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      Small Craft Advisory
      until 6:00 AM EDT
      Elev 143 ft, 39.039 °N 76.497 °W

      Arnold, MD

      Briar Lea Station64°
      Updated: 10:18 PM EDT on September 21, 2026 (GMT -4)
      4 minutes ago
      75°
      65°
      64
      Feels Like 64
      Cloudy
      N
      10
      Lower 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
        Mon 09/21
        Low 62°f
         100% Precip. / 0.14 in
        Cloudy skies with periods of light rain late. Low 62F. Winds ENE at 10 to 15 mph. Chance of rain 100%.
        Tomorrow
        Tue 09/22
        High 65°f
         92% Precip. / 0.53 in
        Rain likely. High near 65F. Winds ENE at 10 to 20 mph. Chance of rain 90%. Rainfall around a half an inch.
        Tomorrow night
        Tue 09/22
        Low 58°f
         77% Precip. / 0.33 in
        Showers early, becoming a steady rain late. Low 58F. Winds NE at 10 to 20 mph. Chance of rain 80%. Rainfall around a quarter of an inch.
        Hourly Forecast
        Now
        65°
        11PM
        65°
        12AM
        65°
        1AM
        65°
        2AM
        36%
        66°
        3AM
        96%
        66°
        4AM
        100%
        66°
        5AM
        66%
        65°
        6AM
        62%
        64°
        6:53AM
        Sunrise
        7AM
        76%
        64°
        8AM
        72%
        63°
        9AM
        93%
        63°
        10AM
        92%
        62°
        11AM
        79%
        62°
        12PM
        69%
        63°
        1PM
        61%
        63°
        2PM
        76%
        63°
        3PM
        89%
        63°
        4PM
        91%
        63°
        5PM
        79%
        64°
        6PM
        87%
        63°
        7PM
        75%
        63°
        7:02PM
        Sunset
        8PM
        49%
        63°
        9PM
        44%
        62°
        10PM
        58%
        62°
        Precipitation
        100%
        Rain possible after 2 AM
        Pollen
        Ragweed Pollen
        High
        Air Quality
        28
        Good
        UV Index
        0
        Low
        Additional Conditions
        1. Pressure 30.1 in
        2. Visibility 10 miles
        3. Clouds Cloudy
        4. Dew Point63°F
        5. Humidity 94%
        6. Rainfall 0.51 in
        7. Snow Depth 0 in
         KANP Station History
        Almanac for September 22, 2026
        1. Forecast Average Record
        2. Temperature
        3. High 75°F 78°F 90°F 1980
        4. Low 65°F 62°F 39°F 1962
        5. Rain/Snow Depth
        6. Precipitation 0.14 in - in -
        7. Snow 0 in - in -
        Almanac for September 23, 2026
        1. Forecast Average Record
        2. Temperature
        3. High 67°F 78°F 93°F
        4. Low 65°F 62°F 43°F
        Astronomy
        1. Sun Rise Set
        2. Actual Time 6:53 AM 7:02 PM
        3. Civil Twilight 6:27 AM 7:29 PM
        4. Nautical Twilight 5:55 AM 8:00PM
        5. Astronomical Twilight 5:24 AM 8:32 PM
        1. Length of Visible Light 13h 2m
        2. Length of Day 12h 9m
        3. Tomorrow will be 2 minutes 31 seconds shorter
        1. Moon 5:08 PM 2:28 AM
        2. Waxing Gibbous84% of the Moon is Illuminated
        Sep 26
        Full Moon
        Oct 3
        Waning Half Last Qtr
        Oct 10
        New Moon
        Oct 18
        Waxing Half First Qtr
        Precipitation
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