Columbia, SC September Weather: Showers Possible Monday Afternoon With Fall Thunder Threat

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Showers POSSIBLE
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Columbia residents may need umbrellas Monday as a weak system brings a slight chance of afternoon showers and storms across the Midlands. Drivers along I-26 should prepare for slick roads and reduced visibility if storms develop by late afternoon.

According to the National Weather Service in Columbia, a 20% chance of rain arrives after 2 p.m. Monday. Winds will turn north at 3 to 6 mph, with gusts possible near 20 mph during passing showers. Any storm could bring brief downpours and dangerous lightning.

Most of South Carolina stays mostly sunny through the morning hours Monday, with temperatures climbing to a seasonable high near 86 degrees. Clouds will build into the afternoon, setting the stage for the slight storm risk. Conditions calm by Monday night with partly cloudy skies and a low near 63.

The broader week looks warmer and drier as fall heat briefly returns. Tuesday will bring another slim chance of isolated showers, but skies turn mostly sunny by Wednesday. By Friday, highs push back toward 90 degrees, a reminder that summer still lingers despite the calendar shift.

Residents should keep phones charged for potential weather alerts and avoid outdoor activity during any thunder. Those traveling for work Monday should allow extra time on I-26, U.S. 378, and other key commuter routes in case of delays.

The next round of significant rain chances does not arrive until early next week, but forecasters stress conditions can change quickly. Updates will be issued as needed.

Five-Day Forecast for Columbia, SC:

  • Monday: Mostly sunny, slight chance of afternoon showers, high 86. Low 63.
  • Tuesday: Isolated showers, storm possible after 2 p.m., high 82. Low 62.
  • Wednesday: Mostly sunny, high 86. Low 64.
  • Thursday: Sunny, high 90. Low 66.
  • Friday: Mostly sunny and warmer, high near 91. Low 66.