Nov | 48.3 mm (1.9 in) | 28 November 2005 |
| Dec | 42.7 mm (1.7 in) | 26 December 2023 |
Period of Record Coverage
1900 to 2026| Year | Days with data | Share of year | Complete |
|---|---|---|---|
| 1900 | 319 | 87% | No |
| 1901 | 326 | 89% | No |
| 1902 | 353 | 97% | Yes |
| 1903 | 355 | 97% | Yes |
| 1904 | 359 | 98% | Yes |
| 1905 | 174 | 48% | No |
| 1912 | 236 | 64% | No |
| 1913 | 170 | 47% | No |
| 1914 | 49 | 13% | No |
| 1931 | 91 | 25% | No |
| 1932 | 324 | 89% | No |
| 1933 | 363 | 99% | Yes |
| 1934 | 344 | 94% | Yes |
| 1935 | 361 | 99% | Yes |
| 1936 | 361 | 99% | Yes |
| 1937 | 356 | 98% | Yes |
| 1938 | 357 | 98% | Yes |
| 1939 | 362 | 99% | Yes |
| 1940 | 362 | 99% | Yes |
| 1941 | 363 | 99% | Yes |
| 1942 | 363 | 99% | Yes |
| 1943 | 359 | 98% | Yes |
| 1944 | 362 | 99% | Yes |
| 1945 | 363 | 99% | Yes |
| 1946 | 359 | 98% | Yes |
| 1947 | 359 | 98% | Yes |
| 1948 | 362 | 99% | Yes |
| 1949 | 362 | 99% | Yes |
| 1950 | 193 | 53% | No |
| 1951 | 312 | 85% | No |
| 1952 | 359 | 98% | Yes |
| 1953 | 364 | 100% | Yes |
| 1954 | 365 | 100% | Yes |
| 1955 | 359 | 98% | Yes |
| 1956 | 289 | 79% | No |
| 1957 | 365 | 100% | Yes |
| 1958 | 364 | 100% | Yes |
| 1959 | 364 | 100% | Yes |
| 1960 | 363 | 99% | Yes |
| 1961 | 364 | 100% | Yes |
| 1962 | 358 | 98% | Yes |
| 1963 | 364 | 100% | Yes |
| 1964 | 363 | 99% | Yes |
| 1965 | 364 | 100% | Yes |
| 1966 | 364 | 100% | Yes |
| 1967 | 360 | 99% | Yes |
| 1968 | 364 | 99% | Yes |
| 1969 | 360 | 99% | Yes |
| 1970 | 364 | 100% | Yes |
| 1971 | 364 | 100% | Yes |
| 1972 | 364 | 99% | Yes |
| 1973 | 363 | 99% | Yes |
| 1974 | 360 | 99% | Yes |
| 1975 | 359 | 98% | Yes |
| 1976 | 364 | 99% | Yes |
| 1977 | 361 | 99% | Yes |
| 1978 | 359 | 98% | Yes |
| 1979 | 363 | 99% | Yes |
| 1980 | 331 | 90% | Yes |
| 1981 | 362 | 99% | Yes |
| 1982 | 355 | 97% | Yes |
| 1983 | 362 | 99% | Yes |
| 1984 | 356 | 97% | Yes |
| 1985 | 358 | 98% | Yes |
| 1986 | 358 | 98% | Yes |
| 1987 | 356 | 98% | Yes |
| 1988 | 363 | 99% | Yes |
| 1989 | 357 | 98% | Yes |
| 1990 | 362 | 99% | Yes |
| 1991 | 326 | 89% | No |
| 1992 | 356 | 97% | Yes |
| 1993 | 353 | 97% | Yes |
| 1994 | 357 | 98% | Yes |
| 1995 | 346 | 95% | Yes |
| 1996 | 349 | 95% | Yes |
| 1997 | 349 | 96% | Yes |
| 1998 | 362 | 99% | Yes |
| 1999 | 352 | 96% | Yes |
| 2000 | 332 | 91% | Yes |
| 2001 | 358 | 98% | Yes |
| 2002 | 344 | 94% | Yes |
| 2003 | 361 | 99% | Yes |
| 2004 | 357 | 98% | Yes |
| 2005 | 361 | 99% | Yes |
| 2006 | 362 | 99% | Yes |
| 2007 | 364 | 100% | Yes |
| 2008 | 336 | 92% | Yes |
| 2009 | 364 | 100% | Yes |
| 2010 | 364 | 100% | Yes |
| 2011 | 365 | 100% | Yes |
| 2012 | 365 | 100% | Yes |
| 2013 | 365 | 100% | Yes |
| 2014 | 364 | 100% | Yes |
| 2015 | 365 | 100% | Yes |
| 2016 | 366 | 100% | Yes |
| 2017 | 365 | 100% | Yes |
| 2018 | 365 | 100% | Yes |
| 2019 | 365 | 100% | Yes |
| 2020 | 366 | 100% | Yes |
| 2021 | 365 | 100% | Yes |
| 2022 | 365 | 100% | Yes |
| 2023 | 358 | 98% | Yes |
| 2024 | 366 | 100% | Yes |
| 2025 | 365 | 100% | Yes |
| 2026 | 264 | 72% | No |
Latest Records
20| Date | Station | Record | Value | Beat old record by | Old record stood | Significance |
|---|---|---|---|---|---|---|
| 6 October 2026 | Sisseton, US | daily high min (Tie, Provisional) | 15.0 C (59.0 F) | tie | 19 years | 3 of 100 (Routine) |
