October Rainfall and Precipitation in Illinois
Average rainfall, rainy days and the driest cities in Illinois, the United States of America in October.
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Best Places to Visit in Illinois in October
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Monthly precipitation
0 mm (0 in) dry → 150 mm (5.9 in) wet
Marker color shows total monthly precipitation in October: pale blue is dry, deep blue is wet.
Illinois precipitation in October: frequently asked questions
How much rainfall does Illinois, the United States of America receive in October?
Chicago sees moderate rainfall in October, averaging around 76 mm (3 in). Most days stay dry, with the occasional shower.
How many days does it rain in Illinois, the United States of America in October?
Chicago sees roughly 12 days rainy days during October.
Is October part of the rainy season in Illinois, the United States of America?
October is generally a drier month for Illinois, the United States of America, falling outside the main rainy season.
What is the wettest city in October in Illinois, the United States of America?
Looking at our data, Roscoe tops the wettest-cities list in Illinois, the United States of America for October, with monthly rainfall averaging 143 mm (5.6 in).
What is the driest city in October in Illinois, the United States of America?
Rochelle is the driest city we have data for in Illinois, the United States of America in October, with monthly rainfall close to 67 mm (2.6 in).
Interested in more climate information?
We have much more information about the climate in Illinois.
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