2025 Compare Climate & Weather:
Renton, WA vs Upland, CA

Highlights

On average, there are 289 sunny days per year in Upland. Renton averages 151 sunny days per year. The US average is 205 sunny days.

Upland, California gets 21 inches of rain, on average, per year. Renton, Washington gets 43.6 inches of rain, on average, per year. The US average is 38.1 inches of rain per year.

Upland averages 0 inches of snow per year. Renton averages 5.6 inches of snow per year. The US average is 27.8 inches of snow per year.

Weather Highlights

Upland, California
Summer High: the July high is around 92.2 degrees
Winter Low: the January low is 42.7
Rain: averages 21 inches of rain a year
Snow: averages 0 inches of snow a year

Renton, Washington
Summer High: the July high is around 76 degrees
Winter Low: the January low is 36.2
Rain: averages 43.6 inches of rain a year
Snow: averages 5.6 inches of snow a year

BestPlaces Comfort Index

The annual BestPlaces Comfort Index for Upland is 8.8 (10=best), which means it is more comfortable than most places in California.

The annual BestPlaces Comfort Index for Renton is 7.3 (10=best), which means it is more comfortable than most places in Washington.

Today's Weather - Renton, WA

66°F

Today's Weather - Upland, CA

64°F

Average Monthly High / Low (°F)

Hot, Freezing, Rainy, Snowy Days: Renton / Upland

August is the hottest month for Renton with an average high temperature of 76.5°, which ranks it as about average compared to other places in Washington. In Renton, there are 4 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for Renton are August, July and September.

August is the hottest month for Upland with an average high temperature of 93.5°, which ranks it as warmer than most places in California. In Upland, there are 5 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for Upland are May, April and October.

December has the coldest nighttime temperatures for Renton with an average of 34.8°. This is warmer than most places in Washington.

December has the coldest nighttime temperatures for Upland with an average of 41.8°. This is warmer than most places in California.

In Renton, there are 2.7 days annually when the high temperature is over 90°, which is cooler than most places in Washington.

In Upland, there are 81.0 days annually when the high temperature is over 90°, which is hotter than most places in California.

In Renton, there are 32.9 days annually when the nighttime low temperature falls below freezing, which is warmer than most places in Washington.

In Upland, there are 2.4 days annually when the nighttime low temperature falls below freezing, which is warmer than most places in California.

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

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

November is the wettest month in Renton with 7.2 inches of rain, and the driest month is July with 0.9 inches. The wettest season is Spring with 38% of yearly precipitation and 9% occurs in Autumn, which is the driest season. The annual rainfall of 43.6 inches in Renton means that it is about average compared to other places in Washington.


February is the wettest month in Upland with 5.1 inches of rain, and the driest month is July with 0.0 inches. The wettest season is Spring with 60% of yearly precipitation and 1% occurs in Autumn, which is the driest season. The annual rainfall of 21.0 inches in Upland means that it is about average compared to other places in California.

November is the rainiest month in Renton with 19.3 days of rain, and August is the driest month with only 5.1 rainy days. There are 160.8 rainy days annually in Renton, which is about average compared to other places in Washington. The rainiest season is Spring when it rains 33% of the time and the driest is Autumn with only a 13% chance of a rainy day.

February is the rainiest month in Upland with 5.9 days of rain, and July is the driest month with only 0.1 rainy days. There are 32.5 rainy days annually in Upland, which is less rainy than most places in California. The rainiest season is Spring when it rains 49% of the time and the driest is Autumn with only a 3% chance of a rainy day.

An annual snowfall of 5.6 inches in Renton means that it is about average compared to other places in Washington.

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

December is the snowiest month in Renton with 1.9 inches of snow, and 4 months of the year have significant snowfall.

Any measurable snowfall is a rare occurance in Upland.