Connecticut weather by month

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

  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Maximum daytime temperature °C
1°C maximum daytime temperature in January in Hartford1
2°C maximum daytime temperature in February in Hartford2
8°C maximum daytime temperature in March in Hartford8
15°C maximum daytime temperature in April in Hartford15
21°C maximum daytime temperature in May in Hartford21
26°C maximum daytime temperature in June in Hartford26
28°C maximum daytime temperature in July in Hartford28
28°C maximum daytime temperature in August in Hartford28
23°C maximum daytime temperature in September in Hartford23
18°C maximum daytime temperature in October in Hartford18
11°C maximum daytime temperature in November in Hartford11
3°C maximum daytime temperature in December in Hartford3
Hours of sunshine (daily)
Days with some rainfall
11 days with some rainfall in January in Hartford11
10 days with some rainfall in February in Hartford10
11 days with some rainfall in March in Hartford11
11 days with some rainfall in April in Hartford11
12 days with some rainfall in May in Hartford12
11 days with some rainfall in June in Hartford11
9 days with some rainfall in July in Hartford9
10 days with some rainfall in August in Hartford10
9 days with some rainfall in September in Hartford9
8 days with some rainfall in October in Hartford8
11 days with some rainfall in November in Hartford11
12 days with some rainfall in December in Hartford12

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Connecticut by month

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

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The climate guide for Connecticut (Hartford) 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.

Top Connecticut destinations

Below are average maximum temperatures at popular countries, regions and places in Connecticut for next month - February. Select a destination to see the climate guide for all months of the year.

All Connecticut destinations

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

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Connecticut weather averages

Temperature in Connecticut (°C)

  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Max temperature (daytime)
1°C maximum daytime temperature in January in Connecticut (Hartford)1
2°C maximum daytime temperature in February in Connecticut (Hartford)2
8°C maximum daytime temperature in March in Connecticut (Hartford)8
15°C maximum daytime temperature in April in Connecticut (Hartford)15
21°C maximum daytime temperature in May in Connecticut (Hartford)21
26°C maximum daytime temperature in June in Connecticut (Hartford)26
28°C maximum daytime temperature in July in Connecticut (Hartford)28
28°C maximum daytime temperature in August in Connecticut (Hartford)28
23°C maximum daytime temperature in September in Connecticut (Hartford)23
18°C maximum daytime temperature in October in Connecticut (Hartford)18
11°C maximum daytime temperature in November in Connecticut (Hartford)11
3°C maximum daytime temperature in December in Connecticut (Hartford)3
Min temperature (night-time)
-9°C minimum night-time temperature in January in Connecticut (Hartford)-9
-7°C minimum night-time temperature in February in Connecticut (Hartford)-7
-2°C minimum night-time temperature in March in Connecticut (Hartford)-2
3°C minimum night-time temperature in April in Connecticut (Hartford)3
8°C minimum night-time temperature in May in Connecticut (Hartford)8
13°C minimum night-time temperature in June in Connecticut (Hartford)13
17°C minimum night-time temperature in July in Connecticut (Hartford)17
16°C minimum night-time temperature in August in Connecticut (Hartford)16
11°C minimum night-time temperature in September in Connecticut (Hartford)11
5°C minimum night-time temperature in October in Connecticut (Hartford)5
0°C minimum night-time temperature in November in Connecticut (Hartford)0
-6°C minimum night-time temperature in December in Connecticut (Hartford)-6
Heat & Humidity
No heat & humidity in January in Connecticut (Hartford)0
No heat & humidity in February in Connecticut (Hartford)0
No heat & humidity in March in Connecticut (Hartford)0
No heat & humidity in April in Connecticut (Hartford)0
No heat & humidity in May in Connecticut (Hartford)0
Low heat & humidity in June in Connecticut (Hartford)L
Moderate heat & humidity in July in Connecticut (Hartford)M
Moderate heat & humidity in August in Connecticut (Hartford)M
No heat & humidity in September in Connecticut (Hartford)0
No heat & humidity in October in Connecticut (Hartford)0
No heat & humidity in November in Connecticut (Hartford)0
No heat & humidity in December in Connecticut (Hartford)0

