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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 Station65°
      Updated: 5:47 PM EDT on September 21, 2026 (GMT -4)
      5 minutes ago
      75°
      66°
      65
      Feels Like 65
      Rain
      N
      8
      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. / 0.42 in
        Periods of rain. Low 62F. Winds ENE at 10 to 15 mph. Chance of rain 100%. Rainfall near a half an inch.
        Tomorrow
        Tue 09/22
        High 65°f
         94% Precip. / 0.56 in
        Rain likely. High near 65F. Winds ENE at 15 to 25 mph. Chance of rain 90%. Rainfall around a half an inch.
        Tomorrow night
        Tue 09/22
        Low 58°f
         73% Precip. / 0.24 in
        Rain showers in the evening will evolve into a more steady rain overnight. Low 58F. Winds NE at 10 to 20 mph. Chance of rain 70%. Rainfall around a quarter of an inch.
        Hourly Forecast
        Now
        68°
        6PM
        100%
        68°
        7PM
        77%
        68°
        7:04PM
        Sunset
        8PM
        68°
        9PM
        68°
        10PM
        68°
        11PM
        67°
        12AM
        67°
        1AM
        38%
        67°
        2AM
        52%
        67°
        3AM
        67%
        66°
        4AM
        76%
        66°
        5AM
        90%
        66°
        6AM
        81%
        65°
        6:53AM
        Sunrise
        7AM
        88%
        64°
        8AM
        90%
        63°
        9AM
        75%
        64°
        10AM
        73%
        63°
        11AM
        82%
        63°
        12PM
        74%
        63°
        1PM
        70%
        64°
        2PM
        80%
        63°
        3PM
        84%
        63°
        4PM
        95%
        63°
        5PM
        78%
        63°
        Precipitation
        100%
        Rain likely to end around 7:45 PM
        Pollen
        Ragweed Pollen
        Moderate
        Air Quality
        19
        Good
        UV Index
        0
        Low
        Additional Conditions
        1. Pressure 30.04 in
        2. Visibility 4 miles
        3. Clouds Cloudy
        4. Dew Point64°F
        5. Humidity 88%
        6. Rainfall 0.26 in
        7. Snow Depth 0 in
         KANP Station History
        Almanac for September 21, 2026
        1. Forecast Average Record
        2. Temperature
        3. High 75°F 78°F 90°F 1998
        4. Low 66°F 63°F 33°F 1956
        5. Rain/Snow Depth
        6. Precipitation 0.42 in - in -
        7. Snow 0 in - in -
        Almanac for September 22, 2026
        1. Forecast Average Record
        2. Temperature
        3. High 68°F 78°F 90°F
        4. Low 66°F 62°F 39°F
        Astronomy
        1. Sun Rise Set
        2. Actual Time 6:52 AM 7:04 PM
        3. Civil Twilight 6:26 AM 7:31 PM
        4. Nautical Twilight 5:54 AM 8:02PM
        5. Astronomical Twilight 5:23 AM 8:34 PM
        1. Length of Visible Light 13h 4m
        2. Length of Day 12h 11m
        3. Tomorrow will be 2 minutes 31 seconds shorter
        1. Moon 4:39 PM 1:25 AM
        2. Waxing Gibbous77% 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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