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Climate · Sea Island

Sea Island in September

Hot and wet, as the days shorten.

Typical weather, averaged over 30 years

September in Sea Island is hot: highs near 86°F, lows near 75°F. Rain falls on about four days a week, less often as the month goes on, and the days shorten by 41 minutes from the first week to the last.September in Sea Island is hot: highs near 30°C, lows near 24°C. Rain falls on about four days a week, less often as the month goes on, and the days shorten by 41 minutes from the first week to the last.

High
86°F30°Caverage
Low
75°F24°Caverage
Wet days
4a week · 57% of days
Daylight
12h 18mon average

Is September a good time to visit Sea Island?

September sits outside Sea Island's best months, which run in two parts: March to April, or November. Expect hot days and rain on about four days a week.

How we judge it: every month is scored on how close its typical high comes to the range from 70°F to 80°F, how mild its nights are, and how rarely it rains. The best months are the run of months that scores best.How we judge it: every month is scored on how close its typical high comes to the range from 21°C to 27°C, how mild its nights are, and how rarely it rains. The best months are the run of months that scores best.

How September sits in the year

week by week

Temperature

Highs near 86°F in September, against 64°F to 90°F through the year.Highs near 30°C in September, against 18°C to 32°C through the year.

Chance of a wet day

57% of days in September, against 23% to 67% through the year.

Cloud cover

51% cover in September, against 38% to 58% through the year.

Daylight

12h 18m in September, against 10h 09m to 14h 08m through the year.

Week by week, lightly smoothed, with September shaded. The olive line marks the best months. Hover or tap a week for its figures.

Either side

  1. August89°32°low 77°low 25°5 wet days a weekRain on about five days a week.
  2. September86°30°low 75°low 24°4 wet days a weekRain on about four days a week.
  3. October81°27°low 68°low 20°2 wet days a weekRain on about two days a week.

Where Sea Island sits, in September

America/New York
this place
typical high in September 40°F4°C95°F35°C
Sunrise, mid-September
7:09 AMsets 7:33 PM
Above the sea
0 mlow-lying
Latitude
31.2°Nnorthern hemisphere
Nearest of ours
Bluffton126 km north

The land around Sea Island, shaded by its typical high in September, the planning map's own layer. Hover the map for the figure at that spot; tap it on a phone. Clock times are local, for the 15th.

Elsewhere in United States in September

high · low · wet days
See September on the planning mapThe whole year in Sea Island

Typical weather, averaged over 30 years (1995–2024), read 5 km north-west of Sea Island. Its own grid square is mostly sea and holds only a daily average, so the page reads the nearest square with a true high and low near the town's height. Temperatures are adjusted against 66 weather stations: daytime highs read about 3.1°F cold in the source data and are raised to match.Temperatures are adjusted against 66 weather stations: daytime highs read about 1.7°C cold in the source data and are raised to match. Daylight is calculated from latitude. Charts are lightly smoothed week to week; the figures in the table are not. Source: Copernicus ERA5-Land reanalysis; cloud cover from NASA's MERRA-2 reanalysis, on a coarser grid of about 50 km. Contains modified Copernicus Climate Change Service information 2026; neither the European Commission nor ECMWF is responsible for any use of it. These are averages, not a forecast.

Daylight is calculated from latitude. Charts are lightly smoothed week to week; the figures in the table are not.

Source: Copernicus ERA5-Land reanalysis; cloud cover from NASA's MERRA-2 reanalysis, on a coarser grid of about 50 km. Contains modified Copernicus Climate Change Service information 2026; neither the European Commission nor ECMWF is responsible for any use of it. These are averages, not a forecast.