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Decatur weather in October 2025
Expect 20°C daytime maximum temperatures in the shade with on average 7 hours of sunshine per day in Decatur in October. Check more long-term weather averages for Decatur in October before you book your next holiday to Illinois in 2025/2026.
- 2020°C max day temperature
- 7 hours of sunshine per day
- 88 days with some rainfall
- 66°C min night temperature
- 1111 hours of daylight per day
- 0No heat & humidity
- 7070 mm of monthly rainfall
- 44 (Moderate) UV index
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Decatur by month
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Recommended for Illinois
The October 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)
More about the USA
How hot is it in Decatur in October?
Daytime temperatures usually reach 20°C in Decatur in October, falling to 6°C at night.
How sunny is it in Decatur in October?
There are normally 7 hours of bright sunshine each day in Decatur in October - that's 60% of daylight hours.
Does it rain in Decatur in October?
There are usually 8 days with some rain in Decatur in October and the average monthly rainfall is 70mm.
Decatur October sunrise & sunset times
Browse the sunrise and sunset times for Decatur in October 2025. Select a month to view Decatur sunrise and sunset times for the next 12 months.
JanFebMarAprMayJunJulAugSepOctNovDec
Date | Sunrise times | Sunset times |
---|---|---|
Wednesday, 1st October 2025 | 05:52 | 17:38 |
Thursday, 16th October 2025 | 06:08 | 17:14 |
Friday, 31st October 2025 | 06:24 | 16:54 |
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