Summerville Climate by Month
Summerville, South Carolina, United States
Hot summers and cool winters, with rain spread through the year.
Hot summers and cool winters, with rain spread through the year: that's Summerville's climate in short. Afternoon highs range from 60°F (15°C) in January to 92°F (33°C) in July, and January nights average 37°F (3°C). About 52 in (1324 mm) of rain falls in a typical year, with no clear rainy season.
- Warmest month
- 92°F(33°C)
- Average high, July
- Coldest nights
- 37°F(3°C)
- Average low, January
- Rain per year
- 52 in(1324 mm)
- No clear rainy season
- Humidity
- 70%
- Sunniest: May
Best and worst months in Summerville
Best for weatherThe most comfortable weather comes in April, October and November, with highs around 75°F (24°C) and about 3.3 in (83 mm) of rain a month.
Least pleasantJuly and August are the least pleasant; July is the hottest, with highs of 92°F (33°C).
Comfort combines how close the afternoon high is to 75°F (24°C) with how much rain falls and how humid it is. See where the weather is best in April.
Temperature and rain through the year
Highs and lows (°F)
Average highAverage low
Rain (in per month)
Summerville weather by month
| Month | High | Low | Rain | Humidity | Sun |
|---|---|---|---|---|---|
| JanJanuary | 60°F(15°C) | 37°F(3°C) | 3.7 in(94 mm) | 69% | 2.7 |
| FebFebruary | 64°F(18°C) | 40°F(4°C) | 3.2 in(81 mm) | 61% | 3.3 |
| MarMarch | 71°F(21°C) | 46°F(8°C) | 3.8 in(96 mm) | 61% | 4.5 |
| AprAprilBest | 78°F(25°C) | 52°F(11°C) | 3.7 in(95 mm) | 67% | 5.6 |
| MayMay | 84°F(29°C) | 60°F(16°C) | 3.4 in(87 mm) | 70% | 6.3 |
| JunJune | 89°F(32°C) | 68°F(20°C) | 6.1 in(155 mm) | 75% | 6.1 |
| JulJuly | 92°F(33°C) | 71°F(22°C) | 6.4 in(162 mm) | 73% | 6.2 |
| AugAugust | 90°F(32°C) | 71°F(22°C) | 6.7 in(170 mm) | 76% | 5.5 |
| SepSeptember | 86°F(30°C) | 66°F(19°C) | 5.4 in(136 mm) | 75% | 4.6 |
| OctOctoberBest | 78°F(26°C) | 55°F(13°C) | 3.5 in(88 mm) | 71% | 3.7 |
| NovNovemberBest | 69°F(21°C) | 45°F(7°C) | 2.6 in(66 mm) | 69% | 3.0 |
| DecDecember | 63°F(17°C) | 40°F(4°C) | 3.7 in(94 mm) | 70% | 2.4 |
1991–2020 averages. Sun is solar radiation in kWh/m² per day. Highlighted: the most comfortable months.
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