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.

Freezing Fog

31°F

-1°C

Humidity 96%
Wind Speed S 8 mph
Barometer 29.64 in (1005.0 mb)
Dewpoint 30°F (-1°C)
Visibility 0.25 mi
Wind Chill24°F (-4°C)
Last update 29 Dec 12:56 am EST
Extended Forecast for

Mongaup Valley NY

Wind Advisory December 29, 10:00am until December 30, 07:00pm
Dense Fog Advisory until December 29, 10:00am
Winter Weather Advisory December 29, 01:16am until December 29, 04:00am
Click here for hazard details and duration
Wind Advisory
Dense Fog Advisory
Winter Weather Advisory
  •  
    Dense Fog Advisory until December 29, 10:00am
    Winter Weather Advisory December 29, 01:16am until December 29, 04:00am

    NOW: Multiple hazards in effect

    Click HERE for Details

  • Overnight

    Low: 27 °F

    Chance
    Rain/Freezing
    Rain

  • Monday

    Monday: Showers, mainly before 10am. High near 43. South wind 9 to 16 mph becoming west in the afternoon. Winds could gust as high as 33 mph. Chance of precipitation is 90%. New precipitation amounts of less than a tenth of an inch possible.

    High: 43 °F

    Showers then
    Slight Chance
    Showers

  • Monday Night

    Monday Night: A slight chance of snow showers between 1am and 4am. Increasing clouds, with a low around 17. Breezy, with a west wind 15 to 21 mph, with gusts as high as 43 mph. Chance of precipitation is 20%.

    Low: 17 °F

    Mostly Cloudy
    then Slight
    Chance Snow
    Showers and
    Breezy

  • Tuesday

    Tuesday: Mostly cloudy, with a high near 24. Wind chill values as low as zero. Breezy, with a west wind 17 to 22 mph, with gusts as high as 46 mph.

    High: 24 °F

    Mostly Cloudy
    and Breezy

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 17. West wind 7 to 14 mph, with gusts as high as 29 mph.

    Low: 17 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: A chance of snow showers after 1pm. Mostly cloudy, with a high near 27. Chance of precipitation is 40%.

    High: 27 °F

    Mostly Cloudy
    then Chance
    Snow Showers

  • Wednesday Night

    Wednesday Night: A chance of snow showers before 1am. Mostly cloudy, with a low around 9. Chance of precipitation is 50%.

    Low: 9 °F

    Chance Snow
    Showers

  • New Year's Day

    New Year's Day: Mostly sunny, with a high near 20.

    High: 20 °F

    Mostly Sunny

Detailed Forecast

Overnight
A slight chance of rain or freezing rain before 4am, then a chance of rain showers between 4am and 5am, then a chance of rain or freezing rain after 5am. Cloudy, with a low around 27. South wind around 6 mph. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch possible.
Monday
Showers, mainly before 10am. High near 43. South wind 9 to 16 mph becoming west in the afternoon. Winds could gust as high as 33 mph. Chance of precipitation is 90%. New precipitation amounts of less than a tenth of an inch possible.
Monday Night
A slight chance of snow showers between 1am and 4am. Increasing clouds, with a low around 17. Breezy, with a west wind 15 to 21 mph, with gusts as high as 43 mph. Chance of precipitation is 20%.
Tuesday
Mostly cloudy, with a high near 24. Wind chill values as low as zero. Breezy, with a west wind 17 to 22 mph, with gusts as high as 46 mph.
Tuesday Night
Mostly cloudy, with a low around 17. West wind 7 to 14 mph, with gusts as high as 29 mph.
Wednesday
A chance of snow showers after 1pm. Mostly cloudy, with a high near 27. Chance of precipitation is 40%.
Wednesday Night
A chance of snow showers before 1am. Mostly cloudy, with a low around 9. Chance of precipitation is 50%.
New Year's Day
Mostly sunny, with a high near 20.
Thursday Night
Partly cloudy, with a low around 6.
Friday
Mostly sunny, with a high near 21.
Friday Night
Partly cloudy, with a low around 8.
Saturday
Partly sunny, with a high near 25.
Saturday Night
Mostly cloudy, with a low around 9.
Sunday
Mostly sunny, with a high near 26.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Mongaup Valley NY
 41.65°N 74.79°W (Elev. 1181 ft)
Last Update:
1:04 am EST Dec 29, 2025
Forecast Valid:
1am EST Dec 29, 2025-6pm EST Jan 4, 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