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

Monticello, Sullivan County International Airport (KMSV)

Lat: 41.7°NLon: 74.8°WElev: 1404ft.

Overcast

37°F

3°C

Humidity 67%
Wind Speed SW 6 mph
Barometer 29.53 in (1001.8 mb)
Dewpoint 27°F (-3°C)
Visibility 10.00 mi
Wind Chill32°F (0°C)
Last update 25 Feb 2:56 pm EST
Extended Forecast for

Tennanah Lake NY

  • This Afternoon

    This Afternoon: Partly sunny, with a high near 34. Southwest wind around 10 mph.

    High: 34 °F

    Partly Sunny

  • Tonight

    Tonight: A chance of snow showers, mainly before midnight. Mostly cloudy, then gradually becoming mostly clear, with a low around 18. Southwest wind around 10 mph becoming northwest after midnight. Chance of precipitation is 50%. New snow accumulation of less than a half inch possible.

    Low: 18 °F

    Chance Snow
    Showers then
    Slight Chance
    Snow Showers

  • Thursday

    Thursday: Mostly sunny, with a high near 29. West wind around 7 mph.

    High: 29 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 13. North wind 3 to 6 mph.

    Low: 13 °F

    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 38. Light and variable wind becoming south 5 to 7 mph in the afternoon.

    High: 38 °F

    Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 25.

    Low: 25 °F

    Mostly Clear

  • Saturday

    Saturday: Mostly sunny, with a high near 41.

    High: 41 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: A chance of snow. Mostly cloudy, with a low around 21. Chance of precipitation is 30%.

    Low: 21 °F

    Chance Snow

  • Sunday

    Sunday: A chance of snow. Mostly cloudy, with a high near 25. Chance of precipitation is 30%.

    High: 25 °F

    Chance Snow

Detailed Forecast

This Afternoon
Partly sunny, with a high near 34. Southwest wind around 10 mph.
Tonight
A chance of snow showers, mainly before midnight. Mostly cloudy, then gradually becoming mostly clear, with a low around 18. Southwest wind around 10 mph becoming northwest after midnight. Chance of precipitation is 50%. New snow accumulation of less than a half inch possible.
Thursday
Mostly sunny, with a high near 29. West wind around 7 mph.
Thursday Night
Mostly clear, with a low around 13. North wind 3 to 6 mph.
Friday
Sunny, with a high near 38. Light and variable wind becoming south 5 to 7 mph in the afternoon.
Friday Night
Mostly clear, with a low around 25.
Saturday
Mostly sunny, with a high near 41.
Saturday Night
A chance of snow. Mostly cloudy, with a low around 21. Chance of precipitation is 30%.
Sunday
A chance of snow. Mostly cloudy, with a high near 25. Chance of precipitation is 30%.
Sunday Night
Mostly cloudy, with a low around 7.
Monday
A chance of snow. Partly sunny, with a high near 19. Chance of precipitation is 30%.
Monday Night
Mostly cloudy, with a low around 4.
Tuesday
A chance of snow. Mostly cloudy, with a high near 27. Chance of precipitation is 40%.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Tennanah Lake NY
 41.88°N 74.95°W (Elev. 2280 ft)
Last Update:
3:22 pm EST Feb 25, 2026
Forecast Valid:
4pm EST Feb 25, 2026-6pm EST Mar 3, 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