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

27°F

-3°C

Humidity 78%
Wind Speed Calm
Barometer 30.35 in (1029.4 mb)
Dewpoint 21°F (-6°C)
Visibility 10.00 mi
Last update 15 Mar 4:56 am EDT
Extended Forecast for

Upper Mongaup NY

  • Overnight

    Overnight: A slight chance of light snow. Mostly cloudy, with a low around 25. Calm wind. Chance of precipitation is 20%.

    Low: 25 °F

    Slight Chance
    Light Snow

  • Sunday

    Sunday: Mostly cloudy, with a high near 43. East wind 5 to 11 mph, with gusts as high as 26 mph.

    High: 43 °F

    Mostly Cloudy

  • Sunday Night

    Sunday Night: Showers, mainly after 2am. Low around 34. Southeast wind 11 to 13 mph, with gusts as high as 25 mph. Chance of precipitation is 90%. New precipitation amounts between a quarter and half of an inch possible.

    Low: 34 °F

    Slight Chance
    Showers then
    Showers

  • Monday

    Monday: Showers, with thunderstorms also possible after 2pm. Some of the storms could be severe. High near 60. South wind 11 to 14 mph, with gusts as high as 29 mph. Chance of precipitation is 80%. New rainfall amounts between a half and three quarters of an inch possible.

    High: 60 °F

    Showers then
    Severe
    Thunderstorms

  • Monday Night

    Monday Night: Rain showers before 2am, then a chance of rain and snow showers between 2am and 3am, then a chance of snow showers after 3am. Some thunder is also possible. Low around 25. South wind 15 to 17 mph becoming west in the evening. Winds could gust as high as 32 mph. Chance of precipitation is 100%.

    Low: 25 °F

    Severe
    Thunderstorms
    then
    Rain/Snow

  • Tuesday

    Tuesday: A chance of snow showers before 8am. Partly sunny, with a high near 31. Chance of precipitation is 30%.

    High: 31 °F

    Chance Snow
    Showers then
    Partly Sunny

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 17.

    Low: 17 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Mostly sunny, with a high near 35.

    High: 35 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Mostly cloudy, with a low around 22.

    Low: 22 °F

    Mostly Cloudy

Detailed Forecast

Overnight
A slight chance of light snow. Mostly cloudy, with a low around 25. Calm wind. Chance of precipitation is 20%.
Sunday
Mostly cloudy, with a high near 43. East wind 5 to 11 mph, with gusts as high as 26 mph.
Sunday Night
Showers, mainly after 2am. Low around 34. Southeast wind 11 to 13 mph, with gusts as high as 25 mph. Chance of precipitation is 90%. New precipitation amounts between a quarter and half of an inch possible.
Monday
Showers, with thunderstorms also possible after 2pm. Some of the storms could be severe. High near 60. South wind 11 to 14 mph, with gusts as high as 29 mph. Chance of precipitation is 80%. New rainfall amounts between a half and three quarters of an inch possible.
Monday Night
Rain showers before 2am, then a chance of rain and snow showers between 2am and 3am, then a chance of snow showers after 3am. Some thunder is also possible. Low around 25. South wind 15 to 17 mph becoming west in the evening. Winds could gust as high as 32 mph. Chance of precipitation is 100%.
Tuesday
A chance of snow showers before 8am. Partly sunny, with a high near 31. Chance of precipitation is 30%.
Tuesday Night
Partly cloudy, with a low around 17.
Wednesday
Mostly sunny, with a high near 35.
Wednesday Night
Mostly cloudy, with a low around 22.
Thursday
Partly sunny, with a high near 44.
Thursday Night
Mostly cloudy, with a low around 28.
Friday
Partly sunny, with a high near 48.
Friday Night
A chance of rain and snow showers. Mostly cloudy, with a low around 30. Chance of precipitation is 50%.
Saturday
A chance of rain and snow showers. Partly sunny, with a high near 44. Chance of precipitation is 50%.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Upper Mongaup NY
 41.47°N 74.8°W (Elev. 1224 ft)
Last Update:
4:57 am EDT Mar 15, 2026
Forecast Valid:
5am EDT Mar 15, 2026-6pm EDT Mar 21, 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