Sumter, SC Weather & Climate Normals
Sumter's real weather, in one number
Sumter, SC scores 48/100 on this site's reading of NOAA's own 30-year normals: strongly seasonal. Comfortable weather is limited to a shorter window; summers, winters, or precipitation swing wide. 4 of the year's 12 months average between 55 and 75°F, the range this site counts as mild.
Sumter's hottest and coldest months
Sumter's hottest month is Jul, averaging 80°F; its coldest is Jan, averaging 44°F, a 35.9°F swing across the year, a middling gap by national standards.
Sumter's weather across the year
| Month | Avg high | Avg low | Precip | Snow |
|---|---|---|---|---|
| Jan | 55°F | 33°F | 3.78in | 0.3in |
| Feb | 59°F | 35°F | 3.47in | 0in |
| Mar | 66°F | 41°F | 3.67in | 0in |
| Apr | 75°F | 50°F | 3.4in | 0in |
| May | 81°F | 58°F | 3.78in | 0in |
| Jun | 87°F | 66°F | 5.05in | 0in |
| Jul | 90°F | 70°F | 5.75in | 0in |
| Aug | 89°F | 68°F | 4.92in | 0in |
| Sep | 83°F | 63°F | 4.36in | 0in |
| Oct | 74°F | 51°F | 3.88in | 0in |
| Nov | 65°F | 40°F | 2.94in | 0in |
| Dec | 57°F | 35°F | 3.83in | 0in |
Apr, May, Sep, and Oct are the best time to see Sumter at its mildest; the rest of the year, plan around Jul's heat and Jan's cold.
Rain and snow in Sumter
Sumter averages 48.83in of precipitation a year across roughly 117 days with measurable rain or snow, and 0.3in of snow a year.
Where Sumter ranks
Sumter ranks 2321 of 4876 US cities in this dataset for comfort score, and 31 of 66 within SC. About 42,958 people live there.
If you need tomorrow's forecast, not the 30-year average
Everything above is a 30-year average from Sumter, SC US, 2.2 miles from Sumter, not a prediction for any specific day.
More on how this is worked out
What a 30-year climate normal actually is · Why this uses the nearest NOAA station