Climate · Brooklin

Brooklin, ME climate

Brooklin has cold, snowy winters and pleasant summers, with plenty of rain. A typical July afternoon reaches 77°, a January night drops to 14°, and about 72 inches of snow falls in a normal winter.

NOAA 1991-2020 climate normals Updated once a decade
July high
77°
115th coolest of 614 Maine towns
January low
14°
87th mildest of 614 Maine towns
Rain + melted snow
49 in
108th wettest of 614 Maine towns
Snow a winter
72 in
172nd least snowy of 567 Maine towns
A normal year

What a year in Brooklin feels like

Winter

33° / 17°
Typical high / low · 18 days with an inch or more of snow

Spring

51° / 34°
Typical high / low · Last frost around Apr 27

Summer

74° / 56°
Typical high / low · 3 days reach 90° in a normal year

Fall

57° / 41°
Typical high / low · First frost around Oct 22
Best months to be outsideJunJulAugSepHighs of 62–84° and lows of 40° or more
Month by month

Brooklin weather by month

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

MonthHighLowRain + meltSnowWet days30-yr range
January31°14°4.2" 19.2"9 13° – 30°
February32°16°3.4" 22.4"7 10° – 30°
March40°24°4.1" 11.7"8 25° – 39°
April51°34°4.3" 2.2"10 39° – 47°
May62°43°3.7" 010 47° – 56°
June70°52°4.1" 010 58° – 65°
July77°58°3.2" 09 63° – 70°
August76°58°3.0" 08 64° – 70°
September68°51°3.9" 07 56° – 64°
October56°41°5.4" 0.3"10 45° – 55°
November46°32°4.9" 2.5"9 34° – 43°
December36°21°5.1" 13.2"10 22° – 36°
Year54°37°49.2"71.5"105

“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 Brooklin

Brooklin gets 49 inches of rain and melted snow a year. October is the wettest month and August the driest. Rain or snow falls on about 105 days a year.

49 in
Rain + melted snow a year
More rain than 86% of U.S. towns
72 in
Snow in a normal winter
More snow than 92% of U.S. towns
105 days
With rain or snow (0.01"+)

Rain + melted snow by month

Inches of water
5.4"

Snowfall by month

Inches of snow
22"
Frost & the growing season

About 177 frost-free days a year

In half of years the last 32° night comes by April 27 and the first one by October 22. That leaves about 177 frost-free days for gardens, shorter than 51% of U.S. towns.

141
nights at or below 32° in a normal year
9
nights below 0° in a normal year
3
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 Brooklin

Engineers use “degree days” to estimate how hard a furnace or air conditioner works. In Brooklin, 94% of that work is heating and 6% is cooling, so the furnace matters far more than the air conditioner.

94%heating
6,835 heating degree daysMore heating than 71% of U.S. towns
411 cooling degree daysLess cooling than 83% 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 Brooklin

Brooklin and its neighbors

Brooklin borders 6 towns with climate data. January nights across them vary by 3.0°. Sedgwick has both the coldest January nights (12°) and the hottest July afternoons (78°). Brooklin’s January low is 14° and its July high 77°.

Brooksville: January low 13°, July high 77°Penobscot: January low 11°, July high 79°Stonington: January low 14°, July high 76°North Haven: January low 14°, July high 75°Islesboro: January low 12°, July high 76°Southwest Harbor: January low 15°, July high 77°Mount Desert: January low 14°, July high 77°Cranberry Isles: January low 15°, July high 77°Isle au Haut: January low 15°, July high 75°Surry: January low 13°, July high 78°Sedgwick: January low 12°, July high 78°Deer Isle: January low 13°, July high 76°Tremont: January low 14°, July high 77°Frenchboro: January low 15°, July high 76°Swans Island: January low 15°, July high 76°Blue Hill: January low 13°, July high 77°Brooklin: January low 14°, July high 77° BrooklinSedgwickDeer IsleTremontFrenchboroSwans IslandBlue Hill
ColderMilder11° to 15°
Sedgwick12.1° −1.9°
Blue Hill13.0° −1.0°
Deer Isle13.2° −0.8°
Brooklin14.0°
Tremont14.4° +0.4°
Frenchboro15.0° +1.0°
Swans Island15.1° +1.1°

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

Compared with other towns

How Brooklin compares

Summer heat77° July high
Cooler than 97% of U.S. towns115th coolest of 614 Maine towns
Winter cold14° January low
Colder than 73% of U.S. towns87th mildest of 614 Maine towns
Precipitation49" a year
Wetter than 86% of U.S. towns108th wettest of 614 Maine towns
Snow72" a winter
Snowier than 92% of U.S. towns172nd least snowy of 567 Maine towns
Growing season177 frost-free days
Shorter than 51% of U.S. towns20th longest of 610 Maine towns

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

Then and now

Warmer than it used to be

+1.7°1991–2020 average vs. the 20th century (1901–2000)

The last 30 years in Brooklin averaged 1.7° warmer than the 1900s. The biggest change is in December (+3.4°). The shift is larger than in 78% of U.S. towns.

❄️ Winter+2.4° now 25°, was 23°
🌷 Spring+1.2° now 42°, was 41°
☀️ Summer+1.7° now 65°, was 63°
🍂 Fall+1.3° now 49°, was 48°

Change by month1991–2020 average minus 1901–2000 average, at Brooklin’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. February swings the most: between 1991 and 2020 its average temperature ranged from 10° to 30°. August is the most reliable, staying within 6°.

Coldest to warmest month in 30 yearsNormal
Questions

Common questions about Brooklin’s climate

What is the coldest month in Brooklin?

January, with a typical high of 31° and a low of 14°.

What is the hottest month in Brooklin?

July, with a typical high of 77° and a low of 58°. About 3 days a year reach 90°.

How much snow does Brooklin get?

About 72 inches in a normal winter, most of it in February.

When is the first frost in Brooklin?

In half of years the first 32° night comes by October 22, and the last spring frost by April 27.

What is the rainiest month in Brooklin?

October, with 5.4 inches of rain and melted snow. The year totals 49 inches.

Temperatures and rainfall come from NOAA’s gridded climate normals for Brooklin itself (about a 3-mile square). Snow, frost dates and day counts come from NOAA’s weather station at Belfast, ME (24 mi, snow) and Acadia Np, ME (16 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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