McHenry County Weather Today — Illinois, United States
Current temperature, rain chance, humidity, wind and air quality in McHenry County, plus an hourly and 3-day forecast. Updated through the day.
12:42
Fri, 18 Sep 2026
📍 Illinois, United States
McHenry County??
17
°C
Patchy rain nearby
Feels 17°C · 63°F
💧 90% Humidity
💨 ↖ 8.3 km/h NW
👁 10 km Visibility
🌧 0.08 mm Precip
☁ 88% Cloud
☀️ UV Moderate
🌿 AQI Good
☀️ UV Index
4.8
Moderate
🔵 Pressure
1022
hPa · 30.17 in
💨 Wind
8.3
km/h · Gust 13.7 km/h
↖ NW
💧 Humidity
90%
Dew point 15.3°C
👁 Visibility
10
km · 6 miles
🌡 Heat Index
17°
Wind chill 17°C
🌿 Air Quality
Good
US EPA Index: 1
🌅
Sunrise
07:01 AM
🌇
Sunset
07:21 PM
📅 3-Day Forecast
Friday
18 Sep 2026
Patchy rain nearby
22°
/
15°
💧91%
🌧0.92mm
💨13
☀️UV 5.6
Saturday
19 Sep 2026
Sunny
22°
/
11°
💧78%
🌧0mm
💨15
☀️UV 7
Sunday
20 Sep 2026
Overcast
23°
/
15°
💧92%
🌧0.82mm
💨12
☀️UV 6.6
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