Charleston Weather Blog

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

The week ahead: A reprieve from the heat is coming

/ May 18, 2025 at 11:09 PM

The week ahead starts with a continuation of the abnormally warm temperatures we’ve been feeling for the better part of the past week, though some relief is in sight as a cold front brings cooler and drier air to close out the week and head into Memorial Day Weekend.

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Weekend forecast: Remaining hot with low storm chances

/ May 16, 2025 at 7:36 PM

Hot weather continues as we head into the weekend with only a slight chance at some thunderstorm-induced relief.

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Friday & the weekend: Abnormally warm temperatures expected

/ May 15, 2025 at 11:52 PM

The main weather story for Friday and the weekend will be the unusual midsummer-like heat, especially Friday and Saturday. We may break a record high on Friday — the record high is 94° set in 1941 — as temperatures head into the mid-90s under partly cloudy to mostly sunny skies. Heat indices will peak around 100° or so — not into heat advisory territory but still on the high side for mid-May.

Partly cloudy skies continue into Saturday, though a stalling front could pop a stray storm or two especially further north. Otherwise, expect another quiet and very warm day, with highs in the mid-90s once again expected after a low-70s start. The front meanders around the area on Sunday, keeping partly cloudy skies in the forecast with a stray storm not out of the question. Temperatures should run a touch “cooler” — and by “cooler” I mean around 90° as opposed to 95°.

The 90s stick around well into next week before the next front approaches by mid-week with the next mentionable shower and thunderstorm chances.

Thursday: First 90s of the year expected

/ May 14, 2025 at 7:41 PM

Wednesday was the warmest day thus far of 2025, with a high of 89° recorded at the airport. This distinction will be short-lived as high pressure continues to build in on Thursday, sending us to what should be our first 90° readings of the year in the afternoon. Mostly sunny skies are expected to prevail, so be sure to apply sunscreen if you are headed outside for a little pre-summer preview.

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Rest of the work week: One more day of storms, then the heat builds in

/ May 13, 2025 at 10:56 PM

We have one more day of scattered storms in store as low pressure aloft opens up into a trough and interacts with the seabreeze in the afternoon. Once again, we get off to a very mild start with lows in the upper 60s expected. Temperatures will head to the mid-80s before scattered storms initiate along and ahead of the seabreeze. Some brief downpours will be possible, but not expecting a repeat of what we saw this past weekend, either.

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