2025 Compare Climate & Weather:
Walnut, CA vs Rancho Cucamonga, CA

Highlights

On average, there are 287 sunny days per year in Rancho Cucamonga. Walnut averages 285 sunny days per year. The US average is 205 sunny days.

Rancho Cucamonga, California gets 19.1 inches of rain, on average, per year. Walnut, California gets 16.2 inches of rain, on average, per year. The US average is 38.1 inches of rain per year.

Rancho Cucamonga averages 0 inches of snow per year. Walnut averages 0 inches of snow per year. The US average is 27.8 inches of snow per year.

Weather Highlights

Rancho Cucamonga, California
Summer High: the July high is around 92.9 degrees
Winter Low: the January low is 42.7
Rain: averages 19.1 inches of rain a year
Snow: averages 0 inches of snow a year

Walnut, California
Summer High: the July high is around 88.2 degrees
Winter Low: the January low is 44
Rain: averages 16.2 inches of rain a year
Snow: averages 0 inches of snow a year

BestPlaces Comfort Index

The annual BestPlaces Comfort Index for Rancho Cucamonga is 8.7 (10=best), which means it is more comfortable than most places in California.

The annual BestPlaces Comfort Index for Walnut is 9.1 (10=best), which means it is one of the most pleasant places in California.

Today's Weather - Walnut, CA

75°F

Today's Weather - Rancho Cucamonga, CA

81°F

Average Monthly High / Low (°F)

Hot, Freezing, Rainy, Snowy Days: Walnut / Rancho Cucamonga

August is the hottest month for Walnut with an average high temperature of 90.3°, which ranks it as about average compared to other places in California. In Walnut, there are 6 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for Walnut are May, April and October.

August is the hottest month for Rancho Cucamonga with an average high temperature of 94.2°, which ranks it as warmer than most places in California. In Rancho Cucamonga, there are 5 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for Rancho Cucamonga are May, April and October.

December has the coldest nighttime temperatures for Walnut with an average of 43.0°. This is warmer than most places in California.

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

In Walnut, there are 54.9 days annually when the high temperature is over 90°, which is about average compared to other places in California.

In Rancho Cucamonga, there are 86.4 days annually when the high temperature is over 90°, which is hotter than most places in California.

In Walnut, there are 3.8 days annually when the nighttime low temperature falls below freezing, which is warmer than most places in California.

In Rancho Cucamonga, there are 2.5 days annually when the nighttime low temperature falls below freezing, which is warmer than most places in California.

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

February is the wettest month in Walnut with 3.9 inches of rain, and the driest month is July 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 16.2 inches in Walnut means that it is about average compared to other places in California.


February is the wettest month in Rancho Cucamonga with 4.6 inches of rain, and the driest month is July with 0.0 inches. The wettest season is Spring with 59% of yearly precipitation and 2% occurs in Autumn, which is the driest season. The annual rainfall of 19.1 inches in Rancho Cucamonga means that it is about average compared to other places in California.

February is the rainiest month in Walnut with 6.0 days of rain, and July is the driest month with only 0.3 rainy days. There are 32.8 rainy days annually in Walnut, which is less rainy than most places in California. The rainiest season is Spring when it rains 50% of the time and the driest is Autumn with only a 3% chance of a rainy day.

February is the rainiest month in Rancho Cucamonga with 6.4 days of rain, and July is the driest month with only 0.4 rainy days. There are 35.9 rainy days annually in Rancho Cucamonga, 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 4% chance of a rainy day.

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

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

Any measurable snowfall is a rare occurance in Walnut.

Any measurable snowfall is a rare occurance in Rancho Cucamonga.