2025 Compare Climate & Weather:
Oro Valley, AZ vs Nampa, ID

Highlights

On average, there are 207 sunny days per year in Nampa. Oro Valley averages 279 sunny days per year. The US average is 205 sunny days.

Nampa, Idaho gets 10.7 inches of rain, on average, per year. Oro Valley, Arizona gets 13.5 inches of rain, on average, per year. The US average is 38.1 inches of rain per year.

Nampa averages 9.2 inches of snow per year. Oro Valley averages 0.3 inches of snow per year. The US average is 27.8 inches of snow per year.

Weather Highlights

Nampa, Idaho
Summer High: the July high is around 91.3 degrees
Winter Low: the January low is 23.6
Rain: averages 10.7 inches of rain a year
Snow: averages 9.2 inches of snow a year

Oro Valley, Arizona
Summer High: the July high is around 100.2 degrees
Winter Low: the January low is 36.9
Rain: averages 13.5 inches of rain a year
Snow: averages 0.3 inches of snow a year

BestPlaces Comfort Index

The annual BestPlaces Comfort Index for Nampa is 7.3 (10=best), which means it is one of the most pleasant places in Idaho.

The annual BestPlaces Comfort Index for Oro Valley is 7.6 (10=best), which means it is about average compared to other places in Arizona.

Today's Weather - Oro Valley, AZ

94°F

Today's Weather - Nampa, ID

86°F

Average Monthly High / Low (°F)

Hot, Freezing, Rainy, Snowy Days: Oro Valley / Nampa

June is the hottest month for Oro Valley with an average high temperature of 100.5°, which ranks it as warmer than most places in Arizona. In Oro Valley, there are 3 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for Oro Valley are November, March and April.

July is the hottest month for Nampa with an average high temperature of 91.3°, which ranks it as warmer than most places in Idaho. In Nampa, there are 3 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for Nampa are September, May and June.

December has the coldest nighttime temperatures for Oro Valley with an average of 35.8°. This is warmer than most places in Arizona.

December has the coldest nighttime temperatures for Nampa with an average of 22.7°. This is warmer than most places in Idaho.

In Oro Valley, there are 147.2 days annually when the high temperature is over 90°, which is hotter than most places in Arizona.

In Nampa, there are 47.8 days annually when the high temperature is over 90°, which is hotter than most places in Idaho.

In Oro Valley, there are 30.9 days annually when the nighttime low temperature falls below freezing, which is warmer than most places in Arizona.

In Nampa, there are 116.6 days annually when the nighttime low temperature falls below freezing, which is one of the warmest places in Idaho.

In Oro 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 Nampa, there are 2.8 days annually when the nighttime low temperature falls below zero°, which is warmer than most places in Idaho.

August is the wettest month in Oro Valley with 2.6 inches of rain, and the driest month is May with 0.3 inches. The wettest season is Autumn with 38% of yearly precipitation and 13% occurs in Summer, which is the driest season. The annual rainfall of 13.5 inches in Oro Valley means that it is wetter than most places in Arizona.


December is the wettest month in Nampa with 1.5 inches of rain, and the driest month is July with 0.3 inches. The wettest season is Spring with 33% of yearly precipitation and 12% occurs in Autumn, which is the driest season. The annual rainfall of 10.7 inches in Nampa means that it is drier than most places in Idaho.

August is the rainiest month in Oro Valley with 9.5 days of rain, and June is the driest month with only 1.2 rainy days. There are 51.0 rainy days annually in Oro Valley, which is about average compared to other places in Arizona. The rainiest season is Autumn when it rains 37% of the time and the driest is Summer with only a 15% chance of a rainy day.

December is the rainiest month in Nampa with 10.4 days of rain, and July is the driest month with only 2.3 rainy days. There are 80.1 rainy days annually in Nampa, which is less rainy than most places in Idaho. The rainiest season is Spring when it rains 34% of the time and the driest is Autumn with only a 12% chance of a rainy day.

An annual snowfall of 0.3 inches in Oro Valley means that it is about average compared to other places in Arizona.

An annual snowfall of 9.2 inches in Nampa means that it is one of the least snowy places in Idaho.

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

December is the snowiest month in Nampa with 4.0 inches of snow, and 4 months of the year have significant snowfall.