The remote server returned an error: (400) Bad Request.The remote server returned an error: (400) Bad Request. 2025 Compare Climate & Weather: San Mateo, CA vs Grass Valley, CA

2025 Compare Climate & Weather:
San Mateo, CA vs Grass Valley, CA

Change Cities
Highlights

On average, there are 243 sunny days per year in Grass Valley. San Mateo averages 265 sunny days per year. The US average is 205 sunny days.

Grass Valley, California gets 55 inches of rain, on average, per year. San Mateo, California gets 24.4 inches of rain, on average, per year. The US average is 38.1 inches of rain per year.

Grass Valley averages 11.3 inches of snow per year. San Mateo averages 0 inches of snow per year. The US average is 27.8 inches of snow per year.

Weather Highlights

Grass Valley, California
Summer High: the July high is around 87.2 degrees
Winter Low: the January low is 34.2
Rain: averages 55 inches of rain a year
Snow: averages 11.3 inches of snow a year

San Mateo, California
Summer High: the July high is around 74.1 degrees
Winter Low: the January low is 42.2
Rain: averages 24.4 inches of rain a year
Snow: averages 0 inches of snow a year

BestPlaces Comfort Index
Grass Valley

The annual BestPlaces Comfort Index for Grass Valley is 7.9 (10=best), which means it is less comfortable than most places in California.

7.9 / 10
June, September and August are the most pleasant months in Grass Valley, while December and January are the least comfortable months.

San Mateo

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

8.5 / 10
August, July and September are the most pleasant months in San Mateo, while January and December are the least comfortable months.

Average Monthly High / Low (°F)
MonthSan Mateo, CAGrass Valley, CA
January58° / 42°52° / 34°
February61° / 44°54° / 35°
March63° / 45°57° / 38°
April65° / 47°62° / 41°
May68° / 50°71° / 47°
June72° / 52°79° / 54°
July74° / 54°87° / 59°
August75° / 55°87° / 58°
September74° / 53°81° / 53°
October71° / 50°71° / 46°
November64° / 46°57° / 38°
December58° / 42°50° / 34°
Hot, Freezing, Rainy, Snowy Days: San Mateo / Grass Valley
MonthHot DaysFreezing DaysRainy DaysSnowy Days
January0 / 02 / 1212 / 130 / 1
February0 / 01 / 811 / 120 / 1
March0 / 00 / 511 / 120 / 1
April0 / 00 / 27 / 90 / 1
May1 / 10 / 04 / 60 / 0
June2 / 30 / 02 / 30 / 0
July2 / 110 / 02 / 00 / 0
August2 / 90 / 02 / 10 / 0
September2 / 40 / 03 / 20 / 0
October1 / 10 / 05 / 50 / 0
November0 / 00 / 59 / 100 / 0
December0 / 02 / 1211 / 120 / 1
August is the hottest month for San Mateo with an average high temperature of 74.5°, which ranks it as one of the coolest places in California. In San Mateo, there are 5 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for San Mateo are August, September and July.

July is the hottest month for Grass Valley with an average high temperature of 87.2°, which ranks it as about average compared to other places in California. In Grass Valley, there are 4 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for Grass Valley are June, September and May.
January has the coldest nighttime temperatures for San Mateo with an average of 42.2°. This is warmer than most places in California.

December has the coldest nighttime temperatures for Grass Valley with an average of 34.0°. This is colder than most places in California.

In San Mateo, there are 9.4 days annually when the high temperature is over 90°, which is cooler than most places in California.

In Grass Valley, there are 28.3 days annually when the high temperature is over 90°, which is cooler than most places in California.

In San Mateo, there are 4.6 days annually when the nighttime low temperature falls below freezing, which is warmer than most places in California.

In Grass Valley, there are 45.7 days annually when the nighttime low temperature falls below freezing, which is colder than most places in California.

In San Mateo, 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 Grass Valley, 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 San Mateo with 4.8 inches of rain, and the driest month is July with 0.1 inches. The wettest season is Spring with 57% of yearly precipitation and 2% occurs in Autumn, which is the driest season. The annual rainfall of 24.4 inches in San Mateo means that it is wetter than most places in California.


December is the wettest month in Grass Valley with 10.4 inches of rain, and the driest month is July 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 55.0 inches in Grass Valley means that it is one of the wettest places in California.

