McHenry Weather Today — Illinois, United States
Current temperature, rain chance, humidity, wind and air quality in McHenry, plus an hourly and 3-day forecast. Updated through the day.
10:45
Fri, 18 Sep 2026
📍 Illinois, United States
McHenry??
17
°C
Patchy rain nearby
Feels 17°C · 62°F
💧 93% Humidity
💨 ← 7.6 km/h WNW
👁 10 km Visibility
🌧 0.06 mm Precip
☁ 100% Cloud
☀️ UV Low
🌿 AQI Good
☀️ UV Index
1.9
Low
🔵 Pressure
1022
hPa · 30.18 in
💨 Wind
7.6
km/h · Gust 14.4 km/h
← WNW
💧 Humidity
93%
Dew point 15.4°C
👁 Visibility
10
km · 6 miles
🌡 Heat Index
16.6°
Wind chill 16.6°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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