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.

Mostly Cloudy

14°F

-10°C

Humidity 79%
Wind Speed Calm
Barometer 30.21 in
Dewpoint 9°F (-13°C)
Visibility 10.00 mi
Last update 4 Dec 11:15 pm EST
Extended Forecast for

2 Miles ENE Brockport PA

  • Tonight

    Tonight: Partly cloudy, with a low around 7. Calm wind.

    Low: 7 °F

    Partly Cloudy

  • Friday

    Friday: Increasing clouds, with a high near 29. Wind chill values as low as zero. South wind 5 to 7 mph.

    High: 29 °F

    Increasing
    Clouds

  • Friday Night

    Friday Night: Mostly cloudy, with a low around 20. Calm wind becoming southwest around 5 mph after midnight.

    Low: 20 °F

    Mostly Cloudy

  • Saturday

    Saturday: Mostly cloudy, with a high near 35. Southwest wind 6 to 10 mph, with gusts as high as 20 mph.

    High: 35 °F

    Mostly 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 after 1pm. Mostly cloudy, with a high near 34. Chance of precipitation is 40%.

    High: 34 °F

    Mostly Cloudy
    then Chance
    Snow

  • Sunday Night

    Sunday Night: A chance of snow before 1am, then a chance of snow showers after 1am. Mostly cloudy, with a low around 15. Chance of precipitation is 50%.

    Low: 15 °F

    Chance Snow

  • Monday

    Monday: Mostly sunny, with a high near 24.

    High: 24 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 9.

    Low: 9 °F

    Partly Cloudy

Detailed Forecast

Tonight
Partly cloudy, with a low around 7. Calm wind.
Friday
Increasing clouds, with a high near 29. Wind chill values as low as zero. South wind 5 to 7 mph.
Friday Night
Mostly cloudy, with a low around 20. Calm wind becoming southwest around 5 mph after midnight.
Saturday
Mostly cloudy, with a high near 35. Southwest wind 6 to 10 mph, with gusts as high as 20 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 after 1pm. Mostly cloudy, with a high near 34. Chance of precipitation is 40%.
Sunday Night
A chance of snow before 1am, then a chance of snow showers after 1am. Mostly cloudy, with a low around 15. Chance of precipitation is 50%.
Monday
Mostly sunny, with a high near 24.
Monday Night
Partly cloudy, with a low around 9.
Tuesday
Snow showers likely, mainly after 1pm. Mostly cloudy, with a high near 31. Chance of precipitation is 70%.
Tuesday Night
Snow showers likely. Cloudy, with a low around 23. Chance of precipitation is 70%.
Wednesday
Snow showers likely. Mostly cloudy, with a high near 36. Chance of precipitation is 70%.
Wednesday Night
Rain and snow showers. Low around 24. Chance of precipitation is 90%.
Thursday
Snow showers likely. Mostly cloudy, with a high near 32. Chance of precipitation is 70%.
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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:
7:07 pm EST Dec 4, 2025
Forecast Valid:
11pm EST Dec 4, 2025-6pm EST Dec 11, 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