Rock Island, Illinois 

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Climate in Rock Island, Illinois

Rock Island, Illinois gets 37 inches of rain, on average, per year. The US average is 38 inches of rain per year.

Rock Island averages 28 inches of snow per year. The US average is 28 inches of snow per year.

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

Rock Island gets some kind of precipitation, on average, 115 days per year. Precipitation is rain, snow, sleet, or hail that falls to the ground. In order for precipitation to be counted you have to get at least .01 inches on the ground to measure.


Weather Highlights

Summer High: the July high is around 85 degrees
Winter Low: the January low is 15
Rain: averages 37 inches of rain a year
Snow: averages 28 inches of snow a year


BESTPLACES COMFORT INDEX

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.

Climate Averages
  Rock Island, IllinoisUnited States
  37.0 in.38.1 in.
  28.2 in.27.8 in.
  115.3 days106.2 days
  198 days205 days
  84.7°85.8°
  14.5°21.7°
  6.97
  3.74.3
  561 ft.2443 ft.
CLIMATE

YOU SHOULD KNOW

Many people confuse weather and climate but they are different. Weather is the conditions of the atmosphere over a short period of time, and climate is how the atmosphere is over long periods of time.

Weather is how the atmosphere is behaving and its effects upon life and human activities. Weather can change from minute-to-minute. Most people think of weather in terms of temperature, humidity, precipitation, cloudiness, brightness, visibility, wind, and atmospheric pressure.

Climate is the description of the long-term pattern of weather in a place. Climate can mean the average weather for a particular region and time period taken over 30 years. Climate is the average of weather over time.


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.


January has the coldest nighttime temperatures for Rock Island with an average of 14.5°. 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 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 Rock Island, there are 10.0 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 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.


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





CLIMATE MAP
  • Annual Rainfall (US Avg: 36.5")
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    Reviews for Rock Island    3 Reviews
    Rock Island - Pros/Cons - 2/10/2008
    Pros: 1. Extremely low cost of living 2. Affordable place to live Cons: 1. High crime rate 2. Poor school system 3. Not much to... Read More

    Start Your Review of Rock Island


    QCA Education and Business - 5/17/2007
    Rock Island has a varied background and contains many cultural and historic areas. It has been improving its school system and is in a metropolitan area which contains... Read More

    Affordable Small City - 12/2/2006
    I just moved here for work one year ago. Moving from San Francisco here was a shock but ultimatelly good. The community is a typical midwestern small town. It is part... Read More


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    ZIP CODES IN ROCK ISLAND, ILLINOIS
    61201

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