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Harwich Port, MA Weather


Harwich Port, MA climate is mild during summer when temperatures tend to be in the 60's and very cold during winter when temperatures tend to be in the 30's.

The warmest month of the year is July with an average maximum temperature of 74.60 degrees Fahrenheit, while the coldest month of the year is January with an average minimum temperature of 24.00 degrees Fahrenheit.

Temperature variations between night and day tend to be fairly limited during summer with a difference that can reach 13 degrees Fahrenheit, and fairly limited during winter with an average difference of 14 degrees Fahrenheit.

The annual average precipitation at Harwich Port is 46.71 Inches. Rainfall in is fairly evenly distributed throughout the year. The wettest month of the year is December with an average rainfall of 4.63 Inches.

Weather Data

Normal Climate

Normal Temperatures

(CHATHAM MUNICIPAL AP Weather station, 5.64 miles from Harwich Port)
Month Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual
Max °F 37.7 37.7 42.8 50.4 59.1 68.0 74.6 74.2 68.7 59.7 50.9 42.6 55.5
Mean °F 30.9 31.0 36.8 44.8 53.5 62.0 68.3 68.0 62.8 53.5 45.0 36.2 49.4
Min °F 24.0 24.3 30.7 39.1 47.9 56.0 61.9 61.8 56.9 47.2 39.1 29.7 43.2

Normal Precipitation

(CHATHAM MUNICIPAL AP Weather station, 5.64 miles from Harwich Port)
Month Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual
Inch 4.23 3.98 4.14 3.95 3.71 3.44 3.38 3.33 3.91 4.12 3.89 4.63 46.71