January is the rainiest month in San Mateo with 11.6 days of rain, and July is the driest month with only 1.7 rainy days. There are 76.9 rainy days annually in San Mateo, which is rainier than most places in California. The rainiest season is Spring when it rains 44% of the time and the driest is Autumn with only a 7% chance of a rainy day.

January is the rainiest month in Grass Valley with 12.7 days of rain, and July is the driest month with only 0.3 rainy days. There are 83.8 rainy days annually in Grass Valley, which is one of the rainiest places in California. The rainiest season is Spring when it rains 44% of the time and the driest is Autumn with only a 4% chance of a rainy day.

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

An annual snowfall of 11.3 inches in Grass Valley means that it is snowier than most places in California.
Any measurable snowfall is a rare occurance in San Mateo.

February is the snowiest month in Grass Valley with 3.7 inches of snow, and 6 months of the year have significant snowfall.

DID YOU KNOW?

Many people confuse Weather and Climate, but they are different. Weather refers to the conditions of the atmosphere over a short period of time, while Climate refers to the conditions of the atmosphere over a long period of time.

Weather, more specifically, refers to how the atmosphere behaves and its effects on life and human activities. Most people think of Weather in terms of what can be observed: temperature, humidity, precipitation, and cloudy/sunny conditions. Weather conditions constantly change on a minute-to-minute basis.

Climate is a record of the average weather conditions for a given place over a long period of time, often referred to as Climate Normals. A 30-year period of record is a common requirement to be considered a Climate Normal.

Reviews for San Mateo    2 Reviews
Jill · Sherman Oaks, CA
re:
Over 16 years ago

Hi. I'd like to know if you still feel the same way about living in Broomfield. I went there this past July to check it out (along with Lafayette, Boulder (can't  More

   |    Reply
NC For Me · Apex, NC
re:
Over 16 years ago

Apex is perfect for what you are looking for. It's close enough to Raleigh, Durham, Chapel Hill to find a job and Cary the next town over, is a little more expensive but  More

   |    Reply

Start Your Review of San Mateo

See all reviews
Reviews for Grass Valley    2 Reviews
Jill · Sherman Oaks, CA
re:
Over 16 years ago

Hi. I'd like to know if you still feel the same way about living in Broomfield. I went there this past July to check it out (along with Lafayette, Boulder (can't  More

   |    Reply
NC For Me · Apex, NC
re:
Over 16 years ago

Apex is perfect for what you are looking for. It's close enough to Raleigh, Durham, Chapel Hill to find a job and Cary the next town over, is a little more expensive but  More

   |    Reply

Start Your Review of Grass Valley

See all reviews
Most Recent Searches On Compare Climate & Weather
Compare CityCompared To This City
 Wichita, KansasFallbrook, CaliforniaCompare
 Detroit, MichiganPortland, OregonCompare
 Colorado Springs, ColoradoKingsport, TennesseeCompare
 Seattle, WashingtonIndianapolis, IndianaCompare
 Oneonta, New YorkClifton Park, New YorkCompare
 Seattle, WashingtonSan Diego, CaliforniaCompare
 Seattle, WashingtonVancouver, WashingtonCompare
 Carmel, IndianaSeattle, WashingtonCompare
 Chicago, IllinoisWashington, District of ColumbiaCompare
 Anacortes, WashingtonMount Vernon, WashingtonCompare
Compare Cost of Living
Compare San Mateo Cost of Living vs Grass Valley Cost of Living: Taxes, Childcare, Groceries, Health...


Zips In San Mateo, California
94403, 94401, 94402
Zips In GRASS VALLEY, CALIFORNIA
95945
Learn More About SAN MATEO, CALIFORNIA
Overview
Cost of Living
Job Market
Crime
Climate
Economy
Religion
Voting
Learn More About Grass Valley, California
Overview
Cost of Living
Job Market
Crime
Climate
Economy
Religion
Voting
Premium Subscription
Includes Cost of Living compares for child care, utilities, transportation, health, taxes, housing for home owners vs renters, weather, insurance premiums and so much more.


The premier source for comprehensive city data for over 30 years.

Privacy Policy  •  Terms of Use  •  Returns & Refunds
© Best Places. All rights reserved.