World Resorts USA St. Simons Island

St. Simons Island Monthly Weather Averages

Please click on any column to get detailed information about St. Simons Island weather in that particular month. You will get daily weather information for that month for the last several years.

Day & Night air temperature, °F

The warmest month in St. Simons Island is july. The average daily temp is 88.3°F. The average nightly temp is 77.3°F.

Sea water temperature, °F

The warmest sea temperature usually observed in August. Average daily sea water temperature during this month is 85.1°F.

Precipitation total, in.

October is the month with least precipitations during the year. The average precipitation totals for this month is 0.4 in. The month with most precipitation total is August.

Number of rainy days

This chart shows averages for the last three years. It shows medium and heavy rains only, it doesn't show light rains.

Wind speed, mph
Sunny, partly cloudy and cloudy days
Average sunny hours

Sunny hours are calculated based on the average daily number of hours while sunlight can reach the ground. It depends on day length and cloudiness during the day.

* Charts above show average data for the last 3 years.

Best time for vacation in St. Simons Island

Sunniest months:
October 15 days
January 14 days
March 14 days
Warmest months:
July 88.3 °F
August 86.9 °F
June 86.1 °F
Warmest sea temp:
August 85.1 °F
July 84.6 °F
September 82.0 °F
Coldest months:
January 59.8 °F
December 62.7 °F
February 64.8 °F
Rainiest months:
August 5 days
July 5 days
September 4 days
Windiest months:
December 6.7 mph
October 6.7 mph
January 6.7 mph

St. Simons Island on a weather map

St. Simons Island
+52°F
NW 3 mph
Feels like: +52°F
Precip.: 83%
Places in USA:
Name
°F
+30°F
+75°F
+75°F
+45°F
+55°F
+70°F
+77°F
+70°F
+23°F
+57°F
+48°F
+63°F
+63°F
+46°F
+5°F
24 Hours Forecast
St. Simons Island
Local time: 01:04
December 05, friday
0300
57°F
NW
6 mph
0600
59°F
N
6 mph
0900
61°F
NE
4 mph
1200
64°F
NE
5 mph
1500
63°F
NE
4 mph
1800
57°F
S
11 mph
2100
55°F
S
7 mph
December 06, saturday
0000
55°F
SE
4 mph
Units of measurement: °C / °F