Annual mean 13°C · wettest around February · prevailing wind W
Warmest
28.7 °C
Coldest
2.1 °C
Wettest
40%
Windiest
4.2 m/s
Prevailing
W
3.4 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 Chatham over the whole year is 13°C. July is the hottest month, with highs of about 28°C; January is the coldest, with lows of about -1°C. Chatham has no sharply defined rainy season: the chance of rain on a given day runs from 31% in June, the driest month, to 41% in February, the wettest. Winds in Chatham are highest in March, averaging 3.2 m/s (12 km/h), and lightest in August, at 1.9 m/s (7 km/h). The prevailing wind is from the W. The clearest skies in Chatham come in November, when the sky is typically 37% covered; May is the cloudiest month, at 54%.
Month by month Chatham 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
3°C
-1°C
-3°C
39%
48%
3.0 m/s
1
0
8
February
4°C
0°C
-0°C
41%
46%
2.8 m/s
2
0
17
March
9°C
3°C
4°C
38%
45%
3.2 m/s
10
0
36
April
14°C
8°C
10°C
37%
47%
3.1 m/s
27
3
59
May
19°C
13°C
18°C
31%
54%
2.5 m/s
59
16
68
June
25°C
18°C
25°C
31%
42%
2.2 m/s
65
44
36
July
28°C
22°C
30°C
38%
39%
2.0 m/s
29
62
8
August
27°C
20°C
29°C
35%
40%
1.9 m/s
41
61
14
September
24°C
17°C
23°C
34%
44%
2.1 m/s
69
34
47
October
18°C
11°C
16°C
38%
44%
2.2 m/s
53
9
70
November
11°C
5°C
7°C
37%
37%
2.6 m/s
13
0
47
December
5°C
1°C
0°C
40%
47%
2.6 m/s
1
0
15
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 Chatham weather by season
Year round, Chatham has days of about 3°C at their warmest in January, its coolest month, and 28°C in July, its warmest; the coolest hours of the day run from -1°C to 22°C through the year, and the average temperature over the year is 13°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.
Chatham weather in winterDecember to February
High 4°CLow -0°CRain 40%
Winter in Chatham has typical daily highs of about 4°C and lows of about -0°C, with a 40% chance of rain on a given day.
Chatham weather in springMarch to May
High 14°CLow 8°CRain 35%
Spring in Chatham has typical daily highs of about 14°C and lows of about 8°C, with a 35% chance of rain on a given day.
Chatham weather in summerJune to August
High 27°CLow 20°CRain 34%
Summer in Chatham has typical daily highs of about 27°C and lows of about 20°C, with a 34% chance of rain on a given day.
Chatham weather in autumnSeptember to November
High 17°CLow 11°CRain 36%
Autumn in Chatham has typical daily highs of about 17°C and lows of about 11°C, with a 36% chance of rain on a given day.
When is the rainy season in Chatham?
Chatham has no sharply defined rainy season: the chance of rain on a given day runs from 31% in June, the driest month, to 41% in February, the wettest.
What time of year is Chatham windiest?
Winds in Chatham are highest in March, averaging 3.2 m/s (12 km/h), and lightest in August, at 1.9 m/s (7 km/h). The prevailing wind is from the W.
What is the average temperature in Chatham year round?
The average temperature in Chatham over the whole year is 13°C. July is the hottest month, with highs of about 28°C; January is the coldest, with lows of about -1°C.