2025 Compare Climate & Weather:
Phoenix, AZ vs Grass Valley, NV

Highlights

On average, there are 228 sunny days per year in Grass Valley. Phoenix averages 299 sunny days per year. The US average is 205 sunny days.

Grass Valley, Nevada gets 8.2 inches of rain, on average, per year. Phoenix, Arizona gets 9.2 inches of rain, on average, per year. The US average is 38.1 inches of rain per year.

Grass Valley averages 15.5 inches of snow per year. Phoenix averages 0 inches of snow per year. The US average is 27.8 inches of snow per year.

Weather Highlights

Grass Valley, Nevada
Summer High: the July high is around 93.1 degrees
Winter Low: the January low is 17.8
Rain: averages 8.2 inches of rain a year
Snow: averages 15.5 inches of snow a year

Phoenix, Arizona
Summer High: the July high is around 104.5 degrees
Winter Low: the January low is 43.2
Rain: averages 9.2 inches of rain a year
Snow: averages 0 inches of snow a year

BestPlaces Comfort Index

The annual BestPlaces Comfort Index for Grass Valley is 7.1 (10=best), which means it is less comfortable than most places in Nevada.

The annual BestPlaces Comfort Index for Phoenix is 7.3 (10=best), which means it is less comfortable than most places in Arizona.

Today's Weather - Phoenix, AZ

90°F

Today's Weather - Grass Valley, NV

58°F

Average Monthly High / Low (°F)

Hot, Freezing, Rainy, Snowy Days: Phoenix / Grass Valley

July is the hottest month for Phoenix with an average high temperature of 104.5°, which ranks it as warmer than most places in Arizona. In Phoenix, there are 4 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for Phoenix are March, November and April.

July is the hottest month for Grass Valley with an average high temperature of 93.1°, which ranks it as about average compared to other places in Nevada. In Grass Valley, there are 3 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for Grass Valley are September, June and May.

December has the coldest nighttime temperatures for Phoenix with an average of 42.2°. This is one of the warmest places in Arizona.

December has the coldest nighttime temperatures for Grass Valley with an average of 16.9°. This is colder than most places in Nevada.

In Phoenix, there are 163.2 days annually when the high temperature is over 90°, which is hotter than most places in Arizona.

In Grass Valley, there are 57.1 days annually when the high temperature is over 90°, which is about average compared to other places in Nevada.

In Phoenix, there are 3.2 days annually when the nighttime low temperature falls below freezing, which is warmer than most places in Arizona.

In Grass Valley, there are 182.2 days annually when the nighttime low temperature falls below freezing, which is colder than most places in Nevada.

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

In Grass Valley, there are 4.0 days annually when the nighttime low temperature falls below zero°, which is colder than most places in Nevada.

August is the wettest month in Phoenix with 1.1 inches of rain, and the driest month is June with 0.0 inches. The wettest season is Spring with 35% of yearly precipitation and 16% occurs in Summer, which is the driest season. The annual rainfall of 9.2 inches in Phoenix means that it is drier than most places in Arizona.


May is the wettest month in Grass Valley with 1.1 inches of rain, and the driest month is July with 0.2 inches. The wettest season is Summer with 33% of yearly precipitation and 12% occurs in Autumn, which is the driest season. The annual rainfall of 8.2 inches in Grass Valley means that it is about average compared to other places in Nevada.

August is the rainiest month in Phoenix with 4.0 days of rain, and June is the driest month with only 0.4 rainy days. There are 33.1 rainy days annually in Phoenix, which is less rainy than most places in Arizona. The rainiest season is Spring when it rains 34% of the time and the driest is Summer with only a 20% chance of a rainy day.

March is the rainiest month in Grass Valley with 7.5 days of rain, and August is the driest month with only 1.9 rainy days. There are 62.2 rainy days annually in Grass Valley, which is rainier than most places in Nevada. The rainiest season is Summer when it rains 33% of the time and the driest is Autumn with only a 13% chance of a rainy day.

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

An annual snowfall of 15.5 inches in Grass Valley means that it is about average compared to other places in Nevada.

Any measurable snowfall is a rare occurance in Phoenix.

December is the snowiest month in Grass Valley with 3.9 inches of snow, and 6 months of the year have significant snowfall.