Weather Guide

Chicago, Illinois, United States Average Monthly Weather

Weather score42Mixed annual avg

Best months: July, August, June

Across the year, average daytime temperatures are around 15°C, sunshine averages 6.8h per day, and rainfall totals about 939mm. Sea temperatures average 11°C across the year.

Chicago, Illinois, United States, United States travel weather guide
Photo by 12019 on Pixabay

Annual weather

Annual averages

Temp

15°C

Rain

939mm

Annual total

Sun

6.8h

Sea

11°C

Weather score

42

Mixed avg

Seasonal climate calendar

Trip feel

Cool

Average highs are around 9°C, so pack for cooler days.

Drier

Rainfall averages 71mm, which is relatively low for holiday planning.

Limited sun

Sunshine averages 3.7h per day, so this is not one of the brighter months.

Cool sea

Sea temperatures average 9°C, so the water can feel cool.

Map

Weather map

Compare Chicago, Illinois, United States with nearby places by weather score, rain, sun, temperature, and swim conditions.

Temperature

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November9°C average high

November is on the cooler side of Chicago's year, useful if you prefer less intense daytime heat.

Warmest monthsMay to September

This stretch sets the upper range for average daytime heat.

November71mm average rain

November sits near Chicago's yearly rainfall average, so rain is a normal planning factor rather than an outlier.

Driest monthsJanuary to February and October

This is the drier part of the year, when outdoor plans usually need less weather flexibility.

November3.7 hours average sun

November is one of Chicago's cloudier months, so sunshine-led plans are less reliable.

Brightest monthsMay to August

This stretch has the strongest sunshine in the monthly averages.

Sea temperature

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November9°C average sea

November is below Chicago's yearly sea-temperature average, so swimming can feel fresher.

Warmest seaJuly to September

Sea temperatures are usually near 21°C in this stretch, so swimming comfort is at its strongest.

Weather score

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November24 weather score

November is one of the weakest weather-score months, when the overall mix is less favourable than the rest of the year.

Best weather monthsJune to August

These months have the strongest weather score in the monthly averages.

Hotels in Chicago, Illinois, United States