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.

Mostly Cloudy

80°F

27°C

Humidity 51%
Wind Speed W 9 mph
Barometer 29.86 in (1010.4 mb)
Dewpoint 60°F (16°C)
Visibility 10.00 mi
Heat Index81°F (27°C)
Last update 16 Apr 1:56 pm EDT
Extended Forecast for

Upper Mongaup NY

  • This Afternoon

    This Afternoon: Mostly sunny, with a high near 83. Southwest wind around 8 mph.

    High: 83 °F

    Mostly Sunny

  • Tonight

    Tonight: A slight chance of showers before 2am, then a slight chance of showers after 3am. Mostly cloudy, with a low around 58. Southwest wind around 5 mph becoming northwest in the evening. Chance of precipitation is 20%.

    Low: 58 °F

    Partly Cloudy
    then Slight
    Chance
    Showers

  • Friday

    Friday: A slight chance of showers after 2pm. Mostly sunny, with a high near 73. Northwest wind around 6 mph. Chance of precipitation is 20%.

    High: 73 °F

    Mostly Sunny
    then Slight
    Chance
    Showers

  • Friday Night

    Friday Night: Partly cloudy, with a low around 52. Calm wind.

    Low: 52 °F

    Partly Cloudy

  • Saturday

    Saturday: Partly sunny, with a high near 70. South wind 5 to 8 mph.

    High: 70 °F

    Partly Sunny

  • Saturday Night

    Saturday Night: Showers likely, mainly after 2am. Mostly cloudy, with a low around 40. Chance of precipitation is 60%.

    Low: 40 °F

    Showers
    Likely

  • Sunday

    Sunday: Showers. High near 52. Chance of precipitation is 80%.

    High: 52 °F

    Showers

  • Sunday Night

    Sunday Night: Rain and snow showers likely before 11pm, then a chance of snow showers between 11pm and 2am. Partly cloudy, with a low around 28. Chance of precipitation is 60%.

    Low: 28 °F

    Rain/Snow
    Likely then
    Chance Snow
    Showers

  • Monday

    Monday: Mostly sunny, with a high near 42.

    High: 42 °F

    Mostly Sunny

Detailed Forecast

This Afternoon
Mostly sunny, with a high near 83. Southwest wind around 8 mph.
Tonight
A slight chance of showers before 2am, then a slight chance of showers after 3am. Mostly cloudy, with a low around 58. Southwest wind around 5 mph becoming northwest in the evening. Chance of precipitation is 20%.
Friday
A slight chance of showers after 2pm. Mostly sunny, with a high near 73. Northwest wind around 6 mph. Chance of precipitation is 20%.
Friday Night
Partly cloudy, with a low around 52. Calm wind.
Saturday
Partly sunny, with a high near 70. South wind 5 to 8 mph.
Saturday Night
Showers likely, mainly after 2am. Mostly cloudy, with a low around 40. Chance of precipitation is 60%.
Sunday
Showers. High near 52. Chance of precipitation is 80%.
Sunday Night
Rain and snow showers likely before 11pm, then a chance of snow showers between 11pm and 2am. Partly cloudy, with a low around 28. Chance of precipitation is 60%.
Monday
Mostly sunny, with a high near 42.
Monday Night
Mostly clear, with a low around 23.
Tuesday
Sunny, with a high near 52.
Tuesday Night
A chance of showers. Mostly cloudy, with a low around 39. Chance of precipitation is 30%.
Wednesday
Partly sunny, with a high near 61.
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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 16, 2026
Forecast Valid:
2pm EDT Apr 16, 2026-6pm EDT Apr 22, 2026
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

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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