Weather in Charleston, South Carolina for May 2026
Until now, May 2026 in Charleston 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 predicts a temperature of 27.6 °F, which is slightly above the historical average.
In general, the average temperature in Charleston 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 in May brings notable rainfall, with an average of 20 rainy days and a total precipitation of 223.3 mm.
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Charleston Weather May
Temperatures trend during May in Charleston
May weather in Charleston day by day
| 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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Charleston in May - FAQ
What are the expected maximum and minimum temperatures in Charleston during May?
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May rainfall patterns in Charleston
UV exposure in Charleston during May
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