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 (°F)

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Max temperature (daytime)	37	37	45	55	64	73	79	79	72	63	52	41
Min temperature (night-time)	21	23	30	39	48	57	64	63	55	46	37	27
Heat & Humidity	0	0	0	0	0	0	L	L	0	0	0	0
Sea temperature	43	39	39	43	50	59	66	68	66	61	54	48

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 (inches)	4.0	3.7	4.4	4.2	3.9	3.1	3.2	4.1	3.8	3.6	4.9	4.6

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 37°F 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 4.0 inches of rainfall in the month, which might fall as snow.

37
37°F max day temperature
6
6 hours of sunshine per day
11
11 days with some rainfall
21
21°F min night temperature
10
10 hours of daylight per day
0
No heat & humidity
4.0
4.0 inches of monthly rainfall
2
2 (Low) UV index
43
43°F sea temperature

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Block Island weather in February

Expect daytime maximum temperatures of 37°F 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 3.7 inches of rainfall in the month, which might fall as snow.

37
37°F max day temperature
7
7 hours of sunshine per day
9
9 days with some rainfall
23
23°F min night temperature
11
11 hours of daylight per day
0
No heat & humidity
3.7
3.7 inches of monthly rainfall
2
2 (Low) UV index
39
39°F sea temperature

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Block Island weather in March

Expect daytime maximum temperatures of 45°F 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 4.4 inches of rainfall in the month.

45
45°F max day temperature
8
8 hours of sunshine per day
11
11 days with some rainfall
30
30°F min night temperature
12
12 hours of daylight per day
0
No heat & humidity
4.4
4.4 inches of monthly rainfall
4
4 (Moderate) UV index
39
39°F sea temperature

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Block Island weather in April

Expect daytime maximum temperatures of 55°F 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 4.2 inches of rainfall in the month.

55
55°F max day temperature
8
8 hours of sunshine per day
10
10 days with some rainfall
39
39°F min night temperature
13
13 hours of daylight per day
0
No heat & humidity
4.2
4.2 inches of monthly rainfall
6
6 (High) UV index
43
43°F sea temperature

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Block Island weather in May

Expect daytime maximum temperatures of 64°F 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 3.9 inches of rainfall in the month.

64
64°F max day temperature
9
9 hours of sunshine per day
11
11 days with some rainfall
48
48°F min night temperature
15
15 hours of daylight per day
0
No heat & humidity
3.9
3.9 inches of monthly rainfall
7
7 (High) UV index
50
50°F sea temperature

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Block Island weather in June

Expect daytime maximum temperatures of 73°F 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 3.1 inches of rainfall in the month.

73
73°F max day temperature
9
9 hours of sunshine per day
10
10 days with some rainfall
57
57°F min night temperature
15
15 hours of daylight per day
0
No heat & humidity
3.1
3.1 inches of monthly rainfall
8
8 (Very High) UV index
59
59°F sea temperature

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Block Island weather in July

Expect daytime maximum temperatures of 79°F 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 3.2 inches of rainfall in the month.

79
79°F max day temperature
9
9 hours of sunshine per day
9
9 days with some rainfall
64
64°F min night temperature
15
15 hours of daylight per day
L
Low heat & humidity
3.2
3.2 inches of monthly rainfall
8
8 (Very High) UV index
66
66°F sea temperature

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Block Island weather in August

Expect daytime maximum temperatures of 79°F 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 4.1 inches of rainfall in the month.

79
79°F max day temperature
8
8 hours of sunshine per day
9
9 days with some rainfall
63
63°F min night temperature
14
14 hours of daylight per day
L
Low heat & humidity
4.1
4.1 inches of monthly rainfall
8
8 (Very High) UV index
68
68°F sea temperature

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Block Island weather in September

Expect daytime maximum temperatures of 72°F 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 3.8 inches of rainfall in the month.

72
72°F max day temperature
8
8 hours of sunshine per day
9
9 days with some rainfall
55
55°F min night temperature
12
12 hours of daylight per day
0
No heat & humidity
3.8
3.8 inches of monthly rainfall
6
6 (High) UV index
66
66°F sea temperature

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Block Island weather in October

Expect daytime maximum temperatures of 63°F 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 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
46
46°F min night temperature
11
11 hours of daylight per day
0
No heat & humidity
3.6
3.6 inches of monthly rainfall
4
4 (Moderate) UV index
61
61°F sea temperature

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Block Island weather in November

Expect daytime maximum temperatures of 52°F 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 4.9 inches of rainfall in the month.

52
52°F max day temperature
5
5 hours of sunshine per day
10
10 days with some rainfall
37
37°F min night temperature
10
10 hours of daylight per day
0
No heat & humidity
4.9
4.9 inches of monthly rainfall
2
2 (Low) UV index
54
54°F sea temperature

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Block Island weather in December

Expect daytime maximum temperatures of 41°F 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 4.6 inches of rainfall in the month, which might fall as snow.