National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Hazardous Weather Conditions

Current conditions at

Monticello, Sullivan County International Airport (KMSV)

Lat: 41.7°NLon: 74.8°WElev: 1404ft.

Fair

78°F

26°C

Humidity 52%
Wind Speed Calm
Barometer 29.89 in (1011.7 mb)
Dewpoint 59°F (15°C)
Visibility 10.00 mi
Heat Index79°F (26°C)
Last update 15 Apr 6:56 pm EDT
Extended Forecast for

Mongaup Valley NY

  • Tonight

    Tonight: A chance of showers and thunderstorms before 2am, then a slight chance of showers. Some of the storms could be severe. Areas of fog after 5am. Otherwise, mostly cloudy, with a low around 60. West wind around 5 mph becoming calm in the evening. Chance of precipitation is 50%. New rainfall amounts between a quarter and half of an inch possible.

    Low: 60 °F

    Severe
    Thunderstorms
    and Areas Fog

  • Thursday

    Thursday: Areas of fog before 10am. Otherwise, mostly sunny, with a high near 82. Calm wind becoming southwest 5 to 8 mph in the morning.

    High: 82 °F

    Areas Fog
    then Mostly
    Sunny

  • Thursday Night

    Thursday Night: A chance of showers, mainly between 8pm and 2am. Mostly cloudy, with a low around 57. West wind 3 to 5 mph. Chance of precipitation is 40%.

    Low: 57 °F

    Chance
    Showers

  • Friday

    Friday: A chance of showers after 8am. Partly sunny, with a high near 71. Northwest wind around 6 mph. Chance of precipitation is 40%. New precipitation amounts of less than a tenth of an inch possible.

    High: 71 °F

    Chance
    Showers

  • Friday Night

    Friday Night: Partly cloudy, with a low around 51. Calm wind.

    Low: 51 °F

    Partly Cloudy

  • Saturday

    Saturday: Partly sunny, with a high near 69.

    High: 69 °F

    Partly Sunny

  • Saturday Night

    Saturday Night: A chance of showers. Mostly cloudy, with a low around 41. Chance of precipitation is 50%.

    Low: 41 °F

    Chance
    Showers

  • Sunday

    Sunday: Showers likely, mainly before 2pm. Mostly cloudy, with a high near 53. Chance of precipitation is 60%.

    High: 53 °F

    Showers
    Likely

  • Sunday Night

    Sunday Night: A chance of rain showers before 11pm, then a chance of snow showers between 11pm and 2am. Partly cloudy, with a low around 27. Chance of precipitation is 30%.

    Low: 27 °F

    Chance
    Rain/Snow
    then Chance
    Snow Showers

Detailed Forecast

Tonight
A chance of showers and thunderstorms before 2am, then a slight chance of showers. Some of the storms could be severe. Areas of fog after 5am. Otherwise, mostly cloudy, with a low around 60. West wind around 5 mph becoming calm in the evening. Chance of precipitation is 50%. New rainfall amounts between a quarter and half of an inch possible.
Thursday
Areas of fog before 10am. Otherwise, mostly sunny, with a high near 82. Calm wind becoming southwest 5 to 8 mph in the morning.
Thursday Night
A chance of showers, mainly between 8pm and 2am. Mostly cloudy, with a low around 57. West wind 3 to 5 mph. Chance of precipitation is 40%.
Friday
A chance of showers after 8am. Partly sunny, with a high near 71. Northwest wind around 6 mph. Chance of precipitation is 40%. New precipitation amounts of less than a tenth of an inch possible.
Friday Night
Partly cloudy, with a low around 51. Calm wind.
Saturday
Partly sunny, with a high near 69.
Saturday Night
A chance of showers. Mostly cloudy, with a low around 41. Chance of precipitation is 50%.
Sunday
Showers likely, mainly before 2pm. Mostly cloudy, with a high near 53. Chance of precipitation is 60%.
Sunday Night
A chance of rain showers before 11pm, then a chance of snow showers between 11pm and 2am. Partly cloudy, with a low around 27. Chance of precipitation is 30%.
Monday
Mostly sunny, with a high near 42.
Monday Night
Mostly clear, with a low around 24.
Tuesday
Sunny, with a high near 54.
Tuesday Night
Partly cloudy, with a low around 38.
Wednesday
Partly sunny, with a high near 61.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Mongaup Valley NY
 41.65°N 74.79°W (Elev. 1181 ft)
Last Update:
3:13 pm EDT Apr 15, 2026
Forecast Valid:
7pm EDT Apr 15, 2026-6pm EDT Apr 22, 2026
 
Forecast Discussion
 
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Additional Resources

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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