2025 Compare Climate & Weather:
Harrisburg, PA vs Frederick, MD

Highlights

On average, there are 200 sunny days per year in Frederick. Harrisburg averages 193 sunny days per year. The US average is 205 sunny days.

Frederick, Maryland gets 42.5 inches of rain, on average, per year. Harrisburg, Pennsylvania gets 41.8 inches of rain, on average, per year. The US average is 38.1 inches of rain per year.

Frederick averages 23.1 inches of snow per year. Harrisburg averages 25.8 inches of snow per year. The US average is 27.8 inches of snow per year.

Weather Highlights

Frederick, Maryland
Summer High: the July high is around 87.7 degrees
Winter Low: the January low is 23.3
Rain: averages 42.5 inches of rain a year
Snow: averages 23.1 inches of snow a year

Harrisburg, Pennsylvania
Summer High: the July high is around 85.1 degrees
Winter Low: the January low is 22.4
Rain: averages 41.8 inches of rain a year
Snow: averages 25.8 inches of snow a year

BestPlaces Comfort Index

The annual BestPlaces Comfort Index for Frederick is 7.3 (10=best), which means it is more comfortable than most places in Maryland.

The annual BestPlaces Comfort Index for Harrisburg is 7.2 (10=best), which means it is one of the most pleasant places in Pennsylvania.

Today's Weather - Harrisburg, PA

69°F

Today's Weather - Frederick, MD

66°F

Average Monthly High / Low (°F)

Hot, Freezing, Rainy, Snowy Days: Harrisburg / Frederick

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

July is the hottest month for Frederick with an average high temperature of 87.7°, which ranks it as warmer than most places in Maryland. In Frederick, there are 3 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for Frederick are September, May and June.

January has the coldest nighttime temperatures for Harrisburg with an average of 22.4°. This is one of the warmest places in Pennsylvania.

January has the coldest nighttime temperatures for Frederick with an average of 23.3°. This is colder than most places in Maryland.

In Harrisburg, there are 13.8 days annually when the high temperature is over 90°, which is hotter than most places in Pennsylvania.

In Frederick, there are 26.3 days annually when the high temperature is over 90°, which is hotter than most places in Maryland.

In Harrisburg, there are 105.1 days annually when the nighttime low temperature falls below freezing, which is one of the warmest places in Pennsylvania.

In Frederick, there are 100.8 days annually when the nighttime low temperature falls below freezing, which is colder than most places in Maryland.

In Harrisburg, there are 0.5 days annually when the nighttime low temperature falls below zero°, which is one of the warmest places in Pennsylvania.

In Frederick, there are 0.8 days annually when the nighttime low temperature falls below zero°, which is colder than most places in Maryland.

July is the wettest month in Harrisburg with 4.2 inches of rain, and the driest month is February with 2.7 inches. The wettest season is Autumn with 28% of yearly precipitation and 21% occurs in Spring, which is the driest season. The annual rainfall of 41.8 inches in Harrisburg means that it is drier than most places in Pennsylvania.


May is the wettest month in Frederick with 4.2 inches of rain, and the driest month is February with 2.8 inches. The wettest season is Summer with 27% of yearly precipitation and 21% occurs in Spring, which is the driest season. The annual rainfall of 42.5 inches in Frederick means that it is drier than most places in Maryland.

May is the rainiest month in Harrisburg with 12.6 days of rain, and September is the driest month with only 8.9 rainy days. There are 122.4 rainy days annually in Harrisburg, 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 23% chance of a rainy day.

May is the rainiest month in Frederick with 11.3 days of rain, and October is the driest month with only 7.5 rainy days. There are 107.2 rainy days annually in Frederick, which is less rainy than most places in Maryland. The rainiest season is Summer when it rains 29% of the time and the driest is Spring with only a 23% chance of a rainy day.

An annual snowfall of 25.8 inches in Harrisburg means that it is less snowy than most places in Pennsylvania.

An annual snowfall of 23.1 inches in Frederick means that it is snowier than most places in Maryland.

February is the snowiest month in Harrisburg with 8.3 inches of snow, and 6 months of the year have significant snowfall.

January is the snowiest month in Frederick with 8.6 inches of snow, and 6 months of the year have significant snowfall.