The remote server returned an error: (400) Bad Request.The remote server returned an error: (400) Bad Request. 2025 Compare Climate & Weather: Boulder, CO vs Santa Monica, CA

2025 Compare Climate & Weather:
Boulder, CO vs Santa Monica, CA

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Highlights

On average, there are 281 sunny days per year in Santa Monica. Boulder averages 245 sunny days per year. The US average is 205 sunny days.

Santa Monica, California gets 13.7 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.

Santa Monica averages 0 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

Santa Monica, California
Summer High: the July high is around 73.5 degrees
Winter Low: the January low is 49.3
Rain: averages 13.7 inches of rain a year
Snow: averages 0 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
Santa Monica

The annual BestPlaces Comfort Index for Santa Monica is 9.2 (10=best), which means it is one of the most pleasant places in California.

9.2 / 10
August, September and July are the most pleasant months in Santa Monica, while January and February 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)
MonthBoulder, COSanta Monica, CA
January47° / 19°64° / 49°
February48° / 20°65° / 50°
March55° / 27°65° / 51°
April62° / 34°66° / 53°
May72° / 43°68° / 57°
June82° / 51°70° / 60°
July88° / 57°74° / 63°
August86° / 55°74° / 63°
September78° / 46°74° / 62°
October66° / 36°72° / 58°
November54° / 26°68° / 53°
December45° / 18°64° / 49°
Hot, Freezing, Rainy, Snowy Days: Boulder / Santa Monica
MonthHot DaysFreezing DaysRainy DaysSnowy Days
January0 / 028 / 05 / 65 / 0
February0 / 025 / 05 / 65 / 0
March0 / 023 / 07 / 56 / 0
April0 / 013 / 09 / 24 / 0
May1 / 02 / 011 / 11 / 0
June6 / 00 / 09 / 10 / 0
July14 / 00 / 09 / 00 / 0
August9 / 00 / 010 / 00 / 0
September3 / 01 / 07 / 10 / 0
October0 / 110 / 06 / 22 / 0
November0 / 022 / 05 / 34 / 0
December0 / 028 / 05 / 55 / 0
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 Santa Monica with an average high temperature of 74.3°, which ranks it as one of the coolest places in California. In Santa Monica, there are 5 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for Santa Monica are August, September and July.
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 Santa Monica with an average of 48.6°. This is one of the warmest places in California.

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 Santa Monica, there are 1.8 days annually when the high temperature is over 90°, which is one of the coolest places in California.

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 Santa Monica, there are 0.1 days annually when the nighttime low temperature falls below freezing, which is one of the warmest places in California.

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 Santa Monica, there are 0.0 days annually when the nighttime low temperature falls below zero°, which is about average compared to other places in California.

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.


February is the wettest month in Santa Monica with 3.4 inches of rain, and the driest month is August with 0.0 inches. The wettest season is Spring with 61% of yearly precipitation and 1% occurs in Autumn, which is the driest season. The annual rainfall of 13.7 inches in Santa Monica means that it is drier than most places in California.

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.

February is the rainiest month in Santa Monica with 5.9 days of rain, and August is the driest month with only 0.3 rainy days. There are 30.3 rainy days annually in Santa Monica, which is one of the least rainy places in California. The rainiest season is Spring when it rains 53% of the time and the driest is Autumn with only a 4% chance of a rainy day.

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

There is rarely any recorded snowfall in Santa Monica, ranking it as one of the least snowy places in California.
March is the snowiest month in Boulder with 14.3 inches of snow, and 9 months of the year have significant snowfall.

Any measurable snowfall is a rare occurance in Santa Monica.

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

   |    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 Boulder

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Reviews for Santa Monica    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 Santa Monica

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Zips In Boulder, Colorado
80302, 80304, 80301, 80303, 80305, 80310
Zips In SANTA MONICA, CALIFORNIA
90405, 90403, 90404, 90402, 90401
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