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

61°F

16°C

Humidity 65%
Wind Speed W 9 mph
Barometer 29.71 in (1005.2 mb)
Dewpoint 49°F (9°C)
Visibility 10.00 mi
Last update 19 Jun 2:56 am EDT
Extended Forecast for

Upper Mongaup NY

  • Overnight

    Overnight: Partly cloudy, with a low around 57. West wind around 10 mph, with gusts as high as 21 mph.

    Low: 57 °F

    Partly Cloudy

  • Juneteenth

    Juneteenth: Mostly sunny, with a high near 78. West wind around 10 mph, with gusts as high as 22 mph.

    High: 78 °F

    Mostly Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 55. West wind 6 to 9 mph, with gusts as high as 20 mph.

    Low: 55 °F

    Mostly Clear

  • Saturday

    Saturday: Sunny, with a high near 76. Northwest wind 11 to 13 mph, with gusts as high as 24 mph.

    High: 76 °F

    Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 54. Northwest wind around 6 mph becoming calm in the evening.

    Low: 54 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny, with a high near 79.

    High: 79 °F

    Sunny

  • Sunday Night

    Sunday Night: A chance of showers after 2am. Mostly cloudy, with a low around 55. Chance of precipitation is 40%.

    Low: 55 °F

    Partly Cloudy
    then Chance
    Showers

  • Monday

    Monday: Showers, with thunderstorms also possible after 2pm. High near 73. Chance of precipitation is 90%.

    High: 73 °F

    Showers

  • Monday Night

    Monday Night: Showers likely and possibly a thunderstorm before 8pm, then showers likely between 8pm and 2am. Mostly cloudy, with a low around 57. Chance of precipitation is 70%.

    Low: 57 °F

    Showers
    Likely

Detailed Forecast

Overnight
Partly cloudy, with a low around 57. West wind around 10 mph, with gusts as high as 21 mph.
Juneteenth
Mostly sunny, with a high near 78. West wind around 10 mph, with gusts as high as 22 mph.
Friday Night
Mostly clear, with a low around 55. West wind 6 to 9 mph, with gusts as high as 20 mph.
Saturday
Sunny, with a high near 76. Northwest wind 11 to 13 mph, with gusts as high as 24 mph.
Saturday Night
Mostly clear, with a low around 54. Northwest wind around 6 mph becoming calm in the evening.
Sunday
Sunny, with a high near 79.
Sunday Night
A chance of showers after 2am. Mostly cloudy, with a low around 55. Chance of precipitation is 40%.
Monday
Showers, with thunderstorms also possible after 2pm. High near 73. Chance of precipitation is 90%.
Monday Night
Showers likely and possibly a thunderstorm before 8pm, then showers likely between 8pm and 2am. Mostly cloudy, with a low around 57. Chance of precipitation is 70%.
Tuesday
Mostly sunny, with a high near 77.
Tuesday Night
Mostly clear, with a low around 55.
Wednesday
Sunny, with a high near 80.
Wednesday Night
Partly cloudy, with a low around 57.
Thursday
Showers likely and possibly a thunderstorm. Partly sunny, with a high near 79. Chance of precipitation is 60%.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Upper Mongaup NY
 41.47°N 74.77°W (Elev. 1201 ft)
Last Update:
2:30 am EDT Jun 19, 2026
Forecast Valid:
3am EDT Jun 19, 2026-6pm EDT Jun 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