2025 Compare Climate & Weather:
San Tan Valley, AZ vs Mesa, AZ

Highlights

On average, there are 301 sunny days per year in Mesa. San Tan Valley averages 292 sunny days per year. The US average is 205 sunny days.

Mesa, Arizona gets 10.1 inches of rain, on average, per year. San Tan Valley, Arizona gets 9.9 inches of rain, on average, per year. The US average is 38.1 inches of rain per year.

Mesa averages 0 inches of snow per year. San Tan Valley averages 0 inches of snow per year. The US average is 27.8 inches of snow per year.

Weather Highlights

Mesa, Arizona
Summer High: the July high is around 104.6 degrees
Winter Low: the January low is 40.9
Rain: averages 10.1 inches of rain a year
Snow: averages 0 inches of snow a year

San Tan Valley, Arizona
Summer High: the July high is around 105 degrees
Winter Low: the January low is 39.4
Rain: averages 9.9 inches of rain a year
Snow: averages 0 inches of snow a year

BestPlaces Comfort Index

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

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

Today's Weather - San Tan Valley, AZ

65°F

Today's Weather - Mesa, AZ

68°F

Average Monthly High / Low (°F)

Hot, Freezing, Rainy, Snowy Days: San Tan Valley / Mesa

July is the hottest month for San Tan Valley with an average high temperature of 105.0°, which ranks it as warmer than most places in Arizona. In San Tan Valley, there are 3 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for San Tan Valley are March, November and April.

July is the hottest month for Mesa with an average high temperature of 104.6°, which ranks it as warmer than most places in Arizona. In Mesa, there are 4 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for Mesa are March, November and April.

December has the coldest nighttime temperatures for San Tan Valley with an average of 38.3°. This is warmer than most places in Arizona.

December has the coldest nighttime temperatures for Mesa with an average of 39.6°. This is warmer than most places in Arizona.

In San Tan Valley, there are 165.5 days annually when the high temperature is over 90°, which is hotter than most places in Arizona.

In Mesa, there are 165.6 days annually when the high temperature is over 90°, which is hotter than most places in Arizona.

In San Tan Valley, there are 14.2 days annually when the nighttime low temperature falls below freezing, which is warmer than most places in Arizona.

In Mesa, there are 8.9 days annually when the nighttime low temperature falls below freezing, which is warmer than most places in Arizona.

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

August is the wettest month in San Tan Valley with 1.5 inches of rain, and the driest month is June with 0.0 inches. The wettest season is Spring with 35% of yearly precipitation and 18% occurs in Summer, which is the driest season. The annual rainfall of 9.9 inches in San Tan Valley means that it is drier than most places in Arizona.


August is the wettest month in Mesa with 1.4 inches of rain, and the driest month is June with 0.0 inches. The wettest season is Spring with 35% of yearly precipitation and 18% occurs in Summer, which is the driest season. The annual rainfall of 10.1 inches in Mesa means that it is drier than most places in Arizona.

August is the rainiest month in San Tan Valley with 4.6 days of rain, and June is the driest month with only 0.3 rainy days. There are 32.2 rainy days annually in San Tan Valley, 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 18% chance of a rainy day.

August is the rainiest month in Mesa with 4.8 days of rain, and June is the driest month with only 0.5 rainy days. There are 36.0 rainy days annually in Mesa, which is less rainy than most places in Arizona. The rainiest season is Spring when it rains 35% of the time and the driest is Summer with only a 18% chance of a rainy day.

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

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

Any measurable snowfall is a rare occurance in San Tan Valley.

Any measurable snowfall is a rare occurance in Mesa.