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      Elev 1703 ft, 41.424 °N 78.570 °W

      St. Marys, PA

      St Marys Municipal Airport Station51°
      Updated: 9:11 AM EDT on September 21, 2026 (GMT -4)
      1 minute ago
      66°
      49°
      51
      Feels Like 51
      Partly Cloudy
      N
      9
      Gusts 18 mph
      Lower temperature is expected today
      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
        Mon 09/21
        High 66°f
         15% Precip. / 0 in
        A mix of clouds and sun during the morning will give way to cloudy skies this afternoon. Slight chance of a rain shower. High 66F. Winds ENE at 5 to 10 mph.
        Tonight
        Mon 09/21
        Low 51°f
         73% Precip. / 0.17 in
        Cloudy with periods of rain. Low 51F. Winds ENE at 5 to 10 mph. Chance of rain 70%.
        Tomorrow
        Tue 09/22
        High 58°f48°f
         44% Precip. / 0.03 in
        Showers in the morning, then cloudy in the afternoon. High 58F. Winds E at 5 to 10 mph. Chance of rain 40%.
        Hourly Forecast
        Now
        54°
        10AM
        56°
        11AM
        58°
        12PM
        60°
        1PM
        62°
        2PM
        63°
        3PM
        64°
        4PM
        64°
        5PM
        63°
        6PM
        62°
        7PM
        60°
        7:13PM
        Sunset
        8PM
        58°
        9PM
        41%
        56°
        10PM
        46%
        55°
        11PM
        62%
        54°
        12AM
        56%
        53°
        1AM
        58%
        53°
        2AM
        53%
        52°
        3AM
        53%
        52°
        4AM
        60%
        52°
        5AM
        56%
        52°
        6AM
        49%
        52°
        7AM
        43%
        51°
        7:01AM
        Sunrise
        8AM
        40%
        52°
        9AM
        35%
        52°
        Precipitation
        62%
        Pollen
        None
        Air Quality
        19
        Good
        UV Index
        1
        Low
        Additional Conditions
        1. Pressure 30.14 in
        2. Visibility 10 miles
        3. Clouds Partly Cloudy
        4. Dew Point48°F
        5. Humidity 81%
        6. Rainfall 0.09 in
        7. Snow Depth 0 in
         KOYM Station History
        Almanac for September 21, 2026
        1. Forecast Average Record
        2. Temperature
        3. High 66°F 72°F 87°F 1951
        4. Low 49°F 47°F 26°F 1929
        5. Rain/Snow Depth
        6. Precipitation 0.17 in 3.1 in -
        7. Snow 0 in 0 in -
        Almanac for September 22, 2026
        1. Forecast Average Record
        2. Temperature
        3. High 58°F 71°F 89°F
        4. Low 49°F 47°F 28°F
        Astronomy
        1. Sun Rise Set
        2. Actual Time 7:00 AM 7:13 PM
        3. Civil Twilight 6:33 AM 7:40 PM
        4. Nautical Twilight 6:00 AM 8:12PM
        5. Astronomical Twilight 5:27 AM 8:45 PM
        1. Length of Visible Light 13h 7m
        2. Length of Day 12h 12m
        3. Tomorrow will be 2 minutes 44 seconds shorter
        1. Moon 4:54 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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