Annual mean 18°C · wettest around January · prevailing wind SW
Warmest
28.6 °C
Coldest
16.5 °C
Wettest
17%
Windiest
3.6 m/s
Prevailing
SW
2.9 m/s average
When this place is good five ratings · thirty-six ten-day sections · click a cell to read it
never good
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 Norwalk over the whole year is 18°C. August is the hottest month, with highs of about 28°C; January is the coldest, with lows of about 10°C. Norwalk has no sharply defined rainy season: the chance of rain on a given day runs from 1% in July, the driest month, to 15% in January, the wettest. Winds in Norwalk are highest in May, averaging 2.4 m/s (9 km/h), and lightest in November, at 1.5 m/s (5 km/h). The prevailing wind is from the SW. The clearest skies in Norwalk come in August, when the sky is typically 22% covered; May is the cloudiest month, at 50%.
Month by month Norwalk 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
17°C
10°C
15°C
15%
31%
1.7 m/s
55
2
86
February
18°C
10°C
15°C
15%
32%
2.0 m/s
55
5
81
March
18°C
11°C
15°C
14%
39%
2.3 m/s
58
5
83
April
20°C
13°C
18°C
8%
36%
2.3 m/s
74
11
79
May
21°C
15°C
19°C
6%
50%
2.4 m/s
83
11
79
June
24°C
18°C
23°C
3%
42%
2.4 m/s
81
33
55
July
27°C
20°C
26°C
1%
26%
2.4 m/s
61
61
27
August
28°C
20°C
28°C
5%
22%
2.2 m/s
51
68
18
September
27°C
19°C
27°C
4%
29%
2.1 m/s
62
54
29
October
25°C
16°C
24°C
8%
27%
1.8 m/s
77
40
48
November
22°C
13°C
19°C
10%
23%
1.5 m/s
82
14
76
December
18°C
10°C
16°C
13%
28%
1.6 m/s
63
2
88
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 Norwalk weather by season
Year round, Norwalk has days of about 17°C at their warmest in January, its coolest month, and 28°C in August, its warmest; the coolest hours of the day run from 10°C to 20°C through the year, and the average temperature over the year is 18°C around the clock. Rain is most likely around January and least likely around July. 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.
Norwalk weather in winterDecember to February
High 18°CLow 10°CRain 15%
Winter in Norwalk has typical daily highs of about 18°C and lows of about 10°C, with a 15% chance of rain on a given day.
Norwalk weather in springMarch to May
High 20°CLow 13°CRain 9%
Spring in Norwalk has typical daily highs of about 20°C and lows of about 13°C, with a 9% chance of rain on a given day.
Norwalk weather in summerJune to August
High 26°CLow 19°CRain 3%
Summer in Norwalk has typical daily highs of about 26°C and lows of about 19°C, with a 3% chance of rain on a given day.
Norwalk weather in autumnSeptember to November
High 24°CLow 16°CRain 7%
Autumn in Norwalk has typical daily highs of about 24°C and lows of about 16°C, with a 7% chance of rain on a given day.
When is the rainy season in Norwalk?
Norwalk has no sharply defined rainy season: the chance of rain on a given day runs from 1% in July, the driest month, to 15% in January, the wettest.
What time of year is Norwalk windiest?
Winds in Norwalk are highest in May, averaging 2.4 m/s (9 km/h), and lightest in November, at 1.5 m/s (5 km/h). The prevailing wind is from the SW.
What is the average temperature in Norwalk year round?
The average temperature in Norwalk over the whole year is 18°C. August is the hottest month, with highs of about 28°C; January is the coldest, with lows of about 10°C.