Sumter Weather Records (USC00388440)
Record envelope, standing records and threshold days for Sumter (USC00388440), South Carolina, United States, with 126 years of record.
Key Facts for Sumter
- Sumter (USC00388440) is a weather station in South Carolina, United States at 33.94 latitude and -80.35 longitude, 53 m (174 ft) above sea level.
- The station reports from 1901 to 2026, 126 years of record.
- 1,464 records set at Sumter still stand.
- Records are tracked for tmax, tmin, prcp, snow, snwd: an element needs 30 years of data to be eligible.
- Sumter set a daily record high maximum temperature of 31.7 C (89.1 F) on 14 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 Carolina, United States, 33.94 latitude, -80.35 longitude.
- Elevation: 53 m (174 ft).
- Period of record: 1901 to 2026, 126 years.
- Eligible elements: tmax, tmin, prcp, snow, snwd.
Daily Record Envelope and 2026
10 days at or beyond a record| Month | Highest record high | Lowest record low | 2026 highest maximum | 2026 lowest minimum |
|---|---|---|---|---|
| Jan | 28.3 C (82.9 F) | -16.7 C (1.9 F) | 26.7 C (80.1 F) | -7.8 C (18.0 F) |
| Feb | 30.0 C (86.0 F) | -15.6 C (3.9 F) | 26.7 C (80.1 F) | -9.4 C (15.1 F) |
| Mar | 36.1 C (97.0 F) | -11.7 C (10.9 F) | 32.2 C (90.0 F) | -0.6 C (30.9 F) |
| Apr | 34.4 C (93.9 F) | -3.9 C (25.0 F) | 33.9 C (93.0 F) | 4.4 C (39.9 F) |
| May | 40.0 C (104.0 F) | 2.2 C (36.0 F) | 33.9 C (93.0 F) | 7.2 C (45.0 F) |
| Jun | 39.4 C (102.9 F) | 6.1 C (43.0 F) | 37.2 C (99.0 F) | 11.1 C (52.0 F) |
| Jul | 40.6 C (105.1 F) | 11.1 C (52.0 F) | 37.8 C (100.0 F) | 19.4 C (66.9 F) |
| Aug | 40.6 C (105.1 F) | 10.0 C (50.0 F) | 37.2 C (99.0 F) | 21.7 C (71.1 F) |
| Sep | 38.9 C (102.0 F) | 3.3 C (37.9 F) | 35.6 C (96.1 F) | 8.9 C (48.0 F) |
| Oct | 37.8 C (100.0 F) | -4.4 C (24.1 F) | 32.8 C (91.0 F) | 12.2 C (54.0 F) |
| Nov | 32.2 C (90.0 F) | -8.9 C (16.0 F) | n/a | n/a |
| Dec | 28.9 C (84.0 F) | -13.3 C (8.1 F) | n/a | n/a |
Which Years Hold Standing Records
1,464 standing records| Year set | Standing records |
|---|---|
| 1901 | 4 |
| 1902 | 15 |
| 1903 | 14 |
| 1904 | 9 |
| 1905 | 6 |
| 1906 | 18 |
| 1907 | 6 |
| 1913 | 29 |
| 1929 | 8 |
| 1930 | 22 |
| 1931 | 21 |
| 1932 | 17 |
| 1933 | 12 |
| 1934 | 18 |
| 1935 | 25 |
| 1936 | 10 |
| 1937 | 28 |
| 1938 | 13 |
| 1939 | 17 |
| 1940 | 17 |
| 1941 | 17 |
| 1942 | 19 |
| 1943 | 23 |
| 1944 | 27 |
| 1945 | 26 |
| 1946 | 22 |
| 1947 | 22 |
| 1948 | 7 |
| 1949 | 11 |
| 1950 | 21 |
| 1951 | 14 |
| 1952 | 10 |
| 1953 | 9 |
| 1954 | 20 |
| 1955 | 11 |
| 1956 | 8 |
| 1957 | 11 |
| 1958 | 18 |
| 1959 | 12 |
| 1960 | 16 |
| 1961 | 21 |
| 1962 | 17 |
| 1963 | 16 |
| 1964 | 15 |
| 1965 | 13 |
| 1966 | 11 |
| 1967 | 31 |
| 1968 | 10 |
| 1969 | 6 |
| 1970 | 11 |
| 1971 | 10 |
| 1972 | 10 |
| 1973 | 11 |
| 1974 | 22 |
| 1975 | 8 |
| 1976 | 15 |
| 1977 | 16 |
| 1978 | 6 |
| 1979 | 14 |
| 1980 | 16 |
| 1981 | 22 |
| 1982 | 10 |
| 1983 | 21 |
| 1984 | 6 |
| 1985 | 12 |
| 1986 | 23 |
| 1987 | 6 |
| 1988 | 14 |
| 1989 | 19 |
| 1990 | 6 |
| 1991 | 12 |
| 1992 | 20 |
| 1993 | 14 |
| 1994 | 9 |
| 1995 | 7 |
| 1996 | 19 |
| 1997 | 20 |
| 1998 | 6 |
| 1999 | 12 |
| 2000 | 9 |
| 2001 | 10 |
| 2002 | 22 |
| 2003 | 9 |
| 2004 | 6 |
| 2005 | 7 |
| 2006 | 6 |
| 2007 | 13 |
| 2008 | 11 |
| 2009 | 9 |
| 2010 | 6 |
| 2011 | 10 |
| 2012 | 10 |
| 2013 | 14 |
| 2014 | 28 |
| 2015 | 19 |
| 2016 | 3 |
| 2017 | 9 |
| 2018 | 11 |
| 2019 | 8 |
| 2020 | 10 |
| 2021 | 8 |
| 2022 | 13 |
| 2023 | 9 |
| 2024 | 7 |
| 2025 | 12 |
| 2026 | 15 |
All-Time Record Progression
5 new records| Date | Kind | Detail |
|---|---|---|
| 1962-01-12 | Record low maximum temperature | Record low maximum temperature -3.9 C (25.0 F) |
| 1973-02-12 | Record low minimum temperature | Record low minimum temperature -15.6 C (3.9 F) |
| 1985-01-21 | Record low minimum temperature | Record low minimum temperature -16.7 C (1.9 F) |
| 1989-12-23 | Record low maximum temperature | Record low maximum temperature -6.1 C (21.0 F) |
| 2015-10-04 | Record daily precipitation | Record daily precipitation 271.0 mm (10.7 in) |
Wettest Day of Each Month
Oct: 271.0 mm (10.7 in)| Month | Record daily precipitation (mm) | Date |
|---|---|---|
| Jan | 66.5 mm (2.6 in) | 10 January 2024 |
