2025 Compare Climate & Weather:
Oro Valley, AZ vs Gresham, OR

Highlights

On average, there are 144 sunny days per year in Gresham. Oro Valley averages 279 sunny days per year. The US average is 205 sunny days.

Gresham, Oregon gets 56.1 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.

Gresham averages 3.3 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

Gresham, Oregon
Summer High: the July high is around 80.4 degrees
Winter Low: the January low is 33.8
Rain: averages 56.1 inches of rain a year
Snow: averages 3.3 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 Gresham is 7.3 (10=best), which means it is more comfortable than most places in Oregon.

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

66°F

Today's Weather - Gresham, OR

43°F

Average Monthly High / Low (°F)

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

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.

August is the hottest month for Gresham with an average high temperature of 81.0°, which ranks it as cooler than most places in Oregon. In Gresham, there are 4 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for Gresham are July, September and August.

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 Gresham with an average of 33.1°. This is about average compared to other places in Oregon.

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 Gresham, there are 12.9 days annually when the high temperature is over 90°, which is cooler than most places in Oregon.

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 Gresham, there are 49.7 days annually when the nighttime low temperature falls below freezing, which is about average compared to other places in Oregon.

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

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.


November is the wettest month in Gresham with 8.7 inches of rain, and the driest month is July with 0.9 inches. The wettest season is Spring with 39% of yearly precipitation and 8% occurs in Autumn, which is the driest season. The annual rainfall of 56.1 inches in Gresham means that it is wetter than most places in Oregon.

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.

November is the rainiest month in Gresham with 19.6 days of rain, and August is the driest month with only 4.0 rainy days. There are 164.0 rainy days annually in Gresham, which is rainier than most places in Oregon. The rainiest season is Spring when it rains 33% of the time and the driest is Autumn with only a 11% 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 3.3 inches in Gresham means that it is about average compared to other places in Oregon.

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

January is the snowiest month in Gresham with 1.1 inches of snow, and 3 months of the year have significant snowfall.