Charleston Weather Blog

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

Friday & the weekend: Rain clears out ahead of a nice weekend

/ December 18, 2025 at 10:40 PM

A front will sweep away the dreary and damp Thursday, yielding a much nicer Friday with much more sunshine. We’ll start the day in the mid-50s with some cloud cover still hanging around, but that should depart by midday. Temperatures will warm to the mid-to-upper 60s with breezy westerly winds, which will be gusty early in the day, peaking in the 20-25 MPH range. Winds will gradually slacken some as the day goes on, though.

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Rest of the work week: Clouds and rain return, but clear out ahead of a nice weekend

/ December 16, 2025 at 9:24 PM

We’ll continue to put Monday’s cold snap in the rear view on Wednesday as temperatures continue to trend warmer with high pressure moving eastward. Temperatures will fall to the mid-30s overnight, but increasing cloud cover should keep a lid on further radiational cooling and keep us above freezing. From there, we’ll warm into the low-to-mid-60s as the cloud deck continues to thicken courtesy of a coastal trough taking shape offshore.

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Tuesday: Another frigid start, but a warmer ahead

/ December 15, 2025 at 8:14 PM

While it won’t be as windy as it was on Monday morning, we still have quite a frigid start queued up for Tuesday as lows drop back to the low 20s in the morning, with some upper teens possible closer to and west of I-95. However, with high pressure beginning to slip to the east, we’ll start to see temperatures begin to moderate in the afternoon as mostly sunny skies prevail. While the forecast high of 54° remains well below normal for this point in December, it will feel tropical in comparison to Monday’s high of 39° at the airport (which ties the record cold high temperature first set in 1942).

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The week ahead: Bitter cold to start, but 60s return by midweek

/ December 14, 2025 at 10:07 PM

The well-advertised cold snap is underway as Arctic air pushes into the area, with air temperatures expected to fall to around 20° in the morning. While the most gusty winds should subside overnight, a 10-15 MPH breeze out of the north will continue to drive wind chills down well into the teens, with the potential for some brief sub-10° readings as well. A Cold Weather Advisory will run until 10am Monday to cover the most bitter cold, but it will still be a very chilly day with highs struggling to break 40° under mostly sunny skies. Winds will be slackening a little throughout the day, but still should be elevated enough to make it feel more like the mid-30s. Layer up and ensure pets, pipes, plants, and people are protected.

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