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Climate in Commack · NOAA 1991–2020 normals

Commack has chilly, snowy winters and warm summers

A typical July afternoon reaches 84°, a January night drops to 24°, and about 32 inches of snow falls in a normal winter.

July high
84°
348th hottest of 2,223 New York towns
January low
24°
275th mildest of 2,223 New York towns
Rain + melted snow
46"
663rd wettest of 2,223 New York towns
Snow a winter
32"
349th least snowy of 2,158 New York towns
Frost-free days
215
Apr 9 to Nov 10
90° days
11
in a normal year

A year in Commack at a glance

Each month’s typical high and low, and what it brings.

Jan39°24° 10" snow
Feb42°25° 9" snow
Mar49°31° 7" snow
Apr60°40° Last frost ~9
May69°49° Nice out
Jun79°59° Nice out
Jul84°66° Nice out6 days 90°+
Aug82°64° Nice out
Sep75°57° Nice out
Oct now65°46° Nice out
Nov54°37° First frost ~10
Dec44°29° 5" snowWettest

What stands out about Commack’s climate

Read from where Commack sits among New York’s towns. The page puts what stands out first.

Warming faster than most of NYThe last 30 years averaged 2.3° warmer than the 1900s.A long growing seasonAbout 215 frost-free days, from Apr 9 to Nov 10.Milder winters for NYJanuary nights bottom out around 24°, the 275th mildest of 2,223 New York towns.Warmer summers for NYJuly afternoons reach 84°, and about 11 days a year hit 90°.
★ What stands out · Then and now

Warmer than it used to be

The last 30 years in Commack 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+2.0°now 56°, was 54°

Change by month

JanFebMarAprMayJunJulAugSepOctNovDec
Living here

Living with Commack’s climate

What the numbers mean for a garden, a driveway, a furnace and a free afternoon.

The garden window

215 frost-free days. The last frost comes by Apr 9 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 10.

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 86% of the year’s heating-and-cooling load.

Summer heat

About 11 days a year reach 90°, and July afternoons average 84°.

Get outside

The nicest months are May, June, July, August, September and October. 5.8 miles of trails are waiting.

Parks & trails →
Storms and extremes

Normals are averages. Ice storms, nor’easters, floods and heat waves are on the natural hazards page.

Natural hazards →
A normal year

What a year in Commack 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 9
Summer
82° / 63°
11 days reach 90°
Fall
65° / 47°
First frost around Nov 10
Best months to be outsideMayJunJulAugSepOctHighs of 62–84° and lows of 40° or more
Frost & heat

About 215 frost-free days a year

In half of years the last 32° night comes by April 9 and the first by November 10.

88
nights at or below 32° in a normal year
<1
nights below 0° in a normal year
11
days that reach 90° in a normal year

Freezing nights by month

Average nights at or below 32°

24
JFMAMJJASOND

90° days by month

Average days at 90° or more

6.2
JFMAMJJASOND
Rain & snow

32 inches of snow, 46 of rain and melt

December is the wettest month and February the driest. Rain or snow falls on about 122 days a year.

46"
Rain + melted snow a year
663rd wettest of 2,223 New York towns
More than 72% of U.S. towns
32"
Snow in a normal winter
349th least snowy of 2,158 New York towns
More than 59% of U.S. towns
23 days
With 1"+ of snow on the ground
223rd least snowy of 1,653 New York towns
Less than 56% of U.S. towns

Rain + melted snow by month

Inches of water

4.4"
JFMAMJJASOND

Snowfall by month

Inches of snow

10"
JFMAMJJASOND
Next door

Commack and its neighbors

Hauppauge has the coldest January nights next door (23°) and Hauppauge the hottest July afternoons (84°). Tap a town to see its climate.

