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
Rainfall
Sunshine & UV index

Temperature in St Simons Island (°C)

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Max temperature (daytime)	16	17	21	24	28	30	32	31	29	25	21	18
Min temperature (night-time)	5	6	10	14	18	22	23	23	22	16	11	7
Heat & Humidity	0	0	0	0	M	H	VH	VH	H	L	0	0
Sea temperature	18	17	16	19	23	27	28	28	27	24	21	18

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

Sunshine & UV index in St Simons Island

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Daily hours of sunshine	6	7	8	9	10	9	9	8	7	7	7	6
Daily hours of daylight	10	11	12	13	14	14	14	13	12	11	11	10
UV Index (Maximum)	4	5	7	9	10	11	11	10	9	7	4	4

Rainfall in St Simons Island

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Number of days with some rain	9	8	8	7	8	12	14	14	11	8	6	8
Average monthly rainfall (mm)	85	91	100	69	89	130	149	169	179	90	66	72

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.

St Simons Island weather in January

Expect daytime maximum temperatures of 16°C in St Simons Island, Georgia (USA) in January based on long-term weather averages. There are 6 hours of sunshine per day on average with typically 85 mm of rainfall in the month.

16
16°C max day temperature
6
6 hours of sunshine per day
9
9 days with some rainfall
5
5°C min night temperature
10
10 hours of daylight per day
0
No heat & humidity
85
85 mm of monthly rainfall
4
4 (Moderate) UV index
18
18°C sea temperature

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St Simons Island weather in February

Expect daytime maximum temperatures of 17°C in St Simons Island, Georgia (USA) in February based on long-term weather averages. There are 7 hours of sunshine per day on average with typically 91 mm of rainfall in the month.

17
17°C max day temperature
7
7 hours of sunshine per day
8
8 days with some rainfall
6
6°C min night temperature
11
11 hours of daylight per day
0
No heat & humidity
91
91 mm of monthly rainfall
5
5 (Moderate) UV index
17
17°C sea temperature

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St Simons Island weather in March

Expect daytime maximum temperatures of 21°C in St Simons Island, Georgia (USA) in March based on long-term weather averages. There are 8 hours of sunshine per day on average with typically 100 mm of rainfall in the month.

21
21°C max day temperature
8
8 hours of sunshine per day
8
8 days with some rainfall
10
10°C min night temperature
12
12 hours of daylight per day
0
No heat & humidity
100
100 mm of monthly rainfall
7
7 (High) UV index
16
16°C sea temperature

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St Simons Island weather in April

Expect daytime maximum temperatures of 24°C in St Simons Island, Georgia (USA) in April based on long-term weather averages. There are 9 hours of sunshine per day on average with typically 69 mm of rainfall in the month.

24
24°C max day temperature
9
9 hours of sunshine per day
7
7 days with some rainfall
14
14°C min night temperature
13
13 hours of daylight per day
0
No heat & humidity
69
69 mm of monthly rainfall
9
9 (Very High) UV index
19
19°C sea temperature

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St Simons Island weather in May

Expect daytime maximum temperatures of 28°C in St Simons Island, Georgia (USA) in May based on long-term weather averages. There are 10 hours of sunshine per day on average with typically 89 mm of rainfall in the month.

28
28°C max day temperature
10
10 hours of sunshine per day
8
8 days with some rainfall
18
18°C min night temperature
14
14 hours of daylight per day
M
Moderate heat & humidity
89
89 mm of monthly rainfall
10
10 (Very High) UV index
23
23°C sea temperature

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St Simons Island weather in June

Expect daytime maximum temperatures of 30°C in St Simons Island, Georgia (USA) in June and high heat and humidity based on long-term weather averages. There are 9 hours of sunshine per day on average with 12 days with some rainfall and typically 130 mm of rainfall in the month.

30
30°C max day temperature
9
9 hours of sunshine per day
12
12 days with some rainfall
22
22°C min night temperature
14
14 hours of daylight per day
H
High heat & humidity
130
130 mm of monthly rainfall
11
11 (Extreme) UV index
27
27°C sea temperature

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St Simons Island weather in July

Expect daytime maximum temperatures of 32°C in St Simons Island, Georgia (USA) in July and very high heat and humidity based on long-term weather averages. There are 9 hours of sunshine per day on average with 14 days with some rainfall and typically 149 mm of rainfall in the month.

32
32°C max day temperature
9
9 hours of sunshine per day
14
14 days with some rainfall
23
23°C min night temperature
14
14 hours of daylight per day
VH
Very High heat & humidity
149
149 mm of monthly rainfall
11
11 (Extreme) UV index
28
28°C sea temperature

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St Simons Island weather in August

Expect daytime maximum temperatures of 31°C in St Simons Island, Georgia (USA) in August and very high heat and humidity based on long-term weather averages. There are 8 hours of sunshine per day on average with 14 days with some rainfall and typically 169 mm of rainfall in the month.

31
31°C max day temperature
8
8 hours of sunshine per day
14
14 days with some rainfall
23
23°C min night temperature
13
13 hours of daylight per day
VH
Very High heat & humidity
169
169 mm of monthly rainfall
10
10 (Very High) UV index
28
28°C sea temperature

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St Simons Island weather in September

Expect daytime maximum temperatures of 29°C in St Simons Island, Georgia (USA) in September and high heat and humidity based on long-term weather averages. There are 7 hours of sunshine per day on average with 11 days with some rainfall and typically 179 mm of rainfall in the month.

29
29°C max day temperature
7
7 hours of sunshine per day
11
11 days with some rainfall
22
22°C min night temperature
12
12 hours of daylight per day
H
High heat & humidity
179
179 mm of monthly rainfall
9
9 (Very High) UV index
27
27°C sea temperature

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St Simons Island weather in October

Expect daytime maximum temperatures of 25°C in St Simons Island, Georgia (USA) in October based on long-term weather averages. There are 7 hours of sunshine per day on average with typically 90 mm of rainfall in the month.

25
25°C max day temperature
7
7 hours of sunshine per day
8
8 days with some rainfall
16
16°C min night temperature
11
11 hours of daylight per day
L
Low heat & humidity
90
90 mm of monthly rainfall
7
7 (High) UV index
24
24°C sea temperature

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St Simons Island weather in November

Expect daytime maximum temperatures of 21°C in St Simons Island, Georgia (USA) in November based on long-term weather averages. There are 7 hours of sunshine per day on average with typically 66 mm of rainfall in the month.

21
21°C max day temperature
7
7 hours of sunshine per day
6
6 days with some rainfall
11
11°C min night temperature
11
11 hours of daylight per day
0
No heat & humidity
66
66 mm of monthly rainfall
4
4 (Moderate) UV index
21
21°C sea temperature

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St Simons Island weather in December

Expect daytime maximum temperatures of 18°C in St Simons Island, Georgia (USA) in December based on long-term weather averages. There are 6 hours of sunshine per day on average with typically 72 mm of rainfall in the month.