Westborough weather by month
What a typical year looks like in Westborough, Massachusetts: average highs and lows, rain and snow, and the warmest and coldest days on record. Normals are the 1991–2020 averages at Worcester Regional Airport, 21 km from Westborough; records cover 1892–2026.
The year at a glance
- Precipitation a year
- 48.3 in1226 mm
- Snow a year
- 73 in185 cm
- Last spring freeze
- Apr 21
- First fall freeze
- Oct 22
- Heating degree days
- 6,622
- Cooling degree days
- 501
Freeze dates are medians (half of years earlier, half later). Degree days use a 65°F base; HVAC design temperatures here are 0°−18° (heating, 99%) and 89°32° (cooling, 1%).
Month by month
Westborough in January
Highs average 32°0° and lows 17°−8°, with 3.5 in89 mm of precipitation and 18 in46 cm of snow in a typical January.
- Record high
- 67°19° (1932)
- Record low
- −19°−28° (1957)
- Heating degree days
- 1249
- Cooling degree days
- 0
Westborough in February
Highs average 35°2° and lows 19°−7°, with 3.3 in83 mm of precipitation and 21 in54 cm of snow in a typical February.
- Record high
- 71°22° (2018)
- Record low
- −24°−31° (1943)
- Heating degree days
- 1064
- Cooling degree days
- 0
Westborough in March
Highs average 43°6° and lows 26°−3°, with 4.2 in106 mm of precipitation and 14 in35 cm of snow in a typical March.
- Record high
- 84°29° (1945)
- Record low
- −6°−21° (1943)
- Heating degree days
- 946
- Cooling degree days
- 0
Westborough in April
Highs average 56°13° and lows 37°3°, with 4.1 in104 mm of precipitation and 1.9 in4.8 cm of snow in a typical April.
- Record high
- 91°33° (1941)
- Record low
- 9°−13° (1923)
- Heating degree days
- 570
- Cooling degree days
- 3
Westborough in May
Highs average 67°19° and lows 47°8°, with 3.6 in90 mm of precipitation in a typical May.
- Record high
- 94°34° (2010)
- Record low
- 27°−3° (1944)
- Heating degree days
- 278
- Cooling degree days
- 21
Westborough in June
Highs average 75°24° and lows 56°13°, with 4.2 in107 mm of precipitation in a typical June.
- Record high
- 98°37° (1952)
- Record low
- 33°1° (1926)
- Heating degree days
- 78
- Cooling degree days
- 84
Westborough in July
Highs average 80°27° and lows 62°17°, with 3.9 in100 mm of precipitation in a typical July.
- Record high
- 102°39° (1911)
- Record low
- 41°5° (1945)
- Heating degree days
- 12
- Cooling degree days
- 190
Westborough in August
Highs average 78°26° and lows 61°16°, with 4.1 in105 mm of precipitation in a typical August.
- Record high
- 99°37° (1944)
- Record low
- 38°3° (1941)
- Heating degree days
- 20
- Cooling degree days
- 153
Westborough in September
Highs average 71°22° and lows 53°12°, with 4.2 in108 mm of precipitation in a typical September.
- Record high
- 99°37° (1953)
- Record low
- 27°−3° (1947)
- Heating degree days
- 139
- Cooling degree days
- 47
Westborough in OctoberThis month
Highs average 59°15° and lows 42°6°, with 4.8 in123 mm of precipitation and 1.1 in2.8 cm of snow in a typical October.
- Record high
- 91°33° (1898)
- Record low
- 19°−7° (1928)
- Heating degree days
- 451
- Cooling degree days
- 3
Westborough in November
Highs average 48°9° and lows 33°0°, with 4 in102 mm of precipitation and 1.9 in4.8 cm of snow in a typical November.
- Record high
- 79°26° (1950)
- Record low
- 3°−16° (1938)
- Heating degree days
- 744
- Cooling degree days
- 0
Westborough in December
Highs average 38°3° and lows 23°−5°, with 4.3 in109 mm of precipitation and 15 in38 cm of snow in a typical December.
- Record high
- 72°22° (1998)
- Record low
- −17°−27° (1933)
- Heating degree days
- 1071
- Cooling degree days
- 0