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

17°F

-8°C

Humidity 59%
Wind Speed NW 13 G 18 mph
Barometer 30.10 in (1021.8 mb)
Dewpoint 5°F (-15°C)
Visibility 10.00 mi
Wind Chill3°F (-16°C)
Last update 23 Jan 4:56 pm EST
Extended Forecast for

Tennanah Lake NY

Cold Weather Advisory January 23, 07:00pm until January 24, 10:00am
Winter Storm Warning January 25, 01:00am until January 26, 07:00pm
Click here for hazard details and duration
Cold Weather Advisory
Winter Storm Warning

  • Tonight

    Tonight: Mostly cloudy, with a low around -4. Wind chill values as low as -22. Northwest wind 13 to 15 mph.

    Low: -4 °F

    Mostly Cloudy

  • Saturday

    Saturday: Increasing clouds and cold, with a high near 6. Wind chill values as low as -22. Northwest wind 8 to 11 mph.

    High: 6 °F

    Cold

  • Saturday Night

    Saturday Night: A chance of snow after 1am. Mostly cloudy, with a low around 2. Wind chill values as low as -11. North wind 5 to 7 mph becoming northeast after midnight. Chance of precipitation is 30%. New snow accumulation of less than a half inch possible.

    Low: 2 °F

    Mostly Cloudy
    then Chance
    Snow

  • Sunday

    Sunday: Snow. The snow could be heavy at times. High near 13. Wind chill values as low as -7. East wind 6 to 8 mph. Chance of precipitation is 100%. New snow accumulation of around 8 inches.

    High: 13 °F

    Heavy Snow

  • Sunday Night

    Sunday Night: Snow. The snow could be heavy at times. Low around 9. East wind 8 to 10 mph. Chance of precipitation is 100%.

    Low: 9 °F

    Heavy Snow

  • Monday

    Monday: Snow likely, mainly before 1pm. Mostly cloudy, with a high near 18. Chance of precipitation is 70%.

    High: 18 °F

    Snow Likely

  • Monday Night

    Monday Night: Mostly cloudy, with a low around 0.

    Low: 0 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: Partly sunny, with a high near 12.

    High: 12 °F

    Partly Sunny

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around -2.

    Low: -2 °F

    Mostly Cloudy

Detailed Forecast

Tonight
Mostly cloudy, with a low around -4. Wind chill values as low as -22. Northwest wind 13 to 15 mph.
Saturday
Increasing clouds and cold, with a high near 6. Wind chill values as low as -22. Northwest wind 8 to 11 mph.
Saturday Night
A chance of snow after 1am. Mostly cloudy, with a low around 2. Wind chill values as low as -11. North wind 5 to 7 mph becoming northeast after midnight. Chance of precipitation is 30%. New snow accumulation of less than a half inch possible.
Sunday
Snow. The snow could be heavy at times. High near 13. Wind chill values as low as -7. East wind 6 to 8 mph. Chance of precipitation is 100%. New snow accumulation of around 8 inches.
Sunday Night
Snow. The snow could be heavy at times. Low around 9. East wind 8 to 10 mph. Chance of precipitation is 100%.
Monday
Snow likely, mainly before 1pm. Mostly cloudy, with a high near 18. Chance of precipitation is 70%.
Monday Night
Mostly cloudy, with a low around 0.
Tuesday
Partly sunny, with a high near 12.
Tuesday Night
Mostly cloudy, with a low around -2.
Wednesday
Mostly sunny, with a high near 14.
Wednesday Night
Mostly cloudy, with a low around -1.
Thursday
Mostly cloudy, with a high near 11.
Thursday Night
Mostly cloudy, with a low around -1.
Friday
Partly sunny, with a high near 12.
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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:
3:22 pm EST Jan 23, 2026
Forecast Valid:
5pm EST Jan 23, 2026-6pm EST Jan 30, 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