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.

A Few Clouds

29°F

-2°C

Humidity 100%
Wind Speed W 5 mph
Barometer 29.71 in (1007.5 mb)
Dewpoint 29°F (-2°C)
Visibility 10.00 mi
Wind Chill24°F (-4°C)
Last update 26 Feb 2:56 am EST
Extended Forecast for

Mongaup Valley NY

  • Overnight

    Overnight: Partly cloudy, with a low around 19. West wind around 5 mph.

    Low: 19 °F

    Partly Cloudy

  • Thursday

    Thursday: Partly sunny, with a high near 34. West wind 3 to 5 mph.

    High: 34 °F

    Partly Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 12. Calm wind.

    Low: 12 °F

    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 42. Calm wind becoming southwest around 6 mph in the afternoon.

    High: 42 °F

    Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 25. Light south wind.

    Low: 25 °F

    Mostly Clear

  • Saturday

    Saturday: Mostly sunny, with a high near 48.

    High: 48 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: A chance of snow after 1am. Mostly cloudy, with a low around 22. Chance of precipitation is 30%.

    Low: 22 °F

    Mostly Cloudy
    then Chance
    Snow

  • Sunday

    Sunday: A chance of snow before 1pm. Partly sunny, with a high near 30. Chance of precipitation is 30%.

    High: 30 °F

    Chance Snow

  • Sunday Night

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

    Low: 8 °F

    Mostly Cloudy

Detailed Forecast

Overnight
Partly cloudy, with a low around 19. West wind around 5 mph.
Thursday
Partly sunny, with a high near 34. West wind 3 to 5 mph.
Thursday Night
Mostly clear, with a low around 12. Calm wind.
Friday
Sunny, with a high near 42. Calm wind becoming southwest around 6 mph in the afternoon.
Friday Night
Mostly clear, with a low around 25. Light south wind.
Saturday
Mostly sunny, with a high near 48.
Saturday Night
A chance of snow after 1am. Mostly cloudy, with a low around 22. Chance of precipitation is 30%.
Sunday
A chance of snow before 1pm. Partly sunny, with a high near 30. Chance of precipitation is 30%.
Sunday Night
Mostly cloudy, with a low around 8.
Monday
A chance of snow before 1pm. Mostly cloudy, with a high near 23. Chance of precipitation is 30%.
Monday Night
Mostly cloudy, with a low around 7.
Tuesday
A chance of snow. Mostly cloudy, with a high near 31. Chance of precipitation is 30%.
Tuesday Night
A chance of snow. Mostly cloudy, with a low around 20. Chance of precipitation is 50%.
Wednesday
A chance of rain and snow. Mostly sunny, with a high near 40. Chance of precipitation is 30%.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Mongaup Valley NY
 41.65°N 74.79°W (Elev. 1181 ft)
Last Update:
1:34 am EST Feb 26, 2026
Forecast Valid:
3am EST Feb 26, 2026-6pm EST Mar 4, 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