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

27°F

-3°C

Humidity 80%
Wind Speed Calm
Barometer 29.91 in
Dewpoint 21°F (-6°C)
Visibility 10.00 mi
Last update 5 Dec 8:15 pm EST
Extended Forecast for

2 Miles ENE Brockport PA

  • Tonight

    Tonight: Cloudy, with a low around 23. Calm wind becoming southwest around 6 mph after midnight.

    Low: 23 °F

    Cloudy

  • Saturday

    Saturday: Cloudy, with a high near 35. Southwest wind 7 to 10 mph, with gusts as high as 21 mph.

    High: 35 °F

    Cloudy

  • Saturday Night

    Saturday Night: A slight chance of snow showers after 1am. Mostly cloudy, with a low around 23. West wind around 6 mph becoming calm in the evening. Chance of precipitation is 20%.

    Low: 23 °F

    Mostly Cloudy
    then Slight
    Chance Snow
    Showers

  • Sunday

    Sunday: A chance of snow showers after 1pm. Mostly cloudy, with a high near 34. Calm wind becoming southwest 5 to 7 mph in the afternoon. Chance of precipitation is 40%.

    High: 34 °F

    Mostly Cloudy
    then Chance
    Snow Showers

  • Sunday Night

    Sunday Night: A chance of snow showers. Mostly cloudy, with a low around 14. West wind around 6 mph becoming northwest after midnight. Chance of precipitation is 50%. New snow accumulation of less than one inch possible.

    Low: 14 °F

    Chance Snow
    Showers

  • Monday

    Monday: Mostly sunny, with a high near 24.

    High: 24 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 8.

    Low: 8 °F

    Partly Cloudy

  • Tuesday

    Tuesday: A chance of snow showers. Mostly cloudy, with a high near 31. Chance of precipitation is 50%.

    High: 31 °F

    Chance Snow
    Showers

  • Tuesday Night

    Tuesday Night: Snow showers likely, mainly after 1am. Mostly cloudy, with a low around 25. Chance of precipitation is 60%.

    Low: 25 °F

    Chance Snow
    Showers then
    Snow Showers
    Likely

Detailed Forecast

Tonight
Cloudy, with a low around 23. Calm wind becoming southwest around 6 mph after midnight.
Saturday
Cloudy, with a high near 35. Southwest wind 7 to 10 mph, with gusts as high as 21 mph.
Saturday Night
A slight chance of snow showers after 1am. Mostly cloudy, with a low around 23. West wind around 6 mph becoming calm in the evening. Chance of precipitation is 20%.
Sunday
A chance of snow showers after 1pm. Mostly cloudy, with a high near 34. Calm wind becoming southwest 5 to 7 mph in the afternoon. Chance of precipitation is 40%.
Sunday Night
A chance of snow showers. Mostly cloudy, with a low around 14. West wind around 6 mph becoming northwest after midnight. Chance of precipitation is 50%. New snow accumulation of less than one inch possible.
Monday
Mostly sunny, with a high near 24.
Monday Night
Partly cloudy, with a low around 8.
Tuesday
A chance of snow showers. Mostly cloudy, with a high near 31. Chance of precipitation is 50%.
Tuesday Night
Snow showers likely, mainly after 1am. Mostly cloudy, with a low around 25. Chance of precipitation is 60%.
Wednesday
Rain and snow showers. High near 38. Chance of precipitation is 80%.
Wednesday Night
Rain and snow showers. Low around 24. Chance of precipitation is 90%.
Thursday
Snow showers likely. Mostly cloudy, with a high near 33. Chance of precipitation is 60%.
Thursday Night
Snow showers likely. Mostly cloudy, with a low around 17. Chance of precipitation is 60%.
Friday
A chance of snow showers. Mostly cloudy, with a high near 27. Chance of precipitation is 50%.
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Forecast Area
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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:
7:26 pm EST Dec 5, 2025
Forecast Valid:
8pm EST Dec 5, 2025-6pm EST Dec 12, 2025
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

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