2025 Compare Climate & Weather:
Boulder Creek, CA vs Kalama, WA

Highlights

On average, there are 139 sunny days per year in Kalama. Boulder Creek averages 263 sunny days per year. The US average is 205 sunny days.

Kalama, Washington gets 54.7 inches of rain, on average, per year. Boulder Creek, California gets 36 inches of rain, on average, per year. The US average is 38.1 inches of rain per year.

Kalama averages 7.7 inches of snow per year. Boulder Creek averages 0 inches of snow per year. The US average is 27.8 inches of snow per year.

Weather Highlights

Kalama, Washington
Summer High: the July high is around 77.9 degrees
Winter Low: the January low is 32.5
Rain: averages 54.7 inches of rain a year
Snow: averages 7.7 inches of snow a year

Boulder Creek, California
Summer High: the July high is around 80.8 degrees
Winter Low: the January low is 38.3
Rain: averages 36 inches of rain a year
Snow: averages 0 inches of snow a year

BestPlaces Comfort Index

The annual BestPlaces Comfort Index for Kalama is 7.0 (10=best), which means it is less comfortable than most places in Washington.

The annual BestPlaces Comfort Index for Boulder Creek is 8.4 (10=best), which means it is more comfortable than most places in California.

Today's Weather - Boulder Creek, CA

53°F

Today's Weather - Kalama, WA

51°F

Average Monthly High / Low (°F)

Hot, Freezing, Rainy, Snowy Days: Boulder Creek / Kalama

August is the hottest month for Boulder Creek with an average high temperature of 81.0°, which ranks it as cooler than most places in California. In Boulder Creek, there are 6 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for Boulder Creek are June, September and July.

August is the hottest month for Kalama with an average high temperature of 78.9°, which ranks it as about average compared to other places in Washington. In Kalama, there are 4 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for Kalama are July, August and September.

December has the coldest nighttime temperatures for Boulder Creek with an average of 38.0°. This is about average compared to other places in California.

December has the coldest nighttime temperatures for Kalama with an average of 32.0°. This is colder than most places in Washington.

In Boulder Creek, there are 22.7 days annually when the high temperature is over 90°, which is cooler than most places in California.

In Kalama, there are 9.8 days annually when the high temperature is over 90°, which is hotter than most places in Washington.

In Boulder Creek, there are 19.9 days annually when the nighttime low temperature falls below freezing, which is colder than most places in California.

In Kalama, there are 63.7 days annually when the nighttime low temperature falls below freezing, which is colder than most places in Washington.

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

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

January is the wettest month in Boulder Creek with 7.2 inches of rain, and the driest month is July with 0.0 inches. The wettest season is Spring with 59% of yearly precipitation and 1% occurs in Autumn, which is the driest season. The annual rainfall of 36.0 inches in Boulder Creek means that it is wetter than most places in California.


November is the wettest month in Kalama with 8.7 inches of rain, and the driest month is July with 0.7 inches. The wettest season is Spring with 41% of yearly precipitation and 7% occurs in Autumn, which is the driest season. The annual rainfall of 54.7 inches in Kalama means that it is wetter than most places in Washington.

January is the rainiest month in Boulder Creek with 11.5 days of rain, and July is the driest month with only 0.9 rainy days. There are 75.0 rainy days annually in Boulder Creek, which is rainier than most places in California. The rainiest season is Spring when it rains 46% of the time and the driest is Autumn with only a 5% chance of a rainy day.

November is the rainiest month in Kalama with 21.0 days of rain, and August is the driest month with only 4.7 rainy days. There are 173.6 rainy days annually in Kalama, which is rainier than most places in Washington. The rainiest season is Spring when it rains 33% of the time and the driest is Autumn with only a 12% chance of a rainy day.

There is rarely any recorded snowfall in Boulder Creek, ranking it as one of the least snowy places in California.

An annual snowfall of 7.7 inches in Kalama means that it is snowier than most places in Washington.

Any measurable snowfall is a rare occurance in Boulder Creek.

January is the snowiest month in Kalama with 2.7 inches of snow, and 4 months of the year have significant snowfall.