2025 Compare Climate & Weather:
Union Gap, WA vs Groton, CT

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Highlights

On average, there are 204 sunny days per year in Groton. Union Gap averages 202 sunny days per year. The US average is 205 sunny days.

Groton, Connecticut gets 47.9 inches of rain, on average, per year. Union Gap, Washington gets 8.5 inches of rain, on average, per year. The US average is 38.1 inches of rain per year.

Groton averages 26.6 inches of snow per year. Union Gap averages 17.9 inches of snow per year. The US average is 27.8 inches of snow per year.

Weather Highlights

Groton, Connecticut
Summer High: the July high is around 79.6 degrees
Winter Low: the January low is 21.7
Rain: averages 47.9 inches of rain a year
Snow: averages 26.6 inches of snow a year

Union Gap, Washington
Summer High: the July high is around 88.1 degrees
Winter Low: the January low is 24.5
Rain: averages 8.5 inches of rain a year
Snow: averages 17.9 inches of snow a year

BestPlaces Comfort Index

Groton

The annual BestPlaces Comfort Index for Groton is 7.1 (10=best), which means it is more comfortable than most places in Connecticut.

7.1 / 10

June, September and August are the most pleasant months in Groton, while January and February are the least comfortable months.

Union Gap

The annual BestPlaces Comfort Index for Union Gap is 7.3 (10=best), which means it is more comfortable than most places in Washington.

7.3 / 10

June, September and August are the most pleasant months in Union Gap, while December and January are the least comfortable months.

Average Monthly High / Low (°F)

Month	Union Gap, WA	Groton, CT
January	39° / 25°	38° / 22°
February	48° / 27°	40° / 24°
March	57° / 32°	47° / 30°
April	65° / 37°	56° / 39°
May	73° / 44°	66° / 48°
June	80° / 51°	74° / 58°
July	88° / 56°	80° / 64°
August	87° / 55°	79° / 63°
September	79° / 47°	73° / 56°
October	64° / 37°	62° / 44°
November	49° / 29°	53° / 37°
December	36° / 23°	43° / 27°

Hot, Freezing, Rainy, Snowy Days: Union Gap / Groton

Month	Hot Days	Freezing Days	Rainy Days	Snowy Days
January	0 / 0	26 / 26	10 / 10	4 / 4
February	0 / 0	22 / 23	7 / 9	2 / 3
March	0 / 0	16 / 19	6 / 11	0 / 2
April	0 / 0	6 / 4	6 / 11	0 / 0
May	1 / 0	1 / 0	7 / 11	0 / 0
June	2 / 0	0 / 0	5 / 10	0 / 0
July	13 / 1	0 / 0	2 / 9	0 / 0
August	11 / 0	0 / 0	3 / 9	0 / 0
September	2 / 0	0 / 0	3 / 9	0 / 0
October	0 / 0	7 / 2	6 / 9	0 / 0
November	0 / 0	19 / 10	9 / 10	1 / 0
December	0 / 0	27 / 22	11 / 11	5 / 2

July is the hottest month for Union Gap with an average high temperature of 88.1°, which ranks it as one of the hottest places in Washington. In Union Gap, there are 3 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for Union Gap are September, June and May.

July is the hottest month for Groton with an average high temperature of 79.6°, which ranks it as one of the coolest places in Connecticut. In Groton, there are 4 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for Groton are August, July and June.

December has the coldest nighttime temperatures for Union Gap with an average of 23.2°. This is colder than most places in Washington.

January has the coldest nighttime temperatures for Groton with an average of 21.7°. This is one of the warmest places in Connecticut.

In Union Gap, there are 28.3 days annually when the high temperature is over 90°, which is hotter than most places in Washington.

In Groton, there are 1.7 days annually when the high temperature is over 90°, which is one of the coolest places in Connecticut.

In Union Gap, there are 124.2 days annually when the nighttime low temperature falls below freezing, which is colder than most places in Washington.

In Groton, there are 106.2 days annually when the nighttime low temperature falls below freezing, which is warmer than most places in Connecticut.

In Union Gap, there are 0.6 days annually when the nighttime low temperature falls below zero°, which is colder than most places in Washington.

