Annual mean 12°C · wettest around March · prevailing wind SW
Warmest
28.2 °C
Coldest
-1.2 °C
Wettest
66%
Windiest
5.9 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 Chatham over the whole year is 12°C. July is the hottest month, with highs of about 28°C; January is the coldest, with lows of about -4°C. Chatham has no sharply defined rainy season: the chance of rain on a given day runs from 54% in January, the driest month, to 62% in March, the wettest. Winds in Chatham are highest in March, averaging 4.6 m/s (17 km/h), and lightest in August, at 2.1 m/s (8 km/h). The prevailing wind is from the SW. The clearest skies in Chatham come in June, when the sky is typically 26% covered; January is the cloudiest month, at 56%.
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
-0°C
-4°C
-6°C
54%
56%
4.2 m/s
0
0
5
February
4°C
-2°C
-2°C
56%
46%
4.2 m/s
3
0
17
March
10°C
3°C
4°C
62%
48%
4.6 m/s
8
0
31
April
15°C
8°C
10°C
62%
43%
4.5 m/s
28
2
54
May
22°C
14°C
20°C
60%
43%
3.6 m/s
58
23
53
June
27°C
20°C
27°C
58%
26%
3.0 m/s
48
53
21
July
28°C
21°C
30°C
60%
30%
2.2 m/s
27
59
6
August
27°C
19°C
29°C
58%
31%
2.1 m/s
39
55
13
September
26°C
16°C
25°C
54%
27%
2.4 m/s
56
46
33
October
18°C
10°C
14°C
56%
37%
3.3 m/s
42
10
58
November
9°C
3°C
5°C
55%
39%
3.7 m/s
12
0
35
December
4°C
-1°C
-2°C
55%
48%
3.9 m/s
0
0
14
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 -0°C at their warmest in January, its coolest month, and 28°C in July, its warmest; the coolest hours of the day run from -4°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 March and least likely around January. 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 2°CLow -2°CRain 55%
Winter in Chatham has typical daily highs of about 2°C and lows of about -2°C, with a 55% chance of rain on a given day.
Chatham weather in springMarch to May
High 16°CLow 8°CRain 61%
Spring in Chatham has typical daily highs of about 16°C and lows of about 8°C, with a 61% chance of rain on a given day.
Chatham weather in summerJune to August
High 28°CLow 20°CRain 59%
Summer in Chatham has typical daily highs of about 28°C and lows of about 20°C, with a 59% chance of rain on a given day.
Chatham weather in autumnSeptember to November
High 18°CLow 9°CRain 55%
Autumn in Chatham has typical daily highs of about 18°C and lows of about 9°C, with a 55% 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 54% in January, the driest month, to 62% in March, the wettest.
What time of year is Chatham windiest?
Winds in Chatham are highest in March, averaging 4.6 m/s (17 km/h), and lightest in August, at 2.1 m/s (8 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 12°C. July is the hottest month, with highs of about 28°C; January is the coldest, with lows of about -4°C.