Hopkinton weather by month
What a typical year looks like in Hopkinton, Massachusetts: average highs and lows, rain and snow, and the warmest and coldest days on record. Normals are the 1991–2020 averages at Walpole 2, 24 km from Hopkinton; records cover 1972–2026.
The year at a glance
- Precipitation a year
- 49.6 in1260 mm
- Snow a year
- 56 in142 cm
- Last spring freeze
- Apr 29
- First fall freeze
- Oct 12
- Heating degree days
- 5,881
- Cooling degree days
- 727
Freeze dates are medians (half of years earlier, half later). Degree days use a 65°F base; HVAC design temperatures here are 2°−17° (heating, 99%) and 94°34° (cooling, 1%).
Month by month
Hopkinton in January
Highs average 37°3° and lows 20°−7°, with 3.9 in100 mm of precipitation and 15 in38 cm of snow in a typical January.
- Record high
- 71°22° (2020)
- Record low
- −19°−28° (1984)
- Heating degree days
- 1139
- Cooling degree days
- 0
Hopkinton in February
Highs average 40°4° and lows 21°−6°, with 3.4 in85 mm of precipitation and 14 in36 cm of snow in a typical February.
- Record high
- 72°22° (2018)
- Record low
- −16°−27° (1996)
- Heating degree days
- 970
- Cooling degree days
- 0
Hopkinton in March
Highs average 47°9° and lows 28°−2°, with 4.8 in121 mm of precipitation and 12 in29 cm of snow in a typical March.
- Record high
- 90°32° (1998)
- Record low
- −4°−20° (1984)
- Heating degree days
- 848
- Cooling degree days
- 1
Hopkinton in April
Highs average 59°15° and lows 38°3°, with 4.4 in113 mm of precipitation and 2.5 in6.4 cm of snow in a typical April.
- Record high
- 96°36° (1976)
- Record low
- 14°−10° (1982)
- Heating degree days
- 499
- Cooling degree days
- 4
Hopkinton in May
Highs average 70°21° and lows 48°9°, with 3.6 in91 mm of precipitation in a typical May.
- Record high
- 96°36° (2010)
- Record low
- 28°−2° (1985)
- Heating degree days
- 222
- Cooling degree days
- 30
Hopkinton in June
Highs average 78°26° and lows 57°14°, with 4.3 in108 mm of precipitation in a typical June.
- Record high
- 101°38° (2025)
- Record low
- 37°3° (1986)
- Heating degree days
- 49
- Cooling degree days
- 126
Hopkinton in July
Highs average 83°29° and lows 63°17°, with 3.6 in91 mm of precipitation in a typical July.
- Record high
- 102°39° (2011)
- Record low
- 42°6° (1988)
- Heating degree days
- 4
- Cooling degree days
- 263
Hopkinton in August
Highs average 82°28° and lows 62°17°, with 4 in100 mm of precipitation in a typical August.
- Record high
- 102°39° (1975)
- Record low
- 39°4° (1982)
- Heating degree days
- 9
- Cooling degree days
- 218
Hopkinton in September
Highs average 74°23° and lows 54°12°, with 3.7 in94 mm of precipitation in a typical September.
- Record high
- 98°37° (2015)
- Record low
- 30°−1° (2000)
- Heating degree days
- 100
- Cooling degree days
- 78
Hopkinton in OctoberThis month
Highs average 63°17° and lows 43°6°, with 5 in126 mm of precipitation and 0.3 in0.8 cm of snow in a typical October.
- Record high
- 87°31° (2007)
- Record low
- 17°−8° (2020)
- Heating degree days
- 390
- Cooling degree days
- 7
Hopkinton in November
Highs average 51°11° and lows 34°1°, with 4.1 in104 mm of precipitation and 1.7 in4.3 cm of snow in a typical November.
- Record high
- 81°27° (2024)
- Record low
- 4°−16° (1989)
- Heating degree days
- 675
- Cooling degree days
- 0
Hopkinton in December
Highs average 42°5° and lows 25°−4°, with 5 in126 mm of precipitation and 11 in27 cm of snow in a typical December.
- Record high
- 76°24° (1998)
- Record low
- −14°−26° (1980)
- Heating degree days
- 976
- Cooling degree days
- 0