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.

Overcast

76°F

24°C

Humidity 79%
Wind Speed W 8 mph
Barometer 30.01 in (1015.3 mb)
Dewpoint 69°F (21°C)
Visibility 10.00 mi
Heat Index77°F (25°C)
Last update 1 Sep 2:56 pm EDT
Extended Forecast for

Long Flat NY

  • This Afternoon

    This Afternoon: A chance of showers and thunderstorms. Mostly cloudy, with a high near 74. Light west wind. Chance of precipitation is 30%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    High: 74 °F

    Chance
    T-storms

  • Tonight

    Tonight: A chance of showers and thunderstorms before 2am, then a slight chance of showers between 2am and 3am. Mostly cloudy, with a low around 62. Calm wind. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    Low: 62 °F

    Chance
    T-storms then
    Slight Chance
    Showers

  • Wednesday

    Wednesday: A slight chance of showers between 1pm and 2pm, then a slight chance of showers and thunderstorms after 2pm. Mostly cloudy, with a high near 69. South wind 3 to 6 mph. Chance of precipitation is 20%.

    High: 69 °F

    Mostly Cloudy
    then Slight
    Chance
    T-storms

  • Wednesday Night

    Wednesday Night: A chance of showers and thunderstorms, then showers and possibly a thunderstorm after 10pm. Low around 62. South wind around 7 mph. Chance of precipitation is 100%. New rainfall amounts between 1 and 2 inches possible.

    Low: 62 °F

    Showers
    Likely then
    Showers

  • Thursday

    Thursday: Showers and thunderstorms likely before 8am, then showers between 8am and 2pm, then showers and possibly a thunderstorm after 2pm. High near 77. Light and variable wind becoming west around 6 mph in the afternoon. Chance of precipitation is 80%.

    High: 77 °F

    Showers

  • Thursday Night

    Thursday Night: A chance of showers and thunderstorms before 8pm, then a chance of showers between 8pm and 2am. Mostly cloudy, with a low around 60. Chance of precipitation is 40%.

    Low: 60 °F

    Chance
    Showers

  • Friday

    Friday: Mostly sunny, with a high near 74.

    High: 74 °F

    Mostly Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 54.

    Low: 54 °F

    Partly Cloudy

  • Saturday

    Saturday: Mostly sunny, with a high near 70.

    High: 70 °F

    Mostly Sunny

Detailed Forecast

This Afternoon
A chance of showers and thunderstorms. Mostly cloudy, with a high near 74. Light west wind. Chance of precipitation is 30%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Tonight
A chance of showers and thunderstorms before 2am, then a slight chance of showers between 2am and 3am. Mostly cloudy, with a low around 62. Calm wind. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Wednesday
A slight chance of showers between 1pm and 2pm, then a slight chance of showers and thunderstorms after 2pm. Mostly cloudy, with a high near 69. South wind 3 to 6 mph. Chance of precipitation is 20%.
Wednesday Night
A chance of showers and thunderstorms, then showers and possibly a thunderstorm after 10pm. Low around 62. South wind around 7 mph. Chance of precipitation is 100%. New rainfall amounts between 1 and 2 inches possible.
Thursday
Showers and thunderstorms likely before 8am, then showers between 8am and 2pm, then showers and possibly a thunderstorm after 2pm. High near 77. Light and variable wind becoming west around 6 mph in the afternoon. Chance of precipitation is 80%.
Thursday Night
A chance of showers and thunderstorms before 8pm, then a chance of showers between 8pm and 2am. Mostly cloudy, with a low around 60. Chance of precipitation is 40%.
Friday
Mostly sunny, with a high near 74.
Friday Night
Partly cloudy, with a low around 54.
Saturday
Mostly sunny, with a high near 70.
Saturday Night
Partly cloudy, with a low around 52.
Sunday
Mostly sunny, with a high near 70.
Sunday Night
Mostly clear, with a low around 51.
Labor Day
Mostly sunny, with a high near 71.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Long Flat NY
 42.01°N 75.08°W (Elev. 2031 ft)
Last Update:
3:22 pm EDT Sep 1, 2026
Forecast Valid:
3pm EDT Sep 1, 2026-6pm EDT Sep 7, 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