2025 Compare Climate & Weather:
Rocklin, CA vs Brentwood, CA

Highlights

On average, there are 260 sunny days per year in Brentwood. Rocklin averages 255 sunny days per year. The US average is 205 sunny days.

Brentwood, California gets 14.5 inches of rain, on average, per year. Rocklin, California gets 20.8 inches of rain, on average, per year. The US average is 38.1 inches of rain per year.

Brentwood averages 0 inches of snow per year. Rocklin averages 0 inches of snow per year. The US average is 27.8 inches of snow per year.

Weather Highlights

Brentwood, California
Summer High: the July high is around 90.8 degrees
Winter Low: the January low is 39.6
Rain: averages 14.5 inches of rain a year
Snow: averages 0 inches of snow a year

Rocklin, California
Summer High: the July high is around 94 degrees
Winter Low: the January low is 39
Rain: averages 20.8 inches of rain a year
Snow: averages 0 inches of snow a year

BestPlaces Comfort Index

The annual BestPlaces Comfort Index for Brentwood is 8.5 (10=best), which means it is more comfortable than most places in California.

The annual BestPlaces Comfort Index for Rocklin is 8.2 (10=best), which means it is about average compared to other places in California.

Today's Weather - Rocklin, CA

83°F

Today's Weather - Brentwood, CA

74°F

Average Monthly High / Low (°F)

Hot, Freezing, Rainy, Snowy Days: Rocklin / Brentwood

July is the hottest month for Rocklin with an average high temperature of 94.0°, which ranks it as warmer than most places in California. In Rocklin, there are 3 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for Rocklin are October, May and April.

July is the hottest month for Brentwood with an average high temperature of 90.8°, which ranks it as about average compared to other places in California. In Brentwood, there are 3 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for Brentwood are October, May and April.

December has the coldest nighttime temperatures for Rocklin with an average of 38.9°. This is warmer than most places in California.

January has the coldest nighttime temperatures for Brentwood with an average of 39.6°. This is warmer than most places in California.

In Rocklin, there are 77.8 days annually when the high temperature is over 90°, which is hotter than most places in California.

In Brentwood, there are 56.7 days annually when the high temperature is over 90°, which is about average compared to other places in California.

In Rocklin, there are 10.5 days annually when the nighttime low temperature falls below freezing, which is warmer than most places in California.

In Brentwood, there are 7.9 days annually when the nighttime low temperature falls below freezing, which is warmer than most places in California.

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

January is the wettest month in Rocklin with 4.0 inches of rain, and the driest month is July with 0.0 inches. The wettest season is Spring with 54% of yearly precipitation and 1% occurs in Autumn, which is the driest season. The annual rainfall of 20.8 inches in Rocklin means that it is about average compared to other places in California.


January is the wettest month in Brentwood with 2.9 inches of rain, and the driest month is July with 0.0 inches. The wettest season is Spring with 57% of yearly precipitation and 1% occurs in Autumn, which is the driest season. The annual rainfall of 14.5 inches in Brentwood means that it is drier than most places in California.

January is the rainiest month in Rocklin with 10.6 days of rain, and July is the driest month with only 0.1 rainy days. There are 60.0 rainy days annually in Rocklin, which is about average compared to other 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.

January is the rainiest month in Brentwood with 11.1 days of rain, and July is the driest month with only 0.0 rainy days. There are 56.7 rainy days annually in Brentwood, which is about average compared to other places in California. The rainiest season is Spring when it rains 54% of the time and the driest is Autumn with only a 2% chance of a rainy day.

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

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

Any measurable snowfall is a rare occurance in Rocklin.

Any measurable snowfall is a rare occurance in Brentwood.