Zip 85140 (San Tan Valley, AZ) Climate

The climate in 85140 San Tan Valley, AZ is a dry desert climate with hot summers and mild winters. During the summer months, temperatures can reach up to 100°F and higher with low humidity levels. Winters are generally mild with highs in the mid-60s and lows in the upper 30s. Precipitation is scarce throughout the year, with an average annual precipitation of only 8 inches. Due to its elevation of 1,953 feet, cold fronts from the north do not usually affect the area.

San Tan Valley (zip 85140), Arizona gets 10 inches of rain, on average, per year. The US average is 38 inches of rain per year.

San Tan Valley (zip 85140) averages 0 inches of snow per year. The US average is 28 inches of snow per year.

On average, there are 292 sunny days per year in San Tan Valley (zip 85140). The US average is 205 sunny days.

San Tan Valley (zip 85140) gets some kind of precipitation, on average, 32 days per year. Precipitation is rain, snow, sleet, or hail that falls to the ground. In order for precipitation to be counted you have to get at least .01 inches on the ground to measure.

Weather Highlights

Summer High: the July high is around 105 degrees
Winter Low: the January low is 39
Rain: averages 10 inches of rain a year
Snow: averages 0 inches of snow a year

Bestplaces Comfort Index

The annual BestPlaces Comfort Index for the 85140 zip code is 7.3 (10=best), which means it is less comfortable than most places in Arizona.

4.5 Summer - 8.5 Winter

April, March and November are the most pleasant months in the 85140 zip code, while July and August are the least comfortable months.

Climate	San Tan Valley, Arizona	United States
	10.1 in.	38.1 in.
	0.0 in.	27.8 in.
	32.4 days	106.2 days
	292 days	205 days
	105.2°	85.8°
	39.3°	21.7°
	7.3	7
	6.2	4.3
	1455 ft.	2443 ft.

Climate

YOU SHOULD KNOW

Many people confuse weather and climate but they are different. Weather is the conditions of the atmosphere over a short period of time, and climate is how the atmosphere is over long periods of time.

Weather is how the atmosphere is behaving and its effects upon life and human activities. Weather can change from minute-to-minute. Most people think of weather in terms of temperature, humidity, precipitation, cloudiness, brightness, visibility, wind, and atmospheric pressure.

Climate is the description of the long-term pattern of weather in a place. Climate can mean the average weather for a particular region and time period taken over 30 years. Climate is the average of weather over time.

July is the hottest month for the 85140 zip code with an average high temperature of 105.2°, which ranks it as warmer than most places in Arizona. In the 85140 zip code, there are 3 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for the 85140 zip code are March, November and April.

In the 85140 zip code, there are 166.1 days annually when the high temperature is over 90°, which is hotter than most places in Arizona.

December has the coldest nighttime temperatures for the 85140 zip code with an average of 38.0°. This is warmer than most places in Arizona.

In the 85140 zip code, there are 14.5 days annually when the nighttime low temperature falls below freezing, which is warmer than most places in Arizona.

In the 85140 zip code, there are 0.0 days annually when the nighttime low temperature falls below zero°, which is about average compared to other places in Arizona.

Humidity in the 85140 zip code is generally quite low and comfortable. There are few days during the summer when the humidity becomes unpleasant. The most humid months (but still comfortable) are August, July and September.

August is the wettest month in the 85140 zip code 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 10.1 inches in the 85140 zip code means that it is drier than most places in Arizona.

August is the rainiest month in the 85140 zip code with 4.7 days of rain, and June is the driest month with only 0.4 rainy days. There are 32.4 rainy days annually in the 85140 zip code, 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.

There is rarely any recorded snowfall in the 85140 zip code, ranking it as one of the least snowy places in Arizona. Any measurable snowfall is a rare occurance in the 85140 zip code.