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.

Fair

37°F

3°C

Humidity 89%
Wind Speed N 3 mph
Barometer 30.01 in (1016.7 mb)
Dewpoint 34°F (1°C)
Visibility 10.00 mi
Last update 10 Mar 6:56 am EDT
Extended Forecast for

Mongaup Valley NY

  • Today

    Today: Patchy fog before 9am. Otherwise, sunny, with a high near 70. Calm wind becoming west 5 to 7 mph in the afternoon.

    High: 70 °F

    Patchy Fog
    then Sunny

  • Tonight

    Tonight: Patchy fog after 4am. Otherwise, partly cloudy, with a low around 47. Calm wind.

    Low: 47 °F

    Partly Cloudy
    then Patchy
    Fog

  • Wednesday

    Wednesday: A slight chance of rain before 11am, then showers likely, mainly after 2pm. Patchy fog before 8am. Otherwise, partly sunny, with a high near 69. Calm wind becoming south 5 to 9 mph in the afternoon. Winds could gust as high as 20 mph. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.

    High: 69 °F

    Slight Chance
    Rain and
    Patchy Fog
    then Showers
    Likely

  • Wednesday Night

    Wednesday Night: Showers and possibly a thunderstorm, mainly before 5am, then rain likely and possibly a thunderstorm after 5am. Low around 37. South wind 7 to 9 mph, with gusts as high as 21 mph. Chance of precipitation is 80%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    Low: 37 °F

    Showers

  • Thursday

    Thursday: Rain likely before 8am, then a chance of showers between 8am and 2pm. Mostly cloudy, with a high near 40. Northwest wind around 14 mph, with gusts as high as 30 mph. Chance of precipitation is 60%.

    High: 40 °F

    Rain Likely

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 23.

    Low: 23 °F

    Partly Cloudy

  • Friday

    Friday: A chance of rain and snow after 2pm. Partly sunny, with a high near 41. Chance of precipitation is 30%.

    High: 41 °F

    Mostly Sunny
    then Chance
    Rain/Snow

  • Friday Night

    Friday Night: A chance of rain and snow before 2am. Mostly cloudy, with a low around 27. Chance of precipitation is 30%.

    Low: 27 °F

    Chance
    Rain/Snow

  • Saturday

    Saturday: Mostly sunny, with a high near 41.

    High: 41 °F

    Mostly Sunny

Detailed Forecast

Today
Patchy fog before 9am. Otherwise, sunny, with a high near 70. Calm wind becoming west 5 to 7 mph in the afternoon.
Tonight
Patchy fog after 4am. Otherwise, partly cloudy, with a low around 47. Calm wind.
Wednesday
A slight chance of rain before 11am, then showers likely, mainly after 2pm. Patchy fog before 8am. Otherwise, partly sunny, with a high near 69. Calm wind becoming south 5 to 9 mph in the afternoon. Winds could gust as high as 20 mph. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.
Wednesday Night
Showers and possibly a thunderstorm, mainly before 5am, then rain likely and possibly a thunderstorm after 5am. Low around 37. South wind 7 to 9 mph, with gusts as high as 21 mph. Chance of precipitation is 80%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Thursday
Rain likely before 8am, then a chance of showers between 8am and 2pm. Mostly cloudy, with a high near 40. Northwest wind around 14 mph, with gusts as high as 30 mph. Chance of precipitation is 60%.
Thursday Night
Partly cloudy, with a low around 23.
Friday
A chance of rain and snow after 2pm. Partly sunny, with a high near 41. Chance of precipitation is 30%.
Friday Night
A chance of rain and snow before 2am. Mostly cloudy, with a low around 27. Chance of precipitation is 30%.
Saturday
Mostly sunny, with a high near 41.
Saturday Night
Mostly cloudy, with a low around 26.
Sunday
A chance of rain. Mostly cloudy, with a high near 47. Chance of precipitation is 30%.
Sunday Night
Rain. Low around 35. Chance of precipitation is 80%.
Monday
Rain and snow. High near 50. Chance of precipitation is 80%.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Mongaup Valley NY
 41.65°N 74.79°W (Elev. 1181 ft)
Last Update:
6:29 am EDT Mar 10, 2026
Forecast Valid:
7am EDT Mar 10, 2026-6pm EDT Mar 16, 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