| 31 July 2026 | Sisseton, US | daily rain | 73.9 mm (2.9 in) | 17.5 mm (0.7 in) | 17 years | 27 of 100 (Routine) |
| 30 July 2026 | Sisseton, US | daily rain | 73.4 mm (2.9 in) | 22.6 mm (0.9 in) | 123 years | 56 of 100 (Notable) |
| 27 May 2026 | Sisseton, US | daily high min | 20.0 C (68.0 F) | 1.1 C (2.0 F) | 56 years | 29 of 100 (Routine) |
| 20 May 2026 | Sisseton, US | daily low min (Tie) | 0.0 C (32.0 F) | tie | 56 years | 6 of 100 (Routine) |
| 7 May 2026 | Sisseton, US | daily low min (Tie) | -3.3 C (26.1 F) | tie | 49 years | 6 of 100 (Routine) |
| 16 April 2026 | Sisseton, US | daily high max (Tie) | 30.0 C (86.0 F) | tie | 68 years | 7 of 100 (Routine) |
| 21 March 2026 | Sisseton, US | daily high max | 22.2 C (72.0 F) | 1.1 C (2.0 F) | 80 years | 35 of 100 (Notable) |
| 8 March 2026 | Sisseton, US | daily high min | 5.0 C (41.0 F) | 0.6 C (1.1 F) | 57 years | 27 of 100 (Routine) |
| 15 February 2026 | Sisseton, US | daily high max | 15.6 C (60.1 F) | 5.0 C (9.0 F) | 44 years | 29 of 100 (Routine) |
| 14 February 2026 | Sisseton, US | daily high max | 12.2 C (54.0 F) | 0.5 C (0.9 F) | 27 years | 18 of 100 (Routine) |
| 13 February 2026 | Sisseton, US | daily high max | 13.3 C (55.9 F) | 1.1 C (2.0 F) | 43 years | 23 of 100 (Routine) |
| 15 January 2026 | Sisseton, US | daily high max | 7.2 C (45.0 F) | 0.5 C (0.9 F) | 124 years | 40 of 100 (Notable) |
| 25 November 2025 | Sisseton, US | daily rain | 19.1 mm (0.8 in) | 1.8 mm (0.07 in) | 91 years | 20 of 100 (Routine) |
| 25 November 2025 | Sisseton, US | daily snowfall | 14.2 cm (5.6 in) | 1.5 cm (0.6 in) | 44 years | 25 of 100 (Routine) |
| 23 November 2025 | Sisseton, US | daily high max | 16.1 C (61.0 F) | 1.1 C (2.0 F) | 8 years | 13 of 100 (Routine) |
| 4 October 2025 | Sisseton, US | monthly high min | 21.1 C (70.0 F) | 1.1 C (2.0 F) | 40 years | 34 of 100 (Routine) |
| 3 October 2025 | Sisseton, US | daily high max (Tie) | 32.2 C (90.0 F) | tie | 87 years | 9 of 100 (Routine) |
| 29 September 2025 | Sisseton, US | daily high min | 16.1 C (61.0 F) | 1.1 C (2.0 F) | 18 years | 17 of 100 (Routine) |
| 29 September 2025 | Sisseton, US | daily high max (Tie) | 33.3 C (91.9 F) | tie | 92 years | 9 of 100 (Routine) |
Climate Trend
88 complete years, 1901 to 2025| Year | Annual mean temperature | Difference from the station mean |
|---|---|---|
| 1901 | 6.2 C | -0.52 C |
| 1902 | 5.7 C | -1.01 C |
| 1903 | 4.8 C | -1.92 C |
| 1904 | 4.5 C | -2.29 C |
| 1935 | 6.0 C | -0.74 C |
| 1936 | 5.2 C | -1.55 C |
| 1937 | 5.2 C | -1.53 C |
| 1938 | 7.3 C | +0.56 C |
| 1939 | 7.8 C | +1.02 C |
| 1940 | 6.6 C | -0.19 C |
| 1941 | 7.7 C | +0.97 C |
| 1942 | 7.0 C | +0.20 C |
| 1943 | 6.3 C | -0.49 C |
| 1944 | 7.1 C | +0.35 C |
| 1945 | 5.9 C | -0.89 C |
| 1946 | 6.9 C | +0.10 C |
| 1947 | 6.3 C | -0.42 C |
| 1948 | 6.4 C | -0.35 C |
| 1949 | 7.1 C | +0.32 C |
| 1952 | 6.9 C | +0.11 C |
| 1953 | 7.3 C | +0.56 C |
| 1954 | 7.0 C | +0.27 C |
| 1955 | 6.6 C | -0.15 C |
| 1957 | 6.7 C | -0.05 C |
| 1958 | 7.1 C | +0.33 C |
| 1959 | 7.2 C | +0.40 C |
| 1960 | 6.6 C | -0.15 C |
| 1961 | 7.4 C | +0.66 C |
| 1962 | 6.8 C | +0.08 C |
| 1963 | 7.8 C | +1.07 C |
| 1964 | 7.2 C | +0.40 C |
| 1965 | 5.8 C | -0.97 C |
| 1966 | 5.8 C | -0.95 C |
| 1967 | 6.5 C | -0.21 C |
| 1968 | 6.9 C | +0.11 C |
| 1969 | 6.2 C | -0.55 C |
| 1970 | 6.5 C | -0.24 C |
| 1971 | 6.9 C | +0.10 C |
