Illinois weather in March 2025

Expect 46°F daytime maximum temperatures in the shade with on average 6 hours of sunshine per day in Illinois in March. Check more long-term weather averages for Illinois in March before you book your next holiday to Illinois in 2025/2026.

  • 46°F maximum daytime temperature in March in Illinois (Chicago)46
    46°F max day temperature
  • 6 hours of sunshine per day
  • 13 days with some rainfall in March in Illinois (Chicago)13
    13 days with some rainfall
  • 28°F minimum night-time temperature in March in Illinois (Chicago)28
    28°F min night temperature
  • 12 hours of daylight per day in March in Illinois (Chicago)12
    12 hours of daylight per day
  • No heat & humidity in March in Illinois (Chicago)0
    No heat & humidity
  • 2.6 inches monthly rainfall in March in Illinois (Chicago)2.6
    2.6 inches of monthly rainfall
  • UV (maximum) index 4 (Moderate) in March in Illinois (Chicago)4
    4 (Moderate) UV index
  • 37°F sea temperature in March in Illinois (Chicago)37
    37°F sea temperature

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The March weather guide for Illinois (Chicago) shows long term weather averages processed from data supplied by CRU (University of East Anglia), the Met Office & the Netherlands Meteorological Institute. Find out more about our data sources.

Top Illinois destinations

Below are average maximum temperatures at popular countries, regions and places in Illinois in March. Select a holiday destination to see more weather parameters.

All Illinois destinations

Metric (°C)  |  Imperial (°F)

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How warm is it in Illinois in March?

Daytime temperatures usually reach 46°F in Chicago, Illinois in March, falling to 28°F at night.

How sunny is it in Illinois in March?

There are normally 6 hours of bright sunshine each day in Chicago, Illinois in March - that's 50% of daylight hours.

How warm is the sea around Illinois in March?

The average sea temperature around Chicago, Illinois in March is 37°F.

Does it rain in Illinois in March?

There are usually 13 days with some rain in Chicago, Illinois in March and the average monthly rainfall is 2.6 inches.

Illinois March sunrise & sunset times

Browse the sunrise and sunset times for Illinois in March 2025. Select a month to view Illinois sunrise and sunset times for the next 12 months. The Illinois sunrise and sunset times shown below are for Chicago.

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Saturday, 1st March 2025 06:25 17:41
Sunday, 16th March 2025 06:00 17:59
Monday, 31st March 2025 05:34 18:15

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