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 Mount Vernon, WA

2025 Compare Climate & Weather:
Grass Valley, CA vs Mount Vernon, WA

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Highlights

On average, there are 156 sunny days per year in Mount Vernon. Grass Valley averages 243 sunny days per year. The US average is 205 sunny days.

Mount Vernon, Washington gets 38.1 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.

Mount Vernon averages 5 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

Mount Vernon, Washington
Summer High: the July high is around 72.8 degrees
Winter Low: the January low is 35.7
Rain: averages 38.1 inches of rain a year
Snow: averages 5 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
Mount Vernon

The annual BestPlaces Comfort Index for Mount Vernon is 7.2 (10=best), which means it is more comfortable than most places in Washington.

7.2 / 10
August, July and September are the most pleasant months in Mount Vernon, while December and January 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, CAMount Vernon, WA
January52° / 34°47° / 36°
February54° / 35°50° / 36°
March57° / 38°54° / 39°
April62° / 41°58° / 42°
May71° / 47°64° / 47°
June79° / 54°68° / 51°
July87° / 59°73° / 53°
August87° / 58°74° / 53°
September81° / 53°69° / 49°
October71° / 46°60° / 43°
November57° / 38°51° / 39°
December50° / 34°46° / 35°
Hot, Freezing, Rainy, Snowy Days: Grass Valley / Mount Vernon
MonthHot DaysFreezing DaysRainy DaysSnowy Days
January0 / 012 / 913 / 191 / 1
February0 / 08 / 912 / 151 / 1
March0 / 05 / 412 / 181 / 0
April0 / 02 / 19 / 151 / 0
May1 / 00 / 06 / 130 / 0
June3 / 00 / 03 / 110 / 0
July11 / 00 / 00 / 60 / 0
August9 / 00 / 01 / 60 / 0
September4 / 00 / 02 / 90 / 0
October1 / 00 / 15 / 150 / 0
November0 / 05 / 510 / 200 / 0
December0 / 012 / 1112 / 181 / 1
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.

August is the hottest month for Mount Vernon with an average high temperature of 73.8°, which ranks it as cooler than most places in Washington. In Mount Vernon, there are 2 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for Mount Vernon are August, July and September.
December has the coldest nighttime temperatures for Grass Valley with an average of 34.0°. This is colder than most places in California.

December has the coldest nighttime temperatures for Mount Vernon with an average of 34.6°. This is warmer than most places in Washington.

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 Mount Vernon, there are 0.2 days annually when the high temperature is over 90°, which is one of the coolest places in Washington.

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 Mount Vernon, there are 38.9 days annually when the nighttime low temperature falls below freezing, which is warmer than most places in Washington.

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

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.


November is the wettest month in Mount Vernon with 6.0 inches of rain, and the driest month is July with 1.3 inches. The wettest season is Spring with 31% of yearly precipitation and 13% occurs in Autumn, which is the driest season. The annual rainfall of 38.1 inches in Mount Vernon means that it is about average compared to other places in Washington.

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.

November is the rainiest month in Mount Vernon with 20.0 days of rain, and August is the driest month with only 5.6 rainy days. There are 165.0 rainy days annually in Mount Vernon, which is rainier than most places in Washington. The rainiest season is Spring when it rains 32% of the time and the driest is Autumn with only a 14% 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 5.0 inches in Mount Vernon means that it is about average compared to other places in Washington.
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 Mount Vernon with 2.0 inches of snow, and 4 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 Mount Vernon    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 Mount Vernon

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Zips In Grass Valley, California
95945
Zips In MOUNT VERNON, WASHINGTON
98273, 98274
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