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Decatur weather in July 2025
Expect 88°F daytime maximum temperatures in the shade with on average 10 hours of sunshine per day in Decatur in July. Check more long-term weather averages for Decatur in July before you book your next holiday to Illinois in 2025/2026.
- 8888°F max day temperature
- 10 hours of sunshine per day
- 99 days with some rainfall
- 6464°F min night temperature
- 1515 hours of daylight per day
- HHigh heat & humidity
- 4.24.2 inches of monthly rainfall
- 99 (Very High) UV index
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Decatur by month
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Recommended for Illinois
The July 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)
More about the USA
How hot is it in Decatur in July?
Daytime temperatures usually reach 88°F in Decatur in July with high heat and humidity, falling to 64°F at night.
How sunny is it in Decatur in July?
There are normally 10 hours of bright sunshine each day in Decatur in July - that's 70% of daylight hours.
Does it rain in Decatur in July?
There are usually 9 days with some rain in Decatur in July and the average monthly rainfall is 4.2 inches.
Decatur July sunrise & sunset times
Browse the sunrise and sunset times for Decatur in July 2025. Select a month to view Decatur sunrise and sunset times for the next 12 months.
JanFebMarAprMayJunJulAugSepOctNovDec
Date | Sunrise times | Sunset times |
---|---|---|
Tuesday, 1st July 2025 | 04:31 | 19:28 |
Wednesday, 16th July 2025 | 04:41 | 19:22 |
Thursday, 31st July 2025 | 04:54 | 19:10 |
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