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      Heat Advisory
      until 10:00 PM CDT
      Elev 797 ft, 42.333 °N 88.268 °W

      McHenry, IL

      McHenry Station75°
      Updated: 10:34 AM CDT on September 4, 2026 (GMT -5)
      4 minutes ago
      90°
      71°
      75
      Feels Like 77
      Partly Cloudy
      N
      11
      Gusts 19 mph
      Similar temperature is expected today
      50
      50
      575
      90
      50
      7
      0 mph
      50
      50
      50
      50
      50
      50
      Radar · Now
        Hyper-local data from Weather Underground's network of
        400,000+ personal weather stations worldwide
        Today
        Sat 09/05
        High 90°f
         88% Precip. / 0.1 in
        Scattered thunderstorms during the morning. Partly cloudy skies this afternoon. Storms may contain strong gusty winds. High near 90F. Winds SW at 10 to 15 mph. Chance of rain 90%.
        Tonight
        Sat 09/05
        Low 68°f
         63% Precip. / 0.47 in
        Thunderstorms this evening, then skies turning partly cloudy after midnight. Storms may contain strong gusty winds. Low 68F. Winds ENE at 5 to 10 mph. Chance of rain 60%.
        Tomorrow
        Sun 09/06
        High 79°f64°f
         24% Precip. / 0 in
        Cloudy. A stray shower or thunderstorm is possible. High 79F. Winds NE at 5 to 10 mph.
        Hourly Forecast
        Now
        76°
        11AM
        71%
        78°
        12PM
        61%
        80°
        1PM
        81°
        2PM
        87°
        3PM
        88°
        4PM
        88°
        5PM
        89°
        6PM
        88°
        7PM
        33%
        80°
        7:21PM
        Sunset
        8PM
        31%
        78°
        9PM
        76°
        10PM
        42%
        75°
        11PM
        53%
        75°
        12AM
        63%
        74°
        1AM
        37%
        72°
        2AM
        72°
        3AM
        71°
        4AM
        70°
        5AM
        69°
        6AM
        70°
        6:22AM
        Sunrise
        7AM
        70°
        8AM
        73°
        9AM
        74°
        10AM
        76°
        Precipitation
        71%
        Thunderstorms likely around 11:00 AM
        Pollen
        Grass Pollen
        Low
        Air Quality
        47
        Good
        UV Index
        5
        Moderate
        Additional Conditions
        1. Pressure 29.93 in
        2. Visibility 10 miles
        3. Clouds Partly Cloudy
        4. Dew Point72°F
        5. Humidity 89%
        6. Rainfall 0.01 in
        7. Snow Depth 0 in
         KUGN Station History
        Almanac for September 4, 2026
        1. Forecast Average Record
        2. Temperature
        3. High 90°F 78°F 95°F 1922
        4. Low 71°F 59°F 39°F 1974
        5. Rain/Snow Depth
        6. Precipitation 0.56 in - in -
        7. Snow 0 in - in -
        Almanac for September 5, 2026
        1. Forecast Average Record
        2. Temperature
        3. High 79°F 78°F 97°F
        4. Low 71°F 59°F 39°F
        Astronomy
        1. Sun Rise Set
        2. Actual Time 6:21 AM 7:21 PM
        3. Civil Twilight 5:52 AM 7:50 PM
        4. Nautical Twilight 5:18 AM 8:24PM
        5. Astronomical Twilight 4:42 AM 9:00 PM
        1. Length of Visible Light 13h 57m
        2. Length of Day 13h 0m
        3. Tomorrow will be 2 minutes 46 seconds shorter
        1. Moon 11:33 PM 3:02 PM
        2. Last Quarter40% of the Moon is Illuminated
        Sep 4
        Waning Half Last Qtr
        Sep 10
        New Moon
        Sep 18
        Waxing Half First Qtr
        Sep 26
        Full Moon
        Precipitation
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