2025 Compare Climate & Weather:
Tucson, AZ vs Charleston, SC

Highlights

On average, there are 209 sunny days per year in Charleston. Tucson averages 286 sunny days per year. The US average is 205 sunny days.

Charleston, South Carolina gets 48.3 inches of rain, on average, per year. Tucson, Arizona gets 12.3 inches of rain, on average, per year. The US average is 38.1 inches of rain per year.

Charleston averages 0.4 inches of snow per year. Tucson averages 0.4 inches of snow per year. The US average is 27.8 inches of snow per year.

Weather Highlights

Charleston, South Carolina
Summer High: the July high is around 89.9 degrees
Winter Low: the January low is 39.3
Rain: averages 48.3 inches of rain a year
Snow: averages 0.4 inches of snow a year

Tucson, Arizona
Summer High: the July high is around 100.2 degrees
Winter Low: the January low is 38.7
Rain: averages 12.3 inches of rain a year
Snow: averages 0.4 inches of snow a year

BestPlaces Comfort Index

The annual BestPlaces Comfort Index for Charleston is 7.2 (10=best), which means it is less comfortable than most places in South Carolina.

The annual BestPlaces Comfort Index for Tucson is 7.5 (10=best), which means it is about average compared to other places in Arizona.

Today's Weather - Tucson, AZ

82°F

Today's Weather - Charleston, SC

80°F

Average Monthly High / Low (°F)

Hot, Freezing, Rainy, Snowy Days: Tucson / Charleston

June is the hottest month for Tucson with an average high temperature of 100.5°, which ranks it as warmer than most places in Arizona. In Tucson, there are 3 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for Tucson are March, November and April.

July is the hottest month for Charleston with an average high temperature of 89.9°, which ranks it as cooler than most places in South Carolina. In Charleston, there are 4 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for Charleston are October, May and April.

December has the coldest nighttime temperatures for Tucson with an average of 38.0°. This is warmer than most places in Arizona.

January has the coldest nighttime temperatures for Charleston with an average of 39.3°. This is one of the warmest places in South Carolina.

In Tucson, there are 149.2 days annually when the high temperature is over 90°, which is hotter than most places in Arizona.

In Charleston, there are 41.1 days annually when the high temperature is over 90°, which is cooler than most places in South Carolina.

In Tucson, there are 17.0 days annually when the nighttime low temperature falls below freezing, which is warmer than most places in Arizona.

In Charleston, there are 17.5 days annually when the nighttime low temperature falls below freezing, which is one of the warmest places in South Carolina.

In Tucson, 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 Charleston, there are 0.0 days annually when the nighttime low temperature falls below zero°, which is about average compared to other places in South Carolina.

August is the wettest month in Tucson with 2.4 inches of rain, and the driest month is May with 0.2 inches. The wettest season is Autumn with 40% of yearly precipitation and 11% occurs in Summer, which is the driest season. The annual rainfall of 12.3 inches in Tucson means that it is about average compared to other places in Arizona.


August is the wettest month in Charleston with 6.7 inches of rain, and the driest month is May with 2.5 inches. The wettest season is Autumn with 36% of yearly precipitation and 19% occurs in Summer, which is the driest season. The annual rainfall of 48.3 inches in Charleston means that it is wetter than most places in South Carolina.

August is the rainiest month in Tucson with 9.5 days of rain, and June is the driest month with only 1.4 rainy days. There are 51.5 rainy days annually in Tucson, which is about average compared to other places in Arizona. The rainiest season is Autumn when it rains 38% of the time and the driest is Summer with only a 15% chance of a rainy day.

August is the rainiest month in Charleston with 11.7 days of rain, and May is the driest month with only 6.8 rainy days. There are 105.9 rainy days annually in Charleston, which is rainier than most places in South Carolina. The rainiest season is Autumn when it rains 32% of the time and the driest is Summer with only a 21% chance of a rainy day.

An annual snowfall of 0.4 inches in Tucson means that it is about average compared to other places in Arizona.

An annual snowfall of 0.4 inches in Charleston means that it is less snowy than most places in South Carolina.

January is the snowiest month in Tucson with 0.2 inches of snow, and no months of the year have significant snowfall.

December is the snowiest month in Charleston with 0.2 inches of snow, and no months of the year have significant snowfall.