2025 Compare Climate & Weather:
Union, MO vs Knoxville, TN

Highlights

On average, there are 204 sunny days per year in Knoxville. Union averages 200 sunny days per year. The US average is 205 sunny days.

Knoxville, Tennessee gets 50.3 inches of rain, on average, per year. Union, Missouri gets 43.8 inches of rain, on average, per year. The US average is 38.1 inches of rain per year.

Knoxville averages 5.8 inches of snow per year. Union averages 12.6 inches of snow per year. The US average is 27.8 inches of snow per year.

Weather Highlights

Knoxville, Tennessee
Summer High: the July high is around 88.1 degrees
Winter Low: the January low is 27.9
Rain: averages 50.3 inches of rain a year
Snow: averages 5.8 inches of snow a year

Union, Missouri
Summer High: the July high is around 89 degrees
Winter Low: the January low is 21.7
Rain: averages 43.8 inches of rain a year
Snow: averages 12.6 inches of snow a year

BestPlaces Comfort Index

The annual BestPlaces Comfort Index for Knoxville is 7.4 (10=best), which means it is more comfortable than most places in Tennessee.

The annual BestPlaces Comfort Index for Union is 7.2 (10=best), which means it is more comfortable than most places in Missouri.

Today's Weather - Union, MO

67°F

Today's Weather - Knoxville, TN

62°F

Average Monthly High / Low (°F)

Hot, Freezing, Rainy, Snowy Days: Union / Knoxville

July is the hottest month for Union with an average high temperature of 89.0°, which ranks it as warmer than most places in Missouri. In Union, there are 3 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for Union are May, September and June.

July is the hottest month for Knoxville with an average high temperature of 88.1°, which ranks it as cooler than most places in Tennessee. In Knoxville, there are 4 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for Knoxville are May, September and October.

January has the coldest nighttime temperatures for Union with an average of 21.7°. This is warmer than most places in Missouri.

January has the coldest nighttime temperatures for Knoxville with an average of 27.9°. This is warmer than most places in Tennessee.

In Union, there are 38.3 days annually when the high temperature is over 90°, which is hotter than most places in Missouri.

In Knoxville, there are 29.7 days annually when the high temperature is over 90°, which is cooler than most places in Tennessee.

In Union, there are 101.1 days annually when the nighttime low temperature falls below freezing, which is warmer than most places in Missouri.

In Knoxville, there are 78.4 days annually when the nighttime low temperature falls below freezing, which is warmer than most places in Tennessee.

In Union, there are 2.7 days annually when the nighttime low temperature falls below zero°, which is about average compared to other places in Missouri.

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

May is the wettest month in Union with 4.9 inches of rain, and the driest month is February with 2.4 inches. The wettest season is Summer with 28% of yearly precipitation and 18% occurs in Spring, which is the driest season. The annual rainfall of 43.8 inches in Union means that it is about average compared to other places in Missouri.


July is the wettest month in Knoxville with 5.2 inches of rain, and the driest month is October with 2.7 inches. The wettest season is Spring with 28% of yearly precipitation and 21% occurs in Winter, which is the driest season. The annual rainfall of 50.3 inches in Knoxville means that it is drier than most places in Tennessee.

May is the rainiest month in Union with 12.1 days of rain, and February is the driest month with only 7.4 rainy days. There are 107.4 rainy days annually in Union, which is one of the rainiest places in Missouri. The rainiest season is Summer when it rains 31% of the time and the driest is Spring with only a 22% chance of a rainy day.

March is the rainiest month in Knoxville with 12.0 days of rain, and September is the driest month with only 8.1 rainy days. There are 127.3 rainy days annually in Knoxville, 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.

An annual snowfall of 12.6 inches in Union means that it is about average compared to other places in Missouri.

An annual snowfall of 5.8 inches in Knoxville means that it is snowier than most places in Tennessee.

January is the snowiest month in Union with 3.9 inches of snow, and 4 months of the year have significant snowfall.

January is the snowiest month in Knoxville with 2.4 inches of snow, and 4 months of the year have significant snowfall.