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      Flood Watch
      until 12:00 PM EDT
      Elev 144 ft, 40.098 °N 75.382 °W

      King of Prussia, PA

      Hidden Valley Station81°
      Updated: 4:54 PM EDT on September 12, 2026 (GMT -4)
      5 minutes ago
      82°
      60°
      81
      Feels Like 83
      Mostly Cloudy
      N
      8
      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 70°f
         75% Precip. / 0.36 in
        Cloudy skies early, then thunderstorms developing late. Low around 70F. Winds SE at 5 to 10 mph. Chance of rain 80%. Locally heavy rainfall possible.
        Tomorrow
        Sun 09/13
        High 84°f
         87% Precip. / 0.26 in
        Thunderstorms in the morning, then skies turning partly cloudy late. High 84F. Winds NW at 5 to 10 mph. Chance of rain 90%.
        Tomorrow night
        Sun 09/13
        Low 69°f
         24% Precip. / 0 in
        Mostly clear skies. Slight chance of a rain shower. Low 69F. Winds WNW at 5 to 10 mph.
        Hourly Forecast
        Now
        80°
        5PM
        80°
        6PM
        79°
        7PM
        78°
        7:15PM
        Sunset
        8PM
        76°
        9PM
        74°
        10PM
        74°
        11PM
        73°
        12AM
        73°
        1AM
        59%
        72°
        2AM
        67%
        72°
        3AM
        73%
        72°
        4AM
        68%
        72°
        5AM
        68%
        72°
        6AM
        75%
        72°
        6:40AM
        Sunrise
        7AM
        88%
        71°
        8AM
        82%
        72°
        9AM
        62%
        73°
        10AM
        53%
        74°
        11AM
        36%
        76°
        12PM
        77°
        1PM
        79°
        2PM
        81°
        3PM
        83°
        4PM
        83°
        Precipitation
        88%
        Pollen
        Ragweed Pollen
        Low
        Air Quality
        35
        Good
        UV Index
        1
        Low
        Additional Conditions
        1. Pressure 30.02 in
        2. Visibility 10 miles
        3. Clouds Mostly Cloudy
        4. Dew Point62°F
        5. Humidity 54%
        6. Rainfall 0 in
        7. Snow Depth 0 in
         KLOM Station History
        Almanac for September 12, 2026
        1. Forecast Average Record
        2. Temperature
        3. High 82°F 82°F 98°F 1983
        4. Low 60°F 59°F 45°F 1977
        5. Rain/Snow Depth
        6. Precipitation 0.36 in 3.3 in -
        7. Snow 0 in 0 in -
        Almanac for September 13, 2026
        1. Forecast Average Record
        2. Temperature
        3. High 84°F 81°F 95°F
        4. Low 60°F 59°F 45°F
        Astronomy
        1. Sun Rise Set
        2. Actual Time 6:39 AM 7:15 PM
        3. Civil Twilight 6:12 AM 7:42 PM
        4. Nautical Twilight 5:40 AM 8:14PM
        5. Astronomical Twilight 5:06 AM 8:47 PM
        1. Length of Visible Light 13h 30m
        2. Length of Day 12h 35m
        3. Tomorrow will be 2 minutes 36 seconds shorter
        1. Moon 8:15 AM 7:46 PM
        2. Waxing Crescent2% 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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