Charleston Weather Blog

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

Tuesday: On & off storms keep temperatures below 90°

/ at 8:48 PM

Showers and thunderstorms will feature prominently in the forecast on Tuesday as they develop around a stalled boundary lingering to the south. Periods of heavy rain will be possible, and an area or two of freshwater flooding can’t be totally ruled out. However, severe weather is unlikely, and this will largely be a beneficial rainfall event. Even better, highs should peak below 90° for the first time since June 24. So, even though there will be rain, it’ll be awfully nice to not be baking.

The main flooding concern arrives with the evening high tide; minor to moderate coastal flooding will be possible between 7-10 PM. We’ll need to monitor where the rain is carefully; any rain that coincides will cause issues downtown.

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The week ahead: Unsettled start with fewer heat advisories

/ July 12, 2026 at 11:35 PM

After a week of consecutive heat headlines, whether they be Heat Advisories or Extreme Heat Warnings, a front dropping in from the north — and the accompanying unsettled weather — will take the edge off the heat for at least a few days.

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