| Feb | 78.5 mm (3.1 in) | 26 February 1939 |
| Mar | 137.2 mm (5.4 in) | 27 March 2023 |
| Apr | 81.5 mm (3.2 in) | 16 April 1958 |
| May | 91.4 mm (3.6 in) | 20 May 1969 |
| Jun | 177.3 mm (7.0 in) | 18 June 1954 |
| Jul | 139.7 mm (5.5 in) | 24 July 1994 |
| Aug | 142.2 mm (5.6 in) | 5 August 1946 |
| Sep | 220.5 mm (8.7 in) | 17 September 1945 |
| Oct | 271.0 mm (10.7 in) | 4 October 2015 |
| Nov | 73.7 mm (2.9 in) | 6 November 1963 |
| Dec | 98.3 mm (3.9 in) | 28 December 1992 |
Period of Record Coverage
1901 to 2026| Year | Days with data | Share of year | Complete |
|---|---|---|---|
| 1901 | 31 | 8% | No |
| 1902 | 252 | 69% | No |
| 1903 | 254 | 70% | No |
| 1904 | 177 | 48% | No |
| 1905 | 106 | 29% | No |
| 1906 | 321 | 88% | No |
| 1907 | 28 | 8% | No |
| 1913 | 93 | 25% | No |
| 1929 | 74 | 20% | No |
| 1930 | 361 | 99% | Yes |
| 1931 | 356 | 98% | Yes |
| 1932 | 321 | 88% | No |
| 1933 | 252 | 69% | No |
| 1934 | 333 | 91% | Yes |
| 1935 | 362 | 99% | Yes |
| 1936 | 366 | 100% | Yes |
| 1937 | 365 | 100% | Yes |
| 1938 | 365 | 100% | Yes |
| 1939 | 365 | 100% | Yes |
| 1940 | 366 | 100% | Yes |
| 1941 | 363 | 99% | Yes |
| 1942 | 357 | 98% | Yes |
| 1943 | 346 | 95% | Yes |
| 1944 | 360 | 98% | Yes |
| 1945 | 360 | 99% | Yes |
| 1946 | 363 | 99% | Yes |
| 1947 | 363 | 99% | Yes |
| 1948 | 364 | 99% | Yes |
| 1949 | 332 | 91% | Yes |
| 1950 | 334 | 92% | Yes |
| 1951 | 364 | 100% | Yes |
| 1952 | 366 | 100% | Yes |
| 1953 | 365 | 100% | Yes |
| 1954 | 332 | 91% | Yes |
| 1955 | 303 | 83% | No |
| 1956 | 334 | 91% | Yes |
| 1957 | 361 | 99% | Yes |
| 1958 | 364 | 100% | Yes |
| 1959 | 365 | 100% | Yes |
| 1960 | 362 | 99% | Yes |
| 1961 | 334 | 92% | Yes |
| 1962 | 363 | 99% | Yes |
| 1963 | 365 | 100% | Yes |
| 1964 | 366 | 100% | Yes |
| 1965 | 365 | 100% | Yes |
| 1966 | 364 | 100% | Yes |
| 1967 | 365 | 100% | Yes |
| 1968 | 365 | 100% | Yes |
| 1969 | 364 | 100% | Yes |
| 1970 | 365 | 100% | Yes |
| 1971 | 365 | 100% | Yes |
| 1972 | 366 | 100% | Yes |
| 1973 | 360 | 99% | Yes |
| 1974 | 365 | 100% | Yes |
| 1975 | 363 | 99% | Yes |
| 1976 | 362 | 99% | Yes |
| 1977 | 363 | 99% | Yes |
| 1978 | 361 | 99% | Yes |
| 1979 | 356 | 98% | Yes |
| 1980 | 365 | 100% | Yes |
| 1981 | 362 | 99% | Yes |
| 1982 | 363 | 99% | Yes |
| 1983 | 365 | 100% | Yes |
| 1984 | 366 | 100% | Yes |
| 1985 | 363 | 99% | Yes |
| 1986 | 364 | 100% | Yes |
| 1987 | 365 | 100% | Yes |
| 1988 | 366 | 100% | Yes |
| 1989 | 358 | 98% | Yes |
| 1990 | 365 | 100% | Yes |
| 1991 | 365 | 100% | Yes |
| 1992 | 365 | 100% | Yes |
| 1993 | 363 | 99% | Yes |
| 1994 | 364 | 100% | Yes |
| 1995 | 354 | 97% | Yes |
| 1996 | 344 | 94% | Yes |
| 1997 | 354 | 97% | Yes |
| 1998 | 364 | 100% | Yes |
| 1999 | 323 | 88% | No |
| 2000 | 365 | 100% | Yes |
| 2001 | 365 | 100% | Yes |
| 2002 | 365 | 100% | Yes |
| 2003 | 364 | 100% | Yes |
| 2004 | 366 | 100% | Yes |
| 2005 | 364 | 100% | Yes |
| 2006 | 362 | 99% | Yes |
| 2007 | 332 | 91% | Yes |
| 2008 | 366 | 100% | Yes |
| 2009 | 365 | 100% | Yes |
| 2010 | 365 | 100% | Yes |
| 2011 | 365 | 100% | Yes |
| 2012 | 365 | 100% | Yes |
| 2013 | 364 | 100% | Yes |
| 2014 | 356 | 98% | Yes |
| 2015 | 358 | 98% | Yes |
| 2016 | 333 | 91% | Yes |
| 2017 | 365 | 100% | Yes |
| 2018 | 347 | 95% | Yes |
| 2019 | 345 | 95% | Yes |
| 2020 | 366 | 100% | Yes |
| 2021 | 365 | 100% | Yes |
| 2022 | 359 | 98% | Yes |
| 2023 | 362 | 99% | Yes |
| 2024 | 363 | 99% | Yes |
| 2025 | 361 | 99% | Yes |
| 2026 | 250 | 68% | No |
Latest Records
20| Date | Station | Record | Value | Beat old record by | Old record stood | Significance |
|---|---|---|---|---|---|---|
| 14 October 2026 | Sumter, US | daily high max (Provisional) | 31.7 C (89.1 F) | 1.1 C (2.0 F) | 85 years | 37 of 100 (Notable) |
| 3 October 2026 | Sumter, US | daily high min (Tie, Provisional) | 21.7 C (71.1 F) | tie | 13 years | 3 of 100 (Routine) |
| 22 September 2026 | Sumter, US | daily high max (Tie, Provisional) | 35.6 C (96.1 F) | tie | 85 years | 8 of 100 (Routine) |
| 17 August 2026 | Sumter, US | daily high min (Tie) | 25.0 C (77.0 F) | tie | 83 years | 8 of 100 (Routine) |
| 16 August 2026 | Sumter, US | daily high min | 25.6 C (78.1 F) | 1.7 C (3.1 F) | 20 years | 23 of 100 (Routine) |
