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.

Light Snow

19°F

-7°C

Humidity 59%
Wind Speed SE 6 mph
Barometer 29.98 in (1017.9 mb)
Dewpoint 7°F (-14°C)
Visibility 9.00 mi
Wind Chill11°F (-12°C)
Last update 26 Dec 3:56 pm EST
Extended Forecast for

Upper Mongaup NY

Winter Storm Warning until December 27, 07:00am
Click here for hazard details and duration
Winter Storm Warning
  •  
    Winter Storm Warning until December 27, 07:00am

    NOW until 7:00am Sat

    Winter Storm Warning

  • This Afternoon

    High: 23 °F

    Heavy Snow

  • Tonight

    Tonight: Snow, mainly before 3am. The snow could be heavy at times. Low around 17. Southeast wind around 6 mph. Chance of precipitation is 100%. New snow accumulation of around 5 inches.

    Low: 17 °F

    Heavy Snow

  • Saturday

    Saturday: Cloudy, then gradually becoming mostly sunny, with a high near 29. Northeast wind around 6 mph becoming calm in the morning.

    High: 29 °F

    Decreasing
    Clouds

  • Saturday Night

    Saturday Night: Increasing clouds, with a low around 13. Calm wind.

    Low: 13 °F

    Increasing
    Clouds

  • Sunday

    Sunday: A chance of showers, mainly after 4pm. Mostly cloudy, with a high near 33. Light and variable wind. Chance of precipitation is 40%.

    High: 33 °F

    Mostly Cloudy
    then Chance
    Showers

  • Sunday Night

    Sunday Night: Freezing rain, possibly mixed with rain before 7pm, then freezing rain between 7pm and 1am, then rain showers after 1am. Low around 29. Chance of precipitation is 90%.

    Low: 29 °F

    Rain/Freezing
    Rain

  • Monday

    Monday: Showers, mainly before 1pm. High near 46. Chance of precipitation is 80%.

    High: 46 °F

    Showers

  • Monday Night

    Monday Night: Mostly cloudy, with a low around 20. Breezy.

    Low: 20 °F

    Mostly Cloudy
    then Mostly
    Cloudy and
    Breezy

Detailed Forecast

This Afternoon
Snow likely. The snow could be heavy at times. Cloudy, with a high near 23. Southeast wind around 6 mph. Chance of precipitation is 60%. Total daytime snow accumulation of around 2 inches.
Tonight
Snow, mainly before 3am. The snow could be heavy at times. Low around 17. Southeast wind around 6 mph. Chance of precipitation is 100%. New snow accumulation of around 5 inches.
Saturday
Cloudy, then gradually becoming mostly sunny, with a high near 29. Northeast wind around 6 mph becoming calm in the morning.
Saturday Night
Increasing clouds, with a low around 13. Calm wind.
Sunday
A chance of showers, mainly after 4pm. Mostly cloudy, with a high near 33. Light and variable wind. Chance of precipitation is 40%.
Sunday Night
Freezing rain, possibly mixed with rain before 7pm, then freezing rain between 7pm and 1am, then rain showers after 1am. Low around 29. Chance of precipitation is 90%.
Monday
Showers, mainly before 1pm. High near 46. Chance of precipitation is 80%.
Monday Night
Mostly cloudy, with a low around 20. Breezy.
Tuesday
Mostly cloudy, with a high near 26. Breezy.
Tuesday Night
Mostly cloudy, with a low around 19.
Wednesday
Mostly cloudy, with a high near 29.
Wednesday Night
Mostly cloudy, with a low around 14.
New Year's Day
Partly sunny, with a high near 24.
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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 Dec 26, 2025
Forecast Valid:
4pm EST Dec 26, 2025-6pm EST Jan 1, 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