Weather in St. Simons Island: May
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Average day temperature: | 81.9°F |
| Average night temperature: | 69.2°F | |
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Sea water temperature: | 76.0°F |
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Number of sunny days: | 13 days |
| Day length: | 13.4 - 14.0 hours | |
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Number of rainy days: | 2 days |
| Precipitation totals: | 0.9 in. | |
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forecast
| St. Simons Island |
temperature
| St. Simons Island |
Air temperature in May, °F
The highest day temperature during May of 2026 was 88°F. At the same time the lowest night temperature was 54°F. Daily and nightly averages during May were 80.0°F and 70.6°F.
Sea water temperature in St. Simons Island in May, °F
The average sea water temperature in May of 2026 was 76.2°F. The highest and lowest sea temperatures during the month were 82.8°F and 70.9°F.
Mostly all days in May are sunny but cloudy days are also possible.
Precipitation total in May, in.
Precipitation total value in St. Simons Island in May is 0.9 in. Other months of the year show relatively similar values.
The average wind speed value in May is 6.3 mph It makes May one of the least windy months of the year.
This chart shows average number of hours during the day when sunlight can reach the ground. It depends on day length and cloudiness during the day. The average number of sunny hours in May is: 8.7.
Best time for vacation in St. Simons Island
St. Simons Island on a weather map
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