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

2025 Compare Climate & Weather:
Grass Valley, CA vs Oroville, CA

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Highlights

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

Oroville, California gets 34.3 inches of rain, on average, per year. Grass Valley, California gets 55 inches of rain, on average, per year. The US average is 38.1 inches of rain per year.

Oroville averages 0.1 inches of snow per year. Grass Valley averages 11.3 inches of snow per year. The US average is 27.8 inches of snow per year.

Weather Highlights

Oroville, California
Summer High: the July high is around 94.9 degrees
Winter Low: the January low is 37.5
Rain: averages 34.3 inches of rain a year
Snow: averages 0.1 inches of snow a year

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

BestPlaces Comfort Index
Oroville

The annual BestPlaces Comfort Index for Oroville is 8.1 (10=best), which means it is about average compared to other places in California.

8.1 / 10
May, October and April are the most pleasant months in Oroville, while January and December are the least comfortable months.

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.

Average Monthly High / Low (°F)
MonthGrass Valley, CAOroville, CA
January52° / 34°55° / 38°
February54° / 35°61° / 41°
March57° / 38°66° / 44°
April62° / 41°72° / 47°
May71° / 47°81° / 53°
June79° / 54°89° / 59°
July87° / 59°95° / 62°
August87° / 58°94° / 60°
September81° / 53°88° / 56°
October71° / 46°78° / 49°
November57° / 38°64° / 43°
December50° / 34°55° / 38°
Hot, Freezing, Rainy, Snowy Days: Grass Valley / Oroville
MonthHot DaysFreezing DaysRainy DaysSnowy Days
January0 / 012 / 713 / 121 / 0
February0 / 08 / 212 / 101 / 0
March0 / 05 / 112 / 101 / 0
April0 / 12 / 09 / 61 / 0
May1 / 60 / 06 / 40 / 0
June3 / 140 / 03 / 20 / 0
July11 / 250 / 00 / 00 / 0
August9 / 230 / 01 / 10 / 0
September4 / 130 / 02 / 20 / 0
October1 / 30 / 05 / 40 / 0
November0 / 05 / 210 / 80 / 0
December0 / 012 / 612 / 111 / 0
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.

July is the hottest month for Oroville with an average high temperature of 94.9°, which ranks it as warmer than most places in California. In Oroville, there are 3 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for Oroville are October, May and April.
December has the coldest nighttime temperatures for Grass Valley with an average of 34.0°. This is colder than most places in California.

January has the coldest nighttime temperatures for Oroville with an average of 37.5°. This is about average compared to other 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 Oroville, there are 84.1 days annually when the high temperature is over 90°, which is hotter 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 Oroville, there are 17.2 days annually when the nighttime low temperature falls below freezing, 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.

In Oroville, 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 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 wettest month in Oroville with 6.4 inches of rain, and the driest month is July with 0.0 inches. The wettest season is Spring with 52% of yearly precipitation and 2% occurs in Autumn, which is the driest season. The annual rainfall of 34.3 inches in Oroville means that it is wetter than most places in California.

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.

January is the rainiest month in Oroville with 11.7 days of rain, and July is the driest month with only 0.1 rainy days. There are 68.9 rainy days annually in Oroville, which is rainier 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 3% chance of a rainy day.

An annual snowfall of 11.3 inches in Grass Valley means that it is snowier than most places in California.

An annual snowfall of 0.1 inches in Oroville means that it is snowier than most places in California.
February is the snowiest month in Grass Valley with 3.7 inches of snow, and 6 months of the year have significant snowfall.

December is the snowiest month in Oroville with 0.1 inches of snow, and no 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 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

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Reviews for Oroville    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 Oroville

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Zips In Grass Valley, California
95945
Zips In OROVILLE, CALIFORNIA
95965
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