Snow in Brentwood, New York Winter storm alerts · 7-day snow forecast · average snowfall
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Brentwood averages 31.8 inches of snow a year. The snowiest month is January (10.3″), and snow usually falls from November through April. On about 8 days a year at least an inch falls, and about 1 day brings 10 inches or more. Snow covers the ground (1″+) on roughly 23 days of an average winter.
Average snowfall by month
Month
Snowfall
Days 1″+
Days with snow cover
Freezing nights
Avg. low
October
0″
0
0
1
47°F
November
0.5″
<1
<1
9
38°F
December
4.5″
2
3
21
30°F
January
10.3″
2
7
25
25°F
February
9.4″
2
9
22
26°F
March
6.5″
2
4
17
32°F
April
0.6″
<1
<1
3
41°F
Year
31.8″
8
23
98
NOAA NCEI U.S. Climate Normals 1991–2020 — snowfall at Islip Li Macarthur Airport (8 mi from the city center, +0 ft elevation difference). Averages smooth out big years: single winters can bring half or double the normal.
31.8 inches in an average year (NOAA U.S. Climate Normals 1991–2020, Islip Li Macarthur Airport station, 8 miles away). The snowiest month is January with 10.3 inches.
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How many freezing nights does Brentwood have?
About 98 nights a year drop to 32 °F or below (NOAA 1991–2020); the coldest month, January, averages a low of 25 °F.