2025 Compare Climate & Weather:
Dayton, OH vs Fairfax, VA

Highlights

On average, there are 198 sunny days per year in Fairfax. Dayton averages 176 sunny days per year. The US average is 205 sunny days.

Fairfax, Virginia gets 43 inches of rain, on average, per year. Dayton, Ohio gets 40.4 inches of rain, on average, per year. The US average is 38.1 inches of rain per year.

Fairfax averages 21.5 inches of snow per year. Dayton averages 17 inches of snow per year. The US average is 27.8 inches of snow per year.

Weather Highlights

Fairfax, Virginia
Summer High: the July high is around 85.7 degrees
Winter Low: the January low is 23.7
Rain: averages 43 inches of rain a year
Snow: averages 21.5 inches of snow a year

Dayton, Ohio
Summer High: the July high is around 85 degrees
Winter Low: the January low is 21.1
Rain: averages 40.4 inches of rain a year
Snow: averages 17 inches of snow a year

BestPlaces Comfort Index

The annual BestPlaces Comfort Index for Fairfax is 7.3 (10=best), which means it is about average compared to other places in Virginia.

The annual BestPlaces Comfort Index for Dayton is 7.1 (10=best), which means it is more comfortable than most places in Ohio.

Today's Weather - Dayton, OH

52°F

Today's Weather - Fairfax, VA

63°F

Average Monthly High / Low (°F)

Hot, Freezing, Rainy, Snowy Days: Dayton / Fairfax

July is the hottest month for Dayton with an average high temperature of 85.0°, which ranks it as warmer than most places in Ohio. In Dayton, there are 4 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for Dayton are September, June and May.

July is the hottest month for Fairfax with an average high temperature of 85.7°, which ranks it as cooler than most places in Virginia. In Fairfax, there are 4 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for Fairfax are September, June and May.

January has the coldest nighttime temperatures for Dayton with an average of 21.1°. This is warmer than most places in Ohio.

January has the coldest nighttime temperatures for Fairfax with an average of 23.7°. This is about average compared to other places in Virginia.

In Dayton, there are 17.2 days annually when the high temperature is over 90°, which is hotter than most places in Ohio.

In Fairfax, there are 18.6 days annually when the high temperature is over 90°, which is cooler than most places in Virginia.

In Dayton, there are 104.8 days annually when the nighttime low temperature falls below freezing, which is one of the warmest places in Ohio.

In Fairfax, there are 102.5 days annually when the nighttime low temperature falls below freezing, which is about average compared to other places in Virginia.

In Dayton, there are 2.8 days annually when the nighttime low temperature falls below zero°, which is warmer than most places in Ohio.

In Fairfax, there are 0.6 days annually when the nighttime low temperature falls below zero°, which is colder than most places in Virginia.

May is the wettest month in Dayton with 4.7 inches of rain, and the driest month is February with 2.3 inches. The wettest season is Summer with 30% of yearly precipitation and 20% occurs in Spring, which is the driest season. The annual rainfall of 40.4 inches in Dayton means that it is wetter than most places in Ohio.


May is the wettest month in Fairfax with 4.6 inches of rain, and the driest month is February with 2.8 inches. The wettest season is Summer with 27% of yearly precipitation and 20% occurs in Spring, which is the driest season. The annual rainfall of 43.0 inches in Fairfax means that it is drier than most places in Virginia.

May is the rainiest month in Dayton with 13.2 days of rain, and August is the driest month with only 8.0 rainy days. There are 128.8 rainy days annually in Dayton, which is about average compared to other places in Ohio. The rainiest season is Summer when it rains 29% of the time and the driest is Winter with only a 22% chance of a rainy day.

May is the rainiest month in Fairfax with 12.2 days of rain, and October is the driest month with only 8.2 rainy days. There are 119.2 rainy days annually in Fairfax, which is rainier than most places in Virginia. The rainiest season is Summer when it rains 28% of the time and the driest is Winter with only a 22% chance of a rainy day.

An annual snowfall of 17.0 inches in Dayton means that it is less snowy than most places in Ohio.

An annual snowfall of 21.5 inches in Fairfax means that it is one of the snowiest places in Virginia.

January is the snowiest month in Dayton with 5.9 inches of snow, and 4 months of the year have significant snowfall.

February is the snowiest month in Fairfax with 7.8 inches of snow, and 5 months of the year have significant snowfall.