| 1972 | 5.9 C | -0.83 C |
| 1973 | 8.3 C | +1.56 C |
| 1974 | 7.0 C | +0.29 C |
| 1975 | 6.6 C | -0.14 C |
| 1976 | 7.9 C | +1.18 C |
| 1977 | 6.9 C | +0.12 C |
| 1978 | 5.7 C | -1.08 C |
| 1979 | 4.8 C | -1.92 C |
| 1981 | 8.0 C | +1.25 C |
| 1982 | 6.1 C | -0.70 C |
| 1983 | 7.4 C | +0.61 C |
| 1984 | 7.4 C | +0.64 C |
| 1985 | 6.0 C | -0.79 C |
| 1986 | 7.3 C | +0.53 C |
| 1987 | 9.2 C | +2.46 C |
| 1988 | 7.4 C | +0.66 C |
| 1989 | 5.9 C | -0.87 C |
| 1990 | 7.9 C | +1.15 C |
| 1992 | 6.7 C | -0.01 C |
| 1993 | 5.4 C | -1.31 C |
| 1994 | 6.6 C | -0.14 C |
| 1995 | 5.9 C | -0.82 C |
| 1996 | 4.3 C | -2.50 C |
| 1997 | 6.4 C | -0.40 C |
| 1998 | 8.2 C | +1.49 C |
| 1999 | 8.0 C | +1.25 C |
| 2001 | 7.6 C | +0.84 C |
| 2002 | 7.3 C | +0.54 C |
| 2003 | 7.0 C | +0.23 C |
| 2004 | 6.8 C | +0.04 C |
| 2005 | 7.6 C | +0.81 C |
| 2006 | 8.2 C | +1.48 C |
| 2007 | 7.1 C | +0.35 C |
| 2009 | 5.5 C | -1.25 C |
| 2010 | 6.8 C | 0.00 C |
| 2011 | 6.6 C | -0.15 C |
| 2012 | 8.6 C | +1.83 C |
| 2013 | 5.1 C | -1.69 C |
| 2014 | 5.5 C | -1.27 C |
| 2015 | 8.0 C | +1.23 C |
| 2016 | 8.5 C | +1.73 C |
| 2017 | 7.4 C | +0.65 C |
| 2018 | 6.2 C | -0.60 C |
| 2019 | 5.0 C | -1.73 C |
| 2020 | 7.3 C | +0.54 C |
| 2021 | 8.2 C | +1.45 C |
| 2022 | 5.3 C | -1.42 C |
| 2023 | 6.9 C | +0.11 C |
| 2024 | 8.4 C | +1.67 C |
| 2025 | 7.4 C | +0.67 C |
The annual mean temperature here has risen by 0.09 C (0.02 to 0.15) per decade over 1901 to 2025. In Fahrenheit: 0.15 F (0.03 to 0.28) per decade. The slope is a straight line fitted to 88 complete years; the brackets give its 95 percent interval.
| Measure | Per decade (C) | Per decade (F) | Period | Complete years | Reading |
|---|---|---|---|---|---|
| Annual mean temperature | 0.09 C (0.02 to 0.15) per decade | 0.15 F (0.03 to 0.28) per decade | 1901 to 2025 | 88 | Rise |
| Mean daily maximum | 0.01 C (-0.07 to 0.09) per decade | 0.02 F (-0.12 to 0.17) per decade | 1901 to 2025 | 88 | Not clearly different from zero |
| Mean daily minimum | 0.2 C (0.1 to 0.2) per decade | 0.3 F (0.2 to 0.4) per decade | 1901 to 2025 | 88 | 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
1900 to 2026| Measure | Record | Year of the record | Median year | Years with a value |
|---|---|---|---|---|
| Hottest day (TXx) | 45.0 C (113.0 F) | 1934 | 36.7 C (98.1 F) | 105 |
| Coldest night (TNn) | -38.3 C (-36.9 F) | 1936 | -30.0 C (-22.0 F) | 105 |
| Wettest day (Rx1day) | 146.1 mm (5.8 in) | 1905 | 51.8 mm (2.0 in) | 105 |
| Wettest five days (Rx5day) | 211.3 mm (8.3 in) | 1954 | 82.6 mm (3.3 in) | 105 |
| Longest dry spell (CDD) | 70 days | 1980 | 31 days | 105 |
Hottest day (TXx)
| Year | Hottest day (TXx) |
|---|---|
| 1900 | 37.2 C (99.0 F) |
| 1901 | 37.2 C (99.0 F) |
| 1902 | 36.7 C (98.1 F) |
| 1903 | 31.7 C (89.1 F) |
| 1904 | 31.7 C (89.1 F) |
| 1905 | 35.0 C (95.0 F) |
| 1912 | 36.7 C (98.1 F) |
| 1913 | 35.6 C (96.1 F) |
| 1914 | 31.1 C (88.0 F) |
| 1931 | 30.0 C (86.0 F) |
| 1932 | 41.1 C (106.0 F) |
| 1933 | 40.6 C (105.1 F) |
| 1934 | 45.0 C (113.0 F) |
| 1935 | 38.9 C (102.0 F) |
| 1936 | 45.0 C (113.0 F) |
| 1937 | 41.1 C (106.0 F) |
| 1938 | 40.0 C (104.0 F) |
| 1939 | 37.8 C (100.0 F) |
| 1940 | 40.6 C (105.1 F) |
| 1941 | 40.0 C (104.0 F) |
| 1942 | 33.3 C (91.9 F) |
| 1943 | 36.1 C (97.0 F) |
| 1944 | 36.1 C (97.0 F) |
| 1945 | 35.0 C (95.0 F) |
