Annual mean 9°C · wettest around May · prevailing wind SW
Warmest
25.3 °C
Coldest
-4.4 °C
Wettest
66%
Windiest
5.5 m/s
Prevailing
SW
4.5 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 Hartford over the whole year is 9°C. July is the hottest month, with highs of about 25°C; January is the coldest, with lows of about -7°C. Hartford has no sharply defined rainy season: the chance of rain on a given day runs from 63% in December, the driest month, to 68% in May, the wettest. Winds in Hartford are highest in March, averaging 4.0 m/s (14 km/h), and lightest in August, at 2.5 m/s (9 km/h). The prevailing wind is from the SW. The clearest skies in Hartford come in July, when the sky is typically 35% covered; January is the cloudiest month, at 62%.
Month by month Hartford 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
-4°C
-7°C
-10°C
64%
62%
3.7 m/s
0
0
0
February
-2°C
-6°C
-8°C
64%
49%
3.9 m/s
0
0
4
March
4°C
-1°C
-2°C
67%
51%
4.0 m/s
1
0
11
April
10°C
4°C
5°C
66%
53%
4.0 m/s
11
0
35
May
17°C
10°C
14°C
68%
46%
3.4 m/s
40
7
62
June
23°C
17°C
22°C
68%
38%
3.1 m/s
64
30
50
July
25°C
19°C
25°C
65%
35%
2.6 m/s
63
48
31
August
24°C
17°C
24°C
67%
38%
2.5 m/s
69
41
37
September
21°C
14°C
20°C
66%
41%
2.7 m/s
66
20
61
October
14°C
8°C
10°C
66%
49%
3.3 m/s
26
2
53
November
6°C
1°C
0°C
64%
51%
3.7 m/s
5
0
18
December
-0°C
-3°C
-6°C
63%
59%
3.7 m/s
0
0
3
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 Hartford weather by season
Year round, Hartford has days of about -4°C at their warmest in January, its coolest month, and 25°C in July, its warmest; the coolest hours of the day run from -7°C to 19°C through the year, and the average temperature over the year is 9°C around the clock. Rain is most likely around May and least likely around December. 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.
Hartford weather in winterDecember to February
High -2°CLow -5°CRain 64%
Winter in Hartford has typical daily highs of about -2°C and lows of about -5°C, with a 64% chance of rain on a given day.
Hartford weather in springMarch to May
High 10°CLow 4°CRain 67%
Spring in Hartford has typical daily highs of about 10°C and lows of about 4°C, with a 67% chance of rain on a given day.
Hartford weather in summerJune to August
High 24°CLow 18°CRain 67%
Summer in Hartford has typical daily highs of about 24°C and lows of about 18°C, with a 67% chance of rain on a given day.
Hartford weather in autumnSeptember to November
High 14°CLow 8°CRain 66%
Autumn in Hartford has typical daily highs of about 14°C and lows of about 8°C, with a 66% chance of rain on a given day.
When is the rainy season in Hartford?
Hartford has no sharply defined rainy season: the chance of rain on a given day runs from 63% in December, the driest month, to 68% in May, the wettest.
What time of year is Hartford windiest?
Winds in Hartford are highest in March, averaging 4.0 m/s (14 km/h), and lightest in August, at 2.5 m/s (9 km/h). The prevailing wind is from the SW.
What is the average temperature in Hartford year round?
The average temperature in Hartford over the whole year is 9°C. July is the hottest month, with highs of about 25°C; January is the coldest, with lows of about -7°C.