Brookhaven: January low 23°, July high 83°Stony Brook: January low 25°, July high 83°Head of the Harbor: January low 25°, July high 83°Lake Ronkonkoma: January low 23°, July high 84°St. James: January low 25°, July high 83°Ronkonkoma: January low 23°, July high 84°Melville: January low 24°, July high 84°Babylon: January low 26°, July high 83°Deer Park: January low 24°, July high 84°South Huntington: January low 24°, July high 84°Wheatley Heights: January low 24°, July high 84°Fort Salonga: January low 24°, July high 84°Nissequogue: January low 25°, July high 83°Islandia: January low 23°, July high 84°Nesconset: January low 24°, July high 83°Central Islip: January low 25°, July high 83°Oyster Bay: January low 24°, July high 84°Lloyd Harbor: January low 25°, July high 84°Cold Spring Harbor: January low 25°, July high 84°Laurel Hollow: January low 25°, July high 84°North Bay Shore: January low 24°, July high 84°Baywood: January low 24°, July high 84°West Islip: January low 25°, July high 84°Babylon: January low 25°, July high 84°Bayport: January low 25°, July high 82°Great River: January low 25°, July high 83°West Sayville: January low 25°, July high 83°North Babylon: January low 25°, July high 84°Greenlawn: January low 24°, July high 84°Huntington Station: January low 24°, July high 84°Northport: January low 25°, July high 84°Centerport: January low 25°, July high 84°Smithtown: January low 25°, July high 83°Dix Hills: January low 24°, July high 84°Kings Park: January low 25°, July high 83°Hauppauge: January low 23°, July high 84°Huntington: January low 25°, July high 84°Brentwood: January low 24°, July high 84°Islip: January low 26°, July high 83°Elwood: January low 24°, July high 84°East Northport: January low 24°, July high 84°Commack: January low 24°, July high 84° CommackSmithtownDix HillsKings ParkHauppaugeHuntingtonBrentwoodIslipElwoodEast Northport
ColderMilder23° to 26°
Hauppauge23.4° −0.2°
Dix Hills23.5° −0.1°
Commack23.6°
Brentwood24.1° +0.5°
Elwood24.3° +0.7°
East Northport24.3° +0.7°
Smithtown24.7° +1.1°
Kings Park24.9° +1.3°
Huntington25.0° +1.4°
Islip25.5° +1.9°

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 Commack compares

Against every U.S. town on TownTapestry, each counted once, with its place in New York.

Summer heat84° July high
Cooler than 57% of U.S. towns348th hottest of 2,223 New York towns
Winter cold24° January low
Milder than 69% of U.S. towns275th mildest of 2,223 New York towns
Precipitation46" a year
Wetter than 72% of U.S. towns663rd wettest of 2,223 New York towns
Snow32" a winter
Snowier than 59% of U.S. towns349th least snowy of 2,158 New York towns
Growing season215 frost-free days
Longer than 80% of U.S. towns119th longest of 2,222 New York towns
Snowiest, mildest, wettest and more in NY →
Month by month

Commack weather by month

Average highs, lows, rain and snow for every month, from NOAA’s 1991–2020 normals.

MonthHighLowRain + meltSnowWet daysSnow on ground30-yr range
January39°24°3.4" 10.3"11724° – 38°
February42°25°3.0" 9.4"10921° – 39°
March49°31°4.3" 6.5"11435° – 48°
April60°40°4.0" 0.6"11046° – 54°
May69°49°3.5" 012055° – 63°
June79°59°4.0" 010066° – 72°
July84°66°3.5" 09070° – 78°
August82°64°3.9" 09069° – 77°
September75°57°4.0" 09064° – 70°
October65°46°4.2" 09051° – 62°
November54°37°3.5" 0.5"10040° – 50°
December44°29°4.4" 4.5"12330° – 48°
Year62°44°45.7"31.8"12223
Heating & cooling

Heating and cooling a home in Commack

86% of the work is heating, so the furnace matters far more than the air conditioner.

86%heating
5,218 heating degree daysLess heating than 62% of U.S. towns
855 cooling degree daysMore cooling than 51% 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 48°. June is the most reliable, staying within 7°.

Coldest to warmest month in 30 yearsNormal

Common questions about Commack’s climate

What is the coldest month in Commack?

January, with a typical high of 39° and a low of 24°.

What is the hottest month in Commack?

July, with a typical high of 84° and a low of 66°. About 11 days a year reach 90°.

How much snow does Commack get?

About 32 inches in a normal winter, most of it in January.

When is the first frost in Commack?

In half of years the first 32° night comes by November 10, and the last spring frost by April 9.

What is the rainiest month in Commack?

December, with 4.4 inches of rain and melted snow. The year totals 46 inches.

Neighbors talk weather

Gardens, snow, and the best days of the year in Commack.

Town Square →
Weigh in
Is Commack’s weather one of its best features?

Your answer becomes a post in Town Square.

Ask your neighbors

Temperatures and rainfall come from NOAA’s gridded climate normals for Commack itself (about a 3-mile square). Snow, frost dates and day counts come from NOAA’s weather station at Islip Li Macarthur Airport, NY (10 mi, snow) and Centerport, NY (5 mi, frost, heat and degree days). 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.

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