| 1946 | 33.9 C (93.0 F) |
| 1947 | 42.2 C (108.0 F) |
| 1948 | 36.7 C (98.1 F) |
| 1949 | 40.6 C (105.1 F) |
| 1950 | 33.9 C (93.0 F) |
| 1951 | 34.4 C (93.9 F) |
| 1952 | 37.8 C (100.0 F) |
| 1953 | 35.0 C (95.0 F) |
| 1954 | 37.2 C (99.0 F) |
| 1955 | 38.3 C (100.9 F) |
| 1956 | 35.6 C (96.1 F) |
| 1957 | 36.7 C (98.1 F) |
| 1958 | 38.3 C (100.9 F) |
| 1959 | 40.0 C (104.0 F) |
| 1960 | 38.3 C (100.9 F) |
| 1961 | 37.2 C (99.0 F) |
| 1962 | 37.2 C (99.0 F) |
| 1963 | 37.8 C (100.0 F) |
| 1964 | 37.8 C (100.0 F) |
| 1965 | 40.0 C (104.0 F) |
| 1966 | 42.8 C (109.0 F) |
| 1967 | 35.6 C (96.1 F) |
| 1968 | 37.2 C (99.0 F) |
| 1969 | 36.7 C (98.1 F) |
| 1970 | 37.2 C (99.0 F) |
| 1971 | 37.8 C (100.0 F) |
| 1972 | 35.6 C (96.1 F) |
| 1973 | 41.7 C (107.1 F) |
| 1974 | 40.0 C (104.0 F) |
| 1975 | 40.6 C (105.1 F) |
| 1976 | 40.6 C (105.1 F) |
| 1977 | 38.9 C (102.0 F) |
| 1978 | 37.2 C (99.0 F) |
| 1979 | 39.4 C (102.9 F) |
| 1980 | 38.3 C (100.9 F) |
| 1981 | 36.1 C (97.0 F) |
| 1982 | 37.8 C (100.0 F) |
| 1983 | 38.9 C (102.0 F) |
| 1984 | 37.2 C (99.0 F) |
| 1985 | 38.3 C (100.9 F) |
| 1986 | 34.4 C (93.9 F) |
| 1987 | 40.6 C (105.1 F) |
| 1988 | 40.0 C (104.0 F) |
| 1989 | 38.3 C (100.9 F) |
| 1990 | 35.0 C (95.0 F) |
| 1991 | 37.2 C (99.0 F) |
| 1992 | 33.9 C (93.0 F) |
| 1993 | 33.9 C (93.0 F) |
| 1994 | 33.3 C (91.9 F) |
| 1995 | 35.0 C (95.0 F) |
| 1996 | 33.9 C (93.0 F) |
| 1997 | 35.0 C (95.0 F) |
| 1998 | 35.0 C (95.0 F) |
| 1999 | 37.8 C (100.0 F) |
| 2000 | 35.0 C (95.0 F) |
| 2001 | 36.7 C (98.1 F) |
| 2002 | 36.7 C (98.1 F) |
| 2003 | 37.8 C (100.0 F) |
| 2004 | 34.4 C (93.9 F) |
| 2005 | 36.1 C (97.0 F) |
| 2006 | 41.1 C (106.0 F) |
| 2007 | 37.8 C (100.0 F) |
| 2008 | 34.4 C (93.9 F) |
| 2009 | 35.0 C (95.0 F) |
| 2010 | 36.7 C (98.1 F) |
| 2011 | 36.7 C (98.1 F) |
| 2012 | 37.2 C (99.0 F) |
| 2013 | 35.6 C (96.1 F) |
| 2014 | 32.8 C (91.0 F) |
| 2015 | 36.1 C (97.0 F) |
| 2016 | 35.6 C (96.1 F) |
| 2017 | 37.8 C (100.0 F) |
| 2018 | 35.0 C (95.0 F) |
| 2019 | 32.8 C (91.0 F) |
| 2020 | 36.1 C (97.0 F) |
| 2021 | 37.2 C (99.0 F) |
| 2022 | 36.7 C (98.1 F) |
| 2023 | 36.7 C (98.1 F) |
| 2024 | 34.4 C (93.9 F) |
| 2025 | 35.6 C (96.1 F) |
| 2026 | 35.0 C (95.0 F) |
Coldest night (TNn)
| Year | Coldest night (TNn) |
|---|---|
| 1900 | -24.4 C (-11.9 F) |
| 1901 | -33.9 C (-29.0 F) |
| 1902 | -32.2 C (-26.0 F) |
| 1903 | -34.4 C (-29.9 F) |
| 1904 | -37.8 C (-36.0 F) |
| 1905 | -35.0 C (-31.0 F) |
| 1912 | -24.4 C (-11.9 F) |
| 1913 | -30.0 C (-22.0 F) |
| 1914 | -16.1 C (3.0 F) |
| 1931 | -18.9 C (-2.0 F) |
| 1932 | -28.9 C (-20.0 F) |
| 1933 | -34.4 C (-29.9 F) |
| 1934 | -30.0 C (-22.0 F) |
| 1935 | -33.3 C (-27.9 F) |
| 1936 | -38.3 C (-36.9 F) |
| 1937 | -32.8 C (-27.0 F) |
| 1938 | -29.4 C (-20.9 F) |
| 1939 | -34.4 C (-29.9 F) |
| 1940 | -31.7 C (-25.1 F) |
| 1941 | -28.9 C (-20.0 F) |
| 1942 | -30.0 C (-22.0 F) |
| 1943 | -32.8 C (-27.0 F) |
| 1944 | -27.2 C (-17.0 F) |
| 1945 | -28.3 C (-18.9 F) |
| 1946 | -28.9 C (-20.0 F) |
| 1947 | -28.3 C (-18.9 F) |
| 1948 | -34.4 C (-29.9 F) |
| 1949 | -31.7 C (-25.1 F) |
| 1950 | -32.8 C (-27.0 F) |
| 1951 | -36.7 C (-34.1 F) |
| 1952 | -33.9 C (-29.0 F) |
| 1953 | -28.9 C (-20.0 F) |
| 1954 | -33.9 C (-29.0 F) |
| 1955 | -32.8 C (-27.0 F) |
| 1956 | -30.6 C (-23.1 F) |
| 1957 | -30.0 C (-22.0 F) |
