Fairfax weather by month
What a typical year looks like in Fairfax, Vermont: average highs and lows, rain and snow, and the warmest and coldest days on record. Normals are the 1991–2020 averages at Mount Mansfield, 22 km from Fairfax; records cover 1954–2026.
The year at a glance
- Precipitation a year
- 81.1 in2060 mm
- Snow a year
- 235 in597 cm
- Last spring freeze
- May 28
- First fall freeze
- Sep 19
- Heating degree days
- 9,736
- Cooling degree days
- 89
Freeze dates are medians (half of years earlier, half later). Degree days use a 65°F base; HVAC design temperatures here are −19°−28° (heating, 99%) and 76°24° (cooling, 1%).
Month by month
Fairfax in January
Highs average 21°−6° and lows 6°−15°, with 5.6 in143 mm of precipitation and 41 in104 cm of snow in a typical January.
- Record high
- 53°12° (2018)
- Record low
- −39° (1957)
- Heating degree days
- 1600
- Cooling degree days
- 0
Fairfax in February
Highs average 23°−5° and lows 7°−14°, with 5.3 in134 mm of precipitation and 45 in113 cm of snow in a typical February.
- Record high
- 56°13° (2018)
- Record low
- −36°−38° (1967)
- Heating degree days
- 1400
- Cooling degree days
- 0
Fairfax in March
Highs average 30°−1° and lows 16°−9°, with 5.9 in149 mm of precipitation and 39 in98 cm of snow in a typical March.
- Record high
- 65°18° (2012)
- Record low
- −31°−35° (2003)
- Heating degree days
- 1305
- Cooling degree days
- 0
Fairfax in April
Highs average 43°6° and lows 28°−2°, with 6.3 in160 mm of precipitation and 21 in54 cm of snow in a typical April.
- Record high
- 74°23° (1990)
- Record low
- −13°−25° (1982)
- Heating degree days
- 898
- Cooling degree days
- 0
Fairfax in May
Highs average 57°14° and lows 41°5°, with 6.9 in175 mm of precipitation and 6 in14 cm of snow in a typical May.
- Record high
- 85°29° (2020)
- Record low
- 5°−15° (1957)
- Heating degree days
- 503
- Cooling degree days
- 4
Fairfax in June
Highs average 65°19° and lows 50°10°, with 7.9 in200 mm of precipitation in a typical June.
- Record high
- 84°29° (1999)
- Record low
- 20°−7° (1980)
- Heating degree days
- 234
- Cooling degree days
- 18
Fairfax in July
Highs average 69°21° and lows 55°13°, with 7.3 in186 mm of precipitation in a typical July.
- Record high
- 84°29° (2018)
- Record low
- 30°−1° (1963)
- Heating degree days
- 124
- Cooling degree days
- 37
Fairfax in August
Highs average 68°20° and lows 54°12°, with 6.9 in175 mm of precipitation in a typical August.
- Record high
- 88°31° (2025)
- Record low
- 25°−4° (1965)
- Heating degree days
- 149
- Cooling degree days
- 22
Fairfax in September
Highs average 61°16° and lows 47°8°, with 7.3 in184 mm of precipitation and 0.1 in0.3 cm of snow in a typical September.
- Record high
- 79°26° (2002)
- Record low
- 16°−9° (1963)
- Heating degree days
- 332
- Cooling degree days
- 8
Fairfax in OctoberThis month
Highs average 48°9° and lows 35°2°, with 7.6 in194 mm of precipitation and 10 in26 cm of snow in a typical October.
- Record high
- 76°24° (2023)
- Record low
- 5°−15° (1962)
- Heating degree days
- 732
- Cooling degree days
- 0
Fairfax in November
Highs average 36°2° and lows 23°−5°, with 6.7 in170 mm of precipitation and 30 in77 cm of snow in a typical November.
- Record high
- 63°17° (1958)
- Record low
- −11°−24° (2018)
- Heating degree days
- 1056
- Cooling degree days
- 0
Fairfax in December
Highs average 27°−3° and lows 13°−11°, with 7.5 in191 mm of precipitation and 43 in110 cm of snow in a typical December.
- Record high
- 60°16° (1966)
- Record low
- −38°−39° (1980)
- Heating degree days
- 1403
- Cooling degree days
- 0