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      Elev 682 ft, 42.074 °N 87.968 °W

      Arlington Heights, IL

      Downtown Station80°
      Updated: 3:37 PM CDT on September 11, 2026 (GMT -5)
      5 minutes ago
      83°
      55°
      80
      Feels Like 80
      Partly Cloudy
      N
      7
      Similar temperature is expected tomorrow
      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
        Tonight
        Sat 09/12
        Low 64°f
         8% Precip. / 0 in
        Some clouds. Low 64F. Winds SSE at 5 to 10 mph.
        Tomorrow
        Sun 09/13
        High 85°f
         18% Precip. / 0 in
        Sunshine and clouds mixed. High around 85F. Winds WSW at 10 to 15 mph.
        Tomorrow night
        Sun 09/13
        Low 59°f
         3% Precip. / 0 in
        A mostly clear sky. Low 59F. Winds NNW at 5 to 10 mph.
        Hourly Forecast
        Now
        81°
        4PM
        81°
        5PM
        80°
        6PM
        78°
        7PM
        75°
        7:08PM
        Sunset
        8PM
        73°
        9PM
        71°
        10PM
        70°
        11PM
        69°
        12AM
        68°
        1AM
        67°
        2AM
        66°
        3AM
        66°
        4AM
        66°
        5AM
        65°
        6AM
        65°
        6:29AM
        Sunrise
        7AM
        65°
        8AM
        69°
        9AM
        73°
        10AM
        77°
        11AM
        79°
        12PM
        81°
        1PM
        82°
        2PM
        83°
        3PM
        84°
        Precipitation
        18%
        Pollen
        None
        Air Quality
        37
        Good
        UV Index
        3
        Moderate
        Additional Conditions
        1. Pressure 29.91 in
        2. Visibility 10 miles
        3. Clouds Partly Cloudy
        4. Dew Point54°F
        5. Humidity 39%
        6. Rainfall 0 in
        7. Snow Depth 0 in
         KPWK Station History
        Almanac for September 11, 2026
        1. Forecast Average Record
        2. Temperature
        3. High 83°F 77°F 95°F 1952
        4. Low 55°F 59°F 41°F 1967
        5. Rain/Snow Depth
        6. Precipitation 0 in 3.4 in -
        7. Snow 0 in 0 in -
        Almanac for September 12, 2026
        1. Forecast Average Record
        2. Temperature
        3. High 85°F 77°F 96°F
        4. Low 55°F 59°F 37°F
        Astronomy
        1. Sun Rise Set
        2. Actual Time 6:27 AM 7:08 PM
        3. Civil Twilight 5:59 AM 7:36 PM
        4. Nautical Twilight 5:26 AM 8:09PM
        5. Astronomical Twilight 4:51 AM 8:44 PM
        1. Length of Visible Light 13h 36m
        2. Length of Day 12h 40m
        3. Tomorrow will be 2 minutes 48 seconds shorter
        1. Moon 7:00 AM 7:14 PM
        2. Waxing Crescent0% of the Moon is Illuminated
        Sep 18
        Waxing Half First Qtr
        Sep 26
        Full Moon
        Oct 3
        Waning Half Last Qtr
        Oct 10
        New Moon
        Precipitation
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