Block Island climate guide

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Temperature in Block Island (°C)

  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Max temperature (daytime)
3°C maximum daytime temperature in January in Block Island3
3°C maximum daytime temperature in February in Block Island3
7°C maximum daytime temperature in March in Block Island7
13°C maximum daytime temperature in April in Block Island13
18°C maximum daytime temperature in May in Block Island18
23°C maximum daytime temperature in June in Block Island23
26°C maximum daytime temperature in July in Block Island26
26°C maximum daytime temperature in August in Block Island26
22°C maximum daytime temperature in September in Block Island22
17°C maximum daytime temperature in October in Block Island17
11°C maximum daytime temperature in November in Block Island11
5°C maximum daytime temperature in December in Block Island5
Min temperature (night-time)
-6°C minimum night-time temperature in January in Block Island-6
-5°C minimum night-time temperature in February in Block Island-5
-1°C minimum night-time temperature in March in Block Island-1
4°C minimum night-time temperature in April in Block Island4
9°C minimum night-time temperature in May in Block Island9
14°C minimum night-time temperature in June in Block Island14
18°C minimum night-time temperature in July in Block Island18
17°C minimum night-time temperature in August in Block Island17
13°C minimum night-time temperature in September in Block Island13
8°C minimum night-time temperature in October in Block Island8
3°C minimum night-time temperature in November in Block Island3
-3°C minimum night-time temperature in December in Block Island-3
Sea temperature
6°C sea temperature in January in Block Island6
4°C sea temperature in February in Block Island4
4°C sea temperature in March in Block Island4
6°C sea temperature in April in Block Island6
10°C sea temperature in May in Block Island10
15°C sea temperature in June in Block Island15
19°C sea temperature in July in Block Island19
20°C sea temperature in August in Block Island20
19°C sea temperature in September in Block Island19
16°C sea temperature in October in Block Island16
12°C sea temperature in November in Block Island12
9°C sea temperature in December in Block Island9

Sunshine & Daylight in Block 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 Block Island10
11 hours of daylight per day in February in Block Island11
12 hours of daylight per day in March in Block Island12
13 hours of daylight per day in April in Block Island13
15 hours of daylight per day in May in Block Island15
15 hours of daylight per day in June in Block Island15
15 hours of daylight per day in July in Block Island15
14 hours of daylight per day in August in Block Island14
12 hours of daylight per day in September in Block Island12
11 hours of daylight per day in October in Block Island11
10 hours of daylight per day in November in Block Island10
9 hours of daylight per day in December in Block Island9

Rainfall in Block Island

  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Number of days with some rain
11 days with some rainfall in January in Block Island11
9 days with some rainfall in February in Block Island9
11 days with some rainfall in March in Block Island11
10 days with some rainfall in April in Block Island10
11 days with some rainfall in May in Block Island11
10 days with some rainfall in June in Block Island10
9 days with some rainfall in July in Block Island9
9 days with some rainfall in August in Block Island9
9 days with some rainfall in September in Block Island9
8 days with some rainfall in October in Block Island8
10 days with some rainfall in November in Block Island10
11 days with some rainfall in December in Block Island11
Average monthly rainfall (mm)
102 mm monthly rainfall in January in Block Island102
93 mm monthly rainfall in February in Block Island93
113 mm monthly rainfall in March in Block Island113
107 mm monthly rainfall in April in Block Island107
98 mm monthly rainfall in May in Block Island98
80 mm monthly rainfall in June in Block Island80
81 mm monthly rainfall in July in Block Island81
105 mm monthly rainfall in August in Block Island105
97 mm monthly rainfall in September in Block Island97
91 mm monthly rainfall in October in Block Island91
124 mm monthly rainfall in November in Block Island124
116 mm monthly rainfall in December in Block Island116

More climate for Block Island

  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
UV Index (Maximum)
UV (maximum) index 2 (Low) in January in Block Island2
UV (maximum) index 2 (Low) in February in Block Island2
UV (maximum) index 4 (Moderate) in March in Block Island4
UV (maximum) index 6 (High) in April in Block Island6
UV (maximum) index 7 (High) in May in Block Island7
UV (maximum) index 8 (Very High) in June in Block Island8
UV (maximum) index 8 (Very High) in July in Block Island8
UV (maximum) index 8 (Very High) in August in Block Island8
UV (maximum) index 6 (High) in September in Block Island6
UV (maximum) index 4 (Moderate) in October in Block Island4
UV (maximum) index 2 (Low) in November in Block Island2
UV (maximum) index 1 (Low) in December in Block Island1
Heat & Humidity
No heat & humidity in January in Block Island0
No heat & humidity in February in Block Island0
No heat & humidity in March in Block Island0
No heat & humidity in April in Block Island0
No heat & humidity in May in Block Island0
No heat & humidity in June in Block Island0
Low heat & humidity in July in Block IslandL
Low heat & humidity in August in Block IslandL
No heat & humidity in September in Block Island0
No heat & humidity in October in Block Island0
No heat & humidity in November in Block Island0
No heat & humidity in December in Block Island0

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

What's the climate like in Block Island?

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

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

The climate guide for Block Island, Rhode 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.

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Metric (°C / mm)  |  Imperial (°F / inches)

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Below are average maximum temperatures at popular destinations in Rhode Island for next month - October. Select a destination to see the climate guide for all months of the year.

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