Chatham weather by month

Check out Chatham weather averages by month. Compare detailed monthly climate statistics including temperature, rainfall and sunshine figures.

Temperature
Rainfall
Sunshine & UV index

Temperature in Chatham (°F)

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Max temperature (daytime)	37	37	43	52	61	70	77	75	70	61	52	43
Min temperature (night-time)	23	23	32	37	46	57	63	63	57	48	39	28
Heat & Humidity	0	0	0	0	0	0	0	0	0	0	0	0
Sea temperature	41	39	39	41	48	55	64	66	63	55	50	45

Note: 0 = None, L = Low, M = Moderate, H = High, VH = Very high, E = Extreme

Sunshine & UV index in Chatham

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Daily hours of sunshine	5	6	7	7	8	9	9	8	8	7	5	5
Daily hours of daylight	10	11	12	13	15	15	15	14	12	11	10	9
UV Index (Maximum)	1	2	4	6	7	8	8	8	6	4	2	1

Rainfall in Chatham

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Number of days with some rain	12	11	12	11	11	11	9	10	8	9	11	13
Average monthly rainfall (inches)	4.1	3.5	4.0	3.7	3.2	2.6	2.5	3.5	3.3	3.5	4.4	4.5

More about Chatham

Chatham by month

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

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The climate guide for Massachusetts (Chatham) shows long term monthly weather averages processed from data supplied by CRU (University of East Anglia), the Met Office & the Netherlands Meteorological Institute. Find out more about our data sources.

What's the climate like in Chatham?

Chatham has a cold climate with warm summers and some rainfall in all months.

Chatham weather in January

Expect daytime maximum temperatures of 37°F in Chatham, Massachusetts in January based on long-term weather averages. There are 5 hours of sunshine per day on average with 12 days with some rainfall and typically 4.1 inches of rainfall in the month, which might fall as snow.

37
37°F max day temperature
5
5 hours of sunshine per day
12
12 days with some rainfall
23
23°F min night temperature
10
10 hours of daylight per day
0
No heat & humidity
4.1
4.1 inches of monthly rainfall
1
1 (Low) UV index
41
41°F sea temperature

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Chatham weather in February

Expect daytime maximum temperatures of 37°F in Chatham, Massachusetts in February based on long-term weather averages. There are 6 hours of sunshine per day on average with 11 days with some rainfall and typically 3.5 inches of rainfall in the month, which might fall as snow.

37
37°F max day temperature
6
6 hours of sunshine per day
11
11 days with some rainfall
23
23°F min night temperature
11
11 hours of daylight per day
0
No heat & humidity
3.5
3.5 inches of monthly rainfall
2
2 (Low) UV index
39
39°F sea temperature

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Chatham weather in March

Expect daytime maximum temperatures of 43°F in Chatham, Massachusetts in March based on long-term weather averages. There are 7 hours of sunshine per day on average with 12 days with some rainfall and typically 4.0 inches of rainfall in the month.

43
43°F max day temperature
7
7 hours of sunshine per day
12
12 days with some rainfall
32
32°F min night temperature
12
12 hours of daylight per day
0
No heat & humidity
4.0
4.0 inches of monthly rainfall
4
4 (Moderate) UV index
39
39°F sea temperature

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Chatham weather in April

Expect daytime maximum temperatures of 52°F in Chatham, Massachusetts in April based on long-term weather averages. There are 7 hours of sunshine per day on average with 11 days with some rainfall and typically 3.7 inches of rainfall in the month.

52
52°F max day temperature
7
7 hours of sunshine per day
11
11 days with some rainfall
37
37°F min night temperature
13
13 hours of daylight per day
0
No heat & humidity
3.7
3.7 inches of monthly rainfall
6
6 (High) UV index
41
41°F sea temperature

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Chatham weather in May

Expect daytime maximum temperatures of 61°F in Chatham, Massachusetts in May based on long-term weather averages. There are 8 hours of sunshine per day on average with 11 days with some rainfall and typically 3.2 inches of rainfall in the month.

61
61°F max day temperature
8
8 hours of sunshine per day
11
11 days with some rainfall
46
46°F min night temperature
15
15 hours of daylight per day
0
No heat & humidity
3.2
3.2 inches of monthly rainfall
7
7 (High) UV index
48
48°F sea temperature

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Chatham weather in June

Expect daytime maximum temperatures of 70°F in Chatham, Massachusetts in June based on long-term weather averages. There are 9 hours of sunshine per day on average with 11 days with some rainfall and typically 2.6 inches of rainfall in the month.

70
70°F max day temperature
9
9 hours of sunshine per day
11
11 days with some rainfall
57
57°F min night temperature
15
15 hours of daylight per day
0
No heat & humidity
2.6
2.6 inches of monthly rainfall
8
8 (Very High) UV index
55
55°F sea temperature

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Chatham weather in July

Expect daytime maximum temperatures of 77°F in Chatham, Massachusetts in July based on long-term weather averages. There are 9 hours of sunshine per day on average with typically 2.5 inches of rainfall in the month.

77
77°F max day temperature
9
9 hours of sunshine per day
9
9 days with some rainfall
63
63°F min night temperature
15
15 hours of daylight per day
0
No heat & humidity
2.5
2.5 inches of monthly rainfall
8
8 (Very High) UV index
64
64°F sea temperature

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Chatham weather in August

Expect daytime maximum temperatures of 75°F in Chatham, Massachusetts in August based on long-term weather averages. There are 8 hours of sunshine per day on average with 10 days with some rainfall and typically 3.5 inches of rainfall in the month.

75
75°F max day temperature
8
8 hours of sunshine per day
10
10 days with some rainfall
63
63°F min night temperature
14
14 hours of daylight per day
0
No heat & humidity
3.5
3.5 inches of monthly rainfall
8
8 (Very High) UV index
66
66°F sea temperature

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Chatham weather in September

Expect daytime maximum temperatures of 70°F in Chatham, Massachusetts in September based on long-term weather averages. There are 8 hours of sunshine per day on average with typically 3.3 inches of rainfall in the month.

70
70°F max day temperature
8
8 hours of sunshine per day
8
8 days with some rainfall
57
57°F min night temperature
12
12 hours of daylight per day
0
No heat & humidity
3.3
3.3 inches of monthly rainfall
6
6 (High) UV index
63
63°F sea temperature

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Chatham weather in October

Expect daytime maximum temperatures of 61°F in Chatham, Massachusetts in October based on long-term weather averages. There are 7 hours of sunshine per day on average with typically 3.5 inches of rainfall in the month.

61
61°F max day temperature
7
7 hours of sunshine per day
9
9 days with some rainfall
48
48°F min night temperature
11
11 hours of daylight per day
0
No heat & humidity
3.5
3.5 inches of monthly rainfall
4
4 (Moderate) UV index
55
55°F sea temperature

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Chatham weather in November

Expect daytime maximum temperatures of 52°F in Chatham, Massachusetts in November based on long-term weather averages. There are 5 hours of sunshine per day on average with 11 days with some rainfall and typically 4.4 inches of rainfall in the month.

52
52°F max day temperature
5
5 hours of sunshine per day
11
11 days with some rainfall
39
39°F min night temperature
10
10 hours of daylight per day
0
No heat & humidity
4.4
4.4 inches of monthly rainfall
2
2 (Low) UV index
50
50°F sea temperature

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Chatham weather in December

Expect daytime maximum temperatures of 43°F in Chatham, Massachusetts in December based on long-term weather averages. There are 5 hours of sunshine per day on average with 13 days with some rainfall and typically 4.5 inches of rainfall in the month.