| 23 July 2026 | Sumter, US | daily high min | 26.1 C (79.0 F) | 1.7 C (3.1 F) | 96 years | 46 of 100 (Notable) |
| 22 July 2026 | Sumter, US | daily high min | 25.6 C (78.1 F) | 0.6 C (1.1 F) | 0 years | 12 of 100 (Routine) |
| 20 July 2026 | Sumter, US | daily high min | 26.1 C (79.0 F) | 0.5 C (0.9 F) | 84 years | 37 of 100 (Notable) |
| 18 July 2026 | Sumter, US | daily high max (Tie) | 37.8 C (100.0 F) | tie | 84 years | 8 of 100 (Routine) |
| 17 July 2026 | Sumter, US | daily high min | 26.1 C (79.0 F) | 1.7 C (3.1 F) | 7 years | 20 of 100 (Routine) |
| 9 July 2026 | Sumter, US | daily high min (Tie) | 26.1 C (79.0 F) | tie | 48 years | 6 of 100 (Routine) |
| 5 July 2026 | Sumter, US | daily high min (Tie) | 25.0 C (77.0 F) | tie | 124 years | 10 of 100 (Routine) |
| 13 June 2026 | Sumter, US | daily high min | 25.0 C (77.0 F) | 0.6 C (1.1 F) | 4 years | 13 of 100 (Routine) |
| 12 June 2026 | Sumter, US | daily high min (Tie) | 23.9 C (75.0 F) | tie | 68 years | 7 of 100 (Routine) |
| 11 June 2026 | Sumter, US | daily high min (Tie) | 23.3 C (73.9 F) | tie | 73 years | 8 of 100 (Routine) |
| 1 June 2026 | Sumter, US | daily low max | 22.2 C (72.0 F) | 0.6 C (1.1 F) | 20 years | 17 of 100 (Routine) |
| 28 May 2026 | Sumter, US | daily high min (Tie) | 23.3 C (73.9 F) | tie | 21 years | 4 of 100 (Routine) |
| 26 May 2026 | Sumter, US | daily high min (Tie) | 22.2 C (72.0 F) | tie | 123 years | 10 of 100 (Routine) |
| 3 May 2026 | Sumter, US | daily low max (Tie) | 15.0 C (59.0 F) | tie | 61 years | 7 of 100 (Routine) |
| 19 April 2026 | Sumter, US | daily high max | 33.9 C (93.0 F) | 0.6 C (1.1 F) | 84 years | 36 of 100 (Notable) |
Climate Trend
80 complete years, 1930 to 2025| Year | Annual mean temperature | Difference from the station mean |
|---|---|---|
| 1930 | 17.5 C | +0.09 C |
| 1931 | 18.1 C | +0.65 C |
| 1935 | 17.7 C | +0.33 C |
| 1936 | 17.6 C | +0.23 C |
| 1937 | 17.5 C | +0.07 C |
| 1938 | 18.2 C | +0.78 C |
| 1939 | 18.4 C | +0.99 C |
| 1940 | 17.1 C | -0.26 C |
| 1941 | 18.2 C | +0.79 C |
| 1942 | 18.4 C | +1.03 C |
| 1943 | 18.3 C | +0.87 C |
| 1944 | 18.5 C | +1.08 C |
| 1945 | 19.2 C | +1.83 C |
| 1946 | 19.1 C | +1.68 C |
| 1947 | 18.1 C | +0.70 C |
| 1948 | 17.7 C | +0.33 C |
| 1951 | 18.3 C | +0.92 C |
| 1952 | 18.3 C | +0.88 C |
| 1953 | 18.5 C | +1.07 C |
| 1957 | 18.4 C | +1.00 C |
| 1958 | 16.8 C | -0.60 C |
| 1959 | 17.1 C | -0.27 C |
| 1960 | 16.8 C | -0.62 C |
| 1962 | 16.7 C | -0.72 C |
| 1964 | 16.7 C | -0.75 C |
| 1965 | 16.9 C | -0.51 C |
| 1966 | 16.1 C | -1.31 C |
| 1967 | 16.2 C | -1.17 C |
| 1968 | 17.0 C | -0.45 C |
| 1969 | 17.2 C | -0.17 C |
| 1970 | 18.0 C | +0.57 C |
| 1971 | 17.9 C | +0.52 C |
| 1972 | 18.0 C | +0.64 C |
| 1973 | 18.1 C | +0.74 C |
| 1974 | 18.5 C | +1.07 C |
| 1975 | 18.4 C | +0.98 C |
| 1976 | 17.1 C | -0.29 C |
| 1977 | 17.9 C | +0.53 C |
| 1978 | 17.4 C | +0.01 C |
| 1979 | 17.1 C | -0.27 C |
| 1980 | 17.5 C | +0.09 C |
| 1981 | 16.2 C | -1.18 C |
| 1982 | 17.1 C | -0.31 C |
| 1983 | 16.3 C | -1.12 C |
| 1984 | 16.9 C | -0.46 C |
| 1985 | 17.3 C | -0.06 C |
| 1986 | 17.9 C | +0.48 C |
| 1987 | 16.8 C | -0.64 C |
| 1988 | 16.2 C | -1.23 C |
| 1989 | 16.9 C | -0.55 C |
| 1990 | 18.5 C | +1.08 C |
| 1991 | 17.6 C | +0.21 C |
| 1992 | 16.3 C | -1.12 C |
| 1993 | 17.0 C | -0.42 C |
| 1994 | 17.2 C | -0.18 C |
| 1995 | 16.8 C | -0.59 C |
| 1997 | 16.8 C | -0.56 C |
| 1998 | 17.8 C | +0.43 C |
| 2000 | 17.2 C | -0.25 C |
| 2001 | 17.7 C | +0.33 C |
| 2002 | 17.8 C | +0.36 C |
| 2003 | 17.0 C | -0.44 C |
| 2004 | 17.3 C | -0.11 C |
| 2005 | 17.2 C | -0.18 C |
| 2006 | 17.4 C | +0.04 C |
| 2008 | 16.8 C | -0.63 C |
| 2009 | 16.3 C | -1.12 C |
| 2010 | 16.0 C | -1.42 C |
| 2011 | 16.6 C | -0.78 C |
| 2012 | 16.6 C | -0.82 C |
| 2013 | 15.3 C | -2.10 C |
| 2014 | 14.9 C | -2.46 C |
| 2015 | 16.1 C | -1.30 C |
| 2017 | 17.9 C | +0.53 C |
| 2020 | 17.4 C | -0.01 C |
| 2021 | 17.1 C | -0.33 C |
| 2022 | 18.0 C | +0.55 C |
| 2023 | 18.5 C | +1.05 C |
| 2024 | 18.8 C | +1.37 C |
| 2025 | 18.1 C | +0.72 C |
The annual mean temperature here has fallen by 0.1 C (0.1 to 0.2) per decade over 1930 to 2025. In Fahrenheit: 0.2 F (0.1 to 0.3) per decade. The slope is a straight line fitted to 80 complete years; the brackets give its 95 percent interval.
