2025 Compare Climate & Weather:
Scottsdale, AZ vs Round Rock, TX

Highlights

On average, there are 232 sunny days per year in Round Rock. Scottsdale averages 299 sunny days per year. The US average is 205 sunny days.

Round Rock, Texas gets 36 inches of rain, on average, per year. Scottsdale, Arizona gets 10.5 inches of rain, on average, per year. The US average is 38.1 inches of rain per year.

Round Rock averages 0.2 inches of snow per year. Scottsdale averages 0 inches of snow per year. The US average is 27.8 inches of snow per year.

Weather Highlights

Round Rock, Texas
Summer High: the July high is around 95 degrees
Winter Low: the January low is 38
Rain: averages 36 inches of rain a year
Snow: averages 0.2 inches of snow a year

Scottsdale, Arizona
Summer High: the July high is around 104.3 degrees
Winter Low: the January low is 42.4
Rain: averages 10.5 inches of rain a year
Snow: averages 0 inches of snow a year

BestPlaces Comfort Index

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

The annual BestPlaces Comfort Index for Scottsdale is 7.3 (10=best), which means it is less comfortable than most places in Arizona.

Today's Weather - Scottsdale, AZ

56°F

Today's Weather - Round Rock, TX

78°F

Average Monthly High / Low (°F)

Hot, Freezing, Rainy, Snowy Days: Scottsdale / Round Rock

July is the hottest month for Scottsdale with an average high temperature of 104.3°, which ranks it as warmer than most places in Arizona. In Scottsdale, there are 3 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for Scottsdale are March, November and April.

August is the hottest month for Round Rock with an average high temperature of 96.3°, which ranks it as warmer than most places in Texas. In Round Rock, there are 4 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for Round Rock are April, October and March.

December has the coldest nighttime temperatures for Scottsdale with an average of 41.6°. This is warmer than most places in Arizona.

January has the coldest nighttime temperatures for Round Rock with an average of 38.0°. This is about average compared to other places in Texas.

In Scottsdale, there are 160.2 days annually when the high temperature is over 90°, which is hotter than most places in Arizona.

In Round Rock, there are 104.7 days annually when the high temperature is over 90°, which is hotter than most places in Texas.

In Scottsdale, there are 4.5 days annually when the nighttime low temperature falls below freezing, which is warmer than most places in Arizona.

In Round Rock, there are 22.7 days annually when the nighttime low temperature falls below freezing, which is about average compared to other places in Texas.

In Scottsdale, 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 Round Rock, there are 0.0 days annually when the nighttime low temperature falls below zero°, which is about average compared to other places in Texas.

August is the wettest month in Scottsdale with 1.3 inches of rain, and the driest month is June with 0.1 inches. The wettest season is Spring with 36% of yearly precipitation and 18% occurs in Summer, which is the driest season. The annual rainfall of 10.5 inches in Scottsdale means that it is about average compared to other places in Arizona.


June is the wettest month in Round Rock with 4.6 inches of rain, and the driest month is January with 2.2 inches. The wettest season is Winter with 28% of yearly precipitation and 19% occurs in Spring, which is the driest season. The annual rainfall of 36.0 inches in Round Rock means that it is about average compared to other places in Texas.

August is the rainiest month in Scottsdale with 5.1 days of rain, and June is the driest month with only 0.5 rainy days. There are 37.7 rainy days annually in Scottsdale, which is less rainy than most places in Arizona. The rainiest season is Spring when it rains 34% of the time and the driest is Summer with only a 19% chance of a rainy day.

March is the rainiest month in Round Rock with 8.3 days of rain, and August is the driest month with only 4.4 rainy days. There are 78.4 rainy days annually in Round Rock, which is rainier than most places in Texas. The rainiest season is Summer when it rains 29% of the time and the driest is Autumn with only a 21% chance of a rainy day.

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

An annual snowfall of 0.2 inches in Round Rock means that it is about average compared to other places in Texas.

Any measurable snowfall is a rare occurance in Scottsdale.

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