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.

Overcast

39°F

4°C

Humidity 79%
Wind Speed NW 10 G 20 mph
Barometer 29.96 in (1015.3 mb)
Dewpoint 33°F (1°C)
Visibility 10.00 mi
Wind Chill32°F (0°C)
Last update 19 Apr 6:56 pm EDT
Extended Forecast for

Upper Mongaup NY

  • Tonight

    Tonight: Increasing clouds, with a low around 30. Northwest wind 5 to 8 mph becoming calm in the evening.

    Low: 30 °F

    Increasing
    Clouds

  • Monday

    Monday: A slight chance of rain and snow showers before 8am, then a slight chance of snow showers between 8am and 9am. Mostly sunny, with a high near 43. Northwest wind 7 to 10 mph, with gusts as high as 21 mph. Chance of precipitation is 20%.

    High: 43 °F

    Slight Chance
    Rain/Snow
    then Mostly
    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 22. Northwest wind 5 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 showers. Mostly cloudy, with a low around 36. South wind 3 to 6 mph. Chance of precipitation is 30%.

    Low: 36 °F

    Chance
    Showers

  • Wednesday

    Wednesday: Partly sunny, with a high near 59.

    High: 59 °F

    Partly Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 36.

    Low: 36 °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

Tonight
Increasing clouds, with a low around 30. Northwest wind 5 to 8 mph becoming calm in the evening.
Monday
A slight chance of rain and snow showers before 8am, then a slight chance of snow showers between 8am and 9am. Mostly sunny, with a high near 43. Northwest wind 7 to 10 mph, with gusts as high as 21 mph. Chance of precipitation is 20%.
Monday Night
Mostly clear, with a low around 22. Northwest wind 5 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 showers. Mostly cloudy, with a low around 36. South wind 3 to 6 mph. Chance of precipitation is 30%.
Wednesday
Partly sunny, with a high near 59.
Wednesday Night
Partly cloudy, with a low around 36.
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:
2:30 pm EDT Apr 19, 2026
Forecast Valid:
7pm EDT Apr 19, 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