Decatur weather in March 2026

Expect daytime maximum temperatures of 52°F in Decatur, Illinois in March based on long-term weather averages. There are 6 hours of sunshine per day on average with 12 days with some rainfall and typically 3.1 inches of rainfall in the month.

  • 52°F maximum daytime temperature in March in Decatur52
    52°F max day temperature
  • 6 hours of sunshine per day
  • 12 days with some rainfall in March in Decatur12
    12 days with some rainfall
  • 30°F minimum night-time temperature in March in Decatur30
    30°F min night temperature
  • 12 hours of daylight per day in March in Decatur12
    12 hours of daylight per day
  • No heat & humidity in March in Decatur0
    No heat & humidity
  • 3.1 inches monthly rainfall in March in Decatur3.1
    3.1 inches of monthly rainfall
  • UV (maximum) index 4 (Moderate) in March in Decatur4
    4 (Moderate) UV index

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The March weather guide for Illinois (Decatur) 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.

Metric (°C)  |  Imperial (°F)

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How warm is it in Decatur in March?

Daytime temperatures usually reach 52°F in Decatur in March, falling to 30°F at night.

How sunny is it in Decatur in March?

There are normally 6 hours of bright sunshine each day in Decatur in March - that's 51% of daylight hours.

Does it rain in Decatur in March?

There are usually 12 days with some rain in Decatur in March and the average monthly rainfall is 3.1 inches.

Decatur March sunrise & sunset times

Browse the sunrise and sunset times for Decatur in March 2026. Select a month to view Decatur sunrise and sunset times for the next 12 months.

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Sunday, 1st March 2026 06:29 17:48
Monday, 16th March 2026 06:05 18:04
Tuesday, 31st March 2026 05:41 18:19

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