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

24°F

-4°C

Humidity 81%
Wind Speed SW 3 mph
Barometer 30.01 in (1017.9 mb)
Dewpoint 19°F (-7°C)
Visibility 10.00 mi
Last update 13 Jan 3:56 am EST
Extended Forecast for

Tennanah Lake NY

  • Today

    Today: Mostly sunny, with a high near 36. South wind 6 to 8 mph.

    High: 36 °F

    Mostly Sunny

  • Tonight

    Tonight: Mostly cloudy, with a low around 32. South wind 8 to 11 mph.

    Low: 32 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: A chance of rain and snow, mainly after 1pm. Mostly cloudy, with a high near 38. Southwest wind around 7 mph. Chance of precipitation is 50%. Little or no snow accumulation expected.

    High: 38 °F

    Slight Chance
    Rain/Snow
    then Chance
    Rain/Snow

  • Wednesday Night

    Wednesday Night: Snow, possibly mixed with rain, becoming all snow after 1am. Low around 16. South wind 7 to 11 mph becoming northwest after midnight. Chance of precipitation is 80%. New snow accumulation of around an inch possible.

    Low: 16 °F

    Rain/Snow

  • Thursday

    Thursday: A chance of snow. Mostly cloudy, with a high near 18. West wind 10 to 14 mph. Chance of precipitation is 30%.

    High: 18 °F

    Chance Snow

  • Thursday Night

    Thursday Night: Mostly cloudy, with a low around 7.

    Low: 7 °F

    Mostly Cloudy

  • Friday

    Friday: Mostly sunny, with a high near 20.

    High: 20 °F

    Mostly Sunny

  • Friday Night

    Friday Night: Mostly cloudy, with a low around 16.

    Low: 16 °F

    Mostly Cloudy

  • Saturday

    Saturday: Mostly sunny, with a high near 30.

    High: 30 °F

    Mostly Sunny

Detailed Forecast

Today
Mostly sunny, with a high near 36. South wind 6 to 8 mph.
Tonight
Mostly cloudy, with a low around 32. South wind 8 to 11 mph.
Wednesday
A chance of rain and snow, mainly after 1pm. Mostly cloudy, with a high near 38. Southwest wind around 7 mph. Chance of precipitation is 50%. Little or no snow accumulation expected.
Wednesday Night
Snow, possibly mixed with rain, becoming all snow after 1am. Low around 16. South wind 7 to 11 mph becoming northwest after midnight. Chance of precipitation is 80%. New snow accumulation of around an inch possible.
Thursday
A chance of snow. Mostly cloudy, with a high near 18. West wind 10 to 14 mph. Chance of precipitation is 30%.
Thursday Night
Mostly cloudy, with a low around 7.
Friday
Mostly sunny, with a high near 20.
Friday Night
Mostly cloudy, with a low around 16.
Saturday
Mostly sunny, with a high near 30.
Saturday Night
Mostly cloudy, with a low around 16.
Sunday
Partly sunny, with a high near 22.
Sunday Night
Mostly cloudy, with a low around 11.
M.L.King Day
Partly sunny, with a high near 19.
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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:
12:33 am EST Jan 13, 2026
Forecast Valid:
4am EST Jan 13, 2026-6pm EST Jan 19, 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