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

38°F

3°C

Humidity 48%
Wind Speed W 16 G 24 mph
Barometer 30.17 in (1023.2 mb)
Dewpoint 20°F (-7°C)
Visibility 10.00 mi
Wind Chill29°F (-2°C)
Last update 20 Apr 12:56 pm EDT
Extended Forecast for

Upper Mongaup NY

  • This Afternoon

    This Afternoon: Mostly sunny, with a high near 42. Northwest wind around 11 mph, with gusts as high as 21 mph.

    High: 42 °F

    Mostly Sunny

  • Tonight

    Tonight: 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%. Little or no snow accumulation expected.

    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. Light and variable wind becoming southwest around 6 mph in the afternoon. 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 64.

    High: 64 °F

    Mostly Sunny

  • Thursday Night

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

    Low: 40 °F

    Partly Cloudy

  • Friday

    Friday: Mostly sunny, with a high near 63.

    High: 63 °F

    Mostly Sunny

Detailed Forecast

This Afternoon
Mostly sunny, with a high near 42. Northwest wind around 11 mph, with gusts as high as 21 mph.
Tonight
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%. Little or no snow accumulation expected.
Wednesday
A chance of snow showers before 8am. Partly sunny, with a high near 57. Light and variable wind becoming southwest around 6 mph in the afternoon. Chance of precipitation is 30%.
Wednesday Night
Partly cloudy, with a low around 37.
Thursday
Mostly sunny, with a high near 64.
Thursday Night
Partly cloudy, with a low around 40.
Friday
Mostly sunny, with a high near 63.
Friday Night
A chance of showers. Mostly cloudy, with a low around 40. Chance of precipitation is 30%.
Saturday
A chance of showers. Partly sunny, with a high near 57. Chance of precipitation is 40%.
Saturday Night
A chance of showers. Mostly cloudy, with a low around 39. Chance of precipitation is 50%.
Sunday
A chance of showers. Partly sunny, with a high near 57. Chance of precipitation is 40%.
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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:
8:40 am EDT Apr 20, 2026
Forecast Valid:
1pm EDT Apr 20, 2026-6pm EDT Apr 26, 2026
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

National Digital Forecast Database

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation