Northampton weather by month
What a typical year looks like in Northampton, Massachusetts: average highs and lows, rain and snow, and the warmest and coldest days on record. Normals are the 1991–2020 averages at Westfield-Barnes Regional Airport, 19 km from Northampton; records cover 1926–2026.
The year at a glance
- Precipitation a year
- 45.2 in1147 mm
- Snow a year
- Rare
- Last spring freeze
- May 7
- First fall freeze
- Oct 11
- Heating degree days
- 6,329
- Cooling degree days
- 676
Freeze dates are medians (half of years earlier, half later). Degree days use a 65°F base; HVAC design temperatures here are −4°−20° (heating, 99%) and 95°35° (cooling, 1%).
Month by month
Northampton in January
Highs average 35°2° and lows 16°−9°, with 2.8 in70 mm of precipitation in a typical January.
- Record high
- 71°22° (2007)
- Record low
- −14°−26° (2003)
- Heating degree days
- 1235
- Cooling degree days
- 0
Northampton in February
Highs average 38°3° and lows 17°−8°, with 2.6 in66 mm of precipitation in a typical February.
- Record high
- 79°26° (2018)
- Record low
- −20°−29° (1934)
- Heating degree days
- 1047
- Cooling degree days
- 0
Northampton in March
Highs average 47°8° and lows 26°−4°, with 3.4 in87 mm of precipitation in a typical March.
- Record high
- 83°28° (2012)
- Record low
- −14°−26° (2003)
- Heating degree days
- 894
- Cooling degree days
- 0
Northampton in April
Highs average 60°16° and lows 35°2°, with 4.1 in103 mm of precipitation in a typical April.
- Record high
- 95°35° (2002)
- Record low
- 17°−8° (2002)
- Heating degree days
- 520
- Cooling degree days
- 5
Northampton in May
Highs average 72°22° and lows 46°8°, with 3.7 in94 mm of precipitation in a typical May.
- Record high
- 98°37° (2010)
- Record low
- 25°−4° (2008)
- Heating degree days
- 222
- Cooling degree days
- 33
Northampton in June
Highs average 80°27° and lows 55°13°, with 4.4 in111 mm of precipitation in a typical June.
- Record high
- 102°39° (2008)
- Record low
- 34°1° (2001)
- Heating degree days
- 49
- Cooling degree days
- 121
Northampton in July
Highs average 85°29° and lows 61°16°, with 4.2 in105 mm of precipitation in a typical July.
- Record high
- 103°39° (2010)
- Record low
- 40°4° (1929)
- Heating degree days
- 5
- Cooling degree days
- 250
Northampton in August
Highs average 83°28° and lows 59°15°, with 3.7 in94 mm of precipitation in a typical August.
- Record high
- 101°38° (2006)
- Record low
- 41°5° (2000)
- Heating degree days
- 12
- Cooling degree days
- 198
Northampton in September
Highs average 75°24° and lows 51°11°, with 4.6 in117 mm of precipitation in a typical September.
- Record high
- 97°36° (1973)
- Record low
- 28°−2° (2000)
- Heating degree days
- 121
- Cooling degree days
- 64
Northampton in OctoberThis month
Highs average 63°17° and lows 39°4°, with 4.7 in120 mm of precipitation in a typical October.
- Record high
- 87°31° (2007)
- Record low
- 18°−8° (2015)
- Heating degree days
- 433
- Cooling degree days
- 5
Northampton in November
Highs average 51°10° and lows 30°−1°, with 3.5 in88 mm of precipitation in a typical November.
- Record high
- 81°27° (2024)
- Record low
- 2°−17° (2018)
- Heating degree days
- 735
- Cooling degree days
- 0
Northampton in December
Highs average 40°4° and lows 22°−5°, with 3.6 in91 mm of precipitation in a typical December.
- Record high
- 73°23° (1998)
- Record low
- −14°−26° (1933)
- Heating degree days
- 1056
- Cooling degree days
- 0