In Groton, there are 0.9 days annually when the nighttime low temperature falls below zero°, which is warmer than most places in Connecticut.

December is the wettest month in Union Gap with 1.4 inches of rain, and the driest month is July with 0.2 inches. The wettest season is Spring with 38% of yearly precipitation and 14% occurs in Autumn, which is the driest season. The annual rainfall of 8.5 inches in Union Gap means that it is one of the driest places in Washington.

March is the wettest month in Groton with 4.7 inches of rain, and the driest month is February with 3.1 inches. The wettest season is Summer with 27% of yearly precipitation and 22% occurs in Spring, which is the driest season. The annual rainfall of 47.9 inches in Groton means that it is drier than most places in Connecticut.

December is the rainiest month in Union Gap with 10.8 days of rain, and July is the driest month with only 2.2 rainy days. There are 73.6 rainy days annually in Union Gap, which is one of the least rainy places in Washington. The rainiest season is Spring when it rains 37% of the time and the driest is Autumn with only a 13% chance of a rainy day.

May is the rainiest month in Groton with 11.4 days of rain, and August is the driest month with only 8.8 rainy days. There are 118.6 rainy days annually in Groton, which is about average compared to other places in Connecticut. The rainiest season is Summer when it rains 28% of the time and the driest is Autumn with only a 23% chance of a rainy day.

An annual snowfall of 17.9 inches in Union Gap means that it is snowier than most places in Washington.

An annual snowfall of 26.6 inches in Groton means that it is less snowy than most places in Connecticut.

December is the snowiest month in Union Gap with 8.3 inches of snow, and 5 months of the year have significant snowfall.

February is the snowiest month in Groton with 7.8 inches of snow, and 6 months of the year have significant snowfall.

DID YOU KNOW?

Many people confuse Weather and Climate, but they are different. Weather refers to the conditions of the atmosphere over a short period of time, while Climate refers to the conditions of the atmosphere over a long period of time.

Weather, more specifically, refers to how the atmosphere behaves and its effects on life and human activities. Most people think of Weather in terms of what can be observed: temperature, humidity, precipitation, and cloudy/sunny conditions. Weather conditions constantly change on a minute-to-minute basis.

Climate is a record of the average weather conditions for a given place over a long period of time, often referred to as Climate Normals. A 30-year period of record is a common requirement to be considered a Climate Normal.

Reviews for Union Gap 2 Reviews

Jill · Sherman Oaks, CA

re:

Over 16 years ago

Hi. I'd like to know if you still feel the same way about living in Broomfield. I went there this past July to check it out (along with Lafayette, Boulder (can't More

| Reply

NC For Me · Apex, NC

re:

Over 16 years ago

Apex is perfect for what you are looking for. It's close enough to Raleigh, Durham, Chapel Hill to find a job and Cary the next town over, is a little more expensive but More

| Reply

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Reviews for Groton 2 Reviews

Jill · Sherman Oaks, CA

re:

Over 16 years ago

Hi. I'd like to know if you still feel the same way about living in Broomfield. I went there this past July to check it out (along with Lafayette, Boulder (can't More

| Reply

NC For Me · Apex, NC

re:

Over 16 years ago

Apex is perfect for what you are looking for. It's close enough to Raleigh, Durham, Chapel Hill to find a job and Cary the next town over, is a little more expensive but More

| Reply

Start Your Review of Groton

See all reviews

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Zips In Union Gap, Washington

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2025 Compare Climate & Weather:
Union Gap, WA vs Groton, CT

Highlights

Weather Highlights

BestPlaces Comfort Index

Average Monthly High / Low (°F)

Hot, Freezing, Rainy, Snowy Days: Union Gap / Groton

December has the coldest nighttime temperatures for Union Gap with an average of 23.2°. This is colder than most places in Washington.

January has the coldest nighttime temperatures for Groton with an average of 21.7°. This is one of the warmest places in Connecticut.

In Union Gap, there are 28.3 days annually when the high temperature is over 90°, which is hotter than most places in Washington.

