2025 Compare Climate & Weather:
San Ramon, CA vs Champaign, IL

Highlights

On average, there are 194 sunny days per year in Champaign. San Ramon averages 256 sunny days per year. The US average is 205 sunny days.

Champaign, Illinois gets 40.7 inches of rain, on average, per year. San Ramon, California gets 19 inches of rain, on average, per year. The US average is 38.1 inches of rain per year.

Champaign averages 20.3 inches of snow per year. San Ramon averages 0 inches of snow per year. The US average is 27.8 inches of snow per year.

Weather Highlights

Champaign, Illinois
Summer High: the July high is around 84.4 degrees
Winter Low: the January low is 16.6
Rain: averages 40.7 inches of rain a year
Snow: averages 20.3 inches of snow a year

San Ramon, California
Summer High: the July high is around 84.4 degrees
Winter Low: the January low is 39.2
Rain: averages 19 inches of rain a year
Snow: averages 0 inches of snow a year

BestPlaces Comfort Index

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

The annual BestPlaces Comfort Index for San Ramon is 8.5 (10=best), which means it is more comfortable than most places in California.

Today's Weather - San Ramon, CA

55°F

Today's Weather - Champaign, IL

49°F

Average Monthly High / Low (°F)

Hot, Freezing, Rainy, Snowy Days: San Ramon / Champaign

July is the hottest month for San Ramon with an average high temperature of 84.4°, which ranks it as cooler than most places in California. In San Ramon, there are 6 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for San Ramon are June, October and May.

July is the hottest month for Champaign with an average high temperature of 84.4°, which ranks it as cooler than most places in Illinois. In Champaign, there are 5 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for Champaign are September, May and June.

January has the coldest nighttime temperatures for San Ramon with an average of 39.2°. This is warmer than most places in California.

January has the coldest nighttime temperatures for Champaign with an average of 16.6°. This is about average compared to other places in Illinois.

In San Ramon, there are 35.4 days annually when the high temperature is over 90°, which is cooler than most places in California.

In Champaign, there are 15.1 days annually when the high temperature is over 90°, which is cooler than most places in Illinois.

In San Ramon, there are 11.1 days annually when the nighttime low temperature falls below freezing, which is warmer than most places in California.

In Champaign, there are 124.1 days annually when the nighttime low temperature falls below freezing, which is about average compared to other places in Illinois.

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

In Champaign, there are 6.5 days annually when the nighttime low temperature falls below zero°, which is about average compared to other places in Illinois.

February is the wettest month in San Ramon with 3.5 inches of rain, and the driest month is July with 0.0 inches. The wettest season is Spring with 55% of yearly precipitation and 1% occurs in Autumn, which is the driest season. The annual rainfall of 19.0 inches in San Ramon means that it is about average compared to other places in California.


July is the wettest month in Champaign with 4.7 inches of rain, and the driest month is January with 2.0 inches. The wettest season is Autumn with 31% of yearly precipitation and 17% occurs in Spring, which is the driest season. The annual rainfall of 40.7 inches in Champaign means that it is wetter than most places in Illinois.

December is the rainiest month in San Ramon with 10.9 days of rain, and July is the driest month with only 0.2 rainy days. There are 64.2 rainy days annually in San Ramon, 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.

May is the rainiest month in Champaign with 11.5 days of rain, and September is the driest month with only 7.1 rainy days. There are 111.0 rainy days annually in Champaign, which is rainier than most places in Illinois. The rainiest season is Summer when it rains 29% of the time and the driest is Winter with only a 23% chance of a rainy day.

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

An annual snowfall of 20.3 inches in Champaign means that it is about average compared to other places in Illinois.

Any measurable snowfall is a rare occurance in San Ramon.

January is the snowiest month in Champaign with 5.9 inches of snow, and 5 months of the year have significant snowfall.