Marion weather in December 2025

Expect daytime maximum temperatures of 7°C in Marion, Illinois in December based on long-term weather averages. There are 4 hours of sunshine per day on average with 10 days with some rainfall and typically 102 mm of rainfall in the month.

  • 7°C maximum daytime temperature in December in Marion7
    7°C max day temperature
  • 4 hours of sunshine per day
  • 10 days with some rainfall in December in Marion10
    10 days with some rainfall
  • -3°C minimum night-time temperature in December in Marion-3
    -3°C min night temperature
  • 10 hours of daylight per day in December in Marion10
    10 hours of daylight per day
  • No heat & humidity in December in Marion0
    No heat & humidity
  • 102 mm monthly rainfall in December in Marion102
    102 mm of monthly rainfall
  • UV (maximum) index 2 (Low) in December in Marion2
    2 (Low) UV index

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The December weather guide for Illinois (Marion) 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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How cold is it in Marion in December?

Daytime temperatures usually reach 7°C in Marion in December, falling to -3°C at night.

How sunny is it in Marion in December?

There are normally 4 hours of bright sunshine each day in Marion in December - that's 43% of daylight hours.

Does it rain in Marion in December?

There are usually 10 days with some rain in Marion in December and the average monthly rainfall is 102mm. Rain may fall as snow in this month.

Marion December sunrise & sunset times

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

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Monday, 1st December 2025 06:53 16:37
Tuesday, 16th December 2025 07:05 16:39
Wednesday, 31st December 2025 07:11 16:47

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