Climate · Bridgewater

Bridgewater, NJ climate

Bridgewater has chilly winters and warm summers, with plenty of rain. A typical July afternoon reaches 86°, a January night drops to 22°, and about 21 inches of snow falls in a normal winter.

NOAA 1991-2020 climate normals Updated once a decade
July high
86°
421st coolest of 941 New Jersey towns
January low
22°
231st coldest of 941 New Jersey towns
Rain + melted snow
50 in
58th wettest of 941 New Jersey towns
Snow a winter
21 in
212th least snowy of 898 New Jersey towns
A normal year

What a year in Bridgewater feels like

Winter

42° / 24°
Typical high / low · 6 days with an inch or more of snow

Spring

62° / 39°
Typical high / low · Last frost around Apr 26

Summer

84° / 61°
Typical high / low · 23 days reach 90° in a normal year

Fall

66° / 44°
Typical high / low · First frost around Oct 18
Best months to be outsideMayJunAugSepOctHighs of 62–84° and lows of 40° or more
Month by month

Bridgewater weather by month

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

MonthHighLowRain + meltSnowWet days30-yr range
January39°22°3.6" 6.8"10 22° – 38°
February42°23°2.9" 6.7"8 21° – 39°
March50°30°4.2" 3.6"10 34° – 49°
April63°39°3.9" 0.2"11 47° – 56°
May72°49°4.2" 012 56° – 66°
June81°58°4.6" 011 66° – 73°
July86°64°5.1" 010 70° – 79°
August84°62°4.6" 010 68° – 76°
September77°55°4.4" 09 63° – 71°
October65°43°4.5" 0.1"10 49° – 61°
November54°34°3.4" 0.1"9 39° – 49°
December44°27°4.4" 3.5"10 29° – 47°
Year63°42°49.6"21.0"121

“Wet days” have at least 0.01" of rain or melted snow. “Snow on ground” counts days with 1" or more. The 30-year range is the coldest and warmest that month’s average temperature got between 1991 and 2020.

Rain & snow

Rain and snow in Bridgewater

Bridgewater gets 50 inches of rain and melted snow a year. July is the wettest month and February the driest. Rain or snow falls on about 121 days a year.

50 in
Rain + melted snow a year
More rain than 87% of U.S. towns
21 in
Snow in a normal winter
Less snow than 56% of U.S. towns
121 days
With rain or snow (0.01"+)

Rain + melted snow by month

Inches of water
5.1"

Snowfall by month

Inches of snow
6.8"
Frost & the growing season

About 176 frost-free days a year

In half of years the last 32° night comes by April 26 and the first one by October 18. That leaves about 176 frost-free days for gardens, shorter than 53% of U.S. towns.

124
nights at or below 32° in a normal year
2
nights below 0° in a normal year
23
days that reach 90° in a normal year

Freezing nights by month

Average nights at or below 32°

90° days by month

Average days at 90° or more
Heating & cooling

Heating and cooling a home in Bridgewater

Engineers use “degree days” to estimate how hard a furnace or air conditioner works. In Bridgewater, 86% of that work is heating and 14% is cooling, so the furnace matters far more than the air conditioner.

86%heating
5,385 heating degree daysLess heating than 58% of U.S. towns
859 cooling degree daysMore cooling than 51% of U.S. towns

Degree days measure how far each day’s average temperature falls below or rises above 65°, added up over a year. Source: NOAA station normals.

Around Bridgewater

Bridgewater and its neighbors

Bridgewater borders 12 towns with climate data. January nights across them vary by 2.0°. Bedminster has the coldest January nights (21°) and Bound Brook the hottest July afternoons (87°). Bridgewater’s January low is 22° and its July high 86°.

