2025 Compare Climate & Weather:
Philadelphia, PA vs Loudon, TN

Highlights

On average, there are 204 sunny days per year in Loudon. Philadelphia averages 207 sunny days per year. The US average is 205 sunny days.

Loudon, Tennessee gets 53.2 inches of rain, on average, per year. Philadelphia, Pennsylvania gets 47.2 inches of rain, on average, per year. The US average is 38.1 inches of rain per year.

Loudon averages 4.8 inches of snow per year. Philadelphia averages 13.1 inches of snow per year. The US average is 27.8 inches of snow per year.

Weather Highlights

Loudon, Tennessee
Summer High: the July high is around 88.5 degrees
Winter Low: the January low is 27.7
Rain: averages 53.2 inches of rain a year
Snow: averages 4.8 inches of snow a year

Philadelphia, Pennsylvania
Summer High: the July high is around 87 degrees
Winter Low: the January low is 26
Rain: averages 47.2 inches of rain a year
Snow: averages 13.1 inches of snow a year

BestPlaces Comfort Index

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

The annual BestPlaces Comfort Index for Philadelphia is 7.3 (10=best), which means it is one of the most pleasant places in Pennsylvania.

Today's Weather - Philadelphia, PA

60°F

Today's Weather - Loudon, TN

66°F

Average Monthly High / Low (°F)

Hot, Freezing, Rainy, Snowy Days: Philadelphia / Loudon

July is the hottest month for Philadelphia with an average high temperature of 87.0°, which ranks it as one of the hottest places in Pennsylvania. In Philadelphia, there are 3 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for Philadelphia are September, May and June.

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

January has the coldest nighttime temperatures for Philadelphia with an average of 26.0°. This is one of the warmest places in Pennsylvania.

January has the coldest nighttime temperatures for Loudon with an average of 27.7°. This is warmer than most places in Tennessee.

In Philadelphia, there are 25.2 days annually when the high temperature is over 90°, which is one of the hottest places in Pennsylvania.

In Loudon, there are 33.2 days annually when the high temperature is over 90°, which is about average compared to other places in Tennessee.

In Philadelphia, there are 77.5 days annually when the nighttime low temperature falls below freezing, which is one of the warmest places in Pennsylvania.

In Loudon, there are 77.2 days annually when the nighttime low temperature falls below freezing, which is warmer than most places in Tennessee.

In Philadelphia, there are 0.2 days annually when the nighttime low temperature falls below zero°, which is one of the warmest places in Pennsylvania.

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

July is the wettest month in Philadelphia with 4.7 inches of rain, and the driest month is February with 2.9 inches. The wettest season is Autumn with 28% of yearly precipitation and 22% occurs in Spring, which is the driest season. The annual rainfall of 47.2 inches in Philadelphia means that it is wetter than most places in Pennsylvania.


December is the wettest month in Loudon with 5.3 inches of rain, and the driest month is October with 2.9 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 53.2 inches in Loudon means that it is about average compared to other places in Tennessee.

April is the rainiest month in Philadelphia with 11.7 days of rain, and September is the driest month with only 8.5 rainy days. There are 118.9 rainy days annually in Philadelphia, which is less rainy than most places in Pennsylvania. The rainiest season is Summer when it rains 28% of the time and the driest is Winter with only a 22% chance of a rainy day.

July is the rainiest month in Loudon with 11.5 days of rain, and September is the driest month with only 7.7 rainy days. There are 121.5 rainy days annually in Loudon, which is rainier than most places in Tennessee. The rainiest season is Spring 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 13.1 inches in Philadelphia means that it is one of the least snowy places in Pennsylvania.

An annual snowfall of 4.8 inches in Loudon means that it is snowier than most places in Tennessee.

February is the snowiest month in Philadelphia with 4.8 inches of snow, and 4 months of the year have significant snowfall.

January is the snowiest month in Loudon with 2.1 inches of snow, and 3 months of the year have significant snowfall.