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

48°F

9°C

Humidity 50%
Wind Speed W 6 mph
Barometer 30.08 in (1019.4 mb)
Dewpoint 30°F (-1°C)
Visibility 10.00 mi
Wind Chill45°F (7°C)
Last update 6 Oct 6:56 pm EDT
Extended Forecast for

Mongaup Valley NY

  • Tonight

    Tonight: Patchy frost after 1am. Otherwise, clear, with a low around 35. Northwest wind around 5 mph becoming calm in the evening.

    Low: 35 °F

    Clear then
    Patchy Frost

  • Wednesday

    Wednesday: Areas of frost before 9am. Otherwise, sunny, with a high near 65. Light south wind becoming southwest 5 to 10 mph in the morning.

    High: 65 °F

    Areas Frost
    then Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 45. South wind around 6 mph becoming calm in the evening.

    Low: 45 °F

    Partly Cloudy

  • Thursday

    Thursday: Sunny, with a high near 69. Light west wind increasing to 5 to 10 mph in the morning.

    High: 69 °F

    Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 41. Light northwest wind.

    Low: 41 °F

    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 64.

    High: 64 °F

    Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 40.

    Low: 40 °F

    Mostly Clear

  • Saturday

    Saturday: Patchy frost before 8am. Otherwise, sunny, with a high near 68.

    High: 68 °F

    Patchy Frost
    then Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 44.

    Low: 44 °F

    Mostly Clear

Detailed Forecast

Tonight
Patchy frost after 1am. Otherwise, clear, with a low around 35. Northwest wind around 5 mph becoming calm in the evening.
Wednesday
Areas of frost before 9am. Otherwise, sunny, with a high near 65. Light south wind becoming southwest 5 to 10 mph in the morning.
Wednesday Night
Partly cloudy, with a low around 45. South wind around 6 mph becoming calm in the evening.
Thursday
Sunny, with a high near 69. Light west wind increasing to 5 to 10 mph in the morning.
Thursday Night
Mostly clear, with a low around 41. Light northwest wind.
Friday
Sunny, with a high near 64.
Friday Night
Mostly clear, with a low around 40.
Saturday
Patchy frost before 8am. Otherwise, sunny, with a high near 68.
Saturday Night
Mostly clear, with a low around 44.
Sunday
Mostly sunny, with a high near 69.
Sunday Night
A chance of showers. Mostly cloudy, with a low around 50. Chance of precipitation is 50%.
Columbus Day
A chance of showers. Partly sunny, with a high near 68. Chance of precipitation is 40%.
Monday Night
Mostly cloudy, with a low around 49.
Tuesday
Partly sunny, with a high near 67.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Mongaup Valley NY
 41.67°N 74.79°W (Elev. 1175 ft)
Last Update:
2:30 pm EDT Oct 6, 2026
Forecast Valid:
7pm EDT Oct 6, 2026-6pm EDT Oct 13, 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