Delevan weather by month
What a typical year looks like in Delevan, New York: average highs and lows, rain and snow, and the warmest and coldest days on record. Normals are the 1991–2020 averages at Franklinville, 18 km from Delevan; records cover 1896–2026.
The year at a glance
- Precipitation a year
- 44.6 in1133 mm
- Snow a year
- 109 in276 cm
- Last spring freeze
- May 20
- First fall freeze
- Oct 4
- Heating degree days
- 7,386
- Cooling degree days
- 331
Freeze dates are medians (half of years earlier, half later). Degree days use a 65°F base; HVAC design temperatures here are −13°−25° (heating, 99%) and 88°31° (cooling, 1%).
Month by month
Delevan in January
Highs average 31°−1° and lows 14°−10°, with 3.3 in85 mm of precipitation and 30 in76 cm of snow in a typical January.
- Record high
- 71°22° (1950)
- Record low
- −34°−37° (1904)
- Heating degree days
- 1330
- Cooling degree days
- 0
Delevan in February
Highs average 33°0° and lows 13°−10°, with 2.5 in63 mm of precipitation and 22 in55 cm of snow in a typical February.
- Record high
- 71°22° (2017)
- Record low
- −45°−43° (1934)
- Heating degree days
- 1174
- Cooling degree days
- 0
Delevan in March
Highs average 41°5° and lows 20°−6°, with 3 in76 mm of precipitation and 17 in43 cm of snow in a typical March.
- Record high
- 80°27° (1905)
- Record low
- −26°−32° (2015)
- Heating degree days
- 1059
- Cooling degree days
- 0
Delevan in April
Highs average 55°13° and lows 32°0°, with 3.5 in88 mm of precipitation and 4 in10 cm of snow in a typical April.
- Record high
- 87°31° (1990)
- Record low
- −2°−19° (2016)
- Heating degree days
- 650
- Cooling degree days
- 1
Delevan in May
Highs average 67°20° and lows 43°6°, with 3.8 in97 mm of precipitation in a typical May.
- Record high
- 92°33° (1906)
- Record low
- 15°−9° (1963)
- Heating degree days
- 331
- Cooling degree days
- 20
Delevan in June
Highs average 75°24° and lows 52°11°, with 4.1 in105 mm of precipitation in a typical June.
- Record high
- 97°36° (1934)
- Record low
- 26°−3° (1972)
- Heating degree days
- 106
- Cooling degree days
- 65
Delevan in July
Highs average 79°26° and lows 56°13°, with 4.6 in117 mm of precipitation in a typical July.
- Record high
- 99°37° (1936)
- Record low
- 30°−1° (1965)
- Heating degree days
- 36
- Cooling degree days
- 119
Delevan in August
Highs average 78°25° and lows 55°13°, with 4 in102 mm of precipitation in a typical August.
- Record high
- 95°35° (1899)
- Record low
- 26°−3° (1934)
- Heating degree days
- 50
- Cooling degree days
- 91
Delevan in September
Highs average 71°22° and lows 48°9°, with 4.3 in109 mm of precipitation in a typical September.
- Record high
- 96°36° (1953)
- Record low
- 20°−7° (1959)
- Heating degree days
- 191
- Cooling degree days
- 32
Delevan in OctoberThis month
Highs average 59°15° and lows 38°3°, with 4.3 in109 mm of precipitation and 0.5 in1.3 cm of snow in a typical October.
- Record high
- 86°30° (1900)
- Record low
- 6°−14° (1965)
- Heating degree days
- 513
- Cooling degree days
- 3
Delevan in November
Highs average 47°8° and lows 29°−2°, with 3.7 in94 mm of precipitation and 12 in30 cm of snow in a typical November.
- Record high
- 80°27° (1950)
- Record low
- −6°−21° (1938)
- Heating degree days
- 816
- Cooling degree days
- 0
Delevan in December
Highs average 36°2° and lows 21°−6°, with 3.6 in90 mm of precipitation and 24 in61 cm of snow in a typical December.
- Record high
- 71°22° (1982)
- Record low
- −28°−33° (1942)
- Heating degree days
- 1130
- Cooling degree days
- 0