2025 Compare Climate & Weather:
Boulder, CO vs The Dalles, OR

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Highlights

On average, there are 177 sunny days per year in The Dalles. Boulder averages 245 sunny days per year. The US average is 205 sunny days.

The Dalles, Oregon gets 18.4 inches of rain, on average, per year. Boulder, Colorado gets 18.1 inches of rain, on average, per year. The US average is 38.1 inches of rain per year.

The Dalles averages 13.7 inches of snow per year. Boulder averages 71.1 inches of snow per year. The US average is 27.8 inches of snow per year.

Weather Highlights

The Dalles, Oregon
Summer High: the July high is around 86.4 degrees
Winter Low: the January low is 30.1
Rain: averages 18.4 inches of rain a year
Snow: averages 13.7 inches of snow a year

Boulder, Colorado
Summer High: the July high is around 88.1 degrees
Winter Low: the January low is 18.9
Rain: averages 18.1 inches of rain a year
Snow: averages 71.1 inches of snow a year

BestPlaces Comfort Index

The Dalles

The annual BestPlaces Comfort Index for The Dalles is 7.5 (10=best), which means it is more comfortable than most places in Oregon.

7.5 / 10

June, July and September are the most pleasant months in The Dalles, while January and December are the least comfortable months.

Boulder

The annual BestPlaces Comfort Index for Boulder is 7.1 (10=best), which means it is about average compared to other places in Colorado.

7.1 / 10

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

Average Monthly High / Low (°F)

Month	Boulder, CO	The Dalles, OR
January	47° / 19°	43° / 30°
February	48° / 20°	48° / 31°
March	55° / 27°	57° / 35°
April	62° / 34°	64° / 40°
May	72° / 43°	72° / 47°
June	82° / 51°	78° / 53°
July	88° / 57°	86° / 58°
August	86° / 55°	87° / 57°
September	78° / 46°	80° / 49°
October	66° / 36°	66° / 40°
November	54° / 26°	51° / 34°
December	45° / 18°	41° / 30°

Hot, Freezing, Rainy, Snowy Days: Boulder / The Dalles

Month	Hot Days	Freezing Days	Rainy Days	Snowy Days
January	0 / 0	28 / 18	5 / 15	5 / 3
February	0 / 0	25 / 15	5 / 12	5 / 2
March	0 / 0	23 / 9	7 / 12	6 / 0
April	0 / 0	13 / 3	9 / 9	4 / 0
May	1 / 1	2 / 0	11 / 7	1 / 0
June	6 / 4	0 / 0	9 / 5	0 / 0
July	14 / 11	0 / 0	9 / 2	0 / 0
August	9 / 11	0 / 0	10 / 2	0 / 0
September	3 / 5	1 / 0	7 / 4	0 / 0
October	0 / 0	10 / 4	6 / 8	2 / 0
November	0 / 0	22 / 10	5 / 15	4 / 1
December	0 / 0	28 / 18	5 / 15	5 / 3

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

August is the hottest month for The Dalles with an average high temperature of 86.6°, which ranks it as warmer than most places in Oregon. In The Dalles, there are 3 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for The Dalles are June, September and May.

December has the coldest nighttime temperatures for Boulder with an average of 18.3°. This is one of the warmest places in Colorado.

December has the coldest nighttime temperatures for The Dalles with an average of 29.5°. This is colder than most places in Oregon.

In Boulder, there are 32.4 days annually when the high temperature is over 90°, which is about average compared to other places in Colorado.

In The Dalles, there are 32.7 days annually when the high temperature is over 90°, which is hotter than most places in Oregon.

In Boulder, there are 151.2 days annually when the nighttime low temperature falls below freezing, which is warmer than most places in Colorado.

In The Dalles, there are 77.5 days annually when the nighttime low temperature falls below freezing, which is colder than most places in Oregon.

In Boulder, there are 5.5 days annually when the nighttime low temperature falls below zero°, which is warmer than most places in Colorado.

In The Dalles, there are 0.3 days annually when the nighttime low temperature falls below zero°, which is colder than most places in Oregon.

May is the wettest month in Boulder with 2.5 inches of rain, and the driest month is January with 0.6 inches. The wettest season is Summer with 37% of yearly precipitation and 11% occurs in Spring, which is the driest season. The annual rainfall of 18.1 inches in Boulder means that it is wetter than most places in Colorado.

December is the wettest month in The Dalles with 3.6 inches of rain, and the driest month is July with 0.2 inches. The wettest season is Spring with 49% of yearly precipitation and 6% occurs in Autumn, which is the driest season. The annual rainfall of 18.4 inches in The Dalles means that it is drier than most places in Oregon.

May is the rainiest month in Boulder with 10.5 days of rain, and January is the driest month with only 4.7 rainy days. There are 88.0 rainy days annually in Boulder, which is rainier than most places in Colorado. The rainiest season is Autumn when it rains 31% of the time and the driest is Spring with only a 17% chance of a rainy day.

November is the rainiest month in The Dalles with 15.3 days of rain, and July is the driest month with only 1.7 rainy days. There are 105.0 rainy days annually in The Dalles, which is less rainy than most places in Oregon. The rainiest season is Spring when it rains 40% of the time and the driest is Autumn with only a 8% chance of a rainy day.

