2025 Compare Climate & Weather:
Grand Junction, CO vs Rio Rico, AZ

Highlights

On average, there are 284 sunny days per year in Rio Rico. Grand Junction averages 245 sunny days per year. The US average is 205 sunny days.

Rio Rico, Arizona gets 17.3 inches of rain, on average, per year. Grand Junction, Colorado gets 9.9 inches of rain, on average, per year. The US average is 38.1 inches of rain per year.

Rio Rico averages 0.8 inches of snow per year. Grand Junction averages 15.8 inches of snow per year. The US average is 27.8 inches of snow per year.

Weather Highlights

Rio Rico, Arizona
Summer High: the July high is around 94.5 degrees
Winter Low: the January low is 30.9
Rain: averages 17.3 inches of rain a year
Snow: averages 0.8 inches of snow a year

Grand Junction, Colorado
Summer High: the July high is around 92.8 degrees
Winter Low: the January low is 17.8
Rain: averages 9.9 inches of rain a year
Snow: averages 15.8 inches of snow a year

BestPlaces Comfort Index

The annual BestPlaces Comfort Index for Rio Rico is 8.0 (10=best), which means it is one of the most pleasant places in Arizona.

The annual BestPlaces Comfort Index for Grand Junction is 7.4 (10=best), which means it is one of the most pleasant places in Colorado.

Today's Weather - Grand Junction, CO

67°F

Today's Weather - Rio Rico, AZ

76°F

Average Monthly High / Low (°F)

Hot, Freezing, Rainy, Snowy Days: Grand Junction / Rio Rico

July is the hottest month for Grand Junction with an average high temperature of 92.8°, which ranks it as one of the hottest places in Colorado. In Grand Junction, there are 2 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for Grand Junction are May, September and June.

June is the hottest month for Rio Rico with an average high temperature of 96.4°, which ranks it as about average compared to other places in Arizona. In Rio Rico, there are 4 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for Rio Rico are April, October and November.

January has the coldest nighttime temperatures for Grand Junction with an average of 17.8°. This is warmer than most places in Colorado.

December has the coldest nighttime temperatures for Rio Rico with an average of 30.5°. This is about average compared to other places in Arizona.

In Grand Junction, there are 54.9 days annually when the high temperature is over 90°, which is one of the hottest places in Colorado.

In Rio Rico, there are 105.5 days annually when the high temperature is over 90°, which is about average compared to other places in Arizona.

In Grand Junction, there are 130.1 days annually when the nighttime low temperature falls below freezing, which is one of the warmest places in Colorado.

In Rio Rico, there are 68.6 days annually when the nighttime low temperature falls below freezing, which is about average compared to other places in Arizona.

In Grand Junction, there are 2.1 days annually when the nighttime low temperature falls below zero°, which is one of the warmest places in Colorado.

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

September is the wettest month in Grand Junction with 1.2 inches of rain, and the driest month is January with 0.5 inches. The wettest season is Winter with 32% of yearly precipitation and 16% occurs in Spring, which is the driest season. The annual rainfall of 9.9 inches in Grand Junction means that it is one of the driest places in Colorado.


August is the wettest month in Rio Rico with 4.1 inches of rain, and the driest month is May with 0.3 inches. The wettest season is Autumn with 50% of yearly precipitation and 10% occurs in Summer, which is the driest season. The annual rainfall of 17.3 inches in Rio Rico means that it is wetter than most places in Arizona.

April is the rainiest month in Grand Junction with 6.9 days of rain, and June is the driest month with only 3.8 rainy days. There are 68.9 rainy days annually in Grand Junction, which is less rainy than most places in Colorado. The rainiest season is Summer when it rains 28% of the time and the driest is Spring with only a 22% chance of a rainy day.

August is the rainiest month in Rio Rico with 12.4 days of rain, and May is the driest month with only 1.6 rainy days. There are 59.6 rainy days annually in Rio Rico, which is rainier than most places in Arizona. The rainiest season is Autumn when it rains 45% of the time and the driest is Summer with only a 12% chance of a rainy day.

An annual snowfall of 15.8 inches in Grand Junction means that it is one of the least snowy places in Colorado.

An annual snowfall of 0.8 inches in Rio Rico means that it is about average compared to other places in Arizona.

December is the snowiest month in Grand Junction with 4.3 inches of snow, and 6 months of the year have significant snowfall.

December is the snowiest month in Rio Rico with 0.4 inches of snow, and no months of the year have significant snowfall.