Tewksbury: January low 20°, July high 85°Readington: January low 21°, July high 86°Peapack and Gladstone: January low 21°, July high 86°Far Hills: January low 21°, July high 86°Chester: January low 20°, July high 84°South Bound Brook: January low 23°, July high 87°Piscataway: January low 23°, July high 87°Dunellen: January low 22°, July high 87°Long Hill: January low 22°, July high 86°Berkeley Heights: January low 22°, July high 86°Watchung: January low 22°, July high 86°Montgomery: January low 23°, July high 87°Millstone: January low 23°, July high 87°East Amwell: January low 22°, July high 86°Raritan: January low 21°, July high 85°New Brunswick: January low 23°, July high 87°South Brunswick: January low 23°, July high 87°Rocky Hill: January low 23°, July high 87°Princeton: January low 23°, July high 86°North Brunswick: January low 23°, July high 87°Harding: January low 21°, July high 86°Bernardsville: January low 21°, July high 85°Plainfield: January low 23°, July high 87°North Plainfield: January low 23°, July high 87°Bedminster: January low 21°, July high 86°Branchburg: January low 22°, July high 86°Bound Brook: January low 23°, July high 87°Somerville: January low 22°, July high 87°Manville: January low 22°, July high 87°Middlesex: January low 23°, July high 87°Warren: January low 22°, July high 86°Hillsborough: January low 22°, July high 87°Raritan: January low 22°, July high 87°Franklin: January low 23°, July high 87°Bernards: January low 21°, July high 86°Green Brook: January low 22°, July high 87°Bridgewater: January low 22°, July high 86° BridgewaterBedminsterBranchburgBound BrookSomervilleManvilleMiddlesexWarrenHillsboroughRaritanFranklinBernardsGreen Brook
ColderMilder20° to 23°
Bedminster20.7° −0.9°
Bernards21.2° −0.4°
Branchburg21.5° −0.1°
Bridgewater21.6°
Warren21.7° +0.1°
Raritan21.9° +0.3°
Somerville22.1° +0.5°
Manville22.2° +0.6°
Hillsborough22.2° +0.6°
Green Brook22.4° +0.8°
Bound Brook22.5° +0.9°
Franklin22.5° +0.9°
Middlesex22.7° +1.1°

Temperatures and rain come from NOAA’s 5 km grid, so each town gets its own value.

Compared with other towns

How Bridgewater compares

Summer heat86° July high
Hotter than 59% of U.S. towns421st coolest of 941 New Jersey towns
Winter cold22° January low
Milder than 61% of U.S. towns231st coldest of 941 New Jersey towns
Precipitation50" a year
Wetter than 87% of U.S. towns58th wettest of 941 New Jersey towns
Snow21" a winter
Less snow than 56% of U.S. towns212th least snowy of 898 New Jersey towns
Growing season176 frost-free days
Shorter than 53% of U.S. towns202nd shortest of 941 New Jersey towns

Compared with every U.S. town and city on TownTapestry, each counted once.

Then and now

Warmer than it used to be

+2.3°1991–2020 average vs. the 20th century (1901–2000)

The last 30 years in Bridgewater averaged 2.3° warmer than the 1900s. The biggest change is in December (+3.9°). The shift is larger than in 99% of U.S. towns.

❄️ Winter+3.3° now 33°, was 30°
🌷 Spring+1.9° now 51°, was 49°
☀️ Summer+2.0° now 72°, was 70°
🍂 Fall+2.0° now 55°, was 53°

Change by month1991–2020 average minus 1901–2000 average, at Bridgewater’s spot on NOAA’s grid

Year to year

How much a month can swing

A normal is an average, and real years wander around it. December swings the most: between 1991 and 2020 its average temperature ranged from 29° to 47°. June is the most reliable, staying within 7°.

Coldest to warmest month in 30 yearsNormal
Questions

Common questions about Bridgewater’s climate

What is the coldest month in Bridgewater?

January, with a typical high of 39° and a low of 22°.

What is the hottest month in Bridgewater?

July, with a typical high of 86° and a low of 64°. About 23 days a year reach 90°.

How much snow does Bridgewater get?

About 21 inches in a normal winter, most of it in January.

When is the first frost in Bridgewater?

In half of years the first 32° night comes by October 18, and the last spring frost by April 26.

What is the rainiest month in Bridgewater?

July, with 5.1 inches of rain and melted snow. The year totals 50 inches.

Temperatures and rainfall come from NOAA’s gridded climate normals for Bridgewater itself (about a 3-mile square). Snow, frost dates and day counts come from NOAA’s weather station at Bound Brook 2w, NJ (3 mi, snow) and Somerville Somerset Airport, NJ (4 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.

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