| 1958 | -31.7 C (-25.1 F) |
| 1959 | -29.4 C (-20.9 F) |
| 1960 | -29.4 C (-20.9 F) |
| 1961 | -32.2 C (-26.0 F) |
| 1962 | -33.9 C (-29.0 F) |
| 1963 | -31.1 C (-24.0 F) |
| 1964 | -27.8 C (-18.0 F) |
| 1965 | -31.1 C (-24.0 F) |
| 1966 | -33.9 C (-29.0 F) |
| 1967 | -32.8 C (-27.0 F) |
| 1968 | -32.2 C (-26.0 F) |
| 1969 | -30.0 C (-22.0 F) |
| 1970 | -35.0 C (-31.0 F) |
| 1971 | -30.0 C (-22.0 F) |
| 1972 | -33.9 C (-29.0 F) |
| 1973 | -30.0 C (-22.0 F) |
| 1974 | -30.6 C (-23.1 F) |
| 1975 | -27.8 C (-18.0 F) |
| 1976 | -30.6 C (-23.1 F) |
| 1977 | -36.1 C (-33.0 F) |
| 1978 | -30.0 C (-22.0 F) |
| 1979 | -32.2 C (-26.0 F) |
| 1980 | -30.0 C (-22.0 F) |
| 1981 | -29.4 C (-20.9 F) |
| 1982 | -33.3 C (-27.9 F) |
| 1983 | -34.4 C (-29.9 F) |
| 1984 | -31.1 C (-24.0 F) |
| 1985 | -33.9 C (-29.0 F) |
| 1986 | -31.1 C (-24.0 F) |
| 1987 | -30.0 C (-22.0 F) |
| 1988 | -33.3 C (-27.9 F) |
| 1989 | -32.8 C (-27.0 F) |
| 1990 | -32.2 C (-26.0 F) |
| 1991 | -27.2 C (-17.0 F) |
| 1992 | -26.7 C (-16.1 F) |
| 1993 | -27.8 C (-18.0 F) |
| 1994 | -36.1 C (-33.0 F) |
| 1995 | -26.1 C (-15.0 F) |
| 1996 | -35.0 C (-31.0 F) |
| 1997 | -28.9 C (-20.0 F) |
| 1998 | -27.2 C (-17.0 F) |
| 1999 | -29.4 C (-20.9 F) |
| 2000 | -26.7 C (-16.1 F) |
| 2001 | -28.3 C (-18.9 F) |
| 2002 | -23.3 C (-9.9 F) |
| 2003 | -28.3 C (-18.9 F) |
| 2004 | -30.6 C (-23.1 F) |
| 2005 | -29.4 C (-20.9 F) |
| 2006 | -26.7 C (-16.1 F) |
| 2007 | -27.8 C (-18.0 F) |
| 2008 | -30.0 C (-22.0 F) |
| 2009 | -33.3 C (-27.9 F) |
| 2010 | -35.6 C (-32.1 F) |
| 2011 | -31.1 C (-24.0 F) |
| 2012 | -25.6 C (-14.1 F) |
| 2013 | -30.6 C (-23.1 F) |
| 2014 | -30.0 C (-22.0 F) |
| 2015 | -26.7 C (-16.1 F) |
| 2016 | -29.4 C (-20.9 F) |
| 2017 | -30.0 C (-22.0 F) |
| 2018 | -28.3 C (-18.9 F) |
| 2019 | -35.0 C (-31.0 F) |
| 2020 | -28.3 C (-18.9 F) |
| 2021 | -30.6 C (-23.1 F) |
| 2022 | -31.7 C (-25.1 F) |
| 2023 | -28.3 C (-18.9 F) |
| 2024 | -26.7 C (-16.1 F) |
| 2025 | -28.9 C (-20.0 F) |
| 2026 | -28.3 C (-18.9 F) |
Wettest day (Rx1day)
| Year | Wettest day (Rx1day) |
|---|---|
| 1900 | 81.0 mm (3.2 in) |
| 1901 | 127.0 mm (5.0 in) |
| 1902 | 46.2 mm (1.8 in) |
| 1903 | 92.7 mm (3.6 in) |
| 1904 | 76.7 mm (3.0 in) |
| 1905 | 146.1 mm (5.8 in) |
| 1912 | 93.0 mm (3.7 in) |
| 1913 | 27.9 mm (1.1 in) |
| 1914 | 56.9 mm (2.2 in) |
| 1931 | 27.2 mm (1.1 in) |
| 1932 | 83.8 mm (3.3 in) |
| 1933 | 35.3 mm (1.4 in) |
| 1934 | 63.2 mm (2.5 in) |
| 1935 | 59.7 mm (2.4 in) |
| 1936 | 27.9 mm (1.1 in) |
| 1937 | 72.4 mm (2.9 in) |
| 1938 | 73.2 mm (2.9 in) |
| 1939 | 130.0 mm (5.1 in) |
| 1940 | 30.2 mm (1.2 in) |
| 1941 | 57.2 mm (2.3 in) |
| 1942 | 67.3 mm (2.6 in) |
| 1943 | 39.4 mm (1.6 in) |
| 1944 | 48.8 mm (1.9 in) |
| 1945 | 68.1 mm (2.7 in) |
| 1946 | 76.2 mm (3.0 in) |
| 1947 | 33.0 mm (1.3 in) |
| 1948 | 50.0 mm (2.0 in) |
| 1949 | 42.4 mm (1.7 in) |
| 1950 | 35.6 mm (1.4 in) |
| 1951 | 55.9 mm (2.2 in) |
| 1952 | 49.8 mm (2.0 in) |
| 1953 | 73.2 mm (2.9 in) |
| 1954 | 139.7 mm (5.5 in) |
| 1955 | 54.9 mm (2.2 in) |
| 1956 | 47.5 mm (1.9 in) |
| 1957 | 51.8 mm (2.0 in) |
| 1958 | 26.2 mm (1.0 in) |
| 1959 | 43.7 mm (1.7 in) |
| 1960 | 42.9 mm (1.7 in) |
| 1961 | 50.3 mm (2.0 in) |
| 1962 | 61.7 mm (2.4 in) |
| 1963 | 39.9 mm (1.6 in) |
| 1964 | 65.5 mm (2.6 in) |
| 1965 | 97.5 mm (3.8 in) |
| 1966 | 56.9 mm (2.2 in) |
| 1967 | 76.7 mm (3.0 in) |
