New Haven weather by month

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

Temperature in New Haven (°C)

  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Max temperature (daytime)
2°C maximum daytime temperature in January in New Haven2
3°C maximum daytime temperature in February in New Haven3
8°C maximum daytime temperature in March in New Haven8
14°C maximum daytime temperature in April in New Haven14
19°C maximum daytime temperature in May in New Haven19
25°C maximum daytime temperature in June in New Haven25
27°C maximum daytime temperature in July in New Haven27
27°C maximum daytime temperature in August in New Haven27
23°C maximum daytime temperature in September in New Haven23
18°C maximum daytime temperature in October in New Haven18
12°C maximum daytime temperature in November in New Haven12
4°C maximum daytime temperature in December in New Haven4
Min temperature (night-time)
-6°C minimum night-time temperature in January in New Haven-6
-6°C minimum night-time temperature in February in New Haven-6
-2°C minimum night-time temperature in March in New Haven-2
3°C minimum night-time temperature in April in New Haven3
9°C minimum night-time temperature in May in New Haven9
14°C minimum night-time temperature in June in New Haven14
17°C minimum night-time temperature in July in New Haven17
17°C minimum night-time temperature in August in New Haven17
13°C minimum night-time temperature in September in New Haven13
7°C minimum night-time temperature in October in New Haven7
2°C minimum night-time temperature in November in New Haven2
-4°C minimum night-time temperature in December in New Haven-4
Heat & Humidity
No heat & humidity in January in New Haven0
No heat & humidity in February in New Haven0
No heat & humidity in March in New Haven0
No heat & humidity in April in New Haven0
No heat & humidity in May in New Haven0
Low heat & humidity in June in New HavenL
Moderate heat & humidity in July in New HavenM
Low heat & humidity in August in New HavenL
No heat & humidity in September in New Haven0
No heat & humidity in October in New Haven0
No heat & humidity in November in New Haven0
No heat & humidity in December in New Haven0
Sea temperature
4°C sea temperature in January in New Haven4
2°C sea temperature in February in New Haven2
3°C sea temperature in March in New Haven3
6°C sea temperature in April in New Haven6
11°C sea temperature in May in New Haven11
17°C sea temperature in June in New Haven17
21°C sea temperature in July in New Haven21
22°C sea temperature in August in New Haven22
21°C sea temperature in September in New Haven21
17°C sea temperature in October in New Haven17
12°C sea temperature in November in New Haven12
8°C sea temperature in December in New Haven8

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

Sunshine & Daylight in New Haven

  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 New Haven10
11 hours of daylight per day in February in New Haven11
12 hours of daylight per day in March in New Haven12
13 hours of daylight per day in April in New Haven13
15 hours of daylight per day in May in New Haven15
15 hours of daylight per day in June in New Haven15
15 hours of daylight per day in July in New Haven15
14 hours of daylight per day in August in New Haven14
12 hours of daylight per day in September in New Haven12
11 hours of daylight per day in October in New Haven11
10 hours of daylight per day in November in New Haven10
9 hours of daylight per day in December in New Haven9
UV Index (Maximum)
UV (maximum) index 2 (Low) in January in New Haven2
UV (maximum) index 2 (Low) in February in New Haven2
UV (maximum) index 4 (Moderate) in March in New Haven4
UV (maximum) index 6 (High) in April in New Haven6
UV (maximum) index 7 (High) in May in New Haven7
UV (maximum) index 8 (Very High) in June in New Haven8
UV (maximum) index 8 (Very High) in July in New Haven8
UV (maximum) index 8 (Very High) in August in New Haven8
UV (maximum) index 6 (High) in September in New Haven6
UV (maximum) index 4 (Moderate) in October in New Haven4
UV (maximum) index 2 (Low) in November in New Haven2
UV (maximum) index 1 (Low) in December in New Haven1

Rainfall in New Haven

  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Number of days with some rain
10 days with some rainfall in January in New Haven10
10 days with some rainfall in February in New Haven10
11 days with some rainfall in March in New Haven11
10 days with some rainfall in April in New Haven10
11 days with some rainfall in May in New Haven11
11 days with some rainfall in June in New Haven11
9 days with some rainfall in July in New Haven9
9 days with some rainfall in August in New Haven9
8 days with some rainfall in September in New Haven8
7 days with some rainfall in October in New Haven7
11 days with some rainfall in November in New Haven11
12 days with some rainfall in December in New Haven12
Average monthly rainfall (mm)
82 mm monthly rainfall in January in New Haven82
81 mm monthly rainfall in February in New Haven81
101 mm monthly rainfall in March in New Haven101
102 mm monthly rainfall in April in New Haven102
89 mm monthly rainfall in May in New Haven89
76 mm monthly rainfall in June in New Haven76
84 mm monthly rainfall in July in New Haven84
93 mm monthly rainfall in August in New Haven93
85 mm monthly rainfall in September in New Haven85
87 mm monthly rainfall in October in New Haven87
103 mm monthly rainfall in November in New Haven103
99 mm monthly rainfall in December in New Haven99

More about New Haven

New Haven by month

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

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The climate guide for Connecticut (New Haven) 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 New Haven?

New Haven has a cold climate with hot summers and some rainfall in all months.

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

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Tropical storm risk: New Haven, Connecticut hurricane season

% of month affected by tropical storms
0
0
0
0
0
0
0
1.1%
1.7%
0
0
0
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec

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More about the USA

Compare New Haven with the UK

Below the New Haven chart shows average maximum daytime temperature for New Haven, Connecticut, USA and the UK (London).

Maximum daytime temperature (°C)

New Haven, Connecticut, USA
UK (London)
2
7
3
7
8
10
14
13
19
17
25
20
27
22
27
22
23
19
18
15
12
10
4
8
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec

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

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