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

46°F

8°C

Humidity 44%
Wind Speed NW 8 mph
Barometer 30.34 in (1028.2 mb)
Dewpoint 25°F (-4°C)
Visibility 10.00 mi
Wind Chill42°F (6°C)
Last update 11 Apr 7:56 pm EDT
Extended Forecast for

Upper Mongaup NY

  • Tonight

    Tonight: Clear, with a low around 29. Northwest wind around 6 mph becoming calm after midnight.

    Low: 29 °F

    Clear

  • Sunday

    Sunday: Mostly sunny, with a high near 56. Calm wind becoming south 5 to 9 mph in the afternoon.

    High: 56 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: Mostly cloudy, with a low around 43. South wind around 7 mph.

    Low: 43 °F

    Mostly Cloudy

  • Monday

    Monday: A chance of showers after 2pm. Mostly cloudy, with a high near 73. Southwest wind 7 to 11 mph, with gusts as high as 25 mph. Chance of precipitation is 30%.

    High: 73 °F

    Partly Sunny
    then Chance
    Showers

  • Monday Night

    Monday Night: A chance of showers, mainly before 8pm. Mostly cloudy, with a low around 55. West wind 6 to 9 mph. Chance of precipitation is 30%.

    Low: 55 °F

    Chance
    Showers

  • Tuesday

    Tuesday: A slight chance of showers and thunderstorms after 2pm. Partly sunny, with a high near 78. Chance of precipitation is 20%.

    High: 78 °F

    Partly Sunny
    then Slight
    Chance
    T-storms

  • Tuesday Night

    Tuesday Night: A chance of showers between 8pm and 2am. Mostly cloudy, with a low around 57. Chance of precipitation is 30%.

    Low: 57 °F

    Chance
    Showers

  • Wednesday

    Wednesday: Partly sunny, with a high near 82.

    High: 82 °F

    Partly Sunny

  • Wednesday Night

    Wednesday Night: A chance of showers between 8pm and 2am. Mostly cloudy, with a low around 60. Chance of precipitation is 30%.

    Low: 60 °F

    Chance
    Showers

Detailed Forecast

Tonight
Clear, with a low around 29. Northwest wind around 6 mph becoming calm after midnight.
Sunday
Mostly sunny, with a high near 56. Calm wind becoming south 5 to 9 mph in the afternoon.
Sunday Night
Mostly cloudy, with a low around 43. South wind around 7 mph.
Monday
A chance of showers after 2pm. Mostly cloudy, with a high near 73. Southwest wind 7 to 11 mph, with gusts as high as 25 mph. Chance of precipitation is 30%.
Monday Night
A chance of showers, mainly before 8pm. Mostly cloudy, with a low around 55. West wind 6 to 9 mph. Chance of precipitation is 30%.
Tuesday
A slight chance of showers and thunderstorms after 2pm. Partly sunny, with a high near 78. Chance of precipitation is 20%.
Tuesday Night
A chance of showers between 8pm and 2am. Mostly cloudy, with a low around 57. Chance of precipitation is 30%.
Wednesday
Partly sunny, with a high near 82.
Wednesday Night
A chance of showers between 8pm and 2am. Mostly cloudy, with a low around 60. Chance of precipitation is 30%.
Thursday
Partly sunny, with a high near 78.
Thursday Night
A chance of showers. Mostly cloudy, with a low around 55. Chance of precipitation is 40%.
Friday
A chance of showers. Partly sunny, with a high near 71. Chance of precipitation is 30%.
Friday Night
Partly cloudy, with a low around 51.
Saturday
A chance of showers. Partly sunny, with a high near 71. Chance of precipitation is 30%.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Upper Mongaup NY
 41.47°N 74.8°W (Elev. 1224 ft)
Last Update:
6:28 pm EDT Apr 11, 2026
Forecast Valid:
8pm EDT Apr 11, 2026-6pm EDT Apr 18, 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