| 1968 | 43.7 mm (1.7 in) |
| 1969 | 31.0 mm (1.2 in) |
| 1970 | 30.0 mm (1.2 in) |
| 1971 | 90.2 mm (3.6 in) |
| 1972 | 50.3 mm (2.0 in) |
| 1973 | 69.3 mm (2.7 in) |
| 1974 | 27.4 mm (1.1 in) |
| 1975 | 50.0 mm (2.0 in) |
| 1976 | 21.6 mm (0.9 in) |
| 1977 | 48.0 mm (1.9 in) |
| 1978 | 53.6 mm (2.1 in) |
| 1979 | 92.7 mm (3.6 in) |
| 1980 | 51.3 mm (2.0 in) |
| 1981 | 32.0 mm (1.3 in) |
| 1982 | 43.9 mm (1.7 in) |
| 1983 | 82.0 mm (3.2 in) |
| 1984 | 35.3 mm (1.4 in) |
| 1985 | 35.6 mm (1.4 in) |
| 1986 | 67.6 mm (2.7 in) |
| 1987 | 23.9 mm (0.9 in) |
| 1988 | 39.4 mm (1.6 in) |
| 1989 | 55.9 mm (2.2 in) |
| 1990 | 31.0 mm (1.2 in) |
| 1991 | 42.7 mm (1.7 in) |
| 1992 | 35.3 mm (1.4 in) |
| 1993 | 83.8 mm (3.3 in) |
| 1994 | 59.4 mm (2.3 in) |
| 1995 | 63.5 mm (2.5 in) |
| 1996 | 48.3 mm (1.9 in) |
| 1997 | 31.8 mm (1.3 in) |
| 1998 | 55.9 mm (2.2 in) |
| 1999 | 42.9 mm (1.7 in) |
| 2000 | 42.7 mm (1.7 in) |
| 2001 | 43.2 mm (1.7 in) |
| 2002 | 53.8 mm (2.1 in) |
| 2003 | 45.0 mm (1.8 in) |
| 2004 | 44.7 mm (1.8 in) |
| 2005 | 64.8 mm (2.6 in) |
| 2006 | 88.9 mm (3.5 in) |
| 2007 | 48.3 mm (1.9 in) |
| 2008 | 56.4 mm (2.2 in) |
| 2009 | 70.9 mm (2.8 in) |
| 2010 | 34.3 mm (1.4 in) |
| 2011 | 84.1 mm (3.3 in) |
| 2012 | 91.9 mm (3.6 in) |
| 2013 | 59.7 mm (2.4 in) |
| 2014 | 91.4 mm (3.6 in) |
| 2015 | 41.9 mm (1.6 in) |
| 2016 | 81.8 mm (3.2 in) |
| 2017 | 43.7 mm (1.7 in) |
| 2018 | 43.2 mm (1.7 in) |
| 2019 | 50.3 mm (2.0 in) |
| 2020 | 42.2 mm (1.7 in) |
| 2021 | 85.9 mm (3.4 in) |
| 2022 | 44.2 mm (1.7 in) |
| 2023 | 61.0 mm (2.4 in) |
| 2024 | 55.4 mm (2.2 in) |
| 2025 | 79.2 mm (3.1 in) |
| 2026 | 73.9 mm (2.9 in) |
Wettest five days (Rx5day)
| Year | Wettest five days (Rx5day) |
|---|---|
| 1900 | 110.3 mm (4.3 in) |
| 1901 | 150.1 mm (5.9 in) |
| 1902 | 68.1 mm (2.7 in) |
| 1903 | 157.0 mm (6.2 in) |
| 1904 | 85.1 mm (3.4 in) |
| 1905 | 118.6 mm (4.7 in) |
| 1912 | 109.8 mm (4.3 in) |
| 1913 | 39.3 mm (1.5 in) |
| 1914 | 1.0 mm (0.04 in) |
| 1931 | 38.9 mm (1.5 in) |
| 1932 | 83.8 mm (3.3 in) |
| 1933 | 39.9 mm (1.6 in) |
| 1934 | 63.2 mm (2.5 in) |
| 1935 | 77.0 mm (3.0 in) |
| 1936 | 38.6 mm (1.5 in) |
| 1937 | 91.2 mm (3.6 in) |
| 1938 | 85.4 mm (3.4 in) |
| 1939 | 130.0 mm (5.1 in) |
| 1940 | 46.5 mm (1.8 in) |
| 1941 | 76.5 mm (3.0 in) |
| 1942 | 99.1 mm (3.9 in) |
| 1943 | 66.5 mm (2.6 in) |
| 1944 | 84.9 mm (3.3 in) |
| 1945 | 99.4 mm (3.9 in) |
| 1946 | 86.6 mm (3.4 in) |
| 1947 | 53.0 mm (2.1 in) |
| 1948 | 116.6 mm (4.6 in) |
| 1949 | 76.7 mm (3.0 in) |
| 1950 | 48.8 mm (1.9 in) |
| 1951 | 119.6 mm (4.7 in) |
| 1952 | 58.7 mm (2.3 in) |
| 1953 | 83.1 mm (3.3 in) |
| 1954 | 211.3 mm (8.3 in) |
| 1955 | 75.2 mm (3.0 in) |
| 1956 | 83.8 mm (3.3 in) |
| 1957 | 80.8 mm (3.2 in) |
| 1958 | 44.6 mm (1.8 in) |
| 1959 | 89.2 mm (3.5 in) |
| 1960 | 72.1 mm (2.8 in) |
| 1961 | 55.4 mm (2.2 in) |
| 1962 | 105.0 mm (4.1 in) |
| 1963 | 75.8 mm (3.0 in) |
| 1964 | 118.6 mm (4.7 in) |
| 1965 | 156.4 mm (6.2 in) |
| 1966 | 68.9 mm (2.7 in) |
| 1967 | 76.7 mm (3.0 in) |
| 1968 | 70.2 mm (2.8 in) |
| 1969 | 37.6 mm (1.5 in) |
| 1970 | 72.9 mm (2.9 in) |
| 1971 | 90.2 mm (3.6 in) |
| 1972 | 88.7 mm (3.5 in) |
| 1973 | 83.8 mm (3.3 in) |
| 1974 | 50.7 mm (2.0 in) |
| 1975 | 84.1 mm (3.3 in) |
| 1976 | 31.4 mm (1.2 in) |
| 1977 | 74.9 mm (2.9 in) |
| 1978 | 113.3 mm (4.5 in) |
