National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce
Current conditions at

St Marys Municipal Airport (KOYM)

Lat: 41.41°NLon: 78.5°WElev: 1934ft.

Overcast

52°F

11°C

Humidity 88%
Wind Speed N 6 mph
Barometer 30.16 in
Dewpoint 48°F (9°C)
Visibility 10.00 mi
Wind Chill50°F (10°C)
Last update 14 Oct 3:15 am EDT
Extended Forecast for

Saint Marys PA

  • Overnight

    Overnight: Cloudy, with a low around 46. Light north wind.

    Low: 46 °F

    Cloudy

  • Tuesday

    Tuesday: Cloudy, then gradually becoming mostly sunny, with a high near 67. North wind 6 to 8 mph.

    High: 67 °F

    Decreasing
    Clouds

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 42. Northwest wind around 5 mph becoming calm in the evening.

    Low: 42 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Mostly sunny, with a high near 61. North wind 5 to 10 mph.

    High: 61 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 31. North wind around 6 mph becoming calm in the evening.

    Low: 31 °F

    Mostly Clear

  • Thursday

    Thursday: Sunny, with a high near 58.

    High: 58 °F

    Sunny

  • Thursday Night

    Thursday Night: Widespread frost, mainly after 2am. Otherwise, mostly clear, with a low around 29.

    Low: 29 °F

    Mostly Clear
    then Frost

  • Friday

    Friday: Widespread frost, mainly before 9am. Otherwise, sunny, with a high near 63.

    High: 63 °F

    Frost then
    Mostly Sunny

  • Friday Night

    Friday Night: A chance of showers after 2am. Mostly cloudy, with a low around 40. Chance of precipitation is 30%.

    Low: 40 °F

    Mostly Cloudy
    then Chance
    Showers

Detailed Forecast

Overnight
Cloudy, with a low around 46. Light north wind.
Tuesday
Cloudy, then gradually becoming mostly sunny, with a high near 67. North wind 6 to 8 mph.
Tuesday Night
Partly cloudy, with a low around 42. Northwest wind around 5 mph becoming calm in the evening.
Wednesday
Mostly sunny, with a high near 61. North wind 5 to 10 mph.
Wednesday Night
Mostly clear, with a low around 31. North wind around 6 mph becoming calm in the evening.
Thursday
Sunny, with a high near 58.
Thursday Night
Widespread frost, mainly after 2am. Otherwise, mostly clear, with a low around 29.
Friday
Widespread frost, mainly before 9am. Otherwise, sunny, with a high near 63.
Friday Night
A chance of showers after 2am. Mostly cloudy, with a low around 40. Chance of precipitation is 30%.
Saturday
A chance of showers before 8am. Partly sunny, with a high near 70. Chance of precipitation is 30%.
Saturday Night
A chance of showers. Mostly cloudy, with a low around 50. Chance of precipitation is 50%.
Sunday
Showers likely. Mostly cloudy, with a high near 67. Chance of precipitation is 70%.
Sunday Night
Showers likely. Mostly cloudy, with a low around 40. Chance of precipitation is 60%.
Monday
A chance of showers. Partly sunny, with a high near 55. Chance of precipitation is 40%.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Saint Marys PA
 41.44°N 78.57°W (Elev. 1795 ft)
Last Update:
3:06 am EDT Oct 14, 2025
Forecast Valid:
3am EDT Oct 14, 2025-6pm EDT Oct 20, 2025
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

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Hourly Weather Forecast

National Digital Forecast Database

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation