Current conditions at

Monticello, Sullivan County International Airport (KMSV)

Lat: 41.7°NLon: 74.8°WElev: 1404ft.

Mostly Cloudy

87°F

31°C

Humidity 42%
Wind Speed Vrbl 6 mph
Barometer 30.09 in (1017.9 mb)
Dewpoint 61°F (16°C)
Visibility 10.00 mi
Heat Index87°F (31°C)
Last update 18 May 6:56 pm EDT
Extended Forecast for

Mongaup Valley NY

  • Tonight

    Tonight: Mostly clear, with a low around 64. Southwest wind around 6 mph becoming calm  in the evening.

    Low: 64 °F

    Mostly Clear

  • Tuesday

    Tuesday: Mostly sunny, with a high near 91. Light west wind increasing to 5 to 10 mph in the morning. Winds could gust as high as 20 mph.

    High: 91 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 67. Southwest wind 3 to 5 mph.

    Low: 67 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Showers likely before 11am, then showers likely and possibly a thunderstorm between 11am and 2pm, then showers after 2pm.  High near 85. Northwest wind 6 to 10 mph, with gusts as high as 20 mph.  Chance of precipitation is 80%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    High: 85 °F

    Showers

  • Wednesday Night

    Wednesday Night: Showers before 8pm.  Low around 44. Northwest wind 6 to 8 mph.  Chance of precipitation is 80%.

    Low: 44 °F

    Showers then
    Partly Cloudy

  • Thursday

    Thursday: Mostly sunny, with a high near 66.

    High: 66 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 43.

    Low: 43 °F

    Partly Cloudy

  • Friday

    Friday: Partly sunny, with a high near 66.

    High: 66 °F

    Partly Sunny

  • Friday Night

    Friday Night: Showers likely, mainly after 2am.  Mostly cloudy, with a low around 43. Chance of precipitation is 60%.

    Low: 43 °F

    Showers
    Likely

Detailed Forecast

Tonight
Mostly clear, with a low around 64. Southwest wind around 6 mph becoming calm in the evening.
Tuesday
Mostly sunny, with a high near 91. Light west wind increasing to 5 to 10 mph in the morning. Winds could gust as high as 20 mph.
Tuesday Night
Partly cloudy, with a low around 67. Southwest wind 3 to 5 mph.
Wednesday
Showers likely before 11am, then showers likely and possibly a thunderstorm between 11am and 2pm, then showers after 2pm. High near 85. Northwest wind 6 to 10 mph, with gusts as high as 20 mph. Chance of precipitation is 80%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Wednesday Night
Showers before 8pm. Low around 44. Northwest wind 6 to 8 mph. Chance of precipitation is 80%.
Thursday
Mostly sunny, with a high near 66.
Thursday Night
Partly cloudy, with a low around 43.
Friday
Partly sunny, with a high near 66.
Friday Night
Showers likely, mainly after 2am. Mostly cloudy, with a low around 43. Chance of precipitation is 60%.
Saturday
Showers. High near 58. Chance of precipitation is 80%.
Saturday Night
Showers likely. Cloudy, with a low around 46. Chance of precipitation is 70%.
Sunday
A chance of showers. Mostly cloudy, with a high near 64. Chance of precipitation is 50%.
Sunday Night
A chance of showers. Patchy fog. Otherwise, mostly cloudy, with a low around 49. Chance of precipitation is 40%.
Memorial Day
A chance of showers. Patchy fog. Otherwise, mostly cloudy, with a high near 69. Chance of precipitation is 40%.
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ABOUT THIS FORECAST

 
Point Forecast:
Mongaup Valley NY
 41.67°N 74.79°W (Elev. 1175 ft)
6:32 pm EDT May 18, 2026
7pm EDT May 18, 2026-6pm EDT May 25, 2026
 
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Additional Resources

Radar & Satellite Image

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Hourly Weather Forecast

National Digital Forecast Database