| Measure | Per decade (C) | Per decade (F) | Period | Complete years | Reading |
|---|---|---|---|---|---|
| Annual mean temperature | -0.1 C (-0.2 to -0.1) per decade | -0.2 F (-0.3 to -0.1) per decade | 1930 to 2025 | 80 | Fall |
| Mean daily maximum | -0.2 C (-0.2 to -0.1) per decade | -0.3 F (-0.4 to -0.2) per decade | 1930 to 2025 | 80 | Fall |
| Mean daily minimum | -0.06 C (-0.13 to 0.01) per decade | -0.11 F (-0.24 to 0.03) per decade | 1930 to 2025 | 80 | Not clearly different from zero |
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
1901 to 2026| Measure | Record | Year of the record | Median year | Years with a value |
|---|---|---|---|---|
| Hottest day (TXx) | 40.6 C (105.1 F) | 1902 | 37.8 C (100.0 F) | 106 |
| Coldest night (TNn) | -16.7 C (1.9 F) | 1985 | -9.4 C (15.1 F) | 106 |
| Wettest day (Rx1day) | 271.0 mm (10.7 in) | 2015 | 72.4 mm (2.8 in) | 106 |
| Wettest five days (Rx5day) | 564.7 mm (22.2 in) | 2015 | 116.1 mm (4.6 in) | 105 |
| Longest dry spell (CDD) | 44 days | 1976 | 22 days | 105 |
Hottest day (TXx)
| Year | Hottest day (TXx) |
|---|---|
| 1901 | 26.7 C (80.1 F) |
| 1902 | 40.6 C (105.1 F) |
| 1903 | 40.0 C (104.0 F) |
| 1904 | 40.6 C (105.1 F) |
| 1905 | 33.9 C (93.0 F) |
| 1906 | 37.2 C (99.0 F) |
| 1907 | 25.6 C (78.1 F) |
| 1913 | 38.9 C (102.0 F) |
| 1929 | 32.2 C (90.0 F) |
| 1930 | 37.8 C (100.0 F) |
| 1931 | 38.9 C (102.0 F) |
| 1932 | 38.9 C (102.0 F) |
| 1933 | 36.7 C (98.1 F) |
| 1934 | 38.3 C (100.9 F) |
| 1935 | 38.9 C (102.0 F) |
| 1936 | 39.4 C (102.9 F) |
| 1937 | 36.7 C (98.1 F) |
| 1938 | 37.2 C (99.0 F) |
| 1939 | 38.3 C (100.9 F) |
| 1940 | 39.4 C (102.9 F) |
| 1941 | 38.3 C (100.9 F) |
| 1942 | 39.4 C (102.9 F) |
| 1943 | 38.9 C (102.0 F) |
| 1944 | 38.9 C (102.0 F) |
| 1945 | 39.4 C (102.9 F) |
| 1946 | 37.8 C (100.0 F) |
| 1947 | 38.9 C (102.0 F) |
| 1948 | 38.3 C (100.9 F) |
| 1949 | 40.0 C (104.0 F) |
| 1950 | 38.9 C (102.0 F) |
| 1951 | 38.3 C (100.9 F) |
| 1952 | 39.4 C (102.9 F) |
| 1953 | 38.9 C (102.0 F) |
| 1954 | 40.0 C (104.0 F) |
| 1955 | 36.1 C (97.0 F) |
| 1956 | 37.8 C (100.0 F) |
| 1957 | 37.2 C (99.0 F) |
| 1958 | 38.3 C (100.9 F) |
| 1959 | 40.0 C (104.0 F) |
| 1960 | 37.2 C (99.0 F) |
| 1961 | 36.1 C (97.0 F) |
| 1962 | 37.8 C (100.0 F) |
| 1963 | 38.9 C (102.0 F) |
| 1964 | 37.2 C (99.0 F) |
| 1965 | 36.1 C (97.0 F) |
| 1966 | 37.2 C (99.0 F) |
| 1967 | 35.0 C (95.0 F) |
| 1968 | 38.9 C (102.0 F) |
| 1969 | 37.8 C (100.0 F) |
| 1970 | 38.9 C (102.0 F) |
| 1971 | 36.1 C (97.0 F) |
| 1972 | 35.6 C (96.1 F) |
| 1973 | 35.0 C (95.0 F) |
| 1974 | 36.7 C (98.1 F) |
| 1975 | 37.2 C (99.0 F) |
| 1976 | 36.1 C (97.0 F) |
| 1977 | 40.0 C (104.0 F) |
| 1978 | 38.3 C (100.9 F) |
| 1979 | 37.2 C (99.0 F) |
| 1980 | 40.6 C (105.1 F) |
| 1981 | 38.9 C (102.0 F) |
| 1982 | 37.8 C (100.0 F) |
| 1983 | 40.6 C (105.1 F) |
| 1984 | 37.8 C (100.0 F) |
| 1985 | 37.8 C (100.0 F) |
| 1986 | 40.6 C (105.1 F) |
| 1987 | 38.3 C (100.9 F) |
| 1988 | 37.8 C (100.0 F) |
| 1989 | 37.2 C (99.0 F) |
| 1990 | 39.4 C (102.9 F) |
| 1991 | 37.2 C (99.0 F) |
| 1992 | 37.8 C (100.0 F) |
| 1993 | 40.0 C (104.0 F) |
| 1994 | 36.7 C (98.1 F) |
| 1995 | 38.9 C (102.0 F) |
| 1996 | 37.8 C (100.0 F) |
| 1997 | 37.2 C (99.0 F) |
| 1998 | 38.9 C (102.0 F) |
| 1999 | 40.0 C (104.0 F) |
| 2000 | 36.7 C (98.1 F) |
| 2001 | 36.1 C (97.0 F) |
| 2002 | 38.9 C (102.0 F) |
| 2003 | 34.4 C (93.9 F) |
| 2004 | 36.1 C (97.0 F) |
| 2005 | 38.3 C (100.9 F) |
| 2006 | 37.2 C (99.0 F) |
| 2007 | 40.0 C (104.0 F) |
| 2008 | 37.2 C (99.0 F) |
| 2009 | 36.7 C (98.1 F) |
| 2010 | 36.7 C (98.1 F) |
| 2011 | 37.2 C (99.0 F) |
| 2012 | 39.4 C (102.9 F) |
| 2013 | 33.9 C (93.0 F) |
| 2014 | 34.4 C (93.9 F) |
