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.

Mostly Cloudy and Breezy

12°F

-11°C

Humidity 67%
Wind Speed NW 23 G 29 mph
Barometer 30.16 in (1023.9 mb)
Dewpoint 3°F (-16°C)
Visibility 10.00 mi
Wind Chill-7°F (-22°C)
Last update 23 Jan 5:56 pm EST
Extended Forecast for

Upper Mongaup 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: Partly cloudy, with a low around 0. Wind chill values as low as -14. Northwest wind 9 to 14 mph, with gusts as high as 25 mph.

    Low: 0 °F

    Partly Cloudy

  • Saturday

    Saturday: Increasing clouds, with a high near 11. Wind chill values as low as -14. Northwest wind 6 to 8 mph.

    High: 11 °F

    Increasing
    Clouds

  • Saturday Night

    Saturday Night: A chance of snow after 1am. Cloudy, with a low around 4. Light north wind. Chance of precipitation is 30%. New snow accumulation of less than a half inch possible.

    Low: 4 °F

    Mostly Cloudy
    then Chance
    Snow

  • Sunday

    Sunday: Snow. The snow could be heavy at times. High near 15. Wind chill values as low as -3. East wind 5 to 8 mph. Chance of precipitation is 100%. New snow accumulation of around 9 inches.

    High: 15 °F

    Heavy Snow

  • Sunday Night

    Sunday Night: Snow. The snow could be heavy at times. Low around 9. East wind 7 to 10 mph, with gusts as high as 20 mph. Chance of precipitation is 100%.

    Low: 9 °F

    Heavy Snow

  • Monday

    Monday: A chance of snow. Mostly cloudy, with a high near 22. Chance of precipitation is 50%.

    High: 22 °F

    Chance Snow

  • Monday Night

    Monday Night: Mostly cloudy, with a low around 3.

    Low: 3 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: Mostly sunny, with a high near 15.

    High: 15 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 0.

    Low: 0 °F

    Partly Cloudy

Detailed Forecast

Tonight
Partly cloudy, with a low around 0. Wind chill values as low as -14. Northwest wind 9 to 14 mph, with gusts as high as 25 mph.
Saturday
Increasing clouds, with a high near 11. Wind chill values as low as -14. Northwest wind 6 to 8 mph.
Saturday Night
A chance of snow after 1am. Cloudy, with a low around 4. Light north wind. 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 15. Wind chill values as low as -3. East wind 5 to 8 mph. Chance of precipitation is 100%. New snow accumulation of around 9 inches.
Sunday Night
Snow. The snow could be heavy at times. Low around 9. East wind 7 to 10 mph, with gusts as high as 20 mph. Chance of precipitation is 100%.
Monday
A chance of snow. Mostly cloudy, with a high near 22. Chance of precipitation is 50%.
Monday Night
Mostly cloudy, with a low around 3.
Tuesday
Mostly sunny, with a high near 15.
Tuesday Night
Partly cloudy, with a low around 0.
Wednesday
Mostly sunny, with a high near 19.
Wednesday Night
Mostly cloudy, with a low around 0.
Thursday
Mostly cloudy, with a high near 15.
Thursday Night
Mostly cloudy, with a low around 2.
Friday
Partly sunny, with a high near 16.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Upper Mongaup NY
 41.47°N 74.8°W (Elev. 1224 ft)
Last Update:
3:22 pm EST Jan 23, 2026
Forecast Valid:
6pm 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