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

65°F

18°C

Humidity 56%
Wind Speed SE 16 mph
Barometer 29.91 in (1012.6 mb)
Dewpoint 49°F (9°C)
Visibility 10.00 mi
Last update 18 Apr 5:56 pm EDT
Extended Forecast for

Mongaup Valley NY

  • Tonight

    Tonight: Showers likely, mainly after 5am. Increasing clouds, with a low around 37. Southeast wind 5 to 10 mph. Chance of precipitation is 60%. New precipitation amounts between a tenth and quarter of an inch possible.

    Low: 37 °F

    Mostly Cloudy
    then Showers
    Likely

  • Sunday

    Sunday: Showers, mainly before noon. High near 49. Northwest wind 7 to 11 mph, with gusts as high as 22 mph. Chance of precipitation is 90%. New precipitation amounts between a quarter and half of an inch possible.

    High: 49 °F

    Showers then
    Chance
    Showers

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 28. Northwest wind around 6 mph becoming calm in the evening.

    Low: 28 °F

    Partly Cloudy

  • Monday

    Monday: Mostly sunny, with a high near 42. Northwest wind 6 to 10 mph.

    High: 42 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 21. Northwest wind around 6 mph becoming calm after midnight.

    Low: 21 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 50.

    High: 50 °F

    Sunny

  • Tuesday Night

    Tuesday Night: A chance of showers before 2am. Mostly cloudy, with a low around 34. Chance of precipitation is 30%.

    Low: 34 °F

    Chance
    Showers

  • Wednesday

    Wednesday: Mostly cloudy, with a high near 58.

    High: 58 °F

    Mostly Cloudy

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 33.

    Low: 33 °F

    Partly Cloudy

Detailed Forecast

Tonight
Showers likely, mainly after 5am. Increasing clouds, with a low around 37. Southeast wind 5 to 10 mph. Chance of precipitation is 60%. New precipitation amounts between a tenth and quarter of an inch possible.
Sunday
Showers, mainly before noon. High near 49. Northwest wind 7 to 11 mph, with gusts as high as 22 mph. Chance of precipitation is 90%. New precipitation amounts between a quarter and half of an inch possible.
Sunday Night
Partly cloudy, with a low around 28. Northwest wind around 6 mph becoming calm in the evening.
Monday
Mostly sunny, with a high near 42. Northwest wind 6 to 10 mph.
Monday Night
Mostly clear, with a low around 21. Northwest wind around 6 mph becoming calm after midnight.
Tuesday
Sunny, with a high near 50.
Tuesday Night
A chance of showers before 2am. Mostly cloudy, with a low around 34. Chance of precipitation is 30%.
Wednesday
Mostly cloudy, with a high near 58.
Wednesday Night
Partly cloudy, with a low around 33.
Thursday
Mostly sunny, with a high near 65.
Thursday Night
Partly cloudy, with a low around 39.
Friday
Mostly sunny, with a high near 67.
Friday Night
Partly cloudy, with a low around 42.
Saturday
A chance of showers. Partly sunny, with a high near 62. Chance of precipitation is 40%.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Mongaup Valley NY
 41.65°N 74.79°W (Elev. 1181 ft)
Last Update:
2:30 pm EDT Apr 18, 2026
Forecast Valid:
6pm EDT Apr 18, 2026-6pm EDT Apr 25, 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