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      Elev 633 ft, 39.821 °N 77.904 °W

      Mercersburg, PA

      Mercersburg Station55°
      Updated: 5:35 AM EDT on September 26, 2026 (GMT -4)
      2 minutes ago
      72°
      50°
      55
      Feels Like 55
      Clear
      N
      7
      Similar temperature is expected today
      Wundermap
      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
        Today
        Sat 09/26
        High 72°f
         21% Precip. / 0 in
        Sunny skies this morning will become overcast during the afternoon. High 72F. Winds NNW at 10 to 20 mph.
        Tonight
        Sat 09/26
        Low 59°f
         16% Precip. / 0 in
        Cloudy. Low 59F. Winds NNW at 10 to 15 mph.
        Tomorrow
        Sun 09/27
        High 64°f59°f
         66% Precip. / 0.1 in
        Cloudy early with showers for the afternoon hours. High 64F. Winds NNW at 10 to 20 mph. Chance of rain 70%.
        Hourly Forecast
        Now
        51°
        6AM
        52°
        7AM
        52°
        7:03AM
        Sunrise
        8AM
        54°
        9AM
        60°
        10AM
        63°
        11AM
        66°
        12PM
        67°
        1PM
        70°
        2PM
        71°
        3PM
        70°
        4PM
        70°
        5PM
        70°
        6PM
        69°
        7PM
        68°
        7:02PM
        Sunset
        8PM
        65°
        9PM
        65°
        10PM
        64°
        11PM
        63°
        12AM
        63°
        1AM
        63°
        2AM
        62°
        3AM
        62°
        4AM
        62°
        5AM
        61°
        Precipitation
        21%
        Pollen
        Ragweed Pollen
        High
        Air Quality
        21
        Good
        UV Index
        0
        Low
        Additional Conditions
        1. Pressure 29.98 in
        2. Visibility 10 miles
        3. Clouds Clear
        4. Dew Point46°F
        5. Humidity 82%
        6. Rainfall 0 in
        7. Snow Depth 0 in
         KHGR Station History
        Almanac for September 26, 2026
        1. Forecast Average Record
        2. Temperature
        3. High 72°F 74°F 93°F 1986
        4. Low 50°F 47°F 34°F 1989
        5. Rain/Snow Depth
        6. Precipitation 0 in 0.12 in -
        7. Snow 0 in - in -
        Almanac for September 27, 2026
        1. Forecast Average Record
        2. Temperature
        3. High 64°F 74°F 89°F
        4. Low 50°F 47°F 30°F
        Astronomy
        1. Sun Rise Set
        2. Actual Time 7:03 AM 7:01 PM
        3. Civil Twilight 6:36 AM 7:28 PM
        4. Nautical Twilight 6:04 AM 8:00PM
        5. Astronomical Twilight 5:32 AM 8:32 PM
        1. Length of Visible Light 12h 52m
        2. Length of Day 11h 58m
        3. Tomorrow will be 2 minutes 36 seconds shorter
        1. Moon 6:50 PM 6:55 AM
        2. Full99% 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
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