| 1979 | 159.0 mm (6.3 in) |
| 1980 | 65.8 mm (2.6 in) |
| 1981 | 59.2 mm (2.3 in) |
| 1982 | 74.2 mm (2.9 in) |
| 1983 | 82.8 mm (3.3 in) |
| 1984 | 87.9 mm (3.5 in) |
| 1985 | 58.0 mm (2.3 in) |
| 1986 | 95.5 mm (3.8 in) |
| 1987 | 33.8 mm (1.3 in) |
| 1988 | 75.6 mm (3.0 in) |
| 1989 | 65.5 mm (2.6 in) |
| 1990 | 61.7 mm (2.4 in) |
| 1991 | 80.5 mm (3.2 in) |
| 1992 | 91.7 mm (3.6 in) |
| 1993 | 88.9 mm (3.5 in) |
| 1994 | 94.2 mm (3.7 in) |
| 1995 | 76.2 mm (3.0 in) |
| 1996 | 71.4 mm (2.8 in) |
| 1997 | 44.0 mm (1.7 in) |
| 1998 | 133.1 mm (5.2 in) |
| 1999 | 66.0 mm (2.6 in) |
| 2000 | 70.3 mm (2.8 in) |
| 2001 | 56.9 mm (2.2 in) |
| 2002 | 85.6 mm (3.4 in) |
| 2003 | 114.6 mm (4.5 in) |
| 2004 | 82.8 mm (3.3 in) |
| 2005 | 110.2 mm (4.3 in) |
| 2006 | 105.2 mm (4.1 in) |
| 2007 | 75.2 mm (3.0 in) |
| 2008 | 83.0 mm (3.3 in) |
| 2009 | 84.1 mm (3.3 in) |
| 2010 | 58.4 mm (2.3 in) |
| 2011 | 92.2 mm (3.6 in) |
| 2012 | 115.6 mm (4.6 in) |
| 2013 | 82.6 mm (3.3 in) |
| 2014 | 116.0 mm (4.6 in) |
| 2015 | 56.4 mm (2.2 in) |
| 2016 | 104.7 mm (4.1 in) |
| 2017 | 80.9 mm (3.2 in) |
| 2018 | 73.9 mm (2.9 in) |
| 2019 | 99.5 mm (3.9 in) |
| 2020 | 47.0 mm (1.9 in) |
| 2021 | 114.6 mm (4.5 in) |
| 2022 | 52.0 mm (2.0 in) |
| 2023 | 126.8 mm (5.0 in) |
| 2024 | 70.4 mm (2.8 in) |
| 2025 | 148.6 mm (5.9 in) |
| 2026 | 150.9 mm (5.9 in) |
Longest dry spell (CDD)
| Year | Longest dry spell (CDD) |
|---|---|
| 1900 | 31 days |
| 1901 | 30 days |
| 1902 | 24 days |
| 1903 | 50 days |
| 1904 | 36 days |
| 1905 | 24 days |
| 1912 | 26 days |
| 1913 | 34 days |
| 1914 | 9 days |
| 1931 | 20 days |
| 1932 | 30 days |
| 1933 | 49 days |
| 1934 | 67 days |
| 1935 | 35 days |
| 1936 | 33 days |
| 1937 | 37 days |
| 1938 | 32 days |
| 1939 | 32 days |
| 1940 | 37 days |
| 1941 | 40 days |
| 1942 | 39 days |
| 1943 | 54 days |
| 1944 | 30 days |
| 1945 | 34 days |
| 1946 | 35 days |
| 1947 | 32 days |
| 1948 | 41 days |
| 1949 | 27 days |
| 1950 | 35 days |
| 1951 | 19 days |
| 1952 | 56 days |
| 1953 | 44 days |
| 1954 | 31 days |
| 1955 | 28 days |
| 1956 | 29 days |
| 1957 | 27 days |
| 1958 | 29 days |
| 1959 | 60 days |
| 1960 | 31 days |
| 1961 | 33 days |
| 1962 | 38 days |
| 1963 | 31 days |
| 1964 | 27 days |
| 1965 | 24 days |
| 1966 | 35 days |
| 1967 | 24 days |
| 1968 | 30 days |
| 1969 | 30 days |
| 1970 | 34 days |
| 1971 | 31 days |
| 1972 | 25 days |
| 1973 | 23 days |
| 1974 | 31 days |
| 1975 | 49 days |
| 1976 | 36 days |
| 1977 | 21 days |
| 1978 | 34 days |
| 1979 | 29 days |
| 1980 | 70 days |
| 1981 | 30 days |
| 1982 | 29 days |
| 1983 | 28 days |
| 1984 | 27 days |
| 1985 | 33 days |
| 1986 | 43 days |
| 1987 | 26 days |
| 1988 | 28 days |
| 1989 | 34 days |
| 1990 | 62 days |
| 1991 | 48 days |
| 1992 | 38 days |
| 1993 | 19 days |
| 1994 | 24 days |
| 1995 | 18 days |
| 1996 | 17 days |
| 1997 | 20 days |
| 1998 | 37 days |
| 1999 | 56 days |
| 2000 | 23 days |
| 2001 | 29 days |
| 2002 | 17 days |
| 2003 | 31 days |
| 2004 | 24 days |
| 2005 | 30 days |
| 2006 | 43 days |
| 2007 | 26 days |
| 2008 | 31 days |
| 2009 | 26 days |
| 2010 | 36 days |
| 2011 | 26 days |
| 2012 | 29 days |
| 2013 | 33 days |
| 2014 | 32 days |
| 2015 | 21 days |
| 2016 | 20 days |
| 2017 | 40 days |
| 2018 | 39 days |
| 2019 | 39 days |
| 2020 | 31 days |
| 2021 | 49 days |
| 2022 | 28 days |