An annual snowfall of 71.1 inches in Boulder means that it is snowier than most places in Colorado.

An annual snowfall of 13.7 inches in The Dalles means that it is snowier than most places in Oregon.

March is the snowiest month in Boulder with 14.3 inches of snow, and 9 months of the year have significant snowfall.

January is the snowiest month in The Dalles with 4.8 inches of snow, and 5 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 Boulder 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

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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

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Reviews for The Dalles 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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2025 Compare Climate & Weather:
Boulder, CO vs The Dalles, OR

Highlights

Weather Highlights

BestPlaces Comfort Index

Average Monthly High / Low (°F)

Hot, Freezing, Rainy, Snowy Days: Boulder / The Dalles

December has the coldest nighttime temperatures for Boulder with an average of 18.3°. This is one of the warmest places in Colorado.

December has the coldest nighttime temperatures for The Dalles with an average of 29.5°. This is colder than most places in Oregon.

In Boulder, there are 32.4 days annually when the high temperature is over 90°, which is about average compared to other places in Colorado.

In The Dalles, there are 32.7 days annually when the high temperature is over 90°, which is hotter than most places in Oregon.

In Boulder, there are 151.2 days annually when the nighttime low temperature falls below freezing, which is warmer than most places in Colorado.

In The Dalles, there are 77.5 days annually when the nighttime low temperature falls below freezing, which is colder than most places in Oregon.

In Boulder, there are 5.5 days annually when the nighttime low temperature falls below zero°, which is warmer than most places in Colorado.

In The Dalles, there are 0.3 days annually when the nighttime low temperature falls below zero°, which is colder than most places in Oregon.

An annual snowfall of 71.1 inches in Boulder means that it is snowier than most places in Colorado.

An annual snowfall of 13.7 inches in The Dalles means that it is snowier than most places in Oregon.

March is the snowiest month in Boulder with 14.3 inches of snow, and 9 months of the year have significant snowfall.

January is the snowiest month in The Dalles with 4.8 inches of snow, and 5 months of the year have significant snowfall.

DID YOU KNOW?

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Reviews for The Dalles 2 Reviews

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2025 Compare Climate & Weather:Boulder, CO vs The Dalles, OR

Highlights

Weather Highlights

BestPlaces Comfort Index

Average Monthly High / Low (°F)

Hot, Freezing, Rainy, Snowy Days: Boulder / The Dalles

December has the coldest nighttime temperatures for Boulder with an average of 18.3°. This is one of the warmest places in Colorado.December has the coldest nighttime temperatures for The Dalles with an average of 29.5°. This is colder than most places in Oregon.

In Boulder, there are 32.4 days annually when the high temperature is over 90°, which is about average compared to other places in Colorado.In The Dalles, there are 32.7 days annually when the high temperature is over 90°, which is hotter than most places in Oregon.

In Boulder, there are 151.2 days annually when the nighttime low temperature falls below freezing, which is warmer than most places in Colorado.In The Dalles, there are 77.5 days annually when the nighttime low temperature falls below freezing, which is colder than most places in Oregon.

In Boulder, there are 5.5 days annually when the nighttime low temperature falls below zero°, which is warmer than most places in Colorado.In The Dalles, there are 0.3 days annually when the nighttime low temperature falls below zero°, which is colder than most places in Oregon.

An annual snowfall of 71.1 inches in Boulder means that it is snowier than most places in Colorado.An annual snowfall of 13.7 inches in The Dalles means that it is snowier than most places in Oregon.

March is the snowiest month in Boulder with 14.3 inches of snow, and 9 months of the year have significant snowfall.January is the snowiest month in The Dalles with 4.8 inches of snow, and 5 months of the year have significant snowfall.

DID YOU KNOW?

Reviews for Boulder 2 Reviews

Reviews for The Dalles 2 Reviews

Most Recent Searches On Compare Climate & Weather

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Zips In Boulder, Colorado

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2025 Compare Climate & Weather:
Boulder, CO vs The Dalles, OR

December has the coldest nighttime temperatures for Boulder with an average of 18.3°. This is one of the warmest places in Colorado.

December has the coldest nighttime temperatures for The Dalles with an average of 29.5°. This is colder than most places in Oregon.

In Boulder, there are 32.4 days annually when the high temperature is over 90°, which is about average compared to other places in Colorado.

In The Dalles, there are 32.7 days annually when the high temperature is over 90°, which is hotter than most places in Oregon.

In Boulder, there are 151.2 days annually when the nighttime low temperature falls below freezing, which is warmer than most places in Colorado.

In The Dalles, there are 77.5 days annually when the nighttime low temperature falls below freezing, which is colder than most places in Oregon.

In Boulder, there are 5.5 days annually when the nighttime low temperature falls below zero°, which is warmer than most places in Colorado.

In The Dalles, there are 0.3 days annually when the nighttime low temperature falls below zero°, which is colder than most places in Oregon.

An annual snowfall of 71.1 inches in Boulder means that it is snowier than most places in Colorado.

An annual snowfall of 13.7 inches in The Dalles means that it is snowier than most places in Oregon.

March is the snowiest month in Boulder with 14.3 inches of snow, and 9 months of the year have significant snowfall.

January is the snowiest month in The Dalles with 4.8 inches of snow, and 5 months of the year have significant snowfall.