Lake Delta weather by month
What a typical year looks like in Lake Delta, New York: average highs and lows, rain and snow, and the warmest and coldest days on record. Normals are the 1991–2020 averages at Boonville 4 Ssw, 18 km from Lake Delta; records cover 1949–2026.
The year at a glance
- Precipitation a year
- 58.2 in1477 mm
- Snow a year
- 164 in417 cm
- Last spring freeze
- May 13
- First fall freeze
- Oct 5
- Heating degree days
- 8,530
- Cooling degree days
- 194
Freeze dates are medians (half of years earlier, half later). Degree days use a 65°F base; HVAC design temperatures here are −14°−26° (heating, 99%) and 85°29° (cooling, 1%).
Month by month
Lake Delta in January
Highs average 25°−4° and lows 8°−13°, with 4.9 in125 mm of precipitation and 40 in101 cm of snow in a typical January.
- Record high
- 61°16° (1950)
- Record low
- −31°−35° (1981)
- Heating degree days
- 1506
- Cooling degree days
- 0
Lake Delta in February
Highs average 27°−3° and lows 9°−13°, with 4 in101 mm of precipitation and 39 in100 cm of snow in a typical February.
- Record high
- 63°17° (2018)
- Record low
- −29°−34° (2016)
- Heating degree days
- 1309
- Cooling degree days
- 0
Lake Delta in March
Highs average 36°2° and lows 18°−8°, with 4.2 in105 mm of precipitation and 27 in68 cm of snow in a typical March.
- Record high
- 77°25° (1986)
- Record low
- −26°−32° (1950)
- Heating degree days
- 1192
- Cooling degree days
- 0
Lake Delta in April
Highs average 50°10° and lows 30°−1°, with 4.6 in116 mm of precipitation and 6 in16 cm of snow in a typical April.
- Record high
- 86°30° (2009)
- Record low
- −1°−18° (1972)
- Heating degree days
- 755
- Cooling degree days
- 1
Lake Delta in May
Highs average 63°17° and lows 43°6°, with 4.6 in118 mm of precipitation and 0.2 in0.5 cm of snow in a typical May.
- Record high
- 89°32° (2010)
- Record low
- 18°−8° (1966)
- Heating degree days
- 388
- Cooling degree days
- 10
Lake Delta in June
Highs average 71°22° and lows 52°11°, with 5.3 in134 mm of precipitation in a typical June.
- Record high
- 90°32° (1953)
- Record low
- 29°−2° (1986)
- Heating degree days
- 148
- Cooling degree days
- 35
Lake Delta in July
Highs average 75°24° and lows 56°13°, with 4.6 in117 mm of precipitation in a typical July.
- Record high
- 94°34° (1988)
- Record low
- 32°0° (1963)
- Heating degree days
- 56
- Cooling degree days
- 73
Lake Delta in August
Highs average 74°23° and lows 55°13°, with 4.7 in119 mm of precipitation in a typical August.
- Record high
- 93°34° (1975)
- Record low
- 35°2° (1965)
- Heating degree days
- 75
- Cooling degree days
- 58
Lake Delta in September
Highs average 67°19° and lows 48°9°, with 4.9 in125 mm of precipitation in a typical September.
- Record high
- 90°32° (1953)
- Record low
- 24°−4° (1950)
- Heating degree days
- 251
- Cooling degree days
- 17
Lake Delta in OctoberThis month
Highs average 54°12° and lows 37°3°, with 6.1 in155 mm of precipitation and 1.4 in3.6 cm of snow in a typical October.
- Record high
- 82°28° (1951)
- Record low
- 14°−10° (1966)
- Heating degree days
- 611
- Cooling degree days
- 0
Lake Delta in November
Highs average 41°5° and lows 26°−3°, with 5 in128 mm of precipitation and 16 in39 cm of snow in a typical November.
- Record high
- 74°23° (2024)
- Record low
- −8°−22° (1951)
- Heating degree days
- 940
- Cooling degree days
- 0
Lake Delta in December
Highs average 30°−1° and lows 16°−9°, with 5.3 in134 mm of precipitation and 35 in89 cm of snow in a typical December.
- Record high
- 74°23° (2003)
- Record low
- −23°−31° (1968)
- Heating degree days
- 1299
- Cooling degree days
- 0