Marion weather in May 2025

Expect 77°F daytime maximum temperatures in the shade with on average 9 hours of sunshine per day in Marion in May. Check more long-term weather averages for Marion in May before you book your next holiday to Illinois in 2025/2026.

  • 77°F maximum daytime temperature in May in Marion77
    77°F max day temperature
  • 9 hours of sunshine per day
  • 10 days with some rainfall in May in Marion10
    10 days with some rainfall
  • 54°F minimum night-time temperature in May in Marion54
    54°F min night temperature
  • 14 hours of daylight per day in May in Marion14
    14 hours of daylight per day
  • No heat & humidity in May in Marion0
    No heat & humidity
  • 4.9 inches monthly rainfall in May in Marion4.9
    4.9 inches of monthly rainfall
  • UV (maximum) index 8 (Very High) in May in Marion8
    8 (Very High) UV index

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The May 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)  |  Imperial (°F)

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How hot is it in Marion in May?

Daytime temperatures usually reach 77°F in Marion in May with no heat and humidity, falling to 54°F at night.

How sunny is it in Marion in May?

There are normally 9 hours of bright sunshine each day in Marion in May - that's 63% of daylight hours.

Does it rain in Marion in May?

There are usually 10 days with some rain in Marion in May and the average monthly rainfall is 4.9 inches.

Marion May sunrise & sunset times

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

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Thursday, 1st May 2025 05:00 18:47
Friday, 16th May 2025 04:45 19:00
Saturday, 31st May 2025 04:36 19:11

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