Boston, Mass. H I S T O R I C A L   W E A T H E R   D A T A

	Average Temperature
		Year Jan. Feb. Mar. Apr. May Jun. Jul. Aug. Sep. Oct. Nov. Dec. °F 51.3 28.6 30.3 38.6 48.1 58.2 67.7 73.5 71.9 64.8 54.8 45.3 33.6 °C 10 -1 0 3 8 14 19 23 22 18 12 7 0
		Years Charted: 29 Source: NCDC TD 9641 Clim 81, 1961-1990

	Average High Temperature
		Year Jan. Feb. Mar. Apr. May Jun. Jul. Aug. Sep. Oct. Nov. Dec. °F 59.0 35.7 37.5 45.8 55.9 66.6 76.3 81.8 79.8 72.8 62.7 52.2 40.4 °C 15 2 3 7 13 19 24 27 26 22 17 11 4
		Years Charted: 29 Source: NCDC TD 9641 Clim 81, 1961-1990

	Average Low Temperature
		Year Jan. Feb. Mar. Apr. May Jun. Jul. Aug. Sep. Oct. Nov. Dec. °F 43.6 21.6 23.0 31.3 40.2 49.8 59.1 65.1 64.0 56.8 46.9 38.3 26.7 °C 6 -5 -5 0 4 9 15 18 17 13 8 3 -2
		Years Charted: 29 Source: NCDC TD 9641 Clim 81, 1961-1990

	Average Precipitation
		Year Jan. Feb. Mar. Apr. May Jun. Jul. Aug. Sep. Oct. Nov. Dec. in. 41.51 3.59 3.62 3.69 3.60 3.25 3.09 2.84 3.24 3.06 3.30 4.22 4.01 mm 1054 91 91 93 91 82 78 72 82 77 83 107 101
		Years Charted: 29 Source: NCDC TD 9641 Clim 81, 1961-1990

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