2025 Compare Climate & Weather:
Eureka, CA vs Portland, OR

Highlights

On average, there are 144 sunny days per year in Portland. Eureka averages 179 sunny days per year. The US average is 205 sunny days.

Portland, Oregon gets 42.8 inches of rain, on average, per year. Eureka, California gets 45.7 inches of rain, on average, per year. The US average is 38.1 inches of rain per year.

Portland averages 2.6 inches of snow per year. Eureka averages 0.5 inches of snow per year. The US average is 27.8 inches of snow per year.

Weather Highlights

Portland, Oregon
Summer High: the July high is around 80.5 degrees
Winter Low: the January low is 36.4
Rain: averages 42.8 inches of rain a year
Snow: averages 2.6 inches of snow a year

Eureka, California
Summer High: the July high is around 65 degrees
Winter Low: the January low is 41.1
Rain: averages 45.7 inches of rain a year
Snow: averages 0.5 inches of snow a year

BestPlaces Comfort Index

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

The annual BestPlaces Comfort Index for Eureka is 7.6 (10=best), which means it is less comfortable than most places in California.

Today's Weather - Eureka, CA

55°F

Today's Weather - Portland, OR

55°F

Average Monthly High / Low (°F)

Hot, Freezing, Rainy, Snowy Days: Eureka / Portland

August is the hottest month for Eureka with an average high temperature of 66.1°, which ranks it as one of the coolest places in California. In Eureka, there are 0 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for Eureka are August, September and July.

August is the hottest month for Portland with an average high temperature of 81.1°, which ranks it as cooler than most places in Oregon. In Portland, there are 4 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for Portland are September, July and August.

December has the coldest nighttime temperatures for Eureka with an average of 40.5°. This is warmer than most places in California.

December has the coldest nighttime temperatures for Portland with an average of 35.6°. This is warmer than most places in Oregon.

In Eureka, there are 0.2 days annually when the high temperature is over 90°, which is one of the coolest places in California.

In Portland, there are 11.6 days annually when the high temperature is over 90°, which is cooler than most places in Oregon.

In Eureka, there are 9.3 days annually when the nighttime low temperature falls below freezing, which is warmer than most places in California.

In Portland, there are 29.2 days annually when the nighttime low temperature falls below freezing, which is warmer than most places in Oregon.

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

December is the wettest month in Eureka with 8.8 inches of rain, and the driest month is July with 0.2 inches. The wettest season is Spring with 50% of yearly precipitation and 3% occurs in Autumn, which is the driest season. The annual rainfall of 45.7 inches in Eureka means that it is one of the wettest places in California.


December is the wettest month in Portland with 6.8 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 42.8 inches in Portland means that it is about average compared to other places in Oregon.

December is the rainiest month in Eureka with 17.0 days of rain, and July is the driest month with only 2.4 rainy days. There are 123.9 rainy days annually in Eureka, which is one of the rainiest places in California. The rainiest season is Spring when it rains 39% of the time and the driest is Autumn with only a 8% chance of a rainy day.

November is the rainiest month in Portland with 19.3 days of rain, and August is the driest month with only 3.7 rainy days. There are 155.9 rainy days annually in Portland, which is rainier than most places in Oregon. The rainiest season is Spring when it rains 34% of the time and the driest is Autumn with only a 11% chance of a rainy day.

An annual snowfall of 0.5 inches in Eureka means that it is snowier than most places in California.

An annual snowfall of 2.6 inches in Portland means that it is less snowy than most places in Oregon.

February is the snowiest month in Eureka with 0.3 inches of snow, and no months of the year have significant snowfall.

December is the snowiest month in Portland with 0.9 inches of snow, and 3 months of the year have significant snowfall.