Sumter, SC
Climate overview — based on NOAA 1991-2020 normals from SUMTER, SC US.
Year-round temperatures (°F)
Climate summary
Sumter has an annual average temperature of 62.1°F with about 48.8 inches of precipitation per year and 0.3 inches of snow. The warmest month is July (average high 90.2°F), and the coldest is January (average low 32.8°F). July is typically the wettest month (5.75 in) and November the driest (2.94 in). Snow typically falls from January through January.
Best time to visit Sumter
Full guide →Climate change signal
All-time records →19 of 366 (5.2%) of Sumter's all-time daily heat records have been set since 2015. If records were spread evenly across the station's history, only about 5% would fall in any given decade.
| 1900s | 31 | |
| 1910s | 1 | |
| 1920s | 1 | |
| 1930s | 56 | |
| 1940s | 85 | |
| 1950s | 44 | |
| 1960s | 21 | |
| 1970s | 25 | |
| 1980s | 37 | |
| 1990s | 27 | |
| 2000s | 19 | |
| 2010s | 7 | |
| 2020s | 12 |
Bars: number of all-time daily heat records still standing that were set in each decade.
Monthly averages
| Month | Avg High | Avg Low | Avg Temp | Precipitation | Snow | Rainy days |
|---|---|---|---|---|---|---|
| January | 55.1°F | 32.8°F | 43.9°F | 3.78 in | 0.3 in | 11 |
| February | 58.5°F | 35.0°F | 46.7°F | 3.47 in | — | 10 |
| March | 66.3°F | 40.9°F | 53.6°F | 3.67 in | — | 9 |
| April | 74.7°F | 49.6°F | 62.2°F | 3.40 in | — | 8 |
| May | 81.2°F | 57.8°F | 69.5°F | 3.78 in | — | 9 |
| June | 87.3°F | 65.9°F | 76.6°F | 5.05 in | — | 12 |
| July | 90.2°F | 69.6°F | 79.9°F | 5.75 in | — | 11 |
| August | 88.5°F | 68.4°F | 78.5°F | 4.92 in | — | 11 |
| September | 83.4°F | 62.9°F | 73.2°F | 4.36 in | — | 9 |
| October | 74.4°F | 50.9°F | 62.6°F | 3.88 in | — | 8 |
| November | 64.8°F | 40.0°F | 52.4°F | 2.94 in | — | 8 |
| December | 57.4°F | 35.0°F | 46.2°F | 3.83 in | — | 11 |
Climate twins of Sumter
Why these? →The most climatically similar US cities at least 140 miles away (by monthly temperature + precipitation pattern).