2025 Compare Climate & Weather:
Oak Ridge, TN vs Iowa City, IA

Highlights

On average, there are 199 sunny days per year in Iowa City. Oak Ridge averages 208 sunny days per year. The US average is 205 sunny days.

Iowa City, Iowa gets 36.9 inches of rain, on average, per year. Oak Ridge, Tennessee gets 52.7 inches of rain, on average, per year. The US average is 38.1 inches of rain per year.

Iowa City averages 26.8 inches of snow per year. Oak Ridge averages 6.2 inches of snow per year. The US average is 27.8 inches of snow per year.

Weather Highlights

Iowa City, Iowa
Summer High: the July high is around 85.1 degrees
Winter Low: the January low is 13.3
Rain: averages 36.9 inches of rain a year
Snow: averages 26.8 inches of snow a year

Oak Ridge, Tennessee
Summer High: the July high is around 88.5 degrees
Winter Low: the January low is 28.3
Rain: averages 52.7 inches of rain a year
Snow: averages 6.2 inches of snow a year

BestPlaces Comfort Index

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

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

Today's Weather - Oak Ridge, TN

60°F

Today's Weather - Iowa City, IA

46°F

Average Monthly High / Low (°F)

Hot, Freezing, Rainy, Snowy Days: Oak Ridge / Iowa City

July is the hottest month for Oak Ridge with an average high temperature of 88.5°, which ranks it as about average compared to other places in Tennessee. In Oak Ridge, there are 4 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for Oak Ridge are May, September and October.

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

January has the coldest nighttime temperatures for Oak Ridge with an average of 28.3°. This is warmer than most places in Tennessee.

January has the coldest nighttime temperatures for Iowa City with an average of 13.3°. This is warmer than most places in Iowa.

In Oak Ridge, there are 33.1 days annually when the high temperature is over 90°, which is about average compared to other places in Tennessee.

In Iowa City, there are 16.6 days annually when the high temperature is over 90°, which is hotter than most places in Iowa.

In Oak Ridge, there are 74.8 days annually when the nighttime low temperature falls below freezing, which is warmer than most places in Tennessee.

In Iowa City, there are 133.3 days annually when the nighttime low temperature falls below freezing, which is warmer than most places in Iowa.

In Oak Ridge, there are 0.3 days annually when the nighttime low temperature falls below zero°, which is warmer than most places in Tennessee.

In Iowa City, there are 12.2 days annually when the nighttime low temperature falls below zero°, which is warmer than most places in Iowa.

July is the wettest month in Oak Ridge with 5.3 inches of rain, and the driest month is October with 3.0 inches. The wettest season is Spring with 28% of yearly precipitation and 22% occurs in Winter, which is the driest season. The annual rainfall of 52.7 inches in Oak Ridge means that it is drier than most places in Tennessee.


July is the wettest month in Iowa City 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 Iowa City means that it is wetter than most places in Iowa.

July is the rainiest month in Oak Ridge with 12.3 days of rain, and September is the driest month with only 8.2 rainy days. There are 124.8 rainy days annually in Oak Ridge, which is rainier than most places in Tennessee. The rainiest season is Summer when it rains 27% of the time and the driest is Winter with only a 21% chance of a rainy day.

May is the rainiest month in Iowa City with 11.2 days of rain, and February is the driest month with only 5.5 rainy days. There are 98.0 rainy days annually in Iowa City, 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.

An annual snowfall of 6.2 inches in Oak Ridge means that it is snowier than most places in Tennessee.

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

January is the snowiest month in Oak Ridge with 2.5 inches of snow, and 4 months of the year have significant snowfall.

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