2025 Compare Climate & Weather:
Green Valley, AZ vs Castle Pines, CO

Highlights

On average, there are 245 sunny days per year in Castle Pines. Green Valley averages 280 sunny days per year. The US average is 205 sunny days.

Castle Pines, Colorado gets 18.1 inches of rain, on average, per year. Green Valley, Arizona gets 14.3 inches of rain, on average, per year. The US average is 38.1 inches of rain per year.

Castle Pines averages 75.5 inches of snow per year. Green Valley averages 0.2 inches of snow per year. The US average is 27.8 inches of snow per year.

Weather Highlights

Castle Pines, Colorado
Summer High: the July high is around 85.4 degrees
Winter Low: the January low is 18.5
Rain: averages 18.1 inches of rain a year
Snow: averages 75.5 inches of snow a year

Green Valley, Arizona
Summer High: the July high is around 98.6 degrees
Winter Low: the January low is 36.2
Rain: averages 14.3 inches of rain a year
Snow: averages 0.2 inches of snow a year

BestPlaces Comfort Index

The annual BestPlaces Comfort Index for Castle Pines is 7.2 (10=best), which means it is more comfortable than most places in Colorado.

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

Today's Weather - Green Valley, AZ

50°F

Today's Weather - Castle Pines, CO

38°F

Average Monthly High / Low (°F)

Hot, Freezing, Rainy, Snowy Days: Green Valley / Castle Pines

June is the hottest month for Green Valley with an average high temperature of 99.2°, which ranks it as about average compared to other places in Arizona. In Green Valley, there are 4 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for Green Valley are April, March and November.

July is the hottest month for Castle Pines with an average high temperature of 85.4°, which ranks it as about average compared to other places in Colorado. In Castle Pines, there are 3 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for Castle Pines are June, September and August.

December has the coldest nighttime temperatures for Green Valley with an average of 35.6°. This is warmer than most places in Arizona.

December has the coldest nighttime temperatures for Castle Pines with an average of 18.2°. This is one of the warmest places in Colorado.

In Green Valley, there are 138.7 days annually when the high temperature is over 90°, which is about average compared to other places in Arizona.

In Castle Pines, there are 14.8 days annually when the high temperature is over 90°, which is cooler than most places in Colorado.

In Green Valley, there are 29.4 days annually when the nighttime low temperature falls below freezing, which is warmer than most places in Arizona.

In Castle Pines, there are 156.6 days annually when the nighttime low temperature falls below freezing, which is warmer than most places in Colorado.

In Green 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 Castle Pines, there are 5.5 days annually when the nighttime low temperature falls below zero°, which is warmer than most places in Colorado.

July is the wettest month in Green Valley with 3.2 inches of rain, and the driest month is April with 0.3 inches. The wettest season is Autumn with 45% of yearly precipitation and 11% occurs in Summer, which is the driest season. The annual rainfall of 14.3 inches in Green Valley means that it is wetter than most places in Arizona.


July is the wettest month in Castle Pines with 2.8 inches of rain, and the driest month is February with 0.5 inches. The wettest season is Autumn with 43% of yearly precipitation and 9% occurs in Spring, which is the driest season. The annual rainfall of 18.1 inches in Castle Pines means that it is wetter than most places in Colorado.

August is the rainiest month in Green Valley with 10.2 days of rain, and May is the driest month with only 1.6 rainy days. There are 53.5 rainy days annually in Green Valley, which is rainier than most places in Arizona. The rainiest season is Autumn when it rains 41% of the time and the driest is Summer with only a 14% chance of a rainy day.

August is the rainiest month in Castle Pines with 10.2 days of rain, and January is the driest month with only 3.4 rainy days. There are 72.6 rainy days annually in Castle Pines, which is less rainy than most places in Colorado. The rainiest season is Autumn when it rains 37% of the time and the driest is Spring with only a 15% chance of a rainy day.

An annual snowfall of 0.2 inches in Green Valley means that it is less snowy than most places in Arizona.

An annual snowfall of 75.5 inches in Castle Pines means that it is snowier than most places in Colorado.

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

March is the snowiest month in Castle Pines with 16.3 inches of snow, and 9 months of the year have significant snowfall.