Block Island weather by month

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

Temperature
Rainfall
Sunshine & UV index

Temperature in Block Island (°C)

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Max temperature (daytime)	3	3	7	13	18	23	26	26	22	17	11	5
Min temperature (night-time)	-6	-5	-1	4	9	14	18	17	13	8	3	-3
Heat & Humidity	0	0	0	0	0	0	L	L	0	0	0	0
Sea temperature	6	4	4	6	10	15	19	20	19	16	12	9

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

Sunshine & UV index in Block Island

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Daily hours of sunshine	6	7	8	8	9	9	9	8	8	7	5	5
Daily hours of daylight	10	11	12	13	15	15	15	14	12	11	10	9
UV Index (Maximum)	2	2	4	6	7	8	8	8	6	4	2	1

Rainfall in Block Island

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Number of days with some rain	11	9	11	10	11	10	9	9	9	8	10	11
Average monthly rainfall (mm)	102	93	113	107	98	80	81	105	97	91	124	116

More about Block Island

Block Island by month

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

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The climate guide for Rhode Island (Block 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 Block Island?

Block Island has a cold climate with warm summers and some rainfall in all months.

Block Island weather in January

Expect daytime maximum temperatures of 3°C in Block Island, Rhode Island in January based on long-term weather averages. There are 6 hours of sunshine per day on average with 11 days with some rainfall and typically 102 mm of rainfall in the month, which might fall as snow.

3
3°C max day temperature
6
6 hours of sunshine per day
11
11 days with some rainfall
-6
-6°C min night temperature
10
10 hours of daylight per day
0
No heat & humidity
102
102 mm of monthly rainfall
2
2 (Low) UV index
6
6°C sea temperature

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Block Island weather in February

Expect daytime maximum temperatures of 3°C in Block Island, Rhode Island in February based on long-term weather averages. There are 7 hours of sunshine per day on average with typically 93 mm of rainfall in the month, which might fall as snow.

3
3°C max day temperature
7
7 hours of sunshine per day
9
9 days with some rainfall
-5
-5°C min night temperature
11
11 hours of daylight per day
0
No heat & humidity
93
93 mm of monthly rainfall
2
2 (Low) UV index
4
4°C sea temperature

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Block Island weather in March

Expect daytime maximum temperatures of 7°C in Block Island, Rhode Island in March based on long-term weather averages. There are 8 hours of sunshine per day on average with 11 days with some rainfall and typically 113 mm of rainfall in the month.

7
7°C max day temperature
8
8 hours of sunshine per day
11
11 days with some rainfall
-1
-1°C min night temperature
12
12 hours of daylight per day
0
No heat & humidity
113
113 mm of monthly rainfall
4
4 (Moderate) UV index
4
4°C sea temperature

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Block Island weather in April

Expect daytime maximum temperatures of 13°C in Block Island, Rhode Island in April based on long-term weather averages. There are 8 hours of sunshine per day on average with 10 days with some rainfall and typically 107 mm of rainfall in the month.

13
13°C max day temperature
8
8 hours of sunshine per day
10
10 days with some rainfall
4
4°C min night temperature
13
13 hours of daylight per day
0
No heat & humidity
107
107 mm of monthly rainfall
6
6 (High) UV index
6
6°C sea temperature

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Block Island weather in May

Expect daytime maximum temperatures of 18°C in Block Island, Rhode Island in May based on long-term weather averages. There are 9 hours of sunshine per day on average with 11 days with some rainfall and typically 98 mm of rainfall in the month.

18
18°C max day temperature
9
9 hours of sunshine per day
11
11 days with some rainfall
9
9°C min night temperature
15
15 hours of daylight per day
0
No heat & humidity
98
98 mm of monthly rainfall
7
7 (High) UV index
10
10°C sea temperature

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Block Island weather in June

Expect daytime maximum temperatures of 23°C in Block Island, Rhode Island in June based on long-term weather averages. There are 9 hours of sunshine per day on average with 10 days with some rainfall and typically 80 mm of rainfall in the month.

23
23°C max day temperature
9
9 hours of sunshine per day
10
10 days with some rainfall
14
14°C min night temperature
15
15 hours of daylight per day
0
No heat & humidity
80
80 mm of monthly rainfall
8
8 (Very High) UV index
15
15°C sea temperature

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Block Island weather in July

Expect daytime maximum temperatures of 26°C in Block Island, Rhode Island in July based on long-term weather averages. There are 9 hours of sunshine per day on average with typically 81 mm of rainfall in the month.

26
26°C max day temperature
9
9 hours of sunshine per day
9
9 days with some rainfall
18
18°C min night temperature
15
15 hours of daylight per day
L
Low heat & humidity
81
81 mm of monthly rainfall
8
8 (Very High) UV index
19
19°C sea temperature

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Block Island weather in August

Expect daytime maximum temperatures of 26°C in Block Island, Rhode Island in August based on long-term weather averages. There are 8 hours of sunshine per day on average with typically 105 mm of rainfall in the month.

26
26°C max day temperature
8
8 hours of sunshine per day
9
9 days with some rainfall
17
17°C min night temperature
14
14 hours of daylight per day
L
Low heat & humidity
105
105 mm of monthly rainfall
8
8 (Very High) UV index
20
20°C sea temperature

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Block Island weather in September

Expect daytime maximum temperatures of 22°C in Block Island, Rhode Island in September based on long-term weather averages. There are 8 hours of sunshine per day on average with typically 97 mm of rainfall in the month.

22
22°C max day temperature
8
8 hours of sunshine per day
9
9 days with some rainfall
13
13°C min night temperature
12
12 hours of daylight per day
0
No heat & humidity
97
97 mm of monthly rainfall
6
6 (High) UV index
19
19°C sea temperature

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Block Island weather in October

Expect daytime maximum temperatures of 17°C in Block Island, Rhode Island in October 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
8
8°C min night temperature
11
11 hours of daylight per day
0
No heat & humidity
91
91 mm of monthly rainfall
4
4 (Moderate) UV index
16
16°C sea temperature

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Block Island weather in November

Expect daytime maximum temperatures of 11°C in Block Island, Rhode Island in November based on long-term weather averages. There are 5 hours of sunshine per day on average with 10 days with some rainfall and typically 124 mm of rainfall in the month.

11
11°C max day temperature
5
5 hours of sunshine per day
10
10 days with some rainfall
3
3°C min night temperature
10
10 hours of daylight per day
0
No heat & humidity
124
124 mm of monthly rainfall
2
2 (Low) UV index
12
12°C sea temperature

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Block Island weather in December

Expect daytime maximum temperatures of 5°C in Block Island, Rhode Island in December based on long-term weather averages. There are 5 hours of sunshine per day on average with 11 days with some rainfall and typically 116 mm of rainfall in the month, which might fall as snow.