Decatur weather in August 2024

Expect 29°C daytime maximum temperatures in the shade with on average 9 hours of sunshine per day in Decatur in August. Check more long-term weather averages for Decatur in August before you book your next holiday to Illinois in 2024/2025.

• 29
  29°C max day temperature
• 9
  9 hours of sunshine per day
• 8
  8 days with some rainfall
• 17
  17°C min night temperature
• 14
  14 hours of daylight per day
• M
  Moderate heat & humidity
• 93
  93 mm of monthly rainfall
• 8
  8 (Very High) UV index

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The August 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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Decatur August sunrise & sunset times

Browse the sunrise and sunset times for Decatur in August 2024. Select a month to view Decatur sunrise and sunset times for the next 12 months.

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