| 2015 | 36.1 C (97.0 F) |
| 2016 | 36.7 C (98.1 F) |
| 2017 | 36.7 C (98.1 F) |
| 2018 | 36.7 C (98.1 F) |
| 2019 | 37.2 C (99.0 F) |
| 2020 | 35.6 C (96.1 F) |
| 2021 | 34.4 C (93.9 F) |
| 2022 | 37.8 C (100.0 F) |
| 2023 | 37.2 C (99.0 F) |
| 2024 | 38.3 C (100.9 F) |
| 2025 | 38.3 C (100.9 F) |
| 2026 | 37.8 C (100.0 F) |
Coldest night (TNn)
| Year | Coldest night (TNn) |
|---|---|
| 1901 | -12.2 C (10.0 F) |
| 1902 | -7.2 C (19.0 F) |
| 1903 | -5.6 C (21.9 F) |
| 1904 | -3.3 C (26.1 F) |
| 1905 | -7.8 C (18.0 F) |
| 1906 | -11.1 C (12.0 F) |
| 1907 | 6.7 C (44.1 F) |
| 1913 | 7.2 C (45.0 F) |
| 1929 | -9.4 C (15.1 F) |
| 1930 | -6.1 C (21.0 F) |
| 1931 | -7.2 C (19.0 F) |
| 1932 | -6.1 C (21.0 F) |
| 1933 | -7.8 C (18.0 F) |
| 1934 | -12.8 C (9.0 F) |
| 1935 | -10.6 C (12.9 F) |
| 1936 | -13.9 C (7.0 F) |
| 1937 | -10.6 C (12.9 F) |
| 1938 | -10.0 C (14.0 F) |
| 1939 | -6.7 C (19.9 F) |
| 1940 | -12.2 C (10.0 F) |
| 1941 | -6.1 C (21.0 F) |
| 1942 | -10.6 C (12.9 F) |
| 1943 | -11.7 C (10.9 F) |
| 1944 | -7.8 C (18.0 F) |
| 1945 | -7.8 C (18.0 F) |
| 1946 | -7.2 C (19.0 F) |
| 1947 | -9.4 C (15.1 F) |
| 1948 | -11.1 C (12.0 F) |
| 1949 | -5.6 C (21.9 F) |
| 1950 | -8.9 C (16.0 F) |
| 1951 | -7.8 C (18.0 F) |
| 1952 | -6.7 C (19.9 F) |
| 1953 | -8.9 C (16.0 F) |
| 1954 | -7.2 C (19.0 F) |
| 1955 | -9.4 C (15.1 F) |
| 1956 | -6.7 C (19.9 F) |
| 1957 | -10.0 C (14.0 F) |
| 1958 | -12.8 C (9.0 F) |
| 1959 | -11.1 C (12.0 F) |
| 1960 | -10.6 C (12.9 F) |
| 1961 | -12.2 C (10.0 F) |
| 1962 | -13.3 C (8.1 F) |
| 1963 | -10.0 C (14.0 F) |
| 1964 | -8.9 C (16.0 F) |
| 1965 | -7.2 C (19.0 F) |
| 1966 | -12.2 C (10.0 F) |
| 1967 | -11.7 C (10.9 F) |
| 1968 | -8.3 C (17.1 F) |
| 1969 | -10.6 C (12.9 F) |
| 1970 | -13.3 C (8.1 F) |
| 1971 | -8.9 C (16.0 F) |
| 1972 | -11.1 C (12.0 F) |
| 1973 | -15.6 C (3.9 F) |
| 1974 | -6.1 C (21.0 F) |
| 1975 | -9.4 C (15.1 F) |
| 1976 | -10.6 C (12.9 F) |
| 1977 | -11.7 C (10.9 F) |
| 1978 | -10.0 C (14.0 F) |
| 1979 | -11.1 C (12.0 F) |
| 1980 | -11.7 C (10.9 F) |
| 1981 | -11.7 C (10.9 F) |
| 1982 | -13.3 C (8.1 F) |
| 1983 | -12.8 C (9.0 F) |
| 1984 | -9.4 C (15.1 F) |
| 1985 | -16.7 C (1.9 F) |
| 1986 | -12.8 C (9.0 F) |
| 1987 | -5.6 C (21.9 F) |
| 1988 | -8.3 C (17.1 F) |
| 1989 | -12.2 C (10.0 F) |
| 1990 | -4.4 C (24.1 F) |
| 1991 | -8.9 C (16.0 F) |
| 1992 | -8.3 C (17.1 F) |
| 1993 | -8.9 C (16.0 F) |
| 1994 | -12.8 C (9.0 F) |
| 1995 | -10.6 C (12.9 F) |
| 1996 | -10.0 C (14.0 F) |
| 1997 | -10.0 C (14.0 F) |
| 1998 | -6.1 C (21.0 F) |
| 1999 | -8.3 C (17.1 F) |
| 2000 | -6.7 C (19.9 F) |
| 2001 | -7.8 C (18.0 F) |
| 2002 | -6.7 C (19.9 F) |
| 2003 | -10.6 C (12.9 F) |
| 2004 | -10.6 C (12.9 F) |
| 2005 | -9.4 C (15.1 F) |
| 2006 | -8.3 C (17.1 F) |
| 2007 | -5.6 C (21.9 F) |
| 2008 | -8.9 C (16.0 F) |
| 2009 | -10.6 C (12.9 F) |
| 2010 | -10.0 C (14.0 F) |
| 2011 | -8.9 C (16.0 F) |
| 2012 | -8.3 C (17.1 F) |
| 2013 | -7.2 C (19.0 F) |
| 2014 | -11.7 C (10.9 F) |
| 2015 | -12.8 C (9.0 F) |
| 2016 | -7.8 C (18.0 F) |
| 2017 | -7.2 C (19.0 F) |
| 2018 | -11.7 C (10.9 F) |
| 2019 | -6.1 C (21.0 F) |
| 2020 | -7.2 C (19.0 F) |
| 2021 | -6.1 C (21.0 F) |
| 2022 | -10.0 C (14.0 F) |
| 2023 | -3.9 C (25.0 F) |
| 2024 | -8.9 C (16.0 F) |
| 2025 | -8.3 C (17.1 F) |
| 2026 | -9.4 C (15.1 F) |
Wettest day (Rx1day)
| Year | Wettest day (Rx1day) |
|---|---|
| 1901 | 50.8 mm (2.0 in) |
| 1902 | 44.2 mm (1.7 in) |
| 1903 | 78.7 mm (3.1 in) |
| 1904 | 51.1 mm (2.0 in) |
| 1905 | 76.2 mm (3.0 in) |
| 1906 | 109.2 mm (4.3 in) |
| 1907 | 22.9 mm (0.9 in) |
| 1913 | 51.1 mm (2.0 in) |
| 1929 | 52.8 mm (2.1 in) |
| 1930 | 50.8 mm (2.0 in) |
| 1931 | 43.2 mm (1.7 in) |
| 1932 | 115.1 mm (4.5 in) |
| 1933 | 54.6 mm (2.1 in) |
