Williamson Weather Today — Illinois, United States
Current temperature, rain chance, humidity, wind and air quality in Williamson, plus an hourly and 3-day forecast. Updated through the day.
15:20
Fri, 18 Sep 2026
📍 Illinois, United States
Williamson??
29
°C
Light rain shower
Feels 33°C · 84°F
💧 72% Humidity
💨 ↖ 16.2 km/h NW
👁 10 km Visibility
🌧 2.13 mm Precip
☁ 78% Cloud
☀️ UV High
🌿 AQI Good
☀️ UV Index
6.1
High
🔵 Pressure
1013
hPa · 29.91 in
💨 Wind
16.2
km/h · Gust 27 km/h
↖ NW
💧 Humidity
72%
Dew point 23.1°C
👁 Visibility
10
km · 6 miles
🌡 Heat Index
32.6°
Wind chill 28.8°C
🌿 Air Quality
Good
US EPA Index: 1
🌅
Sunrise
06:38 AM
🌇
Sunset
06:50 PM
📅 3-Day Forecast
Friday
18 Sep 2026
Light rain shower
29°
/
26°
💧72%
🌧11.68mm
💨17
☀️UV 9.8
Saturday
19 Sep 2026
Overcast
29°
/
26°
💧68%
🌧1.29mm
💨16
☀️UV 11.2
Sunday
20 Sep 2026
Patchy rain nearby
29°
/
26°
💧72%
🌧9.14mm
💨14
☀️UV 11.2
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