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      Coastal Flood Advisory
      until 6:00 AM EDT
      +1 more alert
      Elev 143 ft, 39.039 °N 76.497 °W

      Arnold, MD

      Briar Lea Station81°
      Updated: 4:37 PM EDT on September 20, 2026 (GMT -4)
      2 minutes ago
      84°
      71°
      81
      Feels Like 85
      Mostly Cloudy
      N
      6
      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
        Sun 09/20
        Low 67°f
         37% Precip. / 0 in
        Rain showers this evening with clearing overnight. Low 67F. Winds NW at 5 to 10 mph. Chance of rain 40%.
        Tomorrow
        Mon 09/21
        High 71°f
         38% Precip. / 0.03 in
        Mostly cloudy in the morning then periods of showers later in the day. High 71F. Winds NE at 10 to 15 mph. Chance of rain 40%.
        Tomorrow night
        Mon 09/21
        Low 62°f
         87% Precip. / 0.56 in
        Rain likely. Low 62F. Winds ENE at 10 to 15 mph. Chance of rain 90%. Rainfall around a half an inch.
        Hourly Forecast
        Now
        83°
        5PM
        83°
        6PM
        79°
        7PM
        78°
        7:06PM
        Sunset
        8PM
        31%
        76°
        9PM
        75°
        10PM
        74°
        11PM
        73°
        12AM
        73°
        1AM
        73°
        2AM
        72°
        3AM
        72°
        4AM
        71°
        5AM
        70°
        6AM
        69°
        6:52AM
        Sunrise
        7AM
        68°
        8AM
        69°
        9AM
        69°
        10AM
        69°
        11AM
        70°
        12PM
        70°
        1PM
        70°
        2PM
        69°
        3PM
        31%
        70°
        4PM
        37%
        70°
        Precipitation
        37%
        Rain possible after 8 PM
        Pollen
        Ragweed Pollen
        High
        Air Quality
        39
        Good
        UV Index
        1
        Low
        Additional Conditions
        1. Pressure 29.87 in
        2. Visibility 9 miles
        3. Clouds Mostly Cloudy
        4. Dew Point69°F
        5. Humidity 63%
        6. Rainfall 0.16 in
        7. Snow Depth 0 in
         KANP Station History
        Almanac for September 20, 2026
        1. Forecast Average Record
        2. Temperature
        3. High 84°F 79°F 96°F 1998
        4. Low 71°F 63°F 40°F 1959
        5. Rain/Snow Depth
        6. Precipitation 0 in - in -
        7. Snow 0 in - in -
        Almanac for September 21, 2026
        1. Forecast Average Record
        2. Temperature
        3. High 74°F 78°F 90°F
        4. Low 71°F 63°F 33°F
        Astronomy
        1. Sun Rise Set
        2. Actual Time 6:51 AM 7:06 PM
        3. Civil Twilight 6:25 AM 7:32 PM
        4. Nautical Twilight 5:53 AM 8:04PM
        5. Astronomical Twilight 5:22 AM 8:35 PM
        1. Length of Visible Light 13h 7m
        2. Length of Day 12h 14m
        3. Tomorrow will be 2 minutes 31 seconds shorter
        1. Moon 4:04 PM 12:24 AM
        2. Waxing Gibbous68% 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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