Decatur weather in August 2020

  • 29°C maximum daytime temperature in August in Decatur29
    29°C max day temperature
  • 9 hours of sunshine per day
  • 8 days with some rainfall in August in Decatur8
    8 days with some rainfall
  • 17°C minimum night-time temperature in August in Decatur17
    17°C min night temperature
  • 14 hours of daylight per day in August in Decatur14
    14 hours of daylight per day
  • Moderate heat & humidity in August in DecaturM
    Moderate heat & humidity
  • 93 mm monthly rainfall in August in Decatur93
    93 mm of monthly rainfall
  • UV (maximum) index 8 (Very High) in August in Decatur8
    8 (Very High) UV index
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The August weather guide for Decatur, Illinois 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.

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How hot is it in Decatur in August?

Daytime temperatures usually reach 29°C in Decatur in August with moderate heat and humidity, falling to 17°C at night.

How sunny is it in Decatur in August?

There are normally 9 hours of bright sunshine each day in Decatur in August - that's 67% of daylight hours.

Does it rain in Decatur in August?

There are usually 8 days with some rain in Decatur in August and the average monthly rainfall is 93mm.

Decatur sunrise & sunset times for August 2020

Browse the sunrise & sunset times for Decatur in August 2020. Select a month to view Decatur sunrise & sunset times for the next twelve months.


Date Sunrise times Sunset times
Saturday, 1st August 2020 05:55 20:09
Sunday, 16th August 2020 06:09 19:50
Monday, 31st August 2020 06:23 19:28
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Metric (°C / mm)  |  Imperial (°F / inches)

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Where's hot in Illinois in August?

Below are average maximum temperatures at popular destinations in Illinois in August. Select a destination to see more weather parameters.

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