Charleston Weather Blog

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

Thursday: One more reasonably warm day before possible record heat this weekend

/ June 24, 2026 at 5:51 PM

Another quiet day is on tap for Thursday with high pressure in control. Lows bottom out in the low 70s, warming to around 90° in the afternoon. Dry air (for this time of year, anyway) will hang on for one more day, though it will be a bit more humid than it was on Wednesday. High pressure and warm air aloft should keep a lid on thunderstorms for one more day as well.

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Rest of the work week: Warm, then turning warmer

/ June 23, 2026 at 10:46 PM

Generally normal summer weather continues for the rest of the work week, with a bit of an uptick in temperature as we head into Friday and the weekend.

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Tuesday: Seasonably warm with a few afternoon storms

/ June 22, 2026 at 9:41 PM

Standard summertime fare continues in the forecast for Tuesday with seasonably warm temperatures and a few afternoon thunderstorms. We’ll start the day on the warm side of normal ahead of a stalling cold front, with lows in the mid-to-upper 70s. The record warm low temperature at the airport for June 23 is 78°, set in 2024, and we may get close to that. From there, we’ll warm into the low 90s, but dewpoints in the low 70s will drive heat indices to around 100° at peak heating. We should see a few storms fire along and head of the seabreeze in the afternoon, though the convection-allowing models are rather sparse with coverage. If storms get going, there are some indications that a pocket of dry air in the mid-levels could help produce some gusty winds in addition to the usual heavy rain and lightning threat, so be alert for possible special weather statements or even warnings.

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The week ahead: Summertime heat, humidity, and storms

/ June 21, 2026 at 11:29 PM

Weather worthy of the summer solstice will continue this week with highs in the 90s and a shot at afternoon thunderstorms each day.

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Friday & the weekend: Stormy start, then getting a little quieter

/ at 7:32 PM

Unsettled weather continues as the remnants of short-lived Tropical Storm Arthur move across GA and South Carolina late tonight into early Friday. From there, more typical summertime weather sets in.

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