National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce
Current conditions at

Monticello, Sullivan County International Airport (KMSV)

Lat: 41.7°NLon: 74.8°WElev: 1404ft.

Fair

40°F

4°C

Humidity 53%
Wind Speed Calm
Barometer 30.27 in (1025.9 mb)
Dewpoint 24°F (-4°C)
Visibility 10.00 mi
Last update 30 Mar 12:56 am EDT
Extended Forecast for

Mongaup Valley NY

  • Overnight

    Overnight: Partly cloudy, with a low around 36. South wind around 6 mph.

    Low: 36 °F

    Partly Cloudy

  • Monday

    Monday: Increasing clouds, with a high near 61. Southwest wind 6 to 10 mph, with gusts as high as 22 mph.

    High: 61 °F

    Increasing
    Clouds

  • Monday Night

    Monday Night: Showers likely, mainly after 2am. Mostly cloudy, with a low around 49. Southwest wind 3 to 6 mph. Chance of precipitation is 60%. New precipitation amounts between a tenth and quarter of an inch possible.

    Low: 49 °F

    Slight Chance
    Showers then
    Showers
    Likely

  • Tuesday

    Tuesday: Showers likely before 8am, then a chance of rain between 8am and 2pm, then a chance of rain and thunderstorms after 2pm. Mostly cloudy, with a high near 69. Southwest wind 5 to 8 mph. Chance of precipitation is 60%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    High: 69 °F

    Showers
    Likely

  • Tuesday Night

    Tuesday Night: A chance of rain and thunderstorms. Mostly cloudy, with a low around 57. Southwest wind around 8 mph. Chance of precipitation is 40%.

    Low: 57 °F

    Chance Rain

  • Wednesday

    Wednesday: Rain likely and possibly a thunderstorm before 11am, then rain likely between 11am and 2pm, then rain likely and possibly a thunderstorm after 2pm. Mostly cloudy, with a high near 67. Chance of precipitation is 70%.

    High: 67 °F

    Rain Likely

  • Wednesday Night

    Wednesday Night: A chance of rain. Mostly cloudy, with a low around 43. Chance of precipitation is 50%.

    Low: 43 °F

    Chance Rain

  • Thursday

    Thursday: A chance of rain. Mostly cloudy, with a high near 53. Chance of precipitation is 50%.

    High: 53 °F

    Chance Rain

  • Thursday Night

    Thursday Night: A chance of rain. Mostly cloudy, with a low around 41. Chance of precipitation is 40%.

    Low: 41 °F

    Chance Rain

Detailed Forecast

Overnight
Partly cloudy, with a low around 36. South wind around 6 mph.
Monday
Increasing clouds, with a high near 61. Southwest wind 6 to 10 mph, with gusts as high as 22 mph.
Monday Night
Showers likely, mainly after 2am. Mostly cloudy, with a low around 49. Southwest wind 3 to 6 mph. Chance of precipitation is 60%. New precipitation amounts between a tenth and quarter of an inch possible.
Tuesday
Showers likely before 8am, then a chance of rain between 8am and 2pm, then a chance of rain and thunderstorms after 2pm. Mostly cloudy, with a high near 69. Southwest wind 5 to 8 mph. Chance of precipitation is 60%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Tuesday Night
A chance of rain and thunderstorms. Mostly cloudy, with a low around 57. Southwest wind around 8 mph. Chance of precipitation is 40%.
Wednesday
Rain likely and possibly a thunderstorm before 11am, then rain likely between 11am and 2pm, then rain likely and possibly a thunderstorm after 2pm. Mostly cloudy, with a high near 67. Chance of precipitation is 70%.
Wednesday Night
A chance of rain. Mostly cloudy, with a low around 43. Chance of precipitation is 50%.
Thursday
A chance of rain. Mostly cloudy, with a high near 53. Chance of precipitation is 50%.
Thursday Night
A chance of rain. Mostly cloudy, with a low around 41. Chance of precipitation is 40%.
Friday
A chance of rain. Mostly cloudy, with a high near 67. Chance of precipitation is 50%.
Friday Night
A chance of rain. Mostly cloudy, with a low around 51. Chance of precipitation is 50%.
Saturday
A chance of rain. Mostly cloudy, with a high near 68. Chance of precipitation is 40%.
Saturday Night
A chance of rain. Mostly cloudy, with a low around 45. Chance of precipitation is 50%.
Sunday
Rain likely. Mostly cloudy, with a high near 60. Chance of precipitation is 60%.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Mongaup Valley NY
 41.65°N 74.79°W (Elev. 1181 ft)
Last Update:
1:17 am EDT Mar 30, 2026
Forecast Valid:
1am EDT Mar 30, 2026-6pm EDT Apr 5, 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