Weather & Climate at Rock Island Arsenal Army Base in Arsenal Island, IL

Summary of the weather and climate in Arsenal Island, IL:

  • The average high in Arsenal Island, IL is 60.6°F and average low is 40.7°F
  • The hottest month is July with an high of 85.8°F
  • The coldest month is January with an low of 14.3°F
  • Annual rainfall is 37.96 inches. The rainiest month is August with an average of 4.52 inches.
  • Annual snowfall is 31.6 inches. The snowiest month is January with an average of 9.4 inches.

SOURCE: NOAA.GOV

Climate Table — Rock Island Arsenal Army Base

Monthly Averages:

High (°F)Low (°F)Rainfall (inches)Snowfall (inches)
January 31 14.3 1.49 9.4
February 35.7 18.3 1.6 6.8
March 48.8 29.4 2.86 4
April 62.3 40.5 3.59 0.9
May 72.9 50.7 4.32 0
June 82.3 60.7 4.49 0
July 85.8 65 4.29 0
August 83.8 63.2 4.52 0
September 76.8 53.9 3.09 0
October 64.1 42.4 2.97 0
November 49.2 30.9 2.56 1.2
December 34.6 18.6 2.18 9.3

Climate Charts — Rock Island Arsenal Army Base

Weather through the year:



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** Document Provided By MilBases.com **
Source: https://www.milbases.com/illinois/rock-island-arsenal-army-base/weather