| 1934 | 49.0 mm (1.9 in) |
| 1935 | 57.2 mm (2.3 in) |
| 1936 | 66.3 mm (2.6 in) |
| 1937 | 53.8 mm (2.1 in) |
| 1938 | 66.0 mm (2.6 in) |
| 1939 | 78.5 mm (3.1 in) |
| 1940 | 52.6 mm (2.1 in) |
| 1941 | 69.6 mm (2.7 in) |
| 1942 | 81.3 mm (3.2 in) |
| 1943 | 72.6 mm (2.9 in) |
| 1944 | 101.6 mm (4.0 in) |
| 1945 | 220.5 mm (8.7 in) |
| 1946 | 142.2 mm (5.6 in) |
| 1947 | 73.9 mm (2.9 in) |
| 1948 | 61.0 mm (2.4 in) |
| 1949 | 77.5 mm (3.1 in) |
| 1950 | 71.6 mm (2.8 in) |
| 1951 | 39.6 mm (1.6 in) |
| 1952 | 59.7 mm (2.4 in) |
| 1953 | 91.9 mm (3.6 in) |
| 1954 | 177.3 mm (7.0 in) |
| 1955 | 57.9 mm (2.3 in) |
| 1956 | 60.2 mm (2.4 in) |
| 1957 | 66.0 mm (2.6 in) |
| 1958 | 81.5 mm (3.2 in) |
| 1959 | 204.2 mm (8.0 in) |
| 1960 | 76.7 mm (3.0 in) |
| 1961 | 61.5 mm (2.4 in) |
| 1962 | 86.4 mm (3.4 in) |
| 1963 | 73.7 mm (2.9 in) |
| 1964 | 110.5 mm (4.4 in) |
| 1965 | 92.7 mm (3.6 in) |
| 1966 | 82.8 mm (3.3 in) |
| 1967 | 74.7 mm (2.9 in) |
| 1968 | 51.6 mm (2.0 in) |
| 1969 | 91.4 mm (3.6 in) |
| 1970 | 167.1 mm (6.6 in) |
| 1971 | 80.0 mm (3.1 in) |
| 1972 | 50.8 mm (2.0 in) |
| 1973 | 168.4 mm (6.6 in) |
| 1974 | 70.4 mm (2.8 in) |
| 1975 | 65.3 mm (2.6 in) |
| 1976 | 83.3 mm (3.3 in) |
| 1977 | 67.8 mm (2.7 in) |
| 1978 | 64.8 mm (2.6 in) |
| 1979 | 137.4 mm (5.4 in) |
| 1980 | 63.5 mm (2.5 in) |
| 1981 | 86.4 mm (3.4 in) |
| 1982 | 54.6 mm (2.1 in) |
| 1983 | 85.3 mm (3.4 in) |
| 1984 | 59.7 mm (2.4 in) |
| 1985 | 91.2 mm (3.6 in) |
| 1986 | 67.8 mm (2.7 in) |
| 1987 | 50.8 mm (2.0 in) |
| 1988 | 53.3 mm (2.1 in) |
| 1989 | 107.4 mm (4.2 in) |
| 1990 | 208.5 mm (8.2 in) |
| 1991 | 111.8 mm (4.4 in) |
| 1992 | 98.3 mm (3.9 in) |
| 1993 | 57.9 mm (2.3 in) |
| 1994 | 139.7 mm (5.5 in) |
| 1995 | 117.3 mm (4.6 in) |
| 1996 | 51.3 mm (2.0 in) |
| 1997 | 79.8 mm (3.1 in) |
| 1998 | 107.7 mm (4.2 in) |
| 1999 | 65.5 mm (2.6 in) |
| 2000 | 105.9 mm (4.2 in) |
| 2001 | 79.8 mm (3.1 in) |
| 2002 | 72.1 mm (2.8 in) |
| 2003 | 65.5 mm (2.6 in) |
| 2004 | 77.5 mm (3.1 in) |
| 2005 | 79.2 mm (3.1 in) |
| 2006 | 63.5 mm (2.5 in) |
| 2007 | 47.0 mm (1.9 in) |
| 2008 | 69.9 mm (2.8 in) |
| 2009 | 55.9 mm (2.2 in) |
| 2010 | 78.7 mm (3.1 in) |
| 2011 | 55.9 mm (2.2 in) |
| 2012 | 53.8 mm (2.1 in) |
| 2013 | 63.5 mm (2.5 in) |
| 2014 | 64.8 mm (2.6 in) |
| 2015 | 271.0 mm (10.7 in) |
| 2016 | 136.7 mm (5.4 in) |
| 2017 | 59.9 mm (2.4 in) |
| 2018 | 91.2 mm (3.6 in) |
| 2019 | 53.3 mm (2.1 in) |
| 2020 | 182.4 mm (7.2 in) |
| 2021 | 84.6 mm (3.3 in) |
| 2022 | 106.7 mm (4.2 in) |
| 2023 | 137.2 mm (5.4 in) |
| 2024 | 93.5 mm (3.7 in) |
| 2025 | 64.3 mm (2.5 in) |
| 2026 | 46.2 mm (1.8 in) |
Wettest five days (Rx5day)
| Year | Wettest five days (Rx5day) |
|---|---|
| 1901 | 74.7 mm (2.9 in) |
| 1902 | 74.7 mm (2.9 in) |
| 1903 | 152.9 mm (6.0 in) |
| 1904 | 77.0 mm (3.0 in) |
| 1905 | 119.4 mm (4.7 in) |
| 1906 | 213.3 mm (8.4 in) |
| 1907 | n/a |
| 1913 | 64.5 mm (2.5 in) |
| 1929 | 62.9 mm (2.5 in) |
| 1930 | 79.3 mm (3.1 in) |
| 1931 | 98.3 mm (3.9 in) |
| 1932 | 157.0 mm (6.2 in) |
| 1933 | 73.9 mm (2.9 in) |
| 1934 | 69.0 mm (2.7 in) |
| 1935 | 95.4 mm (3.8 in) |
| 1936 | 109.5 mm (4.3 in) |
| 1937 | 92.2 mm (3.6 in) |
| 1938 | 107.7 mm (4.2 in) |
| 1939 | 149.1 mm (5.9 in) |
| 1940 | 109.8 mm (4.3 in) |
| 1941 | 163.1 mm (6.4 in) |
| 1942 | 103.8 mm (4.1 in) |
| 1943 | 85.9 mm (3.4 in) |
| 1944 | 105.9 mm (4.2 in) |
| 1945 | 319.3 mm (12.6 in) |
| 1946 | 166.6 mm (6.6 in) |
| 1947 | 117.9 mm (4.6 in) |
| 1948 | 107.5 mm (4.2 in) |
| 1949 | 122.0 mm (4.8 in) |
| 1950 | 114.6 mm (4.5 in) |
| 1951 | 63.5 mm (2.5 in) |
| 1952 | 96.5 mm (3.8 in) |
| 1953 | 110.7 mm (4.4 in) |
| 1954 | 207.8 mm (8.2 in) |
| 1955 | 72.9 mm (2.9 in) |
