2025 Compare Climate & Weather:
Portland, OR vs La Mesa, CA

Highlights

On average, there are 261 sunny days per year in La Mesa. Portland averages 144 sunny days per year. The US average is 205 sunny days.

La Mesa, California gets 12.1 inches of rain, on average, per year. Portland, Oregon gets 42.8 inches of rain, on average, per year. The US average is 38.1 inches of rain per year.

La Mesa averages 0 inches of snow per year. Portland averages 2.6 inches of snow per year. The US average is 27.8 inches of snow per year.

Weather Highlights

La Mesa, California
Summer High: the July high is around 83.9 degrees
Winter Low: the January low is 44.6
Rain: averages 12.1 inches of rain a year
Snow: averages 0 inches of snow a year

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

BestPlaces Comfort Index

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

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

Today's Weather - Portland, OR

53°F

Today's Weather - La Mesa, CA

62°F

Average Monthly High / Low (°F)

Hot, Freezing, Rainy, Snowy Days: Portland / La Mesa

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.

August is the hottest month for La Mesa with an average high temperature of 85.6°, which ranks it as cooler than most places in California. In La Mesa, there are 7 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for La Mesa are June, October and May.

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

December has the coldest nighttime temperatures for La Mesa with an average of 43.8°. This is warmer than most 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 La Mesa, there are 28.7 days annually when the high temperature is over 90°, which is cooler 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 La Mesa, there are 1.1 days annually when the nighttime low temperature falls below freezing, which is warmer than most 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.

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


February is the wettest month in La Mesa with 2.5 inches of rain, and the driest month is August with 0.0 inches. The wettest season is Spring with 53% of yearly precipitation and 2% occurs in Autumn, which is the driest season. The annual rainfall of 12.1 inches in La Mesa means that it is drier than most places in California.

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.

February is the rainiest month in La Mesa with 6.3 days of rain, and August is the driest month with only 0.4 rainy days. There are 36.9 rainy days annually in La Mesa, which is less rainy than most places in California. The rainiest season is Spring when it rains 47% of the time and the driest is Autumn with only a 5% chance of a rainy day.

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

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

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

Any measurable snowfall is a rare occurance in La Mesa.