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

Highlights

On average, there are 292 sunny days per year in San Tan Valley. Harlingen averages 229 sunny days per year. The US average is 205 sunny days.

San Tan Valley, Arizona gets 9.9 inches of rain, on average, per year. Harlingen, Texas gets 25.9 inches of rain, on average, per year. The US average is 38.1 inches of rain per year.

San Tan Valley averages 0 inches of snow per year. Harlingen averages 0.1 inches of snow per year. The US average is 27.8 inches of snow per year.

Weather Highlights

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

Harlingen, Texas
Summer High: the July high is around 95.1 degrees
Winter Low: the January low is 49.4
Rain: averages 25.9 inches of rain a year
Snow: averages 0.1 inches of snow a year

BestPlaces Comfort Index

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.

The annual BestPlaces Comfort Index for Harlingen is 6.3 (10=best), which means it is one of the least comfortable places in Texas.

Today's Weather - Harlingen, TX

82°F

Today's Weather - San Tan Valley, AZ

72°F

Average Monthly High / Low (°F)

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

August is the hottest month for Harlingen with an average high temperature of 96.0°, which ranks it as warmer than most places in Texas. In Harlingen, there are 5 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for Harlingen are November, March and February.

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.

January has the coldest nighttime temperatures for Harlingen with an average of 49.4°. This is one of the warmest places in Texas.

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

In Harlingen, there are 142.4 days annually when the high temperature is over 90°, which is hotter than most places in Texas.

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 Harlingen, there are 1.7 days annually when the nighttime low temperature falls below freezing, which is one of the warmest places in Texas.

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

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.

September is the wettest month in Harlingen with 5.2 inches of rain, and the driest month is January with 1.1 inches. The wettest season is Winter with 36% of yearly precipitation and 15% occurs in Spring, which is the driest season. The annual rainfall of 25.9 inches in Harlingen means that it is drier than most places in Texas.


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.

September is the rainiest month in Harlingen with 9.5 days of rain, and April is the driest month with only 4.2 rainy days. There are 70.7 rainy days annually in Harlingen, which is about average compared to other places in Texas. The rainiest season is Winter when it rains 29% of the time and the driest is Summer with only a 19% chance of a rainy day.

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.

An annual snowfall of 0.1 inches in Harlingen means that it is less snowy than most places in Texas.

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

December is the snowiest month in Harlingen with 0.1 inches of snow, and no months of the year have significant snowfall.

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