| 1956 | 92.7 mm (3.6 in) |
| 1957 | 66.0 mm (2.6 in) |
| 1958 | 95.2 mm (3.7 in) |
| 1959 | 214.1 mm (8.4 in) |
| 1960 | 122.2 mm (4.8 in) |
| 1961 | 125.7 mm (4.9 in) |
| 1962 | 92.1 mm (3.6 in) |
| 1963 | 107.9 mm (4.2 in) |
| 1964 | 187.3 mm (7.4 in) |
| 1965 | 173.5 mm (6.8 in) |
| 1966 | 121.4 mm (4.8 in) |
| 1967 | 117.9 mm (4.6 in) |
| 1968 | 129.6 mm (5.1 in) |
| 1969 | 122.2 mm (4.8 in) |
| 1970 | 180.8 mm (7.1 in) |
| 1971 | 202.9 mm (8.0 in) |
| 1972 | 118.6 mm (4.7 in) |
| 1973 | 298.6 mm (11.8 in) |
| 1974 | 149.1 mm (5.9 in) |
| 1975 | 114.6 mm (4.5 in) |
| 1976 | 109.0 mm (4.3 in) |
| 1977 | 99.7 mm (3.9 in) |
| 1978 | 89.9 mm (3.5 in) |
| 1979 | 180.3 mm (7.1 in) |
| 1980 | 118.6 mm (4.7 in) |
| 1981 | 110.8 mm (4.4 in) |
| 1982 | 116.1 mm (4.6 in) |
| 1983 | 109.7 mm (4.3 in) |
| 1984 | 79.9 mm (3.1 in) |
| 1985 | 98.6 mm (3.9 in) |
| 1986 | 90.9 mm (3.6 in) |
| 1987 | 117.1 mm (4.6 in) |
| 1988 | 74.2 mm (2.9 in) |
| 1989 | 139.8 mm (5.5 in) |
| 1990 | 265.5 mm (10.5 in) |
| 1991 | 211.8 mm (8.3 in) |
| 1992 | 144.3 mm (5.7 in) |
| 1993 | 141.5 mm (5.6 in) |
| 1994 | 162.4 mm (6.4 in) |
| 1995 | 166.6 mm (6.6 in) |
| 1996 | 80.4 mm (3.2 in) |
| 1997 | 120.2 mm (4.7 in) |
| 1998 | 120.4 mm (4.7 in) |
| 1999 | 139.2 mm (5.5 in) |
| 2000 | 134.1 mm (5.3 in) |
| 2001 | 128.0 mm (5.0 in) |
| 2002 | 75.4 mm (3.0 in) |
| 2003 | 121.2 mm (4.8 in) |
| 2004 | 86.0 mm (3.4 in) |
| 2005 | 121.7 mm (4.8 in) |
| 2006 | 137.2 mm (5.4 in) |
| 2007 | 92.5 mm (3.6 in) |
| 2008 | 87.4 mm (3.4 in) |
| 2009 | 80.5 mm (3.2 in) |
| 2010 | 112.7 mm (4.4 in) |
| 2011 | 121.2 mm (4.8 in) |
| 2012 | 105.9 mm (4.2 in) |
| 2013 | 134.2 mm (5.3 in) |
| 2014 | 93.4 mm (3.7 in) |
| 2015 | 564.7 mm (22.2 in) |
| 2016 | 199.1 mm (7.8 in) |
| 2017 | 90.7 mm (3.6 in) |
| 2018 | 131.9 mm (5.2 in) |
| 2019 | 77.7 mm (3.1 in) |
| 2020 | 187.5 mm (7.4 in) |
| 2021 | 114.1 mm (4.5 in) |
| 2022 | 108.0 mm (4.3 in) |
| 2023 | 147.3 mm (5.8 in) |
| 2024 | 185.7 mm (7.3 in) |
| 2025 | 127.3 mm (5.0 in) |
| 2026 | 57.4 mm (2.3 in) |
Longest dry spell (CDD)
| Year | Longest dry spell (CDD) |
|---|---|
| 1901 | 9 days |
| 1902 | 18 days |
| 1903 | 13 days |
| 1904 | 15 days |
| 1905 | 25 days |
| 1906 | 21 days |
| 1907 | n/a |
| 1913 | 18 days |
| 1929 | 10 days |
| 1930 | 22 days |
| 1931 | 27 days |
| 1932 | 17 days |
| 1933 | 38 days |
| 1934 | 18 days |
| 1935 | 25 days |
| 1936 | 24 days |
| 1937 | 22 days |
| 1938 | 22 days |
| 1939 | 29 days |
| 1940 | 30 days |
| 1941 | 27 days |
| 1942 | 33 days |
| 1943 | 21 days |
| 1944 | 19 days |
| 1945 | 13 days |
| 1946 | 15 days |
| 1947 | 17 days |
| 1948 | 16 days |
| 1949 | 21 days |
| 1950 | 20 days |
| 1951 | 23 days |
| 1952 | 25 days |
| 1953 | 20 days |
| 1954 | 24 days |
| 1955 | 19 days |
| 1956 | 21 days |
| 1957 | 15 days |
| 1958 | 24 days |
| 1959 | 18 days |
| 1960 | 16 days |
| 1961 | 34 days |
| 1962 | 26 days |
| 1963 | 20 days |
| 1964 | 25 days |
| 1965 | 16 days |
| 1966 | 22 days |
| 1967 | 25 days |
| 1968 | 25 days |
| 1969 | 28 days |
| 1970 | 34 days |
| 1971 | 20 days |
| 1972 | 24 days |
| 1973 | 27 days |
| 1974 | 40 days |
| 1975 | 20 days |
| 1976 | 44 days |
| 1977 | 22 days |
| 1978 | 24 days |
| 1979 | 19 days |
| 1980 | 23 days |
| 1981 | 23 days |
| 1982 | 12 days |
| 1983 | 27 days |
| 1984 | 25 days |
| 1985 | 21 days |
| 1986 | 31 days |
| 1987 | 25 days |
| 1988 | 17 days |
| 1989 | 18 days |
| 1990 | 17 days |
| 1991 | 23 days |
| 1992 | 18 days |
| 1993 | 21 days |
| 1994 | 15 days |
| 1995 | 18 days |
| 1996 | 14 days |
| 1997 | 16 days |
| 1998 | 26 days |
| 1999 | 30 days |
| 2000 | 39 days |
| 2001 | 39 days |
| 2002 | 20 days |
| 2003 | 15 days |
