St Simons Island weather by month

Check out St Simons Island weather averages by month. Compare detailed monthly climate statistics including temperature, rainfall and sunshine figures.

Temperature in St Simons Island (°C)

  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Max temperature (daytime)
16°C maximum daytime temperature in January in St Simons Island16
17°C maximum daytime temperature in February in St Simons Island17
21°C maximum daytime temperature in March in St Simons Island21
24°C maximum daytime temperature in April in St Simons Island24
28°C maximum daytime temperature in May in St Simons Island28
30°C maximum daytime temperature in June in St Simons Island30
32°C maximum daytime temperature in July in St Simons Island32
31°C maximum daytime temperature in August in St Simons Island31
29°C maximum daytime temperature in September in St Simons Island29
25°C maximum daytime temperature in October in St Simons Island25
21°C maximum daytime temperature in November in St Simons Island21
18°C maximum daytime temperature in December in St Simons Island18
Min temperature (night-time)
5°C minimum night-time temperature in January in St Simons Island5
6°C minimum night-time temperature in February in St Simons Island6
10°C minimum night-time temperature in March in St Simons Island10
14°C minimum night-time temperature in April in St Simons Island14
18°C minimum night-time temperature in May in St Simons Island18
22°C minimum night-time temperature in June in St Simons Island22
23°C minimum night-time temperature in July in St Simons Island23
23°C minimum night-time temperature in August in St Simons Island23
22°C minimum night-time temperature in September in St Simons Island22
16°C minimum night-time temperature in October in St Simons Island16
11°C minimum night-time temperature in November in St Simons Island11
7°C minimum night-time temperature in December in St Simons Island7
Heat & Humidity
No heat & humidity in January in St Simons Island0
No heat & humidity in February in St Simons Island0
No heat & humidity in March in St Simons Island0
No heat & humidity in April in St Simons Island0
Moderate heat & humidity in May in St Simons IslandM
High heat & humidity in June in St Simons IslandH
Very high heat & humidity in July in St Simons IslandVH
Very high heat & humidity in August in St Simons IslandVH
High heat & humidity in September in St Simons IslandH
Low heat & humidity in October in St Simons IslandL
No heat & humidity in November in St Simons Island0
No heat & humidity in December in St Simons Island0
Sea temperature
18°C sea temperature in January in St Simons Island18
17°C sea temperature in February in St Simons Island17
16°C sea temperature in March in St Simons Island16
19°C sea temperature in April in St Simons Island19
23°C sea temperature in May in St Simons Island23
27°C sea temperature in June in St Simons Island27
28°C sea temperature in July in St Simons Island28
28°C sea temperature in August in St Simons Island28
27°C sea temperature in September in St Simons Island27
24°C sea temperature in October in St Simons Island24
21°C sea temperature in November in St Simons Island21
18°C sea temperature in December in St Simons Island18

Note: 0 = None, L = Low, M = Moderate, H = High, VH = Very high, E = Extreme

Sunshine & Daylight in St Simons Island

  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Daily hours of sunshine
Daily hours of daylight
10 hours of daylight per day in January in St Simons Island10
11 hours of daylight per day in February in St Simons Island11
12 hours of daylight per day in March in St Simons Island12
13 hours of daylight per day in April in St Simons Island13
14 hours of daylight per day in May in St Simons Island14
14 hours of daylight per day in June in St Simons Island14
14 hours of daylight per day in July in St Simons Island14
13 hours of daylight per day in August in St Simons Island13
12 hours of daylight per day in September in St Simons Island12
11 hours of daylight per day in October in St Simons Island11
11 hours of daylight per day in November in St Simons Island11
10 hours of daylight per day in December in St Simons Island10
UV Index (Maximum)
UV (maximum) index 4 (Moderate) in January in St Simons Island4
UV (maximum) index 5 (Moderate) in February in St Simons Island5
UV (maximum) index 7 (High) in March in St Simons Island7
UV (maximum) index 9 (Very High) in April in St Simons Island9
UV (maximum) index 10 (Very High) in May in St Simons Island10
UV (maximum) index 11 (Extreme) in June in St Simons Island11
UV (maximum) index 11 (Extreme) in July in St Simons Island11
UV (maximum) index 10 (Very High) in August in St Simons Island10
UV (maximum) index 9 (Very High) in September in St Simons Island9
UV (maximum) index 7 (High) in October in St Simons Island7
UV (maximum) index 4 (Moderate) in November in St Simons Island4
UV (maximum) index 4 (Moderate) in December in St Simons Island4

Rainfall in St Simons Island

  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Number of days with some rain
9 days with some rainfall in January in St Simons Island9
8 days with some rainfall in February in St Simons Island8
8 days with some rainfall in March in St Simons Island8
7 days with some rainfall in April in St Simons Island7
8 days with some rainfall in May in St Simons Island8
12 days with some rainfall in June in St Simons Island12
14 days with some rainfall in July in St Simons Island14
14 days with some rainfall in August in St Simons Island14
11 days with some rainfall in September in St Simons Island11
8 days with some rainfall in October in St Simons Island8
6 days with some rainfall in November in St Simons Island6
8 days with some rainfall in December in St Simons Island8
Average monthly rainfall (mm)
85 mm monthly rainfall in January in St Simons Island85
91 mm monthly rainfall in February in St Simons Island91
100 mm monthly rainfall in March in St Simons Island100
69 mm monthly rainfall in April in St Simons Island69
89 mm monthly rainfall in May in St Simons Island89
130 mm monthly rainfall in June in St Simons Island130
149 mm monthly rainfall in July in St Simons Island149
169 mm monthly rainfall in August in St Simons Island169
179 mm monthly rainfall in September in St Simons Island179
90 mm monthly rainfall in October in St Simons Island90
66 mm monthly rainfall in November in St Simons Island66
72 mm monthly rainfall in December in St Simons Island72

More about St Simons Island

St Simons Island by month

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

Recommended for Georgia

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The climate guide for Georgia (USA) (St Simons Island) shows long term monthly weather averages processed from data supplied by CRU (University of East Anglia), the Met Office & the Netherlands Meteorological Institute. Find out more about our data sources.

What's the climate like in St Simons Island?

St Simons Island has a temperate climate with hot summers and some rainfall in all months.

Metric (°C / mm)  |  Imperial (°F / inches)

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Tropical storm risk: St Simons Island, Georgia (USA) hurricane season

% of month affected by tropical storms
0
0
0
0
0
2.4%
1.6%
3.1%
4.2%
1.5%
0
0
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec

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More about the USA

Compare St Simons Island with the USA

Below the St Simons Island chart shows average maximum daytime temperature for St Simons Island, Georgia, USA and the USA (Washington).

Maximum daytime temperature (°C)

St Simons Island, Georgia, USA
USA (Washington)
16
5
17
7
21
13
24
19
28
24
30
29
32
31
31
30
29
26
25
20
21
14
18
8
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec

Metric (°C / mm)  |  Imperial (°F / inches)

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