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

28°F

-2°C

Humidity 96%
Wind Speed W 3 mph
Barometer 30.05 in (1019.1 mb)
Dewpoint 27°F (-3°C)
Visibility 10.00 mi
Last update 20 Apr 1:56 am EDT
Extended Forecast for

Upper Mongaup NY

  • Overnight

    Overnight: Mostly clear, with a low around 28. Calm wind.

    Low: 28 °F

    Mostly Clear

  • Monday

    Monday: Isolated snow showers between 8am and 9am. Mostly sunny, with a high near 42. Northwest wind 7 to 11 mph, with gusts as high as 21 mph. Chance of precipitation is 20%.

    High: 42 °F

    Isolated Snow
    Showers then
    Mostly Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 22. Northwest wind 3 to 7 mph.

    Low: 22 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 50. Calm wind becoming southwest around 6 mph in the afternoon.

    High: 50 °F

    Sunny

  • Tuesday Night

    Tuesday Night: A chance of rain showers before 2am, then a chance of rain and snow showers. Mostly cloudy, with a low around 35. South wind 3 to 5 mph. Chance of precipitation is 40%.

    Low: 35 °F

    Chance
    Showers then
    Chance
    Rain/Snow

  • Wednesday

    Wednesday: A chance of snow showers before 8am. Partly sunny, with a high near 57. Chance of precipitation is 30%.

    High: 57 °F

    Chance Snow
    Showers then
    Partly Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 37.

    Low: 37 °F

    Partly Cloudy

  • Thursday

    Thursday: Mostly sunny, with a high near 65.

    High: 65 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 40.

    Low: 40 °F

    Partly Cloudy

Detailed Forecast

Overnight
Mostly clear, with a low around 28. Calm wind.
Monday
Isolated snow showers between 8am and 9am. Mostly sunny, with a high near 42. Northwest wind 7 to 11 mph, with gusts as high as 21 mph. Chance of precipitation is 20%.
Monday Night
Mostly clear, with a low around 22. Northwest wind 3 to 7 mph.
Tuesday
Sunny, with a high near 50. Calm wind becoming southwest around 6 mph in the afternoon.
Tuesday Night
A chance of rain showers before 2am, then a chance of rain and snow showers. Mostly cloudy, with a low around 35. South wind 3 to 5 mph. Chance of precipitation is 40%.
Wednesday
A chance of snow showers before 8am. Partly sunny, with a high near 57. Chance of precipitation is 30%.
Wednesday Night
Partly cloudy, with a low around 37.
Thursday
Mostly sunny, with a high near 65.
Thursday Night
Partly cloudy, with a low around 40.
Friday
Mostly sunny, with a high near 66.
Friday Night
A chance of showers. Mostly cloudy, with a low around 41. Chance of precipitation is 40%.
Saturday
A chance of showers. Partly sunny, with a high near 59. Chance of precipitation is 50%.
Saturday Night
A chance of showers. Mostly cloudy, with a low around 41. Chance of precipitation is 50%.
Sunday
A chance of showers. Mostly cloudy, with a high near 59. 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:
2:08 am EDT Apr 20, 2026
Forecast Valid:
2am EDT Apr 20, 2026-6pm EDT Apr 26, 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