Decatur weather in August 2019

  • 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

Going to Decatur? Find the best month to visit Decatur based on the weather.

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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 2019/2020.

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More about Decatur

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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.

Metric (°C / mm)  |  Imperial (°F / inches)

Guide to Decatur weather in August

The average maximum daytime temperature in Decatur in August is a warm 29°C (84°F) with moderate heat & humidity. The average night-time temperature is usually a comfortable 17°C (63°F). There are usually 9 hours of bright sunshine each day, which represents 67% of the 14 hours of daylight.

Expect 93mm (3.7 inches) of rainfall across the whole of August with 8 days with some rain falling. Maximum UV levels will be very high (8 UV index) at midday when the skies are clear.

Decatur sunrise & sunset times for August 2019

Browse the sunrise & sunset times for Decatur in August 2019. Select a month to view Decatur sunrise & sunset times for the next twelve months.

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Thursday, 1st August 2019 05:54 20:09
Friday, 2nd August 2019 05:55 20:08
Saturday, 3rd August 2019 05:56 20:07
Sunday, 4th August 2019 05:57 20:06
Monday, 5th August 2019 05:58 20:05
Tuesday, 6th August 2019 05:59 20:04
Wednesday, 7th August 2019 06:00 20:03
Thursday, 8th August 2019 06:01 20:01
Friday, 9th August 2019 06:02 20:00
Saturday, 10th August 2019 06:03 19:59
Sunday, 11th August 2019 06:04 19:58
Monday, 12th August 2019 06:05 19:56
Tuesday, 13th August 2019 06:06 19:55
Wednesday, 14th August 2019 06:07 19:54
Thursday, 15th August 2019 06:07 19:52
Friday, 16th August 2019 06:08 19:51
Saturday, 17th August 2019 06:09 19:50
Sunday, 18th August 2019 06:10 19:48
Monday, 19th August 2019 06:11 19:47
Tuesday, 20th August 2019 06:12 19:46
Wednesday, 21st August 2019 06:13 19:44
Thursday, 22nd August 2019 06:14 19:43
Friday, 23rd August 2019 06:15 19:41
Saturday, 24th August 2019 06:16 19:40
Sunday, 25th August 2019 06:17 19:38
Monday, 26th August 2019 06:18 19:37
Tuesday, 27th August 2019 06:19 19:35
Wednesday, 28th August 2019 06:20 19:34
Thursday, 29th August 2019 06:21 19:32
Friday, 30th August 2019 06:22 19:31
Saturday, 31st August 2019 06:23 19:29
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