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 (°F)

  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Max temperature (daytime)
61°F maximum daytime temperature in January in St Simons Island61
63°F maximum daytime temperature in February in St Simons Island63
70°F maximum daytime temperature in March in St Simons Island70
75°F maximum daytime temperature in April in St Simons Island75
82°F maximum daytime temperature in May in St Simons Island82
86°F maximum daytime temperature in June in St Simons Island86
90°F maximum daytime temperature in July in St Simons Island90
88°F maximum daytime temperature in August in St Simons Island88
84°F maximum daytime temperature in September in St Simons Island84
77°F maximum daytime temperature in October in St Simons Island77
70°F maximum daytime temperature in November in St Simons Island70
64°F maximum daytime temperature in December in St Simons Island64
Min temperature (night-time)
41°F minimum night-time temperature in January in St Simons Island41
43°F minimum night-time temperature in February in St Simons Island43
50°F minimum night-time temperature in March in St Simons Island50
57°F minimum night-time temperature in April in St Simons Island57
64°F minimum night-time temperature in May in St Simons Island64
72°F minimum night-time temperature in June in St Simons Island72
73°F minimum night-time temperature in July in St Simons Island73
73°F minimum night-time temperature in August in St Simons Island73
72°F minimum night-time temperature in September in St Simons Island72
61°F minimum night-time temperature in October in St Simons Island61
52°F minimum night-time temperature in November in St Simons Island52
45°F minimum night-time temperature in December in St Simons Island45
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
64°F sea temperature in January in St Simons Island64
63°F sea temperature in February in St Simons Island63
61°F sea temperature in March in St Simons Island61
66°F sea temperature in April in St Simons Island66
73°F sea temperature in May in St Simons Island73
81°F sea temperature in June in St Simons Island81
82°F sea temperature in July in St Simons Island82
82°F sea temperature in August in St Simons Island82
81°F sea temperature in September in St Simons Island81
75°F sea temperature in October in St Simons Island75
70°F sea temperature in November in St Simons Island70
64°F sea temperature in December in St Simons Island64

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 (inches)
3.3 inches monthly rainfall in January in St Simons Island3.3
3.6 inches monthly rainfall in February in St Simons Island3.6
3.9 inches monthly rainfall in March in St Simons Island3.9
2.7 inches monthly rainfall in April in St Simons Island2.7
3.5 inches monthly rainfall in May in St Simons Island3.5
5.1 inches monthly rainfall in June in St Simons Island5.1
5.9 inches monthly rainfall in July in St Simons Island5.9
6.7 inches monthly rainfall in August in St Simons Island6.7
7.0 inches monthly rainfall in September in St Simons Island7.0
3.5 inches monthly rainfall in October in St Simons Island3.5
2.6 inches monthly rainfall in November in St Simons Island2.6
2.8 inches monthly rainfall in December in St Simons Island2.8

More about St Simons Island

St Simons Island by month

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

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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)  |  Imperial (°F)

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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 (°F)

St Simons Island, Georgia, USA
USA (Washington)
61
41
63
45
70
55
75
66
82
75
86
84
90
88
88
86
84
79
77
68
70
57
64
46
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec

Metric (°C)  |  Imperial (°F)

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