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Brooklyn, CT Weather
Brooklyn, Connecticut sits at 41.7872, -71.9574. Its warmest month is July, when the day usually reaches 81F, and its coldest is January, when the night usually falls to 18F. May is the wettest, with rain on about 14 days. The hottest day in the record is 97F on July 22, 2019, and the coldest night -14F on February 14, 2016. This page carries live conditions, an hour by hour timeline, a ten day outlook, radar, monthly averages and searchable daily history back to 1940.
About Brooklyn weather
Brooklyn sits at 41.7872, -71.9574 and covers about 29.1 square miles. The forecast above is live: current conditions lead with the HRRR model, corrected against the nearest reporting station and against radar overhead, because a model can lag a storm and the radar cannot.
The tabs at the top of this page carry the hour by hour timeline, the ten day outlook and live radar. Where the models disagree about a day, the rock says so on the day rather than quietly picking a winner.
The rock grades itself against what actually happened and publishes the result whether it flatters it or not. Those standings live in the Receipts, in one place, so they stay current instead of going stale on three hundred town pages.
Where these numbers come from
Current conditions and forecast: NOAA forecast grids (the National Weather Service digital forecast, the National Blend of Models, HRRR and GFS) decoded on our own server, corrected against the nearest reporting station and our own radar. Open-Meteo is consulted only as a fallback when our server is silent.
Monthly averages and records: computed by myweatherrock from NOAA GHCN-Daily station records at the nearest qualifying station, named on this page with its distance. Measurements, not estimates.
Daily history search: the town's own NOAA GHCN-Daily station file, held on our server, measurements by day. Months the station missed fall back to the Open-Meteo historical archive (reanalysis), and the page says so when it does.
Water and tides:NOAA and USGS gauges where one is near.
What the weather is usually like in Brooklyn
Brooklyn is warmest in July, when the day usually reaches 81F, and coldest in January, when the night usually falls to 18F. May is the wettest month, with rain on about 14 days of it.
Usual high and low, by month
Days with rain, by month
The same year as numbers
Month
Usual high
Usual low
Rain days
Snow days
January
36F
18F
9
3
February
38F
18F
10
4
March
46F
25F
10
3
April
58F
35F
13
1
May
69F
46F
14
0
June
75F
54F
13
0
July
81F
61F
11
0
August
79F
58F
10
0
September
73F
52F
9
0
October
62F
41F
12
0
November
52F
31F
10
0
December
41F
24F
12
2
Thirty-year normals, 1991 to 2020, computed from the daily record, measured at the Hampton station 5.1 miles away. A rain day means at least a hundredth of an inch fell, the same measurable-precipitation mark the Weather Service uses. Source: computed from the station record, NOAA GHCN daily.
Brooklyn weather history, back to 1940
Pick any month back to 1940 and see what actually happened in Brooklyn. Reanalysis fitted to observations, not a forecast.
Reading this month last year to start you off.
Brooklyn weather records
In 28,542 days of observations Brooklyn has been as hot as 97F and as cold as -14F. Not averages: the actual days.
Hottest day
97F
July 22, 2019
Coldest night
-14F
February 14, 2016
Wettest day
4.99 in
September 26, 2018
Biggest snow
24.0 in
February 9, 2013
NOAA GHCN daily station records, observed 2006 to 2026: temperature at the Hampton station, 5.1 miles away. Station measurements, not estimates. Record dates reflect the station's own observation schedule, and the official state record may live at a different station.
Common questions about Brooklyn weather
Common questions
What is the weather usually like in Brooklyn, CT?
Brooklyn is warmest in July, when the day usually reaches 81F, and coldest in January, when the night usually falls to 18F. Rain falls on roughly 133 days a year, most often in May. Averages are thirty-year normals, 1991 to 2020, computed from the nearest NOAA station's own daily record.
How much does it rain in Brooklyn, CT?
About 133 days a year see at least a hundredth of an inch, which is the Weather Service's measurable-precipitation mark. May is the wettest month with rain on about 14 of its days, and January the driest with about 9.
Does it snow in Brooklyn, CT?
Yes. Snow falls on about 13 days a year, most often in February, which averages about 4 snowy days. Those are days with measurable snowfall, not days with snow lying on the ground.
What is the hottest it has ever been in Brooklyn, CT?
The hottest day measured at the station serving Brooklyn reached 97F on July 22, 2019, and the coldest night -14F on February 14, 2016. Both are real NOAA station measurements from the GHCN daily archive, observed 2006 to 2026, at the Hampton station. Not estimates, though the official state record may live at a different station.
Can I look up past weather for Brooklyn, CT?
Yes, and for free. The History tab on this page takes any month back to 1940 and shows every day of it: the high, the low, what fell, and that month's hottest and coldest day. No account and no payment.
Is the Brooklyn forecast on this page free, and does it track me?
It is free, carries no advertising, and needs no account. Nothing about a visitor leaves the device except the coordinates needed to fetch a forecast, and those are not stored against anyone.