| 2023 | 27 days |
| 2024 | 38 days |
| 2025 | 34 days |
| 2026 | 27 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
88 years with a frostAcross 88 years with a frost, the median last spring frost at Sisseton falls on 9 May and the median first autumn frost on 28 September, which leaves a median of 146 days between them.
In 1994 to 2025 the median growing season was 155 days. That is 20 days more than in 1901 to 1963.
Fitted over all years, the growing season changes by +2.8 days per decade at this station.
| Measure | Median, all years | Earliest period (1901 to 1963) | Recent period (1994 to 2025) | Recent against earliest | Fitted trend |
|---|---|---|---|---|---|
| Last spring frost | 9 May | 12 May | 2 May | 10 days earlier | -1.5 days per decade |
| First autumn frost | 28 September | 25 September | 7 October | 12 days later | +1.3 days per decade |
| Growing days | 146 days | 135 days | 155 days | 20 days more | +2.8 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
95 years, 1900 to 2025A day with at least 53.0 mm (2.1 in) of rain is expected about once in 2 years. A day with at least 135.7 mm (5.3 in) of rain is expected about once in 100 years.
| Expected about once in | A day with at least | Note |
|---|---|---|
| 2 years | 53.0 mm (2.1 in) | |
| 5 years | 73.5 mm (2.9 in) | |
| 10 years | 87.7 mm (3.5 in) | |
| 25 years | 106.4 mm (4.2 in) | |
| 50 years | 120.9 mm (4.8 in) | |
| 100 years | 135.7 mm (5.3 in) | Longer than the 95 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, 95 years of values from 1900 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: 139.7 mm (5.5 in) in 1954; 130.0 mm (5.1 in) in 1939; 127.0 mm (5.0 in) in 1901.
Station Changes
2 suspected2 changes were suspected in the annual mean temperature of Sisseton, at 1959 and 1977. Each is measured against neighbouring stations.
- Relative to 5 neighbouring stations, the station's annual mean temperature from 1959 ran 0.4 C (0.7 F) higher than in the years before (likely change).
- Relative to 5 neighbouring stations, the station's annual mean temperature from 1977 ran 0.4 C (0.8 F) lower than in the years before (likely change).
| Year | Shift (C) | Shift (F) | Strength | Neighbours |
|---|---|---|---|---|
| 1959 | +0.4 | +0.7 | likely | 5 |
| 1977 | -0.4 | -0.8 | 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
2011 to 2025 against 1961 to 1990Over 2011 to 2025, Sisseton had a mean temperature of 7.0 C (44.5 F) and 623.4 mm (24.5 in) of rain a year. The 3 stations whose 1961 to 1990 climate was closest to that are Tyler (United States, 170 km away), Lamberton SW Rsch & Outreach C (United States, 209 km away) and Lake Park 3SSE (United States, 287 km away).
| Twin station | Country | Distance away | Mean temperature, 1961-1990 | Rain a year, 1961-1990 | Climate difference |
|---|---|---|---|---|---|
| Tyler | United States | 170 km (106 mi) | 6.5 C (43.8 F) | 614.0 mm (24.2 in) | 0.94 |
| Lamberton SW Rsch & Outreach C | United States | 209 km (130 mi) | 6.9 C (44.4 F) | 641.0 mm (25.2 in) | 0.98 |
| Lake Park 3SSE | United States | 287 km (178 mi) | 7.1 C (44.8 F) | 679.7 mm (26.8 in) | 0.98 |
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 2026-10-15 (15 October 2026). Records are computed by this site and are not official.
Data as of . Last revised (2026-10-15).