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

Cortland County-Chase Field (KN03)

Lat: 42.59°NLon: 76.21°WElev: 1198ft.

Mostly Cloudy

59°F

15°C

Humidity 100%
Wind Speed Calm
Barometer 29.94 in
Dewpoint 59°F (15°C)
Visibility 10.00 mi
Last update 18 Aug 1:15 am EDT
Extended Forecast for

Marathon NY

  • Overnight

    Overnight: Areas of fog before 4am. Otherwise, partly cloudy, with a low around 57. Calm wind.

    Low: 57 °F

    Areas Fog

  • Tuesday

    Tuesday: Areas of fog between 7am and 10am. Otherwise, mostly sunny, with a high near 78. Calm wind becoming northwest 5 to 7 mph in the afternoon.

    High: 78 °F

    Areas Fog
    then Mostly
    Sunny

  • Tuesday Night

    Tuesday Night: Areas of fog after midnight. Otherwise, partly cloudy, with a low around 54. Calm wind.

    Low: 54 °F

    Partly Cloudy
    then Areas
    Fog

  • Wednesday

    Wednesday: A chance of showers and thunderstorms, mainly after 4pm. Areas of fog before 9am. Otherwise, partly sunny, with a high near 80. Calm wind becoming southwest 5 to 8 mph in the afternoon. Chance of precipitation is 30%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    High: 80 °F

    Areas Fog
    then Chance
    T-storms

  • Wednesday Night

    Wednesday Night: A chance of showers and thunderstorms before 8pm, then a slight chance of showers between 8pm and 2am. Mostly cloudy, with a low around 54. Calm wind. Chance of precipitation is 30%.

    Low: 54 °F

    Chance
    T-storms then
    Slight Chance
    Showers

  • Thursday

    Thursday: Mostly sunny, with a high near 76.

    High: 76 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 50.

    Low: 50 °F

    Partly Cloudy

  • Friday

    Friday: Sunny, with a high near 79.

    High: 79 °F

    Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 54.

    Low: 54 °F

    Mostly Clear

Detailed Forecast

Overnight
Areas of fog before 4am. Otherwise, partly cloudy, with a low around 57. Calm wind.
Tuesday
Areas of fog between 7am and 10am. Otherwise, mostly sunny, with a high near 78. Calm wind becoming northwest 5 to 7 mph in the afternoon.
Tuesday Night
Areas of fog after midnight. Otherwise, partly cloudy, with a low around 54. Calm wind.
Wednesday
A chance of showers and thunderstorms, mainly after 4pm. Areas of fog before 9am. Otherwise, partly sunny, with a high near 80. Calm wind becoming southwest 5 to 8 mph in the afternoon. Chance of precipitation is 30%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Wednesday Night
A chance of showers and thunderstorms before 8pm, then a slight chance of showers between 8pm and 2am. Mostly cloudy, with a low around 54. Calm wind. Chance of precipitation is 30%.
Thursday
Mostly sunny, with a high near 76.
Thursday Night
Partly cloudy, with a low around 50.
Friday
Sunny, with a high near 79.
Friday Night
Mostly clear, with a low around 54.
Saturday
A chance of showers after 2pm. Mostly sunny, with a high near 79. Chance of precipitation is 50%.
Saturday Night
Showers likely. Mostly cloudy, with a low around 56. Chance of precipitation is 60%.
Sunday
Showers likely and possibly a thunderstorm. Mostly cloudy, with a high near 76. Chance of precipitation is 70%.
Sunday Night
Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 52. Chance of precipitation is 60%.
Monday
A chance of showers. Partly sunny, with a high near 74. Chance of precipitation is 30%.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Marathon NY
 42.44°N 76.03°W (Elev. 1099 ft)
Last Update:
12:44 am EDT Aug 18, 2026
Forecast Valid:
1am EDT Aug 18, 2026-6pm EDT Aug 24, 2026
 
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