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.

Fair

18°F

-8°C

Humidity 92%
Wind Speed Calm
Barometer 30.01 in (1018.0 mb)
Dewpoint 16°F (-9°C)
Visibility 10.00 mi
Last update 15 Feb 1:56 am EST
Extended Forecast for

Upper Mongaup NY

  • Overnight

    Overnight: Patchy fog. Patchy freezing fog. Otherwise, partly cloudy, with a low around 18. Calm wind.

    Low: 18 °F

    Patchy
    Freezing Fog
    and Patchy
    Fog

  • Sunday

    Sunday: Patchy fog before 9am. Patchy freezing fog before 9am. Otherwise, increasing clouds, with a high near 35. Calm wind becoming southeast around 5 mph in the afternoon.

    High: 35 °F

    Patchy
    Freezing Fog
    and Patchy
    Fog then
    Mostly Cloudy

  • Sunday Night

    Sunday Night: A chance of snow showers, mainly before 2am. Cloudy, with a low around 23. Light east wind. Chance of precipitation is 50%. New snow accumulation of less than one inch possible.

    Low: 23 °F

    Chance Snow
    Showers

  • Washington's Birthday

    Washington's Birthday: Mostly cloudy, with a high near 38. Calm wind.

    High: 38 °F

    Mostly Cloudy

  • Monday Night

    Monday Night: A slight chance of snow showers between 1am and 4am, then a slight chance of freezing rain after 4am. Mostly cloudy, with a low around 28. Calm wind. Chance of precipitation is 20%.

    Low: 28 °F

    Mostly Cloudy
    then Slight
    Chance Wintry
    Mix

  • Tuesday

    Tuesday: Mostly cloudy, with a high near 45.

    High: 45 °F

    Mostly Cloudy

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 27.

    Low: 27 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: Rain, mainly after 1pm. High near 37. Chance of precipitation is 80%.

    High: 37 °F

    Chance Rain
    then Rain

  • Wednesday Night

    Wednesday Night: Rain likely before 1am. Mostly cloudy, with a low around 31. Chance of precipitation is 60%.

    Low: 31 °F

    Rain Likely

Detailed Forecast

Overnight
Patchy fog. Patchy freezing fog. Otherwise, partly cloudy, with a low around 18. Calm wind.
Sunday
Patchy fog before 9am. Patchy freezing fog before 9am. Otherwise, increasing clouds, with a high near 35. Calm wind becoming southeast around 5 mph in the afternoon.
Sunday Night
A chance of snow showers, mainly before 2am. Cloudy, with a low around 23. Light east wind. Chance of precipitation is 50%. New snow accumulation of less than one inch possible.
Washington's Birthday
Mostly cloudy, with a high near 38. Calm wind.
Monday Night
A slight chance of snow showers between 1am and 4am, then a slight chance of freezing rain after 4am. Mostly cloudy, with a low around 28. Calm wind. Chance of precipitation is 20%.
Tuesday
Mostly cloudy, with a high near 45.
Tuesday Night
Mostly cloudy, with a low around 27.
Wednesday
Rain, mainly after 1pm. High near 37. Chance of precipitation is 80%.
Wednesday Night
Rain likely before 1am. Mostly cloudy, with a low around 31. Chance of precipitation is 60%.
Thursday
Partly sunny, with a high near 39.
Thursday Night
A chance of snow. Mostly cloudy, with a low around 28. Chance of precipitation is 30%.
Friday
Rain and snow likely. Mostly cloudy, with a high near 39. Chance of precipitation is 70%.
Friday Night
A chance of rain and snow. Mostly cloudy, with a low around 27. Chance of precipitation is 40%.
Saturday
A chance of snow. Mostly cloudy, with a high near 36. Chance of precipitation is 40%.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Upper Mongaup NY
 41.47°N 74.8°W (Elev. 1224 ft)
Last Update:
12:04 am EST Feb 15, 2026
Forecast Valid:
2am EST Feb 15, 2026-6pm EST Feb 21, 2026
 
Forecast Discussion
 
Get as KML Get as XML

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