Chicago
Illinois, USA
Long-term weather forecast
Long-term weather forecast
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March weather forecast and Climate
Chicago, IL

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An aerial view of the city of Chicago in Illinois, on the shores of Lake Michigan, with a superb view of the sandy beach of Oak Street
An aerial view of the city of Chicago in Illinois, on the shores of Lake Michigan, with a superb view of the sandy beach of Oak Street
March is windier in Chicago at the beginning of spring, but the temperatures are warmer than winter. Most days register above 40°F (4.4°C), while a few ranges between 50°F (10°C) to 60°F (15.6°C). Few nights drop to 20°F (-6.7°C), but most are around 32°F (0°C).
March sees a daily average of 11.5 hours of sunshine, but the skies are mostly cloudy. Snowfall is to the tune of 5.6" (142.2mm), while the wetness quotient increases with 2.5" (63.5mm) of rain.
Early spring is breezy and wet but draws budget visitors to Chicago for off-season discounts - dress in layers as the weather may throw a surprise!
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  • The average high temperature in March: 46.8°F

The warmest month (with the highest average high temperature) is July (84.2°F).
The month with the lowest average high temperature is January (31.5°F).

  • The average low temperature in March: 30.9°F

The month with the highest average low temperature is July (67.5°F).
The coldest month (with the lowest average low temperature) is January (18.2°F).

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  • The average humidity in March: 69.7%

The month with the highest relative humidity is December (75.5%).
The month with the lowest relative humidity is May (64.1%).

  • The average rainfall in March: 2.7"

Wettest months (with the highest rainfall) are May and June (4.1").
The driest month (with the lowest rainfall) is February (1.9").

  • The average rainfall days in March: 11.2 days

The month with the highest number of rainy days is May (11.4 days).
The month with the lowest number of rainy days is September (8.2 days).

  • The average snowfall in March: 5.4"

The month with the highest snowfall is January (11.5").
Months with the lowest snowfall are May, June, July, August and September (0").

  • The average snowfall days in March: 3.8 days

The month with the highest number of snowfall days is January (8.1 days).
Months with the lowest number of snowfall days are May, June, July, August and September (0 days).

  • The average sea temperature in March: 37.8°F

The best month for swimming (with the highest average sea temperature) is August (73.9°F).
The coldest month (with the lowest average sea temperature) is February (36.9°F).

  • The average daylight in March: 12h

Months with the longest days are May, June and July (Average daylight: 15h).
The month with shortest days is December (Average daylight: 9h).

  • The average sunshine in March: 6h

The month with most sunshine is June (Average sunshine: 10.4h).
The month with least sunshine is December (Average sunshine: 3.4h).

  • The average UV index in March: 4

Months with the highest UV index are June and July (UV index 9).
Months with the lowest UV index are January and December (UV index 1).

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