| 2004 | 15 days |
| 2005 | 35 days |
| 2006 | 18 days |
| 2007 | 26 days |
| 2008 | 13 days |
| 2009 | 17 days |
| 2010 | 28 days |
| 2011 | 15 days |
| 2012 | 26 days |
| 2013 | 23 days |
| 2014 | 18 days |
| 2015 | 15 days |
| 2016 | 22 days |
| 2017 | 25 days |
| 2018 | 22 days |
| 2019 | 24 days |
| 2020 | 14 days |
| 2021 | 22 days |
| 2022 | 18 days |
| 2023 | 19 days |
| 2024 | 27 days |
| 2025 | 19 days |
| 2026 | 35 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
80 years with a frostAcross 80 years with a frost, the median last spring frost at Sumter falls on 24 March and the median first autumn frost on 8 November, which leaves a median of 227 days between them.
In 1990 to 2025 the median growing season was 232 days. That is 8 days more than in 1930 to 1969.
Fitted over all years, the growing season changes by +1.4 days per decade at this station.
| Measure | Median, all years | Earliest period (1930 to 1969) | Recent period (1990 to 2025) | Recent against earliest | Fitted trend |
|---|---|---|---|---|---|
| Last spring frost | 24 March | 25 March | 25 March | no change | -0.4 days per decade |
| First autumn frost | 8 November | 4 November | 13 November | 9 days later | +1.0 days per decade |
| Growing days | 227 days | 224 days | 232 days | 8 days more | +1.4 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
92 years, 1906 to 2024A day with at least 75.9 mm (3.0 in) of rain is expected about once in 2 years. A day with at least 273.1 mm (10.8 in) of rain is expected about once in 100 years.
| Expected about once in | A day with at least | Note |
|---|---|---|
| 2 years | 75.9 mm (3.0 in) | |
| 5 years | 107.5 mm (4.2 in) | |
| 10 years | 135.0 mm (5.3 in) | |
| 25 years | 179.7 mm (7.1 in) | |
| 50 years | 221.8 mm (8.7 in) | |
| 100 years | 273.1 mm (10.8 in) | Longer than the 92 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, 92 years of values from 1906 to 2024.
A return level is an estimate. It is least reliable for the long periods, 50 and 100 years, and for any period longer than the record behind the fit, where the fit has to reach past the largest day actually observed. It is not a forecast.
The largest wettest-day totals in the fit: 271.0 mm (10.7 in) in 2015; 220.5 mm (8.7 in) in 1945; 208.5 mm (8.2 in) in 1990.
Station Changes
1 suspectedOne change was suspected in the annual mean temperature of Sumter, at 1981. Each is measured against neighbouring stations.
- Relative to 5 neighbouring stations, the station's annual mean temperature from 1981 ran 0.5 C (0.8 F) lower than in the years before (possible change).
| Year | Shift (C) | Shift (F) | Strength | Neighbours |
|---|---|---|---|---|
| 1981 | -0.5 | -0.8 | 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
2008 to 2025 against 1961 to 1990Over 2008 to 2025, Sumter had a mean temperature of 17.0 C (62.5 F) and 1,235.2 mm (48.6 in) of rain a year. The 3 stations whose 1961 to 1990 climate was closest to that are Forsyth 6 NNW (United States, 349 km away), Little Mtn (United States, 103 km away) and Newberry (United States, 124 km away).
| Twin station | Country | Distance away | Mean temperature, 1961-1990 | Rain a year, 1961-1990 | Climate difference |
|---|---|---|---|---|---|
| Forsyth 6 NNW | United States | 349 km (217 mi) | 17.0 C (62.5 F) | 1,255.0 mm (49.4 in) | 0.41 |
| Little Mtn | United States | 103 km (64 mi) | 17.0 C (62.6 F) | 1,232.4 mm (48.5 in) | 0.43 |
| Newberry | United States | 124 km (77 mi) | 16.8 C (62.3 F) | 1,237.2 mm (48.7 in) | 0.44 |
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 2026-10-16 (16 October 2026). Records are computed by this site and are not official.
Data as of . Last revised (2026-10-16).