Johnson County Weather Today — Illinois, United States
Current temperature, rain chance, humidity, wind and air quality in Johnson County, plus an hourly and 3-day forecast. Updated through the day.
08:58
Sat, 19 Sep 2026
📍 Illinois, United States
Johnson County??
21
°C
Mist
Feels 24°C · 71°F
💧 95% Humidity
💨 ← 5 km/h WSW
👁 2 km Visibility
🌧 0 mm Precip
☁ 100% Cloud
☀️ UV Low
🌿 AQI Good
☀️ UV Index
0.4
Low
🔵 Pressure
1015
hPa · 29.99 in
💨 Wind
5
km/h · Gust 22.4 km/h
← WSW
💧 Humidity
95%
Dew point 20.5°C
👁 Visibility
2
km · 1 miles
🌡 Heat Index
24.2°
Wind chill 21.4°C
🌿 Air Quality
Good
US EPA Index: 1
🌅
Sunrise
06:22 AM
🌇
Sunset
06:30 PM
📅 3-Day Forecast
Saturday
19 Sep 2026
Fog
28°
/
21°
💧89%
🌧4.22mm
💨9
☀️UV 7
Sunday
20 Sep 2026
Patchy rain nearby
26°
/
21°
💧90%
🌧0.72mm
💨10
☀️UV 4.3
Monday
21 Sep 2026
Light rain shower
27°
/
21°
💧92%
🌧6.98mm
💨9
☀️UV 7.9
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