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.

Fair

34°F

1°C

Humidity 93%
Wind Speed Calm
Barometer 29.90 in
Dewpoint 32°F (0°C)
Visibility 10.00 mi
Last update 15 Nov 2:55 am EST
Extended Forecast for

2 Miles ENE Brockport PA

  • Overnight

    Overnight: Patchy fog. Otherwise, mostly cloudy, with a low around 30. Calm wind.

    Low: 30 °F

    Patchy Fog

  • Saturday

    Saturday: Showers likely, then showers and possibly a thunderstorm after 4pm. Patchy fog before 7am. High near 58. Light southwest wind increasing to 5 to 10 mph in the morning. Winds could gust as high as 22 mph. Chance of precipitation is 90%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    High: 58 °F

    Slight Chance
    Showers and
    Patchy Fog
    then Showers

  • Saturday Night

    Saturday Night: Showers and thunderstorms before 11pm, then a chance of showers between 11pm and 3am. Low around 35. West wind 13 to 16 mph, with gusts as high as 31 mph. Chance of precipitation is 90%. New precipitation amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    Low: 35 °F

    Showers then
    Chance
    Showers

  • Sunday

    Sunday: Snow showers likely before 7am, then snow showers likely, possibly mixed with rain between 7am and 1pm, then snow showers likely after 1pm. Mostly cloudy, with a high near 42. Breezy, with a west wind 16 to 20 mph, with gusts as high as 38 mph. Chance of precipitation is 60%. New snow accumulation of less than a half inch possible.

    High: 42 °F

    Rain/Snow
    Likely and
    Breezy

  • Sunday Night

    Sunday Night: Snow showers likely, mainly before 1am. Mostly cloudy, with a low around 28. West wind around 15 mph, with gusts as high as 30 mph. Chance of precipitation is 60%. New snow accumulation of 1 to 3 inches possible.

    Low: 28 °F

    Snow Showers
    Likely

  • Monday

    Monday: A chance of snow showers, mainly before 1pm. Mostly cloudy, with a high near 38. Chance of precipitation is 40%.

    High: 38 °F

    Chance Snow
    Showers

  • Monday Night

    Monday Night: Mostly cloudy, with a low around 26.

    Low: 26 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: A chance of rain and snow after 1pm. Mostly cloudy, with a high near 41. Chance of precipitation is 30%.

    High: 41 °F

    Partly Sunny
    then Chance
    Rain/Snow

  • Tuesday Night

    Tuesday Night: A chance of rain before 1am, then a chance of freezing rain. Mostly cloudy, with a low around 26. Chance of precipitation is 40%.

    Low: 26 °F

    Chance Rain
    then Chance
    Rain/Freezing
    Rain

Detailed Forecast

Overnight
Patchy fog. Otherwise, mostly cloudy, with a low around 30. Calm wind.
Saturday
Showers likely, then showers and possibly a thunderstorm after 4pm. Patchy fog before 7am. High near 58. Light southwest wind increasing to 5 to 10 mph in the morning. Winds could gust as high as 22 mph. Chance of precipitation is 90%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Saturday Night
Showers and thunderstorms before 11pm, then a chance of showers between 11pm and 3am. Low around 35. West wind 13 to 16 mph, with gusts as high as 31 mph. Chance of precipitation is 90%. New precipitation amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Sunday
Snow showers likely before 7am, then snow showers likely, possibly mixed with rain between 7am and 1pm, then snow showers likely after 1pm. Mostly cloudy, with a high near 42. Breezy, with a west wind 16 to 20 mph, with gusts as high as 38 mph. Chance of precipitation is 60%. New snow accumulation of less than a half inch possible.
Sunday Night
Snow showers likely, mainly before 1am. Mostly cloudy, with a low around 28. West wind around 15 mph, with gusts as high as 30 mph. Chance of precipitation is 60%. New snow accumulation of 1 to 3 inches possible.
Monday
A chance of snow showers, mainly before 1pm. Mostly cloudy, with a high near 38. Chance of precipitation is 40%.
Monday Night
Mostly cloudy, with a low around 26.
Tuesday
A chance of rain and snow after 1pm. Mostly cloudy, with a high near 41. Chance of precipitation is 30%.
Tuesday Night
A chance of rain before 1am, then a chance of freezing rain. Mostly cloudy, with a low around 26. Chance of precipitation is 40%.
Wednesday
Partly sunny, with a high near 45.
Wednesday Night
A chance of rain. Mostly cloudy, with a low around 31. Chance of precipitation is 30%.
Thursday
A chance of rain. Mostly cloudy, with a high near 51. Chance of precipitation is 40%.
Thursday Night
Rain likely. Mostly cloudy, with a low around 36. Chance of precipitation is 70%.
Friday
Rain likely. Mostly cloudy, with a high near 52. Chance of precipitation is 70%.
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ABOUT THIS FORECAST

 
Point Forecast:
2 Miles ENE Brockport PA
 41.29°N 78.69°W (Elev. 1585 ft)
Last Update:
2:46 am EST Nov 15, 2025
Forecast Valid:
3am EST Nov 15, 2025-6pm EST Nov 21, 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