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 (°F)

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Max temperature (daytime)	61	63	70	75	82	86	90	88	84	77	70	64
Min temperature (night-time)	41	43	50	57	64	72	73	73	72	61	52	45
Heat & Humidity	0	0	0	0	M	H	VH	VH	H	L	0	0
Sea temperature	64	63	61	66	73	81	82	82	81	75	70	64

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 (inches)	3.3	3.6	3.9	2.7	3.5	5.1	5.9	6.7	7.0	3.5	2.6	2.8

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.

St Simons Island weather in January

Expect daytime maximum temperatures of 61°F 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 3.3 inches of rainfall in the month.

61
61°F max day temperature
6
6 hours of sunshine per day
9
9 days with some rainfall
41
41°F min night temperature
10
10 hours of daylight per day
0
No heat & humidity
3.3
3.3 inches of monthly rainfall
4
4 (Moderate) UV index
64
64°F sea temperature

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St Simons Island weather in February

Expect daytime maximum temperatures of 63°F 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 3.6 inches of rainfall in the month.

63
63°F max day temperature
7
7 hours of sunshine per day
8
8 days with some rainfall
43
43°F min night temperature
11
11 hours of daylight per day
0
No heat & humidity
3.6
3.6 inches of monthly rainfall
5
5 (Moderate) UV index
63
63°F sea temperature

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St Simons Island weather in March

Expect daytime maximum temperatures of 70°F 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 3.9 inches of rainfall in the month.

70
70°F max day temperature
8
8 hours of sunshine per day
8
8 days with some rainfall
50
50°F min night temperature
12
12 hours of daylight per day
0
No heat & humidity
3.9
3.9 inches of monthly rainfall
7
7 (High) UV index
61
61°F sea temperature

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St Simons Island weather in April

Expect daytime maximum temperatures of 75°F 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 2.7 inches of rainfall in the month.

75
75°F max day temperature
9
9 hours of sunshine per day
7
7 days with some rainfall
57
57°F min night temperature
13
13 hours of daylight per day
0
No heat & humidity
2.7
2.7 inches of monthly rainfall
9
9 (Very High) UV index
66
66°F sea temperature

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St Simons Island weather in May

Expect daytime maximum temperatures of 82°F 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 3.5 inches of rainfall in the month.

82
82°F max day temperature
10
10 hours of sunshine per day
8
8 days with some rainfall
64
64°F min night temperature
14
14 hours of daylight per day
M
Moderate heat & humidity
3.5
3.5 inches of monthly rainfall
10
10 (Very High) UV index
73
73°F sea temperature

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St Simons Island weather in June

Expect daytime maximum temperatures of 86°F 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 5.1 inches of rainfall in the month.

86
86°F max day temperature
9
9 hours of sunshine per day
12
12 days with some rainfall
72
72°F min night temperature
14
14 hours of daylight per day
H
High heat & humidity
5.1
5.1 inches of monthly rainfall
11
11 (Extreme) UV index
81
81°F sea temperature

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St Simons Island weather in July

Expect daytime maximum temperatures of 90°F 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 5.9 inches of rainfall in the month.

90
90°F max day temperature
9
9 hours of sunshine per day
14
14 days with some rainfall
73
73°F min night temperature
14
14 hours of daylight per day
VH
Very High heat & humidity
5.9
5.9 inches of monthly rainfall
11
11 (Extreme) UV index
82
82°F sea temperature

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St Simons Island weather in August

Expect daytime maximum temperatures of 88°F 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 6.7 inches of rainfall in the month.

88
88°F max day temperature
8
8 hours of sunshine per day
14
14 days with some rainfall
73
73°F min night temperature
13
13 hours of daylight per day
VH
Very High heat & humidity
6.7
6.7 inches of monthly rainfall
10
10 (Very High) UV index
82
82°F sea temperature

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St Simons Island weather in September

Expect daytime maximum temperatures of 84°F 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 7.0 inches of rainfall in the month.

84
84°F max day temperature
7
7 hours of sunshine per day
11
11 days with some rainfall
72
72°F min night temperature
12
12 hours of daylight per day
H
High heat & humidity
7.0
7.0 inches of monthly rainfall
9
9 (Very High) UV index
81
81°F sea temperature

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St Simons Island weather in October

Expect daytime maximum temperatures of 77°F 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 3.5 inches of rainfall in the month.

77
77°F max day temperature
7
7 hours of sunshine per day
8
8 days with some rainfall
61
61°F min night temperature
11
11 hours of daylight per day
L
Low heat & humidity
3.5
3.5 inches of monthly rainfall
7
7 (High) UV index
75
75°F sea temperature

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St Simons Island weather in November

Expect daytime maximum temperatures of 70°F 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 2.6 inches of rainfall in the month.

70
70°F max day temperature
7
7 hours of sunshine per day
6
6 days with some rainfall
52
52°F min night temperature
11
11 hours of daylight per day
0
No heat & humidity
2.6
2.6 inches of monthly rainfall
4
4 (Moderate) UV index
70
70°F sea temperature

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St Simons Island weather in December

Expect daytime maximum temperatures of 64°F 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 2.8 inches of rainfall in the month.