2025 Compare Climate & Weather:
Dayton, OH vs San Jose, CA

Highlights

On average, there are 257 sunny days per year in San Jose. Dayton averages 176 sunny days per year. The US average is 205 sunny days.

San Jose, California gets 17.2 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.

San Jose averages 0 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

San Jose, California
Summer High: the July high is around 81.9 degrees
Winter Low: the January low is 41.6
Rain: averages 17.2 inches of rain a year
Snow: averages 0 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 San Jose is 8.8 (10=best), which means it is more comfortable than most places in California.

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

79°F

Today's Weather - San Jose, CA

72°F

Average Monthly High / Low (°F)

Hot, Freezing, Rainy, Snowy Days: Dayton / San Jose

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.

August is the hottest month for San Jose with an average high temperature of 81.9°, which ranks it as cooler than most places in California. In San Jose, there are 6 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for San Jose are June, September and May.

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

December has the coldest nighttime temperatures for San Jose with an average of 41.5°. This is warmer than most places in California.

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

In San Jose, there are 16.9 days annually when the high temperature is over 90°, which is cooler than most places in California.

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 San Jose, there are 4.5 days annually when the nighttime low temperature falls below freezing, which is warmer than most places in California.

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

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.


February is the wettest month in San Jose with 3.5 inches of rain, and the driest month is July with 0.0 inches. The wettest season is Spring with 57% of yearly precipitation and 1% occurs in Autumn, which is the driest season. The annual rainfall of 17.2 inches in San Jose means that it is about average compared to other places in California.

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.

December is the rainiest month in San Jose with 10.3 days of rain, and July is the driest month with only 0.2 rainy days. There are 61.8 rainy days annually in San Jose, which is rainier than most places in California. The rainiest season is Spring when it rains 50% of the time and the driest is Autumn with only a 2% 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.

There is rarely any recorded snowfall in San Jose, ranking it as one of the least snowy places in California.

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

Any measurable snowfall is a rare occurance in San Jose.