Charleston County (Charleston)
May
Weather in Charleston County, South Carolina for May 2026
Your guide to Charleston County weather in May - trends and predictions
Until now, May 2026 in Charleston County is cooler than usual, with temperatures averaging 21.3 °F, this is -3.7 °F below the typical seasonal average.
The forecast for the upcoming days in Charleston County predicts a temperature of 27.6 °F, which is slightly above the historical average.
In general, the average temperature in Charleston County at the beginning of May is 24.7 °F. As the month progressed, temperatures tended to significantly warm up, reaching an average of 29.1 °F by the end of May.
Charleston County in May brings notable rainfall, with an average of 20 rainy days and a total precipitation of 223.3 mm.
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Temperatures
Rain 🌧️
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11
Dry days
20
Rainy days
0
Snow days
28°/21°
Temperatures
19 km/h
Avg max wind
73 %
Avg humidity
Charleston County Weather May
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Temperatures trend during May in Charleston County
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May weather in Charleston County day by day
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| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| May 1 |  Patchy rain possible | 24° /18° | 2.8 mm | 5 | |
| May 2 |  Partly cloudy | 24° /16° | 9.2 mm | 5 | |
| May 3 | Partly cloudy | 24° /16° | 0 mm | 8 | |
| May 4 | Light rain shower | 24° /18° | 6.7 mm | 7 | |
| May 5 | Light rain shower | 26° /18° | 1.9 mm | 8 | |
| May 6 | Partly cloudy | 26° /19° | 1.9 mm | 8 | |
| May 7 | Patchy rain possible | 25° /20° | 5.4 mm | 6 | |
| May 8 |  Mist | 26° /18° | 0 mm | 7 | |
| May 9 |  Heavy rain at times | 26° /20° | 4.4 mm | 7 | |
| May 10 | Light rain shower | 25° /19° | 8.5 mm | 6 | |
| May 11 |  Moderate rain | 29° /21° | 7.4 mm | 9.4 | |
| May 12 | Moderate rain | 20° /17° | 8.3 mm | 3.7 | |
| May 13 | Partly cloudy | 25° /18° | 0.1 mm | 6.4 | |
| May 14 | Patchy rain possible | 26° /19° | 0.8 mm | 8.4 | |
| May 15 |  Sunny | 26° /15° | 0 mm | 0.6 | |
| May 16 | Sunny | 27° /20° | 0 mm | 6 | |
| May 17 | Sunny | 27° /21° | 0 mm | 6 | |
| May 18 | Patchy rain possible | 31° /22° | 0.1 mm | 6 | |
| May 19 | Sunny | 30° /22° | 0 mm | 7 | |
| May 20 | Sunny | 28° /22° | 0 mm | 6 | |
| May 21 | Partly cloudy | 30° /22° | 0 mm | 7 | |
| May 22 | Partly cloudy | 30° /23° | 0 mm | 7 | |
| May 23 | Partly cloudy | 29° /23° | 0 mm | 7 | |
| May 24 | Partly cloudy | 29° /23° | 0 mm | 7 | |
| May 25 | Patchy rain possible | 28° /21° | 15.7 mm | 6 | |
| May 26 | Partly cloudy | 28° /21° | 0.1 mm | 7 | |
| May 27 |  Thundery outbreaks possible | 29° /23° | 4.8 mm | 7 | |
| May 28 | Sunny | 31° /23° | 3.6 mm | 7 | |
| May 29 | Sunny | 30° /22° | 0 mm | 8 | |
| May 30 | Sunny | 29° /21° | 10.7 mm | 7 | |
| May 31 | Sunny | 29° /19° | 10.4 mm | 8 | |
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Important Notice
Our weather forecast for Charleston County in May is based on the analysis of historical data rather than real-time forecast models. While this provides a general overview, weather conditions can change. We recommend that you check the Charleston County forecast closer to your planned date for the most up-to-date weather information.
Change Month
Charleston County in May - FAQ
What are the expected maximum and minimum temperatures in Charleston County during May?
During May, expect a variety of temperatures with highs around 28° and lows near 21°, suitable for diverse activities and preferences.
How much rainfall should be expected in Charleston County during May?
Significant rainfall exceeding 223.3 mm is expected in Charleston County during May, occurring over more than 20 days. Preparing for wet conditions is recommended in your planning.
What are the typical wind conditions in Charleston County during May?
The average wind speed in Charleston County during May is 19 km/h, suggesting breezy to windy conditions, depending on your activities.
May rainfall patterns in Charleston County
Explore the daily rainfall trends and prepare for Charleston Countys May weather 💧
Typically, Charleston County has 20 rainy days in May with a total of 223.3 mm of rainfall.
UV exposure in Charleston County during May
Stay informed about UV levels for safe outdoor activities throughout the month of May ☀️
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Where is Charleston County?Get accurate weather forecasts for Charleston County, located at latitude 32.777 and longitude -79.931. Stay updated with localized weather information tailored for Charleston County.
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