Current conditions at

St Marys Municipal Airport (KOYM)

Lat: 41.41°NLon: 78.5°WElev: 1934ft.

Overcast

28°F

-2°C

Humidity 93%
Wind Speed Calm
Barometer 29.85 in
Dewpoint 27°F (-3°C)
Visibility 4.00 mi
Last update 17 Jan 2:15 am EST
Extended Forecast for

2 Miles ENE Brockport PA

Winter Weather Advisory January 17, 02:20am until January 18, 01:00am
Click here for hazard details and duration
Winter Weather Advisory
  •  
    Winter Weather Advisory January 17, 02:20am until January 18, 01:00am

    NOW until 1:00am Sun

    Winter Weather Advisory

  • Overnight

    Low: 26 °F

    Snow

  • Saturday

    Saturday: Snow, mainly before 8am, then a chance of snow showers after 1pm.  High near 36. Southwest wind 6 to 10 mph, with gusts as high as 20 mph.  Chance of precipitation is 80%. New snow accumulation of 1 to 2 inches possible.

    High: 36 °F

    Snow then
    Chance Snow
    Showers

  • Saturday Night

    Saturday Night: A slight chance of snow showers before 11pm.  Mostly cloudy, with a low around 15. West wind around 6 mph.  Chance of precipitation is 20%.

    Low: 15 °F

    Slight Chance
    Snow Showers
    then Mostly
    Cloudy

  • Sunday

    Sunday: Partly sunny, with a high near 21. West wind 6 to 9 mph, with gusts as high as 20 mph.

    High: 21 °F

    Partly Sunny

  • Sunday Night

    Sunday Night: Mostly cloudy, with a low around 14. Southwest wind 5 to 9 mph, with gusts as high as 20 mph.

    Low: 14 °F

    Mostly Cloudy

  • M.L.King Day

    M.L.King Day: A chance of snow showers.  Mostly cloudy, with a high near 22. Chance of precipitation is 40%.

    High: 22 °F

    Chance Snow
    Showers

  • Monday Night

    Monday Night: Mostly cloudy, with a low around 2.

    Low: 2 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: Partly sunny, with a high near 11.

    High: 11 °F

    Partly Sunny

Detailed Forecast

Overnight
Snow, mainly after 4am. Low around 26. South wind around 6 mph. Chance of precipitation is 80%. Total nighttime snow accumulation of 1 to 3 inches possible.
Saturday
Snow, mainly before 8am, then a chance of snow showers after 1pm. High near 36. Southwest wind 6 to 10 mph, with gusts as high as 20 mph. Chance of precipitation is 80%. New snow accumulation of 1 to 2 inches possible.
Saturday Night
A slight chance of snow showers before 11pm. Mostly cloudy, with a low around 15. West wind around 6 mph. Chance of precipitation is 20%.
Sunday
Partly sunny, with a high near 21. West wind 6 to 9 mph, with gusts as high as 20 mph.
Sunday Night
Mostly cloudy, with a low around 14. Southwest wind 5 to 9 mph, with gusts as high as 20 mph.
M.L.King Day
A chance of snow showers. Mostly cloudy, with a high near 22. Chance of precipitation is 40%.
Monday Night
Mostly cloudy, with a low around 2.
Tuesday
Partly sunny, with a high near 11.
Tuesday Night
Partly cloudy, with a low around 5.
Wednesday
A chance of snow showers. Mostly cloudy, with a high near 31. Chance of precipitation is 50%.
Wednesday Night
A chance of snow showers. Mostly cloudy, with a low around 20. Chance of precipitation is 50%.
Thursday
A chance of snow showers. Mostly cloudy, with a high near 26. Chance of precipitation is 40%.
Thursday Night
A chance of snow showers. Mostly cloudy, with a low around 10. Chance of precipitation is 30%.
Friday
Partly sunny, with a high near 23.
Basemap Options
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ABOUT THIS FORECAST

 
Point Forecast:
2 Miles ENE Brockport PA
 41.29°N 78.69°W (Elev. 1585 ft)
1:26 am EST Jan 17, 2026
2am EST Jan 17, 2026-6pm EST Jan 23, 2026
 
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Additional Resources

Radar & Satellite Image

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Hourly Weather Forecast

National Digital Forecast Database