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Williamson County (Energy)
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United States weather

Weather in Williamson County, Illinois for August 2026

Your guide to Williamson County weather in August - trends and predictions

    Temperatures

  • In general, the average temperature in Williamson County at the beginning of August is 30.9 °F. As the month progressed, temperatures tended to moderately rise, reaching an average of 31.4 °F by the end of August.

    • Rain 🌧️

  • Williamson County experiences moderate rainfall in August, with an average of 6 rainy days and a total precipitation of 54.8 mm.

    • More

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Average dry days
25
Dry days
Average rainy days
6
Rainy days
Average snowy days
0
Snow days
Average temperatures
33°/19°
Temperatures
Average wind speed
18 km/h
Avg max wind
Average humidity
57 %
Avg humidity

Williamson County Weather August

Move between months or click on a day
July
September
Sun.Mon.Tue.Wed.Thu.Fri.Sat.
1
Sunny
32°
2
Partly cloudy
29°
3
Fog
30°
4
Partly cloudy
30°
5
Sunny
33°
6
Sunny
33°
7
Overcast
29°
8
Mist
31°
9
Partly cloudy
29°
10
Partly cloudy
30°
11
Partly cloudy
32°
12
Light rain shower
28°
13
Patchy rain possible
30°
14
Patchy rain possible
31°
15
Patchy light drizzle
34°
16
Light rain shower
35°
17
Patchy rain possible
34°
18
Partly cloudy
33°
19
Mist
32°
20
Sunny
28°
21
Overcast
28°
22
Partly cloudy
29°
23
Partly cloudy
32°
24
Partly cloudy
31°
25
Partly cloudy
29°
26
Sunny
33°
27
Partly cloudy
33°
28
Partly cloudy
33°
29
Partly cloudy
34°
30
Patchy rain possible
32°
31
Light rain shower
26°

Temperatures trend during August in Williamson County

See the weather trend as well as the moving average line

August weather in Williamson County day by day

Click on a date for more information
July September
Date Weather Temperatures Rain UV More
Aug. 1 Sunny
Sunny
 32° /21° 0.7 mm 8
Aug. 2 Partly cloudy
Partly cloudy
 29° /18° 0.1 mm 7
Aug. 3 Fog
Fog
 30° /18° 0 mm 7
Aug. 4 Partly cloudy
Partly cloudy
 30° /19° 1.9 mm 7
Aug. 5 Sunny
Sunny
 33° /20° 0 mm 8
Aug. 6 Sunny
Sunny
 33° /22° 0 mm 8
Aug. 7 Overcast
Overcast
 29° /20° 0 mm 7
Aug. 8 Mist
Mist
 31° /20° 0 mm 7
Aug. 9 Partly cloudy
Partly cloudy
 29° /19° 0 mm 7
Aug. 10 Partly cloudy
Partly cloudy
 30° /19° 0 mm 8
Aug. 11 Partly cloudy
Partly cloudy
 32° /18° 0 mm 8
Aug. 12 Light rain shower
Light rain shower
 28° /19° 2.3 mm 6
Aug. 13 Patchy rain possible
Patchy rain possible
 30° /20° 0 mm 7
Aug. 14 Patchy rain possible
Patchy rain possible
 31° /21° 0.1 mm 7
Aug. 15 Patchy light drizzle
Patchy light drizzle
 34° /22° 16.5 mm 8
Aug. 16 Light rain shower
Light rain shower
 35° /22° 3.5 mm 9
Aug. 17 Patchy rain possible
Patchy rain possible
 34° /22° 0.1 mm 7
Aug. 18 Partly cloudy
Partly cloudy
 33° /20° 0 mm 9
Aug. 19 Mist
Mist
 32° /20° 2 mm 7
Aug. 20 Sunny
Sunny
 28° /13° 0 mm 7
Aug. 21 Overcast
Overcast
 28° /16° 0 mm 6
Aug. 22 Partly cloudy
Partly cloudy
 29° /14° 0 mm 7
Aug. 23 Partly cloudy
Partly cloudy
 32° /16° 0 mm 8
Aug. 24 Partly cloudy
Partly cloudy
 31° /20° 0 mm 8
Aug. 25 Partly cloudy
Partly cloudy
 29° /17° 0 mm 7
Aug. 26 Sunny
Sunny
 33° /15° 0 mm 8
Aug. 27 Partly cloudy
Partly cloudy
 33° /18° 0 mm 9
Aug. 28 Partly cloudy
Partly cloudy
 33° /19° 0 mm 8
Aug. 29 Partly cloudy
Partly cloudy
 34° /17° 0 mm 8
Aug. 30 Patchy rain possible
Patchy rain possible
 32° /19° 3.3 mm 7
Aug. 31 Light rain shower
Light rain shower
 26° /19° 0.7 mm 6
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Important Notice
Our weather forecast for Williamson County in August is based on the analysis of historical data rather than real-time forecast models. While this provides a general overview, weather conditions can change. We recommend that you check the Williamson County forecast closer to your planned date for the most up-to-date weather information.
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Williamson County in August - FAQ

What are the expected maximum and minimum temperatures in Williamson County during August?
Expect warm days with temperatures around 33°, cooling to mild conditions of 19° after sunset. Perfect for those who enjoy warm weather.
How much rainfall should be expected in Williamson County during August?
Moderate rainfall is anticipated in Williamson County during August, with a total of 54.8 mm spread over approximately 6 days. Considering plans for rainy days is advisable.
What are the typical wind conditions in Williamson County during August?
The average wind speed in Williamson County during August is 18 km/h, suggesting breezy to windy conditions, depending on your activities.

August rainfall patterns in Williamson County

Explore the daily rainfall trends and prepare for Williamson Countys August weather 💧

UV exposure in Williamson County during August

Stay informed about UV levels for safe outdoor activities throughout the month of August ☀️
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Location coordinates Where is Williamson County?

Get accurate weather forecasts for Williamson County, located at latitude 37.774 and longitude -89.026. Stay updated with localized weather information tailored for Williamson County.

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