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.

Fair

39°F

4°C

Humidity 50%
Wind Speed S 8 mph
Barometer 30.04 in (1019.2 mb)
Dewpoint 22°F (-6°C)
Visibility 10.00 mi
Wind Chill33°F (1°C)
Last update 27 Feb 5:56 pm EST
Extended Forecast for

Tennanah Lake NY

  • Tonight

    Tonight: Partly cloudy, with a low around 26. South wind 6 to 9 mph.

    Low: 26 °F

    Partly Cloudy

  • Saturday

    Saturday: Mostly cloudy, then gradually becoming sunny, with a high near 43. South wind 6 to 9 mph becoming northwest in the afternoon.

    High: 43 °F

    Decreasing
    Clouds

  • Saturday Night

    Saturday Night: A slight chance of snow after 1am. Increasing clouds, with a low around 22. North wind around 6 mph. Chance of precipitation is 20%.

    Low: 22 °F

    Partly Cloudy
    then Slight
    Chance Snow

  • Sunday

    Sunday: A chance of snow before 1pm. Mostly cloudy, with a high near 27. Northwest wind 8 to 11 mph. Chance of precipitation is 40%. New snow accumulation of around an inch possible.

    High: 27 °F

    Chance Snow

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 5. Northwest wind 8 to 11 mph.

    Low: 5 °F

    Partly Cloudy

  • Monday

    Monday: Mostly sunny, with a high near 21.

    High: 21 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 8.

    Low: 8 °F

    Partly Cloudy

  • Tuesday

    Tuesday: A chance of snow before 1pm, then rain and snow likely. Mostly cloudy, with a high near 33. Chance of precipitation is 60%.

    High: 33 °F

    Chance Snow
    then
    Rain/Snow
    Likely

  • Tuesday Night

    Tuesday Night: Rain and snow likely, mainly before 1am. Cloudy, with a low around 27. Chance of precipitation is 60%.

    Low: 27 °F

    Rain/Snow
    Likely

Detailed Forecast

Tonight
Partly cloudy, with a low around 26. South wind 6 to 9 mph.
Saturday
Mostly cloudy, then gradually becoming sunny, with a high near 43. South wind 6 to 9 mph becoming northwest in the afternoon.
Saturday Night
A slight chance of snow after 1am. Increasing clouds, with a low around 22. North wind around 6 mph. Chance of precipitation is 20%.
Sunday
A chance of snow before 1pm. Mostly cloudy, with a high near 27. Northwest wind 8 to 11 mph. Chance of precipitation is 40%. New snow accumulation of around an inch possible.
Sunday Night
Partly cloudy, with a low around 5. Northwest wind 8 to 11 mph.
Monday
Mostly sunny, with a high near 21.
Monday Night
Partly cloudy, with a low around 8.
Tuesday
A chance of snow before 1pm, then rain and snow likely. Mostly cloudy, with a high near 33. Chance of precipitation is 60%.
Tuesday Night
Rain and snow likely, mainly before 1am. Cloudy, with a low around 27. Chance of precipitation is 60%.
Wednesday
Mostly cloudy, with a high near 41.
Wednesday Night
A chance of rain. Mostly cloudy, with a low around 28. Chance of precipitation is 30%.
Thursday
Rain likely. Mostly cloudy, with a high near 42. Chance of precipitation is 60%.
Thursday Night
Rain or freezing rain likely. Cloudy, with a low around 34. Chance of precipitation is 70%.
Friday
A chance of rain or freezing rain. Mostly cloudy, with a high near 42. Chance of precipitation is 50%.
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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:
6:14 pm EST Feb 27, 2026
Forecast Valid:
6pm EST Feb 27, 2026-6pm EST Mar 6, 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