The remote server returned an error: (400) Bad Request.The remote server returned an error: (400) Bad Request. 2025 Compare Climate & Weather: Rock Island, IL vs Lake Bluff, IL

2025 Compare Climate & Weather:
Rock Island, IL vs Lake Bluff, IL

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Highlights

On average, there are 190 sunny days per year in Lake Bluff. Rock Island averages 198 sunny days per year. The US average is 205 sunny days.

Lake Bluff, Illinois gets 36.1 inches of rain, on average, per year. Rock Island, Illinois gets 37 inches of rain, on average, per year. The US average is 38.1 inches of rain per year.

Lake Bluff averages 38.2 inches of snow per year. Rock Island averages 28.2 inches of snow per year. The US average is 27.8 inches of snow per year.

Weather Highlights

Lake Bluff, Illinois
Summer High:
the July high is around 81.4 degrees
Winter Low: the January low is 15.5
Rain: averages 36.1 inches of rain a year
Snow: averages 38.2 inches of snow a year

Rock Island, Illinois
Summer High:
the July high is around 84.7 degrees
Winter Low: the January low is 14.5
Rain: averages 37 inches of rain a year
Snow: averages 28.2 inches of snow a year

BestPlaces Comfort Index
Lake Bluff

The annual BestPlaces Comfort Index for Lake Bluff is 6.8 (10=best), which means it is less comfortable than most places in Illinois.

6.8 / 10
June, August and July are the most pleasant months in Lake Bluff, while January and December are the least comfortable months.

Rock Island

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

6.9 / 10
September, June and May are the most pleasant months in Rock Island, while January and December are the least comfortable months.

Average Monthly High / Low (°F)
MonthRock Island, ILLake Bluff, IL
January31° / 15°31° / 16°
February36° / 19°34° / 19°
March49° / 30°44° / 28°
April62° / 41°56° / 38°
May73° / 51°67° / 47°
June82° / 61°77° / 57°
July85° / 65°81° / 63°
August83° / 63°80° / 62°
September76° / 54°73° / 54°
October64° / 43°61° / 42°
November49° / 31°48° / 32°
December34° / 19°35° / 20°
Hot, Freezing, Rainy, Snowy Days: Rock Island / Lake Bluff
MonthHot DaysFreezing DaysRainy DaysSnowy Days
January0 / 029 / 299 / 105 / 7
February0 / 025 / 258 / 84 / 6
March0 / 019 / 2210 / 102 / 4
April0 / 05 / 811 / 121 / 1
May1 / 10 / 112 / 120 / 0
June3 / 20 / 011 / 110 / 0
July6 / 40 / 09 / 100 / 0
August4 / 30 / 010 / 100 / 0
September1 / 10 / 08 / 100 / 0
October0 / 04 / 49 / 100 / 0
November0 / 016 / 1510 / 111 / 2
December0 / 027 / 2610 / 105 / 7
July is the hottest month for Rock Island with an average high temperature of 84.7°, which ranks it as cooler than most places in Illinois. In Rock Island, there are 5 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for Rock Island are September, June and August.

July is the hottest month for Lake Bluff with an average high temperature of 81.4°, which ranks it as one of the coolest places in Illinois. In Lake Bluff, there are 4 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for Lake Bluff are June, August and July.
January has the coldest nighttime temperatures for Rock Island with an average of 14.5°. This is colder than most places in Illinois.

January has the coldest nighttime temperatures for Lake Bluff with an average of 15.5°. This is colder than most places in Illinois.

In Rock Island, there are 14.9 days annually when the high temperature is over 90°, which is cooler than most places in Illinois.

In Lake Bluff, there are 9.6 days annually when the high temperature is over 90°, which is one of the coolest places in Illinois.

In Rock Island, there are 124.5 days annually when the nighttime low temperature falls below freezing, which is about average compared to other places in Illinois.

In Lake Bluff, there are 128.5 days annually when the nighttime low temperature falls below freezing, which is colder than most places in Illinois.

In Rock Island, there are 10.0 days annually when the nighttime low temperature falls below zero°, which is colder than most places in Illinois.

In Lake Bluff, there are 7.5 days annually when the nighttime low temperature falls below zero°, which is colder than most places in Illinois.

June is the wettest month in Rock Island with 4.6 inches of rain, and the driest month is January with 1.3 inches. The wettest season is Autumn with 36% of yearly precipitation and 13% occurs in Spring, which is the driest season. The annual rainfall of 37.0 inches in Rock Island means that it is drier than most places in Illinois.


May is the wettest month in Lake Bluff with 4.0 inches of rain, and the driest month is January with 1.7 inches. The wettest season is Autumn with 31% of yearly precipitation and 16% occurs in Spring, which is the driest season. The annual rainfall of 36.1 inches in Lake Bluff means that it is one of the driest places in Illinois.

May is the rainiest month in Rock Island with 11.7 days of rain, and September is the driest month with only 8.0 rainy days. There are 115.3 rainy days annually in Rock Island, which is rainier than most 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.

May is the rainiest month in Lake Bluff with 11.8 days of rain, and February is the driest month with only 7.5 rainy days. There are 120.1 rainy days annually in Lake Bluff, which is rainier than most 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.

An annual snowfall of 28.2 inches in Rock Island means that it is snowier than most places in Illinois.

An annual snowfall of 38.2 inches in Lake Bluff means that it is one of the snowiest places in Illinois.
January is the snowiest month in Rock Island with 8.5 inches of snow, and 6 months of the year have significant snowfall.

January is the snowiest month in Lake Bluff with 11.3 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 Rock Island    2 Reviews

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

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 Rock Island

Reviews for Lake Bluff    2 Reviews

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

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 Lake Bluff

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