Cambridge weather by month
What a typical year looks like in Cambridge, Massachusetts: average highs and lows, rain and snow, and the warmest and coldest days on record. Normals are the 1991–2020 averages at Boston Area, 9 km from Cambridge; records cover 1872–2026.
The year at a glance
- Precipitation a year
- 43.6 in1107 mm
- Snow a year
- 49 in125 cm
- Last spring freeze
- Apr 3
- First fall freeze
- Nov 9
- Heating degree days
- 5,546
- Cooling degree days
- 800
Freeze dates are medians (half of years earlier, half later). Degree days use a 65°F base; HVAC design temperatures here are 7°−14° (heating, 99%) and 94°34° (cooling, 1%).
Month by month
Cambridge in January
Highs average 37°3° and lows 23°−5°, with 3.4 in86 mm of precipitation and 14 in36 cm of snow in a typical January.
- Record high
- 74°23° (2020)
- Record low
- −13°−25° (1882)
- Heating degree days
- 1086
- Cooling degree days
- 0
Cambridge in February
Highs average 39°4° and lows 25°−4°, with 3.2 in82 mm of precipitation and 14 in37 cm of snow in a typical February.
- Record high
- 73°23° (2017)
- Record low
- −18°−28° (1934)
- Heating degree days
- 930
- Cooling degree days
- 0
Cambridge in March
Highs average 46°8° and lows 31°0°, with 4.2 in106 mm of precipitation and 9 in23 cm of snow in a typical March.
- Record high
- 89°32° (1998)
- Record low
- −8°−22° (1872)
- Heating degree days
- 828
- Cooling degree days
- 0
Cambridge in April
Highs average 56°14° and lows 41°5°, with 3.6 in92 mm of precipitation and 1.6 in4.1 cm of snow in a typical April.
- Record high
- 94°34° (1976)
- Record low
- 11°−12° (1874)
- Heating degree days
- 496
- Cooling degree days
- 4
Cambridge in May
Highs average 67°19° and lows 50°10°, with 3.3 in83 mm of precipitation in a typical May.
- Record high
- 97°36° (1880)
- Record low
- 31°−1° (1882)
- Heating degree days
- 234
- Cooling degree days
- 29
Cambridge in June
Highs average 76°25° and lows 60°15°, with 3.9 in99 mm of precipitation in a typical June.
- Record high
- 102°39° (2025)
- Record low
- 41°5° (1945)
- Heating degree days
- 50
- Cooling degree days
- 138
Cambridge in July
Highs average 82°28° and lows 66°19°, with 3.3 in83 mm of precipitation in a typical July.
- Record high
- 104°40° (1911)
- Record low
- 50°10° (1879)
- Heating degree days
- 4
- Cooling degree days
- 284
Cambridge in August
Highs average 80°27° and lows 65°18°, with 3.2 in82 mm of precipitation in a typical August.
- Record high
- 102°39° (1975)
- Record low
- 46°8° (1940)
- Heating degree days
- 5
- Cooling degree days
- 245
Cambridge in September
Highs average 73°23° and lows 58°15°, with 3.6 in90 mm of precipitation in a typical September.
- Record high
- 102°39° (1881)
- Record low
- 34°1° (1879)
- Heating degree days
- 71
- Cooling degree days
- 91
Cambridge in OctoberThis month
Highs average 62°17° and lows 48°9°, with 4 in102 mm of precipitation and 0.2 in0.5 cm of snow in a typical October.
- Record high
- 90°32° (1881)
- Record low
- 25°−4° (1879)
- Heating degree days
- 326
- Cooling degree days
- 9
Cambridge in November
Highs average 52°11° and lows 38°3°, with 3.7 in93 mm of precipitation and 0.7 in1.8 cm of snow in a typical November.
- Record high
- 83°28° (1950)
- Record low
- −2°−19° (1875)
- Heating degree days
- 608
- Cooling degree days
- 0
Cambridge in December
Highs average 42°6° and lows 29°−2°, with 4.3 in109 mm of precipitation and 9 in23 cm of snow in a typical December.
- Record high
- 76°24° (1998)
- Record low
- −17°−27° (1933)
- Heating degree days
- 908
- Cooling degree days
- 0