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

Hazardous Weather Conditions

Current conditions at

Monticello, Sullivan County International Airport (KMSV)

Lat: 41.7°NLon: 74.8°WElev: 1404ft.

Partly Cloudy

11°F

-12°C

Humidity 84%
Wind Speed W 6 mph
Barometer 30.01 in (1019.6 mb)
Dewpoint 7°F (-14°C)
Visibility 10.00 mi
Wind Chill1°F (-17°C)
Last update 29 Jan 5:56 pm EST
Extended Forecast for

Tennanah Lake NY

Cold Weather Advisory January 29, 07:00pm until February 1, 09:00am
Click here for hazard details and duration
Cold Weather Advisory

  • Tonight

    Tonight: A slight chance of flurries before 11pm. Partly cloudy, with a low around -8. Wind chill values as low as -25. Northwest wind around 11 mph.

    Low: -8 °F

    Slight Chance
    Flurries

  • Friday

    Friday: Mostly sunny and cold, with a high near 6. Wind chill values as low as -26. Northwest wind around 10 mph, with gusts as high as 21 mph.

    High: 6 °F

    Cold

  • Friday Night

    Friday Night: Mostly cloudy, with a low around -10. Wind chill values as low as -20. Northwest wind 5 to 9 mph.

    Low: -10 °F

    Mostly Cloudy

  • Saturday

    Saturday: Mostly sunny, with a high near 12. Wind chill values as low as -22. Northwest wind 5 to 8 mph.

    High: 12 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: Mostly cloudy, with a low around -3. North wind around 10 mph.

    Low: -3 °F

    Mostly Cloudy

  • Sunday

    Sunday: Partly sunny, with a high near 14.

    High: 14 °F

    Partly Sunny

  • Sunday Night

    Sunday Night: Mostly cloudy, with a low around 4.

    Low: 4 °F

    Mostly Cloudy

  • Monday

    Monday: Mostly sunny, with a high near 22.

    High: 22 °F

    Mostly Sunny

  • Monday Night

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

    Low: 8 °F

    Mostly Cloudy

Detailed Forecast

Tonight
A slight chance of flurries before 11pm. Partly cloudy, with a low around -8. Wind chill values as low as -25. Northwest wind around 11 mph.
Friday
Mostly sunny and cold, with a high near 6. Wind chill values as low as -26. Northwest wind around 10 mph, with gusts as high as 21 mph.
Friday Night
Mostly cloudy, with a low around -10. Wind chill values as low as -20. Northwest wind 5 to 9 mph.
Saturday
Mostly sunny, with a high near 12. Wind chill values as low as -22. Northwest wind 5 to 8 mph.
Saturday Night
Mostly cloudy, with a low around -3. North wind around 10 mph.
Sunday
Partly sunny, with a high near 14.
Sunday Night
Mostly cloudy, with a low around 4.
Monday
Mostly sunny, with a high near 22.
Monday Night
Mostly cloudy, with a low around 8.
Tuesday
Partly sunny, with a high near 23.
Tuesday Night
Mostly cloudy, with a low around 8.
Wednesday
Partly sunny, with a high near 21.
Wednesday Night
A chance of snow showers. Mostly cloudy, with a low around 5. Chance of precipitation is 30%.
Thursday
A chance of snow showers. Partly sunny, with a high near 21. Chance of precipitation is 30%.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Tennanah Lake NY
 41.88°N 74.95°W (Elev. 2280 ft)
Last Update:
5:55 pm EST Jan 29, 2026
Forecast Valid:
6pm EST Jan 29, 2026-6pm EST Feb 5, 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