Chicago Weather in March

March lacks the most bitter cold weather of winter, but it does get windier now in Chicago, Illinois.

This page gives detailed information on the typical March temperature, precipitation, sun, humidity, wind and storms for Chicago. The numbers here are historical averages based on temperature, rain and snow measurements gathered at Chicago Midway Airport and other climate data from Chicago O'Hare International Airport.

Temperature Weather iconTemperature

48 °F March average high 9 °C
32 °F March average low 0 °C
12 days 50 °F max. or more (10 °C)
18 days 32 °F min. or less (0 °C)

The temperature rises most days in March to over 40 degrees Fahrenheit (4 degrees Celsius) in Chicago. The city averages 6 days this month when the thermometer reaches into the 60s °F (over 15 °C). Temperatures above 80 °F (26 °C) in March occur about once every few years. Typically 3 days remain below freezing for the entire day.

The thermometer dips to 20 °F (-8 °C) or below on 4 nights. But only in some years does March get as cold as 10 °F (-12 °C).

Rainy Weather iconPrecipitation

2.7 in total precipitation 68 mm
11 days of rain or snowfall

Half the time, Chicago receives 1.8 to 3.3 inches (44 to 84 mm) of precipitation in March. One in four years has drier weather, while another one in four is wetter.

Snowy Weather iconSnow

5.5 in total snowfall 14 cm
4 days with new snow

March's snowfall varies a lot from year to year in Chicago. Between 2 and 8 inches (5 to 20 cm) of fresh snow arrives in half the years. Less new snow lands in one out of four Marches, while another twenty-five percent are snowier.

Chicago typically has at least an inch (2.5 cm) of snow on the ground for 5 days this month. The snow normally accumulates to 5 inches (13 cm) or deeper on 2 days.

Sunny Weather iconSun

51 % sunshine
5 days clear skies

The sun's rays reach the ground in Chicago during 51 percent of daylight hours on average in March, for a total of 189 hours in the month. Typically on 5 days this month the sky is mainly clear, with at most 30 percent cloud cover.

Sunlight in March at Chicago lasts for 11 hours and 58 minutes a day on average. The shortest day of the month is the 1st with 11 hours and 16 minutes of daylight. By the end of the month, the days have lengthened to 12:41 from sunrise to sunset. These durations can vary by a minute or two from year to year.

Humid Weather iconHumidity

70 % March average humidity

The relative humidity in Chicago during March usually peaks at 79 percent in the morning then drops to 59 percent by mid afternoon.

Local Time12 am3 am6 am9 am12 pm3 pm6 pm9 pm
Humidity % 76 78 79 70 61 59 64 72

Windy Weather iconWind

11.8 mph March wind speed average 19.0 kph

March is much windier than most other months in Chicago.

Stormy Weather iconStorms

2 days snowfall of 1 inch (2.5 cm) or more
2 days with thunderstorms in March

A March snowstorm that leaves 5 inches (13 cm) or more in one day descends on Chicago about once a decade.


The weather data here are long-term averages provided by the US National Centers for Environmental Information (NCEI). Temperature and precipitation are 1991-2020 normals while humidity and thunderstorms are 1961-1990 normals.

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