Historical weather data, all-time temperature records, and monthly climate averages for Summerville, SC. Explore typical weather conditions by week for trip planning, and see how today compares to the historical record.
April 5th in Summerville typically feels like a genuine taste of spring, with average highs of 75° and lows around 50°. There's only a 1-in-4 chance of rain today, and snow is off the table entirely. The date has seen some wild swings, though — from a balmy 91° back in 1946 to a teeth-chattering 33° in 1961.
Summerville's weather history has some real extremes on the books — the mercury once hit 107° in September 1925, and bottomed out at -5° in February 1899. The area is also no stranger to serious rainfall, with a staggering 10.23 inches falling in a single August day in 1940. And while snow is rare here, a 15-inch dump in February 1973 proved the Lowcountry isn't entirely immune to winter.
Summerville is firmly in the hot, humid South — highs climb to 90° by late July and stay in the upper 80s through August. If you're heat-averse, January through March is your window, with highs in the 60s and the most comfortable conditions of the year. Late July and early August bring the heaviest rain, so pack accordingly if you're visiting at peak summer.