In Groton, there are 1.7 days annually when the high temperature is over 90°, which is one of the coolest places in Connecticut.

In Union Gap, there are 124.2 days annually when the nighttime low temperature falls below freezing, which is colder than most places in Washington.

In Groton, there are 106.2 days annually when the nighttime low temperature falls below freezing, which is warmer than most places in Connecticut.

In Union Gap, there are 0.6 days annually when the nighttime low temperature falls below zero°, which is colder than most places in Washington.

In Groton, there are 0.9 days annually when the nighttime low temperature falls below zero°, which is warmer than most places in Connecticut.

An annual snowfall of 17.9 inches in Union Gap means that it is snowier than most places in Washington.

An annual snowfall of 26.6 inches in Groton means that it is less snowy than most places in Connecticut.

December is the snowiest month in Union Gap with 8.3 inches of snow, and 5 months of the year have significant snowfall.

February is the snowiest month in Groton with 7.8 inches of snow, and 6 months of the year have significant snowfall.

DID YOU KNOW?

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Reviews for Groton 2 Reviews

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2025 Compare Climate & Weather:Union Gap, WA vs Groton, CT

Highlights

Weather Highlights

BestPlaces Comfort Index

Average Monthly High / Low (°F)

Hot, Freezing, Rainy, Snowy Days: Union Gap / Groton

December has the coldest nighttime temperatures for Union Gap with an average of 23.2°. This is colder than most places in Washington.January has the coldest nighttime temperatures for Groton with an average of 21.7°. This is one of the warmest places in Connecticut.

In Union Gap, there are 28.3 days annually when the high temperature is over 90°, which is hotter than most places in Washington.In Groton, there are 1.7 days annually when the high temperature is over 90°, which is one of the coolest places in Connecticut.

In Union Gap, there are 124.2 days annually when the nighttime low temperature falls below freezing, which is colder than most places in Washington.In Groton, there are 106.2 days annually when the nighttime low temperature falls below freezing, which is warmer than most places in Connecticut.

In Union Gap, there are 0.6 days annually when the nighttime low temperature falls below zero°, which is colder than most places in Washington.In Groton, there are 0.9 days annually when the nighttime low temperature falls below zero°, which is warmer than most places in Connecticut.

An annual snowfall of 17.9 inches in Union Gap means that it is snowier than most places in Washington.An annual snowfall of 26.6 inches in Groton means that it is less snowy than most places in Connecticut.

December is the snowiest month in Union Gap with 8.3 inches of snow, and 5 months of the year have significant snowfall.February is the snowiest month in Groton with 7.8 inches of snow, and 6 months of the year have significant snowfall.

DID YOU KNOW?

Reviews for Union Gap 2 Reviews

Reviews for Groton 2 Reviews

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2025 Compare Climate & Weather:
Union Gap, WA vs Groton, CT

December has the coldest nighttime temperatures for Union Gap with an average of 23.2°. This is colder than most places in Washington.

January has the coldest nighttime temperatures for Groton with an average of 21.7°. This is one of the warmest places in Connecticut.

In Union Gap, there are 28.3 days annually when the high temperature is over 90°, which is hotter than most places in Washington.

In Groton, there are 1.7 days annually when the high temperature is over 90°, which is one of the coolest places in Connecticut.

In Union Gap, there are 124.2 days annually when the nighttime low temperature falls below freezing, which is colder than most places in Washington.

In Groton, there are 106.2 days annually when the nighttime low temperature falls below freezing, which is warmer than most places in Connecticut.

In Union Gap, there are 0.6 days annually when the nighttime low temperature falls below zero°, which is colder than most places in Washington.

In Groton, there are 0.9 days annually when the nighttime low temperature falls below zero°, which is warmer than most places in Connecticut.

An annual snowfall of 17.9 inches in Union Gap means that it is snowier than most places in Washington.

An annual snowfall of 26.6 inches in Groton means that it is less snowy than most places in Connecticut.

December is the snowiest month in Union Gap with 8.3 inches of snow, and 5 months of the year have significant snowfall.

February is the snowiest month in Groton with 7.8 inches of snow, and 6 months of the year have significant snowfall.