Annual mean 10°C · wettest around October · prevailing wind SW
Warmest
25.8 °C
Coldest
-2.1 °C
Wettest
28%
Windiest
4.1 m/s
Prevailing
SW
3.3 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 10°C. July is the hottest month, with highs of about 26°C; January is the coldest, with lows of about -3°C. Chatham has no sharply defined rainy season: the chance of rain on a given day runs from 18% in September, the driest month, to 23% in October, the wettest. Winds in Chatham are highest in February, averaging 3.1 m/s (11 km/h), and lightest in July, at 1.9 m/s (7 km/h). The prevailing wind is from the SW. The clearest skies in Chatham come in July, when the sky is typically 40% covered; January is the cloudiest month, at 72%.
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
-2°C
-3°C
-7°C
22%
72%
3.0 m/s
0
0
1
February
0°C
-3°C
-6°C
20%
64%
3.1 m/s
0
0
4
March
5°C
0°C
-1°C
22%
58%
3.1 m/s
1
0
12
April
10°C
5°C
5°C
23%
57%
3.0 m/s
11
0
37
May
17°C
11°C
14°C
22%
50%
2.6 m/s
43
9
65
June
23°C
17°C
22°C
19%
42%
2.3 m/s
72
29
55
July
26°C
20°C
26°C
20%
40%
1.9 m/s
57
59
23
August
25°C
19°C
26°C
20%
42%
1.9 m/s
65
54
29
September
22°C
15°C
21°C
18%
46%
2.0 m/s
74
26
59
October
15°C
10°C
12°C
23%
55%
2.5 m/s
36
4
65
November
7°C
3°C
2°C
22%
60%
2.9 m/s
5
0
25
December
2°C
-0°C
-4°C
22%
71%
3.1 m/s
0
0
5
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 -2°C at their warmest in January, its coolest month, and 26°C in July, its warmest; the coolest hours of the day run from -3°C to 20°C through the year, and the average temperature over the year is 10°C around the clock. Rain is most likely around October and least likely around September. 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 0°CLow -2°CRain 21%
Winter in Chatham has typical daily highs of about 0°C and lows of about -2°C, with a 21% chance of rain on a given day.
Chatham weather in springMarch to May
High 10°CLow 5°CRain 22%
Spring in Chatham has typical daily highs of about 10°C and lows of about 5°C, with a 22% chance of rain on a given day.
Chatham weather in summerJune to August
High 24°CLow 18°CRain 20%
Summer in Chatham has typical daily highs of about 24°C and lows of about 18°C, with a 20% chance of rain on a given day.
Chatham weather in autumnSeptember to November
High 15°CLow 9°CRain 21%
Autumn in Chatham has typical daily highs of about 15°C and lows of about 9°C, with a 21% 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 18% in September, the driest month, to 23% in October, the wettest.
What time of year is Chatham windiest?
Winds in Chatham are highest in February, averaging 3.1 m/s (11 km/h), and lightest in July, at 1.9 m/s (7 km/h). The prevailing wind is from the SW.
What is the average temperature in Chatham year round?
The average temperature in Chatham over the whole year is 10°C. July is the hottest month, with highs of about 26°C; January is the coldest, with lows of about -3°C.