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

Sunshine & UV index in Connecticut

  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 Connecticut (Hartford)10
11 hours of daylight per day in February in Connecticut (Hartford)11
12 hours of daylight per day in March in Connecticut (Hartford)12
13 hours of daylight per day in April in Connecticut (Hartford)13
15 hours of daylight per day in May in Connecticut (Hartford)15
15 hours of daylight per day in June in Connecticut (Hartford)15
15 hours of daylight per day in July in Connecticut (Hartford)15
14 hours of daylight per day in August in Connecticut (Hartford)14
12 hours of daylight per day in September in Connecticut (Hartford)12
11 hours of daylight per day in October in Connecticut (Hartford)11
10 hours of daylight per day in November in Connecticut (Hartford)10
9 hours of daylight per day in December in Connecticut (Hartford)9
UV Index (Maximum)
UV (maximum) index 1 (Low) in January in Connecticut (Hartford)1
UV (maximum) index 2 (Low) in February in Connecticut (Hartford)2
UV (maximum) index 4 (Moderate) in March in Connecticut (Hartford)4
UV (maximum) index 6 (High) in April in Connecticut (Hartford)6
UV (maximum) index 7 (High) in May in Connecticut (Hartford)7
UV (maximum) index 8 (Very High) in June in Connecticut (Hartford)8
UV (maximum) index 8 (Very High) in July in Connecticut (Hartford)8
UV (maximum) index 8 (Very High) in August in Connecticut (Hartford)8
UV (maximum) index 6 (High) in September in Connecticut (Hartford)6
UV (maximum) index 4 (Moderate) in October in Connecticut (Hartford)4
UV (maximum) index 2 (Low) in November in Connecticut (Hartford)2
UV (maximum) index 1 (Low) in December in Connecticut (Hartford)1

Rainfall in Connecticut

  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 Connecticut (Hartford)11
10 days with some rainfall in February in Connecticut (Hartford)10
11 days with some rainfall in March in Connecticut (Hartford)11
11 days with some rainfall in April in Connecticut (Hartford)11
12 days with some rainfall in May in Connecticut (Hartford)12
11 days with some rainfall in June in Connecticut (Hartford)11
9 days with some rainfall in July in Connecticut (Hartford)9
10 days with some rainfall in August in Connecticut (Hartford)10
9 days with some rainfall in September in Connecticut (Hartford)9
8 days with some rainfall in October in Connecticut (Hartford)8
11 days with some rainfall in November in Connecticut (Hartford)11
12 days with some rainfall in December in Connecticut (Hartford)12
Average monthly rainfall (mm)
84 mm monthly rainfall in January in Connecticut (Hartford)84
79 mm monthly rainfall in February in Connecticut (Hartford)79
92 mm monthly rainfall in March in Connecticut (Hartford)92
100 mm monthly rainfall in April in Connecticut (Hartford)100
101 mm monthly rainfall in May in Connecticut (Hartford)101
95 mm monthly rainfall in June in Connecticut (Hartford)95
88 mm monthly rainfall in July in Connecticut (Hartford)88
93 mm monthly rainfall in August in Connecticut (Hartford)93
95 mm monthly rainfall in September in Connecticut (Hartford)95
90 mm monthly rainfall in October in Connecticut (Hartford)90
100 mm monthly rainfall in November in Connecticut (Hartford)100
97 mm monthly rainfall in December in Connecticut (Hartford)97

Tropical storm risk: Connecticut hurricane season

% of month affected by tropical storms
0
0
0
0
0
0
0
1.2%
1.3%
0
0
0
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec

Compare Connecticut weather with the UK

The weather chart below compares the average monthly maximum daytime temperature for Connecticut, USA (Hartford) and the UK (London).

Maximum daytime temperature (°C)

Connecticut, USA (Hartford)
UK (London)
1
7
2
7
8
10
15
13
21
17
26
20
28
22
28
22
23
19
18
15
11
10
3
8
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec

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

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