Summerville, SC climate
Summerville has mild winters and hot summers, with plenty of rain. A typical July afternoon reaches 92°, a January night drops to 37°, and snow is almost unheard of.
NOAA 1991-2020 climate normals Updated once a decadeWhat a year in Summerville feels like
Winter
Spring
Summer
Fall
Summerville weather by month
Average highs, lows, rain and snow for every month, from NOAA’s 1991–2020 normals.
| Month | High | Low | Rain + melt | Snow | Wet days | Snow on ground | 30-yr range |
|---|---|---|---|---|---|---|---|
| January | 60° | 37° | 3.4" | 0 | 8 | 0 | 43° – 55° |
| February | 63° | 39° | 3.2" | 0.3" | 8 | 0 | 44° – 60° |
| March | 70° | 45° | 3.5" | 0 | 8 | 0 | 52° – 64° |
| April | 77° | 52° | 3.3" | 0 | 7 | 0 | 60° – 69° |
| May | 84° | 61° | 3.4" | 0 | 7 | 0 | 68° – 77° |
| June | 89° | 68° | 5.7" | 0 | 10 | 0 | 74° – 83° |
| July | 92° | 72° | 5.8" | 0 | 10 | 0 | 80° – 85° |
| August | 90° | 71° | 6.3" | 0 | 12 | 0 | 78° – 83° |
| September | 86° | 66° | 5.1" | 0 | 8 | 0 | 73° – 81° |
| October | 78° | 55° | 4.2" | 0 | 7 | 0 | 62° – 71° |
| November | 69° | 45° | 2.9" | 0 | 6 | 0 | 52° – 63° |
| December | 62° | 40° | 3.4" | 0 | 8 | 0 | 42° – 62° |
| Year | 77° | 54° | 50.3" | 0.3" | 97 | 0 |
“Wet days” have at least 0.01" of rain or melted snow. “Snow on ground” counts days with 1" or more. The 30-year range is the coldest and warmest that month’s average temperature got between 1991 and 2020.
Rain and snow in Summerville
Summerville gets 50 inches of rain and melted snow a year. August is the wettest month and November the driest. Rain or snow falls on about 97 days a year.
About 238 frost-free days a year
In half of years the last 32° night comes by March 22 and the first one by November 12. That leaves about 238 frost-free days for gardens, longer than 88% of U.S. towns.
Heating and cooling a home in Summerville
Engineers use “degree days” to estimate how hard a furnace or air conditioner works. In Summerville, 55% of that work is heating and 45% is cooling.
Degree days measure how far each day’s average temperature falls below or rises above 65°, added up over a year. Source: NOAA station normals.
Summerville and its neighbors
Summerville borders 2 towns with climate data. January nights across them vary by 1.0°. Lincolnville has both the coldest January nights (37°) and the hottest July afternoons (92°). Summerville’s January low is 37° and its July high 92°.
Temperatures and rain come from NOAA’s 5 km grid, so each town gets its own value.
How Summerville compares
Compared with every U.S. town and city on TownTapestry, each counted once.
Warmer than it used to be
The last 30 years in Summerville averaged 1.3° warmer than the 1900s. The biggest change is in December (+2.6°). The shift is larger than in 55% of U.S. towns.
Change by month1991–2020 average minus 1901–2000 average, at Summerville’s spot on NOAA’s grid
How much a month can swing
A normal is an average, and real years wander around it. December swings the most: between 1991 and 2020 its average temperature ranged from 42° to 62°. July is the most reliable, staying within 5°.
Common questions about Summerville’s climate
What is the coldest month in Summerville?
January, with a typical high of 60° and a low of 37°.
What is the hottest month in Summerville?
July, with a typical high of 92° and a low of 72°. About 72 days a year reach 90°.
How much snow does Summerville get?
Almost none. A normal year brings 0.3 inches.
When is the first frost in Summerville?
In half of years the first 32° night comes by November 12, and the last spring frost by March 22.
What is the rainiest month in Summerville?
August, with 6.3 inches of rain and melted snow. The year totals 50 inches.
Temperatures and rainfall come from NOAA’s gridded climate normals for Summerville itself (about a 3-mile square). Snow, frost dates and day counts come from NOAA’s weather station at Givhans Ferry 2 Ese, SC (10 mi, snow) and Summerville 4w, SC (4 mi, frost, heat and degree days). Normals are 30-year averages, not a forecast. Source: NOAA NCEI U.S. Climate Normals, 1991–2020 and 1901–2000.