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Hazardous Weather Conditions

Current conditions at

St Marys Municipal Airport (KOYM)

Lat: 41.41°NLon: 78.5°WElev: 1934ft.

Mostly Cloudy

43°F

6°C

Humidity 87%
Wind Speed N 5 mph
Barometer 30.06 in
Dewpoint 39°F (4°C)
Visibility 10.00 mi
Wind Chill40°F (4°C)
Last update 19 May 11:55 pm EDT
Extended Forecast for

Saint Marys PA

Frost Advisory May 20, 02:00am until May 20, 08:00am
Click here for hazard details and duration
Frost Advisory

  • Overnight

    Overnight: Areas of frost after 4am. Otherwise, mostly clear, with a low around 35. Calm wind.

    Low: 35 °F

    Areas Frost

  • Tuesday

    Tuesday: Mostly sunny, with a high near 66. Northeast wind 3 to 6 mph.

    High: 66 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Showers likely, mainly after 2am. Mostly cloudy, with a low around 46. East wind 5 to 8 mph. Chance of precipitation is 70%. New precipitation amounts between a tenth and quarter of an inch possible.

    Low: 46 °F

    Slight Chance
    Showers then
    Showers
    Likely

  • Wednesday

    Wednesday: Showers. High near 55. Southeast wind 10 to 13 mph, with gusts as high as 25 mph. Chance of precipitation is 100%. New precipitation amounts between three quarters and one inch possible.

    High: 55 °F

    Showers

  • Wednesday Night

    Wednesday Night: Showers, with thunderstorms also possible after 2am. Low around 46. Southeast wind 7 to 9 mph, with gusts as high as 23 mph. Chance of precipitation is 100%. New rainfall amounts between three quarters and one inch possible.

    Low: 46 °F

    Showers

  • Thursday

    Thursday: Showers. High near 55. Chance of precipitation is 90%. New precipitation amounts between a quarter and half of an inch possible.

    High: 55 °F

    Showers

  • Thursday Night

    Thursday Night: Showers likely, mainly before 2am. Mostly cloudy, with a low around 44. Chance of precipitation is 60%.

    Low: 44 °F

    Showers
    Likely

  • Friday

    Friday: Showers, mainly after 8am. High near 53. Chance of precipitation is 80%.

    High: 53 °F

    Showers

  • Friday Night

    Friday Night: Showers, mainly before 8pm. Low around 42. Chance of precipitation is 80%.

    Low: 42 °F

    Showers then
    Chance
    Showers

Detailed Forecast

Overnight
Areas of frost after 4am. Otherwise, mostly clear, with a low around 35. Calm wind.
Tuesday
Mostly sunny, with a high near 66. Northeast wind 3 to 6 mph.
Tuesday Night
Showers likely, mainly after 2am. Mostly cloudy, with a low around 46. East wind 5 to 8 mph. Chance of precipitation is 70%. New precipitation amounts between a tenth and quarter of an inch possible.
Wednesday
Showers. High near 55. Southeast wind 10 to 13 mph, with gusts as high as 25 mph. Chance of precipitation is 100%. New precipitation amounts between three quarters and one inch possible.
Wednesday Night
Showers, with thunderstorms also possible after 2am. Low around 46. Southeast wind 7 to 9 mph, with gusts as high as 23 mph. Chance of precipitation is 100%. New rainfall amounts between three quarters and one inch possible.
Thursday
Showers. High near 55. Chance of precipitation is 90%. New precipitation amounts between a quarter and half of an inch possible.
Thursday Night
Showers likely, mainly before 2am. Mostly cloudy, with a low around 44. Chance of precipitation is 60%.
Friday
Showers, mainly after 8am. High near 53. Chance of precipitation is 80%.
Friday Night
Showers, mainly before 8pm. Low around 42. Chance of precipitation is 80%.
Saturday
A chance of showers after 8am. Mostly cloudy, with a high near 57. Chance of precipitation is 50%.
Saturday Night
Partly cloudy, with a low around 41.
Sunday
A chance of showers. Partly sunny, with a high near 64. Chance of precipitation is 30%.
Sunday Night
A chance of showers. Partly cloudy, with a low around 42. Chance of precipitation is 30%.
Memorial Day
A chance of showers. Mostly sunny, with a high near 68. Chance of precipitation is 30%.
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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:
11:19 pm EDT May 19, 2025
Forecast Valid:
12am EDT May 20, 2025-6pm EDT May 26, 2025
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

National Digital Forecast Database

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation