2025 Compare Climate & Weather:
Allentown, PA vs Bethlehem, PA

Highlights

On average, there are 202 sunny days per year in Bethlehem. Allentown averages 201 sunny days per year. The US average is 205 sunny days.

Bethlehem, Pennsylvania gets 48 inches of rain, on average, per year. Allentown, Pennsylvania gets 46.6 inches of rain, on average, per year. The US average is 38.1 inches of rain per year.

Bethlehem averages 30.4 inches of snow per year. Allentown averages 29.2 inches of snow per year. The US average is 27.8 inches of snow per year.

Weather Highlights

Bethlehem, Pennsylvania
Summer High: the July high is around 84.3 degrees
Winter Low: the January low is 18.5
Rain: averages 48 inches of rain a year
Snow: averages 30.4 inches of snow a year

Allentown, Pennsylvania
Summer High: the July high is around 85.9 degrees
Winter Low: the January low is 19.8
Rain: averages 46.6 inches of rain a year
Snow: averages 29.2 inches of snow a year

BestPlaces Comfort Index

The annual BestPlaces Comfort Index for Bethlehem is 7.1 (10=best), which means it is more comfortable than most places in Pennsylvania.

The annual BestPlaces Comfort Index for Allentown is 7.1 (10=best), which means it is more comfortable than most places in Pennsylvania.

Today's Weather - Allentown, PA

76°F

Today's Weather - Bethlehem, PA

76°F

Average Monthly High / Low (°F)

Hot, Freezing, Rainy, Snowy Days: Allentown / Bethlehem

July is the hottest month for Allentown with an average high temperature of 85.9°, which ranks it as one of the hottest places in Pennsylvania. In Allentown, there are 4 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for Allentown are September, June and May.

July is the hottest month for Bethlehem with an average high temperature of 84.3°, which ranks it as warmer than most places in Pennsylvania. In Bethlehem, there are 5 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for Bethlehem are June, September and August.

January has the coldest nighttime temperatures for Allentown with an average of 19.8°. This is about average compared to other places in Pennsylvania.

January has the coldest nighttime temperatures for Bethlehem with an average of 18.5°. This is about average compared to other places in Pennsylvania.

In Allentown, there are 22.0 days annually when the high temperature is over 90°, which is one of the hottest places in Pennsylvania.

In Bethlehem, there are 12.2 days annually when the high temperature is over 90°, which is hotter than most places in Pennsylvania.

In Allentown, there are 121.8 days annually when the nighttime low temperature falls below freezing, which is warmer than most places in Pennsylvania.

In Bethlehem, there are 130.9 days annually when the nighttime low temperature falls below freezing, which is about average compared to other places in Pennsylvania.

In Allentown, there are 1.9 days annually when the nighttime low temperature falls below zero°, which is about average compared to other places in Pennsylvania.

In Bethlehem, there are 2.0 days annually when the nighttime low temperature falls below zero°, which is about average compared to other places in Pennsylvania.

July is the wettest month in Allentown with 4.9 inches of rain, and the driest month is February with 2.8 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 46.6 inches in Allentown means that it is wetter than most places in Pennsylvania.


July is the wettest month in Bethlehem with 5.1 inches of rain, and the driest month is February with 2.9 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 48.0 inches in Bethlehem means that it is one of the wettest places in Pennsylvania.

May is the rainiest month in Allentown with 12.1 days of rain, and September is the driest month with only 8.9 rainy days. There are 122.0 rainy days annually in Allentown, 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 Bethlehem with 11.7 days of rain, and February is the driest month with only 8.7 rainy days. There are 119.6 rainy days annually in Bethlehem, which is less rainy than most places in Pennsylvania. The rainiest season is Summer when it rains 27% of the time and the driest is Winter with only a 23% chance of a rainy day.

An annual snowfall of 29.2 inches in Allentown means that it is about average compared to other places in Pennsylvania.

An annual snowfall of 30.4 inches in Bethlehem means that it is about average compared to other places in Pennsylvania.

February is the snowiest month in Allentown with 9.8 inches of snow, and 6 months of the year have significant snowfall.

February is the snowiest month in Bethlehem with 10.3 inches of snow, and 6 months of the year have significant snowfall.