Boston, USA: Annual Weather Averages

July is the hottest month in Boston with an average temperature of 23.5°C (74°F) and the coldest is January at -1.5°C (29°F) with the most daily sunshine hours at 10 in July. The wettest month is April with an average of 100mm of rain. The best month to swim in the sea is in August when the average sea temperature is 20°C (68°F).

Average Temperature: Boston

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  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
°C -2 0 4 9 15 20 24 23 19 12 7 1
°F 29 32 39 48 58 67 74 73 65 54 45 34

Average High/Low Temperature: Boston

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  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
High °C 2 4 8 13 19 24 28 27 23 16 11 5
High °F 36 39 46 55 66 75 82 81 73 61 52 41
Low °C -5 -4 0 5 10 15 19 18 14 8 3 -3
Low °F 23 25 32 41 50 59 66 64 57 46 37 27

Average Rainfall: Boston

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  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
mm 90 90 90 100 80 90 80 90 70 80 100 70
Days 10 8 12 15 16 13 13 11 12 12 13 11

Average Daily Sunshine Hours: Boston

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  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Hours 6 6 6 8 9 9 10 9 8 7 6 5

Average Sea Temperature: Boston

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  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
°C 5 4 4 5 9 14 19 20 18 14 11 8
°F 41 39 39 41 48 57 66 68 64 57 52 46
Boston IMAGES

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