Bourne weather by month
What a typical year looks like in Bourne, Massachusetts: average highs and lows, rain and snow, and the warmest and coldest days on record. Normals are the 1991–2020 averages at East Wareham, 6 km from Bourne; records cover 1912–2026.
The year at a glance
- Precipitation a year
- 51.1 in1299 mm
- Snow a year
- 37 in94 cm
- Last spring freeze
- Apr 21
- First fall freeze
- Oct 27
- Heating degree days
- 5,773
- Cooling degree days
- 607
Freeze dates are medians (half of years earlier, half later). Degree days use a 65°F base; HVAC design temperatures here are 5°−15° (heating, 99%) and 90°32° (cooling, 1%).
Month by month
Bourne in January
Highs average 39°4° and lows 22°−6°, with 4.2 in106 mm of precipitation and 13 in33 cm of snow in a typical January.
- Record high
- 67°19° (1932)
- Record low
- −15°−26° (1970)
- Heating degree days
- 1076
- Cooling degree days
- 0
Bourne in February
Highs average 41°5° and lows 22°−5°, with 3.7 in94 mm of precipitation and 9 in23 cm of snow in a typical February.
- Record high
- 66°19° (2023)
- Record low
- −22°−30° (1934)
- Heating degree days
- 941
- Cooling degree days
- 0
Bourne in March
Highs average 46°8° and lows 28°−2°, with 5.6 in142 mm of precipitation and 7 in19 cm of snow in a typical March.
- Record high
- 75°24° (1985)
- Record low
- −5°−21° (1948)
- Heating degree days
- 859
- Cooling degree days
- 0
Bourne in April
Highs average 56°13° and lows 37°3°, with 4.6 in116 mm of precipitation and 1.3 in3.3 cm of snow in a typical April.
- Record high
- 89°32° (1990)
- Record low
- 13°−11° (1982)
- Heating degree days
- 560
- Cooling degree days
- 0
Bourne in May
Highs average 66°19° and lows 48°9°, with 3.8 in97 mm of precipitation in a typical May.
- Record high
- 97°36° (1919)
- Record low
- 26°−3° (1948)
- Heating degree days
- 269
- Cooling degree days
- 8
Bourne in June
Highs average 75°24° and lows 57°14°, with 3.7 in94 mm of precipitation in a typical June.
- Record high
- 99°37° (1943)
- Record low
- 36°2° (1918)
- Heating degree days
- 59
- Cooling degree days
- 86
Bourne in July
Highs average 81°27° and lows 64°18°, with 3.1 in78 mm of precipitation in a typical July.
- Record high
- 101°38° (2026)
- Record low
- 41°5° (1927)
- Heating degree days
- 4
- Cooling degree days
- 237
Bourne in August
Highs average 80°27° and lows 63°17°, with 3.6 in91 mm of precipitation in a typical August.
- Record high
- 100°38° (1948)
- Record low
- 38°3° (1940)
- Heating degree days
- 7
- Cooling degree days
- 204
Bourne in September
Highs average 73°23° and lows 55°13°, with 4.5 in115 mm of precipitation in a typical September.
- Record high
- 96°36° (1953)
- Record low
- 29°−2° (1925)
- Heating degree days
- 94
- Cooling degree days
- 67
Bourne in OctoberThis month
Highs average 63°17° and lows 44°7°, with 5 in126 mm of precipitation in a typical October.
- Record high
- 89°32° (1931)
- Record low
- 18°−8° (1936)
- Heating degree days
- 359
- Cooling degree days
- 5
Bourne in November
Highs average 53°12° and lows 35°2°, with 4.5 in113 mm of precipitation and 0.2 in0.5 cm of snow in a typical November.
- Record high
- 82°28° (1946)
- Record low
- 5°−15° (1989)
- Heating degree days
- 632
- Cooling degree days
- 0
Bourne in December
Highs average 44°7° and lows 27°−3°, with 5 in126 mm of precipitation and 6 in16 cm of snow in a typical December.
- Record high
- 70°21° (1998)
- Record low
- −15°−26° (1933)
- Heating degree days
- 913
- Cooling degree days
- 0