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

35°F

2°C

Humidity 78%
Wind Speed SE 12 mph
Barometer 30.17 in (1023.2 mb)
Dewpoint 29°F (-2°C)
Visibility 10.00 mi
Wind Chill27°F (-3°C)
Last update 15 Mar 9:56 pm EDT
Extended Forecast for

Upper Mongaup NY

  • Tonight

    Tonight: Rain, mainly after 2am. Temperature rising to around 44 by 5am. Southeast wind 11 to 13 mph, with gusts as high as 24 mph. Chance of precipitation is 90%. New precipitation amounts between a quarter and half of an inch possible.

    Low: 35 °F⇑

    Slight Chance
    Rain then
    Rain

  • Monday

    Monday: Rain and thunderstorms before 4pm, then a chance of showers between 4pm and 5pm, then showers likely and possibly a thunderstorm after 5pm. Some of the storms could be severe. High near 61. South wind 8 to 13 mph, with gusts as high as 26 mph. Chance of precipitation is 90%. New rainfall amounts between a half and three quarters of an inch possible.

    High: 61 °F

    Rain then
    Severe
    Thunderstorms

  • Monday Night

    Monday Night: Rain showers before 2am, then a chance of rain and snow showers. Some thunder is also possible. Low around 25. South wind 14 to 16 mph becoming west after midnight. Winds could gust as high as 32 mph. Chance of precipitation is 100%. New snow accumulation of less than a half inch possible.

    Low: 25 °F

    Severe
    Thunderstorms
    then
    Rain/Snow

  • Tuesday

    Tuesday: A chance of snow before 8am. Partly sunny, with a high near 33. West wind around 15 mph, with gusts as high as 32 mph. Chance of precipitation is 30%. New snow accumulation of less than a half inch possible.

    High: 33 °F

    Chance Snow
    then Partly
    Sunny

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 16. West wind 8 to 11 mph, with gusts as high as 21 mph.

    Low: 16 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Mostly sunny, with a high near 36.

    High: 36 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Mostly cloudy, with a low around 21.

    Low: 21 °F

    Mostly Cloudy

  • Thursday

    Thursday: Partly sunny, with a high near 43.

    High: 43 °F

    Partly Sunny

  • Thursday Night

    Thursday Night: Mostly cloudy, with a low around 28.

    Low: 28 °F

    Mostly Cloudy

Detailed Forecast

Tonight
Rain, mainly after 2am. Temperature rising to around 44 by 5am. Southeast wind 11 to 13 mph, with gusts as high as 24 mph. Chance of precipitation is 90%. New precipitation amounts between a quarter and half of an inch possible.
Monday
Rain and thunderstorms before 4pm, then a chance of showers between 4pm and 5pm, then showers likely and possibly a thunderstorm after 5pm. Some of the storms could be severe. High near 61. South wind 8 to 13 mph, with gusts as high as 26 mph. Chance of precipitation is 90%. 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. Some thunder is also possible. Low around 25. South wind 14 to 16 mph becoming west after midnight. Winds could gust as high as 32 mph. Chance of precipitation is 100%. New snow accumulation of less than a half inch possible.
Tuesday
A chance of snow before 8am. Partly sunny, with a high near 33. West wind around 15 mph, with gusts as high as 32 mph. Chance of precipitation is 30%. New snow accumulation of less than a half inch possible.
Tuesday Night
Partly cloudy, with a low around 16. West wind 8 to 11 mph, with gusts as high as 21 mph.
Wednesday
Mostly sunny, with a high near 36.
Wednesday Night
Mostly cloudy, with a low around 21.
Thursday
Partly sunny, with a high near 43.
Thursday Night
Mostly cloudy, with a low around 28.
Friday
Partly sunny, with a high near 47.
Friday Night
A chance of rain. Mostly cloudy, with a low around 32. Chance of precipitation is 40%.
Saturday
A chance of rain. Mostly cloudy, with a high near 49. Chance of precipitation is 40%.
Saturday Night
Mostly cloudy, with a low around 29.
Sunday
Mostly sunny, with a high near 43.
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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:
6:44 pm EDT Mar 15, 2026
Forecast Valid:
10pm EDT Mar 15, 2026-6pm EDT Mar 22, 2026
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

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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