Annual mean 12°C · wettest around February · prevailing wind W
Warmest
27.2 °C
Coldest
1.5 °C
Wettest
19%
Windiest
5.0 m/s
Prevailing
W
4.2 m/s average
When this place is good five ratings · thirty-six ten-day sections · click a cell to read it
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
Every reading
bars actual · line feels-like, °Cchance of rain, %wind speed, m/ssky covered, %
The average temperature in New Haven over the whole year is 12°C. July is the hottest month, with highs of about 27°C; January is the coldest, with lows of about -2°C. New Haven has no sharply defined rainy season: the chance of rain on a given day runs from 6% in June, the driest month, to 18% in February, the wettest. Winds in New Haven are highest in March, averaging 3.8 m/s (14 km/h), and lightest in July, at 2.5 m/s (9 km/h). The prevailing wind is from the W. The clearest skies in New Haven come in November, when the sky is typically 39% covered; May is the cloudiest month, at 53%.
Month by month New Haven climate by month: average temperatures year round · click a month to read it
Month
High
Low
Feels like
Chance of rain
Cloud
Wind
Being outside
Sun
Walking
January
2°C
-2°C
-4°C
16%
51%
3.5 m/s
0
0
6
February
3°C
-1°C
-2°C
18%
48%
3.3 m/s
1
0
11
March
7°C
2°C
2°C
12%
48%
3.8 m/s
2
0
26
April
12°C
6°C
8°C
13%
52%
3.6 m/s
15
1
53
May
18°C
12°C
15°C
12%
53%
3.1 m/s
52
8
77
June
24°C
17°C
23°C
6%
43%
2.8 m/s
76
34
53
July
27°C
21°C
28°C
8%
41%
2.5 m/s
47
66
15
August
26°C
20°C
27°C
7%
40%
2.5 m/s
59
57
25
September
22°C
16°C
21°C
9%
44%
2.7 m/s
75
26
59
October
17°C
10°C
14°C
12%
47%
2.9 m/s
48
4
75
November
10°C
4°C
5°C
9%
39%
3.1 m/s
11
0
40
December
4°C
0°C
-1°C
13%
48%
3.0 m/s
0
0
13
High and low are the warmest and coolest of four readings a day — midnight, 6am, noon and 6pm — so a true overnight low can sit a degree or two under them. Chance of rain, cloud and wind are the day’s average; feels-like and the three ratings (each out of 100: Good from 55, Ideal from 80) are read at midday.
Seasons, and the year in short New Haven weather by season
Year round, New Haven has days of about 2°C at their warmest in January, its coolest month, and 27°C in July, its warmest; the coolest hours of the day run from -2°C to 21°C through the year, and the average temperature over the year is 12°C around the clock. Rain is most likely around February and least likely around June. Every figure here is a decade of observations blended into one representative year, so it reads as what this date is usually like, not a forecast for one particular day.
New Haven weather in winterDecember to February
High 3°CLow -1°CRain 16%
Winter in New Haven has typical daily highs of about 3°C and lows of about -1°C, with a 16% chance of rain on a given day.
New Haven weather in springMarch to May
High 13°CLow 7°CRain 12%
Spring in New Haven has typical daily highs of about 13°C and lows of about 7°C, with a 12% chance of rain on a given day.
New Haven weather in summerJune to August
High 25°CLow 19°CRain 7%
Summer in New Haven has typical daily highs of about 25°C and lows of about 19°C, with a 7% chance of rain on a given day.
New Haven weather in autumnSeptember to November
High 16°CLow 10°CRain 10%
Autumn in New Haven has typical daily highs of about 16°C and lows of about 10°C, with a 10% chance of rain on a given day.
When is the rainy season in New Haven?
New Haven has no sharply defined rainy season: the chance of rain on a given day runs from 6% in June, the driest month, to 18% in February, the wettest.
What time of year is New Haven windiest?
Winds in New Haven are highest in March, averaging 3.8 m/s (14 km/h), and lightest in July, at 2.5 m/s (9 km/h). The prevailing wind is from the W.
What is the average temperature in New Haven year round?
The average temperature in New Haven over the whole year is 12°C. July is the hottest month, with highs of about 27°C; January is the coldest, with lows of about -2°C.