Charleston Weather Blog

Forecast explanations, atmospheric science, and other cool weather-related stuff for Charleston, SC

Tuesday: Status quo prevails

/ July 14, 2025 at 11:13 PM

We’ve got more of the same in store weather-wise for Tuesday. We’ll start in the mid-70s (with even warmer temperatures near the coast), warming to about the low 90s again under partly cloudy skies. Dewpoints are still quite muggy, and those low 90s will feel more like 100° during the height of the afternoon. We’ll continue to see some drier air slot into the area, which should limit (but not completely stamp out) thunderstorm coverage along and ahead of the seabreeze. Some spots could see some heavy rain at times, but storm motions seem reasonably progressive so major flooding issues aren’t expected. Overall, just another summer day here in the Lowcountry.

The week ahead: More warmth, more afternoon storms

/ at 5:03 PM

Warm temperatures and afternoon thunderstorms will continue to figure prominently in the forecast this week with high pressure rebuilding aloft.

Read more »

Weekend forecast: Staying warm and stormy

/ July 11, 2025 at 11:00 PM

Plenty of heat and humidity continues as we head into the weekend, and this will lead to more afternoon thunderstorms (though perhaps not quite as many, especially Sunday). A ridge of high pressure aloft will nudge into the area from the west — enough to keep the heat on, but not quite enough to totally squelch the afternoon thunderstorm threat either. Temperatures will run in the mid-to-upper 70s each morning, warming to the low-to-mid-90s each afternoon. Showers and thunderstorms will initiate on the seabreeze as it pushes inland, though the prevailing flow around the ridge could send some storms back coastward — something to think about if the beach is in your plans. The ridge nudges in a bit more for Sunday, and that should help to keep the risk for thunderstorms a little lower than on Saturday, but either way, just be prepared to bring your outdoor activities indoors if thunderstorms approach.