Wilton weather by month
What a typical year looks like in Wilton, New Hampshire: average highs and lows, rain and snow, and the warmest and coldest days on record. Normals are the 1991–2020 averages at Nashua 2 Nnw, 22 km from Wilton; records cover 1885–2026.
The year at a glance
- Precipitation a year
- 48.2 in1224 mm
- Snow a year
- 53 in134 cm
- Last spring freeze
- Apr 30
- First fall freeze
- Oct 12
- Heating degree days
- 6,566
- Cooling degree days
- 660
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 93°34° (cooling, 1%).
Month by month
Wilton in January
Highs average 34°1° and lows 14°−10°, with 3.4 in87 mm of precipitation and 15 in37 cm of snow in a typical January.
- Record high
- 69°21° (2007)
- Record low
- −29°−34° (1957)
- Heating degree days
- 1269
- Cooling degree days
- 0
Wilton in February
Highs average 37°3° and lows 15°−9°, with 3.2 in82 mm of precipitation and 15 in37 cm of snow in a typical February.
- Record high
- 76°24° (2018)
- Record low
- −35°−37° (1943)
- Heating degree days
- 1088
- Cooling degree days
- 0
Wilton in March
Highs average 45°7° and lows 23°−5°, with 4.3 in109 mm of precipitation and 10 in26 cm of snow in a typical March.
- Record high
- 85°29° (1977)
- Record low
- −18°−28° (1948)
- Heating degree days
- 953
- Cooling degree days
- 0
Wilton in April
Highs average 59°15° and lows 34°1°, with 4.2 in107 mm of precipitation and 0.7 in1.8 cm of snow in a typical April.
- Record high
- 93°34° (1941)
- Record low
- 8°−13° (1969)
- Heating degree days
- 559
- Cooling degree days
- 3
Wilton in May
Highs average 70°21° and lows 46°8°, with 3.9 in99 mm of precipitation in a typical May.
- Record high
- 100°38° (1911)
- Record low
- 20°−7° (1936)
- Heating degree days
- 244
- Cooling degree days
- 27
Wilton in June
Highs average 78°26° and lows 56°13°, with 4.3 in110 mm of precipitation in a typical June.
- Record high
- 101°38° (2025)
- Record low
- 31°−1° (1927)
- Heating degree days
- 54
- Cooling degree days
- 117
Wilton in July
Highs average 84°29° and lows 61°16°, with 3.7 in93 mm of precipitation in a typical July.
- Record high
- 106°41° (1911)
- Record low
- 37°3° (1965)
- Heating degree days
- 6
- Cooling degree days
- 245
Wilton in August
Highs average 83°28° and lows 59°15°, with 3.9 in99 mm of precipitation in a typical August.
- Record high
- 105°41° (1948)
- Record low
- 31°−1° (1940)
- Heating degree days
- 12
- Cooling degree days
- 196
Wilton in September
Highs average 75°24° and lows 51°11°, with 4.1 in103 mm of precipitation in a typical September.
- Record high
- 99°37° (1953)
- Record low
- 23°−5° (1947)
- Heating degree days
- 121
- Cooling degree days
- 68
Wilton in OctoberThis month
Highs average 63°17° and lows 39°4°, with 4.8 in123 mm of precipitation in a typical October.
- Record high
- 91°33° (1947)
- Record low
- 12°−11° (1936)
- Heating degree days
- 444
- Cooling degree days
- 4
Wilton in November
Highs average 51°11° and lows 30°−1°, with 3.9 in99 mm of precipitation and 1.7 in4.3 cm of snow in a typical November.
- Record high
- 81°27° (1950)
- Record low
- −7°−22° (1938)
- Heating degree days
- 743
- Cooling degree days
- 0
Wilton in December
Highs average 40°4° and lows 21°−6°, with 4.5 in113 mm of precipitation and 11 in28 cm of snow in a typical December.
- Record high
- 73°23° (1998)
- Record low
- −24°−31° (1933)
- Heating degree days
- 1073
- Cooling degree days
- 0