Chicago (IL) monthly weather averages

Average daytime temperature

The bar chart below shows the average monthly peak daytime temperatures at Chicago

Chicago average temperature chart (Celsius)

Chicago average temperature chart (Fahrenheit)

Average monthly temperatures in Chicago (degrees centigrade and fahrenheit)
	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
°C	-1.4	1	7.4	14.3	20.8	26.3	28.3	27.3	23.3	16.9	8.8	1.5
°F	29.5	33.8	45.4	57.8	69.4	79.3	83	81.1	74	62.4	47.8	34.6

Please note: these are the average peak daytime temperatures (usually around mid-afternoon) so do not show daytime / night highs and lows. To see the daily range of temperatures have a look at the temperature max / min chart below.

Average rainfall & rainy days

The graph below shows the average rainfall and number of rainy days per month.

Average monthly rainfall in Chicago (mm and inches)
	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
mm	44	38	68	96	84	96	100	97	87	68	72	62
inches	1.7	1.5	2.7	3.8	3.3	3.8	3.9	3.8	3.4	2.7	2.8	2.4
Rainy days	12	10	13	13	11	10	10	9	9	9	11	12

Average daily sunshine

The bar chart below shows the average daily sunshine hours in Chicago

Average daily sunshine Chicago
	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Hrs sunshine	4.8	5.4	6.5	7.8	9.7	11.1	11	9.9	8.2	6.7	4.2	3.8

Day / night temperatures

The graph below shows the daily range of temperatures for each month.

Chicago average minimum / maximum temperatures (Celsius)

Chicago average minimum / maximum temperatures (Fahrenheit)

Maximum and minimum daily temperatures in Chicago (degrees centigrade and fahrenheit)
	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Min °C	-10.2	-8	-2.1	3.4	8.8	14.2	17.2	16.5	12.4	6.1	0.2	-6.7
Max °C	-1.2	1.2	7.7	14.6	21.1	26.6	28.6	27.6	23.6	17.2	9	1.7
Min °F	13.6	17.6	28.3	38.1	47.8	57.6	63	61.6	54.3	42.9	32.4	20
Max °F	21.7	25.9	37	48.2	58.8	68.7	73.2	71.6	64.4	52.9	40.3	27.5

Sea temperature

The graph below shows the average sea temperature.

Chicago average sea temperature chart (Fahrenheit)

Average sea temperature around Chicago in degrees centigrade and fahrenheit
	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
°C	4.4	3.6	3.5	4.5	6.9	12.5	19.3	21.8	19.7	14.3	9.4	6
°F	39.9	38.5	38.4	40.1	44.4	54.6	66.7	71.3	67.5	57.7	48.9	42.9

Wind speed

The graph below shows the average wind speed.

Chicago average winspeed by month (km/h)

Average wind speed in Chicago (mph and kmh)
	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
km/h	20	19	21	21	18	16	14	14	15	17	19	19
mph	13	12	13	13	11	10	9	9	9	11	12	12

A monthly average windspeed of over 16km/h or 10mph suggests a location is fairly windy.

Relative humidity

The graph below shows the average relative humidity.

Average relative humidity in Chicago
Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
73%	73%	70%	66%	65%	67%	70%	72%	72%	70%	74%	77%

Other monthly averages

UV index Best time to go?

Beta

Current (hourly) weather 15 day forecast

Chicago weather stats

Chicago weather statistics
Hottest month:	July	28.3°C 82.9°F
Driest month:	February	38mm 1.5ins
Sunniest month:	July	11hrs
Coldest month:	January	-1.4°C 29.5°F
Wettest month:	July	100mm 3.9ins
Warmest sea:	August	21.8°C 71.2°F

Map showing location of Chicago (41.85003, -87.65005)