March weather forecast and climate
Chicago, IL

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!

What is the temperature in March in Chicago?

In March, the average high-temperature is 46.8°F (8.2°C), and the average low-temperature is 30.9°F (-0.6°C).
Average temperature in March - Chicago, IL
  • 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).

  • 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).

Average humidity in March - Chicago, IL
  • 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%).

Average rainfall in March - Chicago, IL
  • 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").

Average rainfall days in March - Chicago, IL
  • 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).

Average snowfall in March - Chicago, IL
  • 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").

Average snowfall days in March - Chicago, IL
  • 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).

Average sea temperature in March - Chicago, IL
  • 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).

Average daylight in March / Average sunshine in March - Chicago, IL
  • Average daylight in March: 12h

The month with the longest days is June (Average daylight: 15.2h).
The month with shortest days is December (Average daylight: 9.2h).

  • 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).

Average UV index in March - Chicago, IL
  • 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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