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

32°F

0°C

Humidity 38%
Wind Speed S 8 mph
Barometer 30.26 in (1026.7 mb)
Dewpoint 9°F (-13°C)
Visibility 10.00 mi
Wind Chill25°F (-4°C)
Last update 18 Mar 5:56 pm EDT
Extended Forecast for

Upper Mongaup NY

  • Tonight

    Tonight: Increasing clouds, with a low around 22. South wind around 5 mph becoming calm in the evening.

    Low: 22 °F

    Increasing
    Clouds

  • Thursday

    Thursday: Mostly cloudy, with a high near 42. South wind 3 to 8 mph.

    High: 42 °F

    Mostly Cloudy

  • Thursday Night

    Thursday Night: Mostly cloudy, with a low around 28. Light and variable wind.

    Low: 28 °F

    Mostly Cloudy

  • Friday

    Friday: A chance of rain after 2pm. Partly sunny, with a high near 50. Calm wind becoming south 5 to 7 mph in the afternoon. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch possible.

    High: 50 °F

    Partly Sunny
    then Chance
    Rain

  • Friday Night

    Friday Night: Rain likely, mainly between 8pm and 2am. Mostly cloudy, with a low around 38. South wind around 6 mph. Chance of precipitation is 70%.

    Low: 38 °F

    Rain Likely

  • Saturday

    Saturday: A chance of rain before 8am. Partly sunny, with a high near 54. Chance of precipitation is 30%.

    High: 54 °F

    Chance Rain
    then Partly
    Sunny

  • Saturday Night

    Saturday Night: Mostly cloudy, with a low around 37.

    Low: 37 °F

    Mostly Cloudy

  • Sunday

    Sunday: A chance of rain after 2pm. Partly sunny, with a high near 58. Chance of precipitation is 30%.

    High: 58 °F

    Partly Sunny
    then Chance
    Rain

  • Sunday Night

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

    Low: 30 °F

    Chance Rain

Detailed Forecast

Tonight
Increasing clouds, with a low around 22. South wind around 5 mph becoming calm in the evening.
Thursday
Mostly cloudy, with a high near 42. South wind 3 to 8 mph.
Thursday Night
Mostly cloudy, with a low around 28. Light and variable wind.
Friday
A chance of rain after 2pm. Partly sunny, with a high near 50. Calm wind becoming south 5 to 7 mph in the afternoon. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch possible.
Friday Night
Rain likely, mainly between 8pm and 2am. Mostly cloudy, with a low around 38. South wind around 6 mph. Chance of precipitation is 70%.
Saturday
A chance of rain before 8am. Partly sunny, with a high near 54. Chance of precipitation is 30%.
Saturday Night
Mostly cloudy, with a low around 37.
Sunday
A chance of rain after 2pm. Partly sunny, with a high near 58. Chance of precipitation is 30%.
Sunday Night
A chance of rain before 2am. Mostly cloudy, with a low around 30. Chance of precipitation is 30%.
Monday
Mostly sunny, with a high near 41.
Monday Night
Mostly clear, with a low around 21.
Tuesday
Partly sunny, with a high near 41.
Tuesday Night
Mostly cloudy, with a low around 25.
Wednesday
Partly sunny, with a high near 46.
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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:
6:46 pm EDT Mar 18, 2026
Forecast Valid:
6pm EDT Mar 18, 2026-6pm EDT Mar 25, 2026
 
Forecast Discussion
 
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Additional Resources

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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