2025 Compare Climate & Weather:
San Diego, CA vs Coralville, IA

Highlights

On average, there are 198 sunny days per year in Coralville. San Diego averages 266 sunny days per year. The US average is 205 sunny days.

Coralville, Iowa gets 36.9 inches of rain, on average, per year. San Diego, California gets 11.7 inches of rain, on average, per year. The US average is 38.1 inches of rain per year.

Coralville averages 26.8 inches of snow per year. San Diego averages 0 inches of snow per year. The US average is 27.8 inches of snow per year.

Weather Highlights

Coralville, Iowa
Summer High: the July high is around 85.1 degrees
Winter Low: the January low is 13.2
Rain: averages 36.9 inches of rain a year
Snow: averages 26.8 inches of snow a year

San Diego, California
Summer High: the July high is around 78.5 degrees
Winter Low: the January low is 45.6
Rain: averages 11.7 inches of rain a year
Snow: averages 0 inches of snow a year

BestPlaces Comfort Index

The annual BestPlaces Comfort Index for Coralville is 7.0 (10=best), which means it is more comfortable than most places in Iowa.

The annual BestPlaces Comfort Index for San Diego is 9.2 (10=best), which means it is one of the most pleasant places in California.

Today's Weather - San Diego, CA

68°F

Today's Weather - Coralville, IA

52°F

Average Monthly High / Low (°F)

Hot, Freezing, Rainy, Snowy Days: San Diego / Coralville

August is the hottest month for San Diego with an average high temperature of 80.2°, which ranks it as cooler than most places in California. In San Diego, there are 7 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for San Diego are July, September and August.

July is the hottest month for Coralville with an average high temperature of 85.1°, which ranks it as warmer than most places in Iowa. In Coralville, there are 4 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for Coralville are September, June and August.

December has the coldest nighttime temperatures for San Diego with an average of 45.3°. This is one of the warmest places in California.

January has the coldest nighttime temperatures for Coralville with an average of 13.2°. This is warmer than most places in Iowa.

In San Diego, there are 13.4 days annually when the high temperature is over 90°, which is cooler than most places in California.

In Coralville, there are 16.4 days annually when the high temperature is over 90°, which is hotter than most places in Iowa.

In San Diego, there are 0.7 days annually when the nighttime low temperature falls below freezing, which is one of the warmest places in California.

In Coralville, there are 133.8 days annually when the nighttime low temperature falls below freezing, which is warmer than most places in Iowa.

In San Diego, 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 Coralville, there are 12.4 days annually when the nighttime low temperature falls below zero°, which is warmer than most places in Iowa.

February is the wettest month in San Diego with 2.5 inches of rain, and the driest month is August with 0.0 inches. The wettest season is Spring with 55% of yearly precipitation and 2% occurs in Autumn, which is the driest season. The annual rainfall of 11.7 inches in San Diego means that it is drier than most places in California.


July is the wettest month in Coralville with 4.8 inches of rain, and the driest month is January with 1.0 inches. The wettest season is Autumn with 39% of yearly precipitation and 10% occurs in Spring, which is the driest season. The annual rainfall of 36.9 inches in Coralville means that it is wetter than most places in Iowa.

February is the rainiest month in San Diego with 6.8 days of rain, and August is the driest month with only 0.4 rainy days. There are 38.4 rainy days annually in San Diego, which is less rainy than most places in California. The rainiest season is Spring when it rains 48% of the time and the driest is Autumn with only a 4% chance of a rainy day.

May is the rainiest month in Coralville with 11.2 days of rain, and February is the driest month with only 5.4 rainy days. There are 97.4 rainy days annually in Coralville, which is about average compared to other places in Iowa. The rainiest season is Summer when it rains 29% of the time and the driest is Spring with only a 19% chance of a rainy day.

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

An annual snowfall of 26.8 inches in Coralville means that it is less snowy than most places in Iowa.

Any measurable snowfall is a rare occurance in San Diego.

December is the snowiest month in Coralville with 8.1 inches of snow, and 6 months of the year have significant snowfall.