The remote server returned an error: (400) Bad Request.The remote server returned an error: (400) Bad Request. 2025 Compare Climate & Weather: Buffalo Grove, IL vs Coatesville, PA

2025 Compare Climate & Weather:
Buffalo Grove, IL vs Coatesville, PA

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Highlights

On average, there are 205 sunny days per year in Coatesville. Buffalo Grove averages 187 sunny days per year. The US average is 205 sunny days.

Coatesville, Pennsylvania gets 49 inches of rain, on average, per year. Buffalo Grove, Illinois gets 36.2 inches of rain, on average, per year. The US average is 38.1 inches of rain per year.

Coatesville averages 28.7 inches of snow per year. Buffalo Grove averages 36 inches of snow per year. The US average is 27.8 inches of snow per year.

Weather Highlights

Coatesville, Pennsylvania
Summer High: the July high is around 84.8 degrees
Winter Low: the January low is 20.5
Rain: averages 49 inches of rain a year
Snow: averages 28.7 inches of snow a year

Buffalo Grove, Illinois
Summer High: the July high is around 83 degrees
Winter Low: the January low is 16.7
Rain: averages 36.2 inches of rain a year
Snow: averages 36 inches of snow a year

BestPlaces Comfort Index
Coatesville

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

7.1 / 10
June, September and August are the most pleasant months in Coatesville, while January and February are the least comfortable months.

Buffalo Grove

The annual BestPlaces Comfort Index for Buffalo Grove is 6.9 (10=best), which means it is less comfortable than most places in Illinois.

6.9 / 10
June, September and August are the most pleasant months in Buffalo Grove, while January and December are the least comfortable months.

Average Monthly High / Low (°F)
MonthBuffalo Grove, ILCoatesville, PA
January32° / 17°38° / 21°
February36° / 20°41° / 22°
March46° / 29°51° / 30°
April58° / 38°62° / 39°
May69° / 48°72° / 49°
June79° / 58°81° / 59°
July83° / 64°85° / 63°
August82° / 63°83° / 62°
September75° / 55°76° / 54°
October62° / 43°65° / 42°
November49° / 33°54° / 33°
December36° / 21°43° / 25°
Hot, Freezing, Rainy, Snowy Days: Buffalo Grove / Coatesville
MonthHot DaysFreezing DaysRainy DaysSnowy Days
January0 / 028 / 2810 / 117 / 5
February0 / 024 / 258 / 105 / 4
March0 / 021 / 1911 / 114 / 2
April0 / 07 / 612 / 121 / 1
May1 / 10 / 012 / 120 / 0
June3 / 30 / 010 / 110 / 0
July5 / 60 / 010 / 110 / 0
August4 / 30 / 010 / 100 / 0
September1 / 10 / 010 / 90 / 0
October0 / 03 / 410 / 90 / 0
November0 / 014 / 1411 / 102 / 1
December0 / 026 / 2511 / 116 / 3
July is the hottest month for Buffalo Grove with an average high temperature of 83.0°, which ranks it as one of the coolest places in Illinois. In Buffalo Grove, there are 4 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for Buffalo Grove are June, September and August.

July is the hottest month for Coatesville with an average high temperature of 84.8°, which ranks it as warmer than most places in Pennsylvania. In Coatesville, there are 5 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for Coatesville are September, June and August.
January has the coldest nighttime temperatures for Buffalo Grove with an average of 16.7°. This is about average compared to other places in Illinois.

January has the coldest nighttime temperatures for Coatesville with an average of 20.5°. This is warmer than most places in Pennsylvania.

In Buffalo Grove, there are 13.8 days annually when the high temperature is over 90°, which is cooler than most places in Illinois.

In Coatesville, there are 12.5 days annually when the high temperature is over 90°, which is hotter than most places in Pennsylvania.

In Buffalo Grove, there are 122.7 days annually when the nighttime low temperature falls below freezing, which is about average compared to other places in Illinois.

In Coatesville, there are 120.1 days annually when the nighttime low temperature falls below freezing, which is warmer than most places in Pennsylvania.

In Buffalo Grove, there are 6.2 days annually when the nighttime low temperature falls below zero°, which is about average compared to other places in Illinois.

In Coatesville, there are 0.9 days annually when the nighttime low temperature falls below zero°, which is warmer than most places in Pennsylvania.

August is the wettest month in Buffalo Grove with 4.3 inches of rain, and the driest month is February with 1.6 inches. The wettest season is Autumn with 32% of yearly precipitation and 15% occurs in Spring, which is the driest season. The annual rainfall of 36.2 inches in Buffalo Grove means that it is one of the driest places in Illinois.


September is the wettest month in Coatesville with 4.8 inches of rain, and the driest month is February with 3.3 inches. The wettest season is Winter with 26% of yearly precipitation and 22% occurs in Spring, which is the driest season. The annual rainfall of 49.0 inches in Coatesville means that it is one of the wettest places in Pennsylvania.

April is the rainiest month in Buffalo Grove with 12.2 days of rain, and February is the driest month with only 8.3 rainy days. There are 125.2 rainy days annually in Buffalo Grove, which is one of the rainiest places in Illinois. The rainiest season is Summer when it rains 28% of the time and the driest is Spring with only a 23% chance of a rainy day.

April is the rainiest month in Coatesville with 12.0 days of rain, and September is the driest month with only 8.9 rainy days. There are 125.3 rainy days annually in Coatesville, 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.

An annual snowfall of 36.0 inches in Buffalo Grove means that it is one of the snowiest places in Illinois.

An annual snowfall of 28.7 inches in Coatesville means that it is about average compared to other places in Pennsylvania.
January is the snowiest month in Buffalo Grove with 11.3 inches of snow, and 6 months of the year have significant snowfall.

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

DID YOU KNOW?

Many people confuse Weather and Climate, but they are different. Weather refers to the conditions of the atmosphere over a short period of time, while Climate refers to the conditions of the atmosphere over a long period of time.

Weather, more specifically, refers to how the atmosphere behaves and its effects on life and human activities. Most people think of Weather in terms of what can be observed: temperature, humidity, precipitation, and cloudy/sunny conditions. Weather conditions constantly change on a minute-to-minute basis.

Climate is a record of the average weather conditions for a given place over a long period of time, often referred to as Climate Normals. A 30-year period of record is a common requirement to be considered a Climate Normal.

Reviews for Buffalo Grove    2 Reviews
Jill · Sherman Oaks, CA
re:
Over 16 years ago

Hi. I'd like to know if you still feel the same way about living in Broomfield. I went there this past July to check it out (along with Lafayette, Boulder (can't  More

   |    Reply
NC For Me · Apex, NC
re:
Over 16 years ago

Apex is perfect for what you are looking for. It's close enough to Raleigh, Durham, Chapel Hill to find a job and Cary the next town over, is a little more expensive but  More

   |    Reply

Start Your Review of Buffalo Grove

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Reviews for Coatesville    2 Reviews
Jill · Sherman Oaks, CA
re:
Over 16 years ago

Hi. I'd like to know if you still feel the same way about living in Broomfield. I went there this past July to check it out (along with Lafayette, Boulder (can't  More

   |    Reply
NC For Me · Apex, NC
re:
Over 16 years ago

Apex is perfect for what you are looking for. It's close enough to Raleigh, Durham, Chapel Hill to find a job and Cary the next town over, is a little more expensive but  More

   |    Reply

Start Your Review of Coatesville

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Zips In Buffalo Grove, Illinois
60089
Zips In COATESVILLE, PENNSYLVANIA
19320
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