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.

Mostly Cloudy

62°F

17°C

Humidity 56%
Wind Speed Vrbl 3 mph
Barometer 30.22 in (1023.5 mb)
Dewpoint 46°F (8°C)
Visibility 10.00 mi
Last update 21 May 3:56 pm EDT
Extended Forecast for

Long Flat NY

Frost Advisory May 21, 11:00pm until May 22, 08:00am
Click here for hazard details and duration
Frost Advisory

  • This Afternoon

    This Afternoon: Mostly cloudy, with a high near 60. North wind around 5 mph.

    High: 60 °F

    Mostly Cloudy

  • Tonight

    Tonight: Patchy frost after 5am. Otherwise, cloudy, then gradually becoming partly cloudy, with a low around 37. Light north wind.

    Low: 37 °F

    Mostly Cloudy
    then Patchy
    Frost

  • Friday

    Friday: Partly sunny, with a high near 66. Light and variable wind becoming southeast around 5 mph in the afternoon.

    High: 66 °F

    Partly Sunny

  • Friday Night

    Friday Night: A slight chance of showers after 2am. Mostly cloudy, with a low around 43. Light southeast wind. Chance of precipitation is 20%.

    Low: 43 °F

    Mostly Cloudy
    then Slight
    Chance
    Showers

  • Saturday

    Saturday: Showers, mainly after 8am. High near 51. Southeast wind 6 to 9 mph, with gusts as high as 20 mph. Chance of precipitation is 90%.

    High: 51 °F

    Showers

  • Saturday Night

    Saturday Night: Showers. Low around 40. Chance of precipitation is 100%.

    Low: 40 °F

    Showers

  • Sunday

    Sunday: Showers before 2pm. High near 59. Chance of precipitation is 80%.

    High: 59 °F

    Showers

  • Sunday Night

    Sunday Night: A chance of showers after 2am. Cloudy, with a low around 48. Chance of precipitation is 40%.

    Low: 48 °F

    Mostly Cloudy
    then Chance
    Showers

  • Memorial Day

    Memorial Day: A chance of showers. Mostly cloudy, with a high near 69. Chance of precipitation is 40%.

    High: 69 °F

    Chance
    Showers

Detailed Forecast

This Afternoon
Mostly cloudy, with a high near 60. North wind around 5 mph.
Tonight
Patchy frost after 5am. Otherwise, cloudy, then gradually becoming partly cloudy, with a low around 37. Light north wind.
Friday
Partly sunny, with a high near 66. Light and variable wind becoming southeast around 5 mph in the afternoon.
Friday Night
A slight chance of showers after 2am. Mostly cloudy, with a low around 43. Light southeast wind. Chance of precipitation is 20%.
Saturday
Showers, mainly after 8am. High near 51. Southeast wind 6 to 9 mph, with gusts as high as 20 mph. Chance of precipitation is 90%.
Saturday Night
Showers. Low around 40. Chance of precipitation is 100%.
Sunday
Showers before 2pm. High near 59. Chance of precipitation is 80%.
Sunday Night
A chance of showers after 2am. Cloudy, with a low around 48. Chance of precipitation is 40%.
Memorial Day
A chance of showers. Mostly cloudy, with a high near 69. Chance of precipitation is 40%.
Monday Night
Mostly cloudy, with a low around 51.
Tuesday
Partly sunny, with a high near 77.
Tuesday Night
Partly cloudy, with a low around 53.
Wednesday
Mostly sunny, with a high near 78.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Long Flat NY
 42.01°N 75.08°W (Elev. 2031 ft)
Last Update:
2:30 pm EDT May 21, 2026
Forecast Valid:
4pm EDT May 21, 2026-6pm EDT May 27, 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