National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Hazardous Weather Conditions

Current conditions at

St Marys Municipal Airport (KOYM)

Lat: 41.41°NLon: 78.5°WElev: 1934ft.

Overcast

72°F

22°C

Humidity 88%
Wind Speed Calm
Barometer 30.11 in
Dewpoint 68°F (20°C)
Visibility 10.00 mi
Last update 14 Jul 1:15 am EDT
Extended Forecast for

2 Miles ENE Brockport PA

  • Overnight

    Overnight: A chance of showers and thunderstorms, mainly before 2am. Patchy fog after 2am. Otherwise, mostly cloudy, with a low around 66. Calm wind. Chance of precipitation is 50%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    Low: 66 °F

    Chance
    T-storms and
    Patchy Fog

  • Monday

    Monday: A chance of showers and thunderstorms, mainly after 11am. Patchy fog before 8am. Otherwise, cloudy, with a high near 82. Calm wind becoming west around 5 mph in the afternoon. Chance of precipitation is 50%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    High: 82 °F

    Chance
    T-storms and
    Patchy Fog

  • Monday Night

    Monday Night: Partly cloudy, with a low around 65. Calm wind.

    Low: 65 °F

    Partly Cloudy

  • Tuesday

    Tuesday: A slight chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 86. Light and variable wind. Chance of precipitation is 20%.

    High: 86 °F

    Mostly Sunny
    then Slight
    Chance
    T-storms

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 67. Calm wind.

    Low: 67 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: A chance of showers before 11am, then a chance of showers and thunderstorms between 11am and 2pm, then showers likely and possibly a thunderstorm after 2pm. Mostly cloudy, with a high near 86. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    High: 86 °F

    Chance
    Showers then
    Showers
    Likely

  • Wednesday Night

    Wednesday Night: Showers likely and possibly a thunderstorm before 8pm, then a chance of showers and thunderstorms between 8pm and 2am. Mostly cloudy, with a low around 68. Chance of precipitation is 60%.

    Low: 68 °F

    Showers
    Likely then
    Chance
    T-storms

  • Thursday

    Thursday: Showers likely and possibly a thunderstorm, mainly after 2pm. Mostly cloudy, with a high near 84. Chance of precipitation is 70%.

    High: 84 °F

    Chance
    Showers then
    Showers
    Likely

  • Thursday Night

    Thursday Night: Showers likely and possibly a thunderstorm before 8pm, then a chance of showers and thunderstorms between 8pm and 2am. Mostly cloudy, with a low around 67. Chance of precipitation is 60%.

    Low: 67 °F

    Showers
    Likely then
    Chance
    T-storms

Detailed Forecast

Overnight
A chance of showers and thunderstorms, mainly before 2am. Patchy fog after 2am. Otherwise, mostly cloudy, with a low around 66. Calm wind. Chance of precipitation is 50%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Monday
A chance of showers and thunderstorms, mainly after 11am. Patchy fog before 8am. Otherwise, cloudy, with a high near 82. Calm wind becoming west around 5 mph in the afternoon. Chance of precipitation is 50%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Monday Night
Partly cloudy, with a low around 65. Calm wind.
Tuesday
A slight chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 86. Light and variable wind. Chance of precipitation is 20%.
Tuesday Night
Mostly cloudy, with a low around 67. Calm wind.
Wednesday
A chance of showers before 11am, then a chance of showers and thunderstorms between 11am and 2pm, then showers likely and possibly a thunderstorm after 2pm. Mostly cloudy, with a high near 86. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Wednesday Night
Showers likely and possibly a thunderstorm before 8pm, then a chance of showers and thunderstorms between 8pm and 2am. Mostly cloudy, with a low around 68. Chance of precipitation is 60%.
Thursday
Showers likely and possibly a thunderstorm, mainly after 2pm. Mostly cloudy, with a high near 84. Chance of precipitation is 70%.
Thursday Night
Showers likely and possibly a thunderstorm before 8pm, then a chance of showers and thunderstorms between 8pm and 2am. Mostly cloudy, with a low around 67. Chance of precipitation is 60%.
Friday
Showers likely, mainly after 2pm. Mostly cloudy, with a high near 82. Chance of precipitation is 60%.
Friday Night
Showers likely. Mostly cloudy, with a low around 65. Chance of precipitation is 60%.
Saturday
A chance of showers. Partly sunny, with a high near 82. Chance of precipitation is 40%.
Saturday Night
Mostly cloudy, with a low around 62.
Sunday
A chance of showers and thunderstorms. Partly sunny, with a high near 83. Chance of precipitation is 40%.
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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:
10:23 pm EDT Jul 13, 2025
Forecast Valid:
1am EDT Jul 14, 2025-6pm EDT Jul 20, 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