2025 Compare Climate & Weather:
Allentown, PA vs Rochester Hills, MI

Highlights

On average, there are 179 sunny days per year in Rochester Hills. Allentown averages 201 sunny days per year. The US average is 205 sunny days.

Rochester Hills, Michigan gets 32 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.

Rochester Hills averages 33.1 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

Rochester Hills, Michigan
Summer High: the July high is around 82.3 degrees
Winter Low: the January low is 15.7
Rain: averages 32 inches of rain a year
Snow: averages 33.1 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 Rochester Hills is 6.8 (10=best), which means it is one of the most pleasant places in Michigan.

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

66°F

Today's Weather - Rochester Hills, MI

70°F

Average Monthly High / Low (°F)

Hot, Freezing, Rainy, Snowy Days: Allentown / Rochester Hills

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 Rochester Hills with an average high temperature of 82.3°, which ranks it as warmer than most places in Michigan. In Rochester Hills, there are 4 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for Rochester Hills are June, August and July.

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 Rochester Hills with an average of 15.7°. This is about average compared to other places in Michigan.

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 Rochester Hills, there are 5.5 days annually when the high temperature is over 90°, which is about average compared to other places in Michigan.

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 Rochester Hills, there are 141.6 days annually when the nighttime low temperature falls below freezing, which is about average compared to other places in Michigan.

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 Rochester Hills, there are 5.5 days annually when the nighttime low temperature falls below zero°, which is warmer than most places in Michigan.

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.


June is the wettest month in Rochester Hills with 3.4 inches of rain, and the driest month is January with 1.7 inches. The wettest season is Autumn with 29% of yearly precipitation and 17% occurs in Spring, which is the driest season. The annual rainfall of 32.0 inches in Rochester Hills means that it is drier than most places in Michigan.

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.

December is the rainiest month in Rochester Hills with 11.8 days of rain, and February is the driest month with only 9.2 rainy days. There are 123.4 rainy days annually in Rochester Hills, which is less rainy than most places in Michigan. The rainiest season is Spring when it rains 26% of the time and the driest is Autumn 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 33.1 inches in Rochester Hills means that it is one of the least snowy places in Michigan.

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

January is the snowiest month in Rochester Hills with 9.8 inches of snow, and 6 months of the year have significant snowfall.