The last 30 years in Brentwood averaged 2.3° warmer than the 1900s. The biggest change is in December (+3.7°).
+2.3°1991–2020 vs. 1901–2000
A bigger shift than in 99% of U.S. towns.
❄️ Winter+3.1°now 34°, was 31°
🌷 Spring+2.1°now 50°, was 48°
☀️ Summer+2.2°now 72°, was 70°
🍂 Fall+1.9°now 56°, was 54°
Change by month
+2.3°
+3.2°
+2.3°
+2.4°
+1.7°
+2.0°
+2.1°
+2.4°
+2.1°
+1.6°
+2.1°
+3.7°
JanFebMarAprMayJunJulAugSepOctNovDec
A normal year
What a year in Brentwood feels like
Typical highs and lows by season and by month, from NOAA’s 30-year normals.
❄️Winter
42° / 26°
8 days with 1"+ of snow
🌷Spring
59° / 40°
Last frost around Apr 10
☀️Summer
82° / 63°
8 days reach 90°
🍂Fall
65° / 47°
First frost around Nov 2
10°
20°
30°
40°
50°
60°
70°
80°
90°
100°
32°
40°24°
42°25°
49°31°
60°40°
69°50°
78°60°
84°66°
82°64°
76°58°
65°46°
54°37°
45°30°
JanFebMarAprMayJunJulAugSepOctNovDec
Best months to be outsideMayJunJulAugSepOctHighs of 62–84° and lows of 40° or more
Living here
Living with Brentwood’s climate
What the numbers mean for a garden, a driveway, a furnace and a free afternoon.
🌱The garden window
207 frost-free days. The last frost comes by Apr 10 in half of years, so many gardeners wait a week or two past that to set out tomatoes. The first fall frost comes by Nov 2.
❄️Snow season
About 32" a winter over 8 days with an inch or more, most in January. Snow covers the ground about 23 days a year.
🔥Furnace season
Months averaging under 55° run from November through April. Heating is 85% of the year’s heating-and-cooling load.
☀️Summer heat
About 8 days a year reach 90°, and July afternoons average 84°.
🥾Get outside
The nicest months are May, June, July, August, September and October. 5.5 miles of trails are waiting.
Temperatures and rain come from NOAA’s 5 km grid, so each town gets its own value. Snow and frost-free days come from the nearest weather station, so neighbors often share them.
Compared with other towns
How Brentwood compares
Against every U.S. town on TownTapestry, each counted once, with its place in New York.
Summer heat84° July high
CoolerU.S. middleHotter
Cooler than 59% of U.S. towns397th hottest of 2,223 New York towns
Winter cold24° January low
MilderU.S. middleColder
Milder than 70% of U.S. towns226th mildest of 2,223 New York towns
Precipitation45" a year
DrierU.S. middleWetter
Wetter than 69% of U.S. towns862nd wettest of 2,223 New York towns
Snow32" a winter
LessU.S. middleMore
Snowier than 59% of U.S. towns351st least snowy of 2,156 New York towns
Growing season207 frost-free days
ShorterU.S. middleLonger
Longer than 76% of U.S. towns199th longest of 2,222 New York towns
Average highs, lows, rain and snow for every month, from NOAA’s 1991–2020 normals.
Month
High
Low
Rain + melt
Snow
Wet days
Snow on ground
30-yr range
January
40°
24°
3.4"
10.3"
11
7
24° – 38°
February
42°
25°
3.0"
9.4"
10
9
22° – 39°
March
49°
31°
4.3"
6.5"
11
4
36° – 48°
April
60°
40°
3.9"
0.6"
11
0
46° – 54°
May
69°
50°
3.4"
0
12
0
55° – 64°
June
78°
60°
4.0"
0
10
0
66° – 73°
July
84°
66°
3.4"
0
9
0
70° – 79°
August
82°
64°
3.9"
0
9
0
69° – 77°
September
76°
58°
3.9"
0
9
0
64° – 71°
October
65°
46°
4.0"
0
9
0
51° – 62°
November
54°
37°
3.4"
0.5"
10
0
40° – 50°
December
45°
30°
4.4"
4.5"
12
3
30° – 49°
Year
62°
44°
45.1"
31.8"
122
23
Heating & cooling
Heating and cooling a home in Brentwood
85% of the work is heating, so the furnace matters far more than the air conditioner.
5,183 heating degree daysLess heating than 62% of U.S. towns
885 cooling degree daysMore cooling than 53% of U.S. towns
Degree days add up how far each day’s average falls below (heating) or rises above (cooling) 65° over a year. Source: NOAA station normals.
Year to year
How much a month can swing
A normal is an average. December swings the most: from 1991 to 2020 its average ranged from 30° to 49°. September is the most reliable, staying within 7°.
10°
20°
30°
40°
50°
60°
70°
80°
90°
JanFebMarAprMayJunJulAugSepOctNovDec
Coldest to warmest month in 30 yearsNormal
Common questions about Brentwood’s climate
What is the coldest month in Brentwood?
January, with a typical high of 40° and a low of 24°.
What is the hottest month in Brentwood?
July, with a typical high of 84° and a low of 66°. About 8 days a year reach 90°.
How much snow does Brentwood get?
About 32 inches in a normal winter, most of it in January.
When is the first frost in Brentwood?
In half of years the first 32° night comes by November 2, and the last spring frost by April 10.
What is the rainiest month in Brentwood?
December, with 4.4 inches of rain and melted snow. The year totals 45 inches.
Neighbors talk weather
Gardens, snow, and the best days of the year in Brentwood.
Temperatures and rainfall come from NOAA’s gridded climate normals for Brentwood itself (about a 3-mile square). Snow, frost dates and day counts come from NOAA’s weather station at Islip Li Macarthur Airport, NY (8 mi) away. Normals are 30-year averages, not a forecast. Source: NOAA NCEI U.S. Climate Normals, 1991–2020 and 1901–2000. Today’s forecast: National Weather Service.