Pima, AZ Climate


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United States / Arizona / Safford Metro Area / Graham County / Pima / Zip Codes
Pima, AZ has a semi-arid climate that is characterized by warm to hot temperatures year round. Summers are typically dry and hot, with temperatures regularly reaching 100°F and even higher during heat waves. Winters are generally mild, but nighttime temperatures can still drop below freezing. Rainfall is scant, with an average of only 10 inches per year. This makes wildfire season a perpetual threat for the area, especially during unusually dry years.

Pima, Arizona gets 10 inches of rain, on average, per year. The US average is 38 inches of rain per year.

Pima averages 1 inches of snow per year. The US average is 28 inches of snow per year.

On average, there are 280 sunny days per year in Pima. The US average is 205 sunny days.

Pima gets some kind of precipitation, on average, 47 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 99 degrees
Winter Low: the January low is 30
Rain: averages 10 inches of rain a year
Snow: averages 1 inches of snow a year

Bestplaces Comfort Index

The annual BestPlaces Comfort Index for Pima is 7.7 (10=best), which means it is more comfortable than most places in Arizona.

6.2 Summer - 7.7 Winter
October, April and March are the most pleasant months in Pima, while July and August are the least comfortable months.

  ClimatePima, ArizonaUnited States
  10.4 in.38.1 in.
  0.6 in.27.8 in.
  46.9 days106.2 days
  280 days205 days
  98.7°85.8°
  30.3°21.7°
  7.77
  6.84.3
  2838 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 Pima with an average high temperature of 98.7°, which ranks it as about average compared to other places in Arizona. In Pima, there are 3 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for Pima are April, October and March.
In Pima, there are 131.2 days annually when the high temperature is over 90°, which is about average compared to other places in Arizona.
December has the coldest nighttime temperatures for Pima with an average of 30.0°. This is about average compared to other places in Arizona.
In Pima, there are 64.4 days annually when the nighttime low temperature falls below freezing, which is about average compared to other places in Arizona.
In Pima, 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 Pima 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 Pima with 1.8 inches of rain, and the driest month is April with 0.3 inches. The wettest season is Autumn with 36% of yearly precipitation and 13% occurs in Summer, which is the driest season. The annual rainfall of 10.4 inches in Pima means that it is about average compared to other places in Arizona.
August is the rainiest month in Pima with 7.6 days of rain, and June is the driest month with only 1.6 rainy days. There are 46.9 rainy days annually in Pima, which is about average compared to other places in Arizona. The rainiest season is Autumn when it rains 35% of the time and the driest is Summer with only a 15% chance of a rainy day.
An annual snowfall of 0.6 inches in Pima means that it is about average compared to other places in Arizona. February is the snowiest month in Pima with 0.3 inches of snow, and no months of the year have significant snowfall.
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