Decatur weather in January 2025

Expect 1°C daytime maximum temperatures in the shade with on average 5 hours of sunshine per day in Decatur in January. Check more long-term weather averages for Decatur in January before you book your next holiday to Illinois in 2025/2026.

  • 1°C maximum daytime temperature in January in Decatur1
    1°C max day temperature
  • 5 hours of sunshine per day
  • 10 days with some rainfall in January in Decatur10
    10 days with some rainfall
  • -9°C minimum night-time temperature in January in Decatur-9
    -9°C min night temperature
  • 10 hours of daylight per day in January in Decatur10
    10 hours of daylight per day
  • No heat & humidity in January in Decatur0
    No heat & humidity
  • 49 mm monthly rainfall in January in Decatur49
    49 mm of monthly rainfall
  • UV (maximum) index 2 (Low) in January in Decatur2
    2 (Low) UV index

More about Decatur

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The January 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 / mm)  |  Imperial (°F / inches)

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More about the USA

How cold is it in Decatur in January?

Daytime temperatures usually reach 1°C in Decatur in January, falling to -9°C at night.

How sunny is it in Decatur in January?

There are normally 5 hours of bright sunshine each day in Decatur in January - that's 50% of daylight hours.

Does it rain in Decatur in January?

There are usually 10 days with some rain in Decatur in January and the average monthly rainfall is 49mm. Rain may fall as snow in this month.

Decatur January sunrise & sunset times

Browse the sunrise and sunset times for Decatur in January 2025. Select a month to view Decatur sunrise and sunset times for the next 12 months.

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Wednesday, 1st January 2025 07:17 16:42
Thursday, 16th January 2025 07:15 16:57
Friday, 31st January 2025 07:04 17:15

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