2025 Compare Climate & Weather:
Oro Valley, AZ vs San Luis, AZ

Highlights

On average, there are 307 sunny days per year in San Luis. Oro Valley averages 279 sunny days per year. The US average is 205 sunny days.

San Luis, Arizona gets 3.5 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.

San Luis averages 0 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

San Luis, Arizona
Summer High: the July high is around 106.8 degrees
Winter Low: the January low is 45.4
Rain: averages 3.5 inches of rain a year
Snow: averages 0 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 San Luis is 7.3 (10=best), which means it is less comfortable than most places in Arizona.

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

78°F

Today's Weather - San Luis, AZ

85°F

Average Monthly High / Low (°F)

Hot, Freezing, Rainy, Snowy Days: Oro Valley / San Luis

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 San Luis with an average high temperature of 106.8°, which ranks it as warmer than most places in Arizona. In San Luis, there are 3 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for San Luis are November, March and February.

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 San Luis with an average of 44.7°. This is one of the warmest places in Arizona.

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 San Luis, there are 174.7 days annually when the high temperature is over 90°, which is one of the hottest places in Arizona.

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 San Luis, there are 1.3 days annually when the nighttime low temperature falls below freezing, which is one of the warmest places in Arizona.

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

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 San Luis with 0.6 inches of rain, and the driest month is June with 0.0 inches. The wettest season is Spring with 39% of yearly precipitation and 14% occurs in Summer, which is the driest season. The annual rainfall of 3.5 inches in San Luis means that it is one of the driest places in Arizona.

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.

January is the rainiest month in San Luis with 2.7 days of rain, and June is the driest month with only 0.2 rainy days. There are 18.1 rainy days annually in San Luis, which is one of the least rainy places in Arizona. The rainiest season is Spring when it rains 41% of the time and the driest is Summer with only a 18% 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.

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

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

Any measurable snowfall is a rare occurance in San Luis.