2025 Compare Climate & Weather:
Seattle, WA vs Dayton, OH

Highlights

On average, there are 176 sunny days per year in Dayton. Seattle averages 152 sunny days per year. The US average is 205 sunny days.

Dayton, Ohio gets 40.4 inches of rain, on average, per year. Seattle, Washington gets 38 inches of rain, on average, per year. The US average is 38.1 inches of rain per year.

Dayton averages 17 inches of snow per year. Seattle averages 4.6 inches of snow per year. The US average is 27.8 inches of snow per year.

Weather Highlights

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

Seattle, Washington
Summer High: the July high is around 75.8 degrees
Winter Low: the January low is 37
Rain: averages 38 inches of rain a year
Snow: averages 4.6 inches of snow a year

BestPlaces Comfort Index

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

The annual BestPlaces Comfort Index for Seattle is 7.5 (10=best), which means it is one of the most pleasant places in Washington.

Today's Weather - Seattle, WA

56°F

Today's Weather - Dayton, OH

52°F

Average Monthly High / Low (°F)

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

August is the hottest month for Seattle with an average high temperature of 76.3°, which ranks it as cooler than most places in Washington. In Seattle, there are 4 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for Seattle are August, July and September.

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.

December has the coldest nighttime temperatures for Seattle with an average of 35.9°. This is one of the warmest places in Washington.

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

In Seattle, there are 1.7 days annually when the high temperature is over 90°, which is cooler than most places in Washington.

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

In Seattle, there are 24.0 days annually when the nighttime low temperature falls below freezing, which is one of the warmest places in Washington.

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

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

November is the wettest month in Seattle with 6.2 inches of rain, and the driest month is July with 0.8 inches. The wettest season is Spring with 39% of yearly precipitation and 9% occurs in Autumn, which is the driest season. The annual rainfall of 38.0 inches in Seattle means that it is about average compared to other places in Washington.


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.

November is the rainiest month in Seattle with 18.7 days of rain, and August is the driest month with only 5.3 rainy days. There are 155.3 rainy days annually in Seattle, which is about average compared to other places in Washington. The rainiest season is Spring when it rains 33% of the time and the driest is Autumn with only a 13% chance of a rainy day.

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.

An annual snowfall of 4.6 inches in Seattle means that it is about average compared to other places in Washington.

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

December is the snowiest month in Seattle with 2.1 inches of snow, and 4 months of the year have significant snowfall.

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