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.

Overcast

39°F

4°C

Humidity 100%
Wind Speed E 10 mph
Barometer 30.39 in (1030.4 mb)
Dewpoint 39°F (4°C)
Visibility 9.00 mi
Wind Chill32°F (0°C)
Last update 2 Apr 2:56 pm EDT
Extended Forecast for

Mongaup Valley NY

  • This Afternoon

    This Afternoon: A slight chance of showers before 5pm. Patchy fog after 5pm. Otherwise, mostly cloudy, with a high near 42. East wind around 8 mph. Chance of precipitation is 20%.

    High: 42 °F

    Slight Chance
    Showers and
    Patchy Fog

  • Tonight

    Tonight: A chance of showers, mainly between midnight and 2am. Patchy fog before 1am, then areas of fog after 2am. Otherwise, cloudy, with a low around 36. Southeast wind 6 to 8 mph. Chance of precipitation is 30%.

    Low: 36 °F

    Chance
    Showers and
    Areas Fog

  • Friday

    Friday: Areas of fog before 11am. Otherwise, cloudy, then gradually becoming mostly sunny, with a high near 68. Southwest wind 5 to 10 mph, with gusts as high as 20 mph.

    High: 68 °F

    Areas Fog
    then Mostly
    Sunny

  • Friday Night

    Friday Night: A slight chance of showers before 2am. Mostly cloudy, with a low around 50. Southwest wind around 5 mph becoming calm in the evening. Chance of precipitation is 20%.

    Low: 50 °F

    Slight Chance
    Showers

  • Saturday

    Saturday: A chance of showers, mainly after 2pm. Partly sunny, with a high near 67. Calm wind becoming southeast 5 to 7 mph in the afternoon. Chance of precipitation is 50%.

    High: 67 °F

    Slight Chance
    Showers then
    Chance
    Showers

  • Saturday Night

    Saturday Night: Showers likely, mainly after 8pm. Mostly cloudy, with a low around 43. Chance of precipitation is 70%.

    Low: 43 °F

    Showers
    Likely

  • Sunday

    Sunday: Showers, mainly before 2pm. High near 61. Chance of precipitation is 90%.

    High: 61 °F

    Showers

  • Sunday Night

    Sunday Night: A chance of showers before 8pm. Mostly cloudy, with a low around 32. Chance of precipitation is 30%.

    Low: 32 °F

    Chance
    Showers then
    Mostly Cloudy

  • Monday

    Monday: Partly sunny, with a high near 46.

    High: 46 °F

    Partly Sunny

Detailed Forecast

This Afternoon
A slight chance of showers before 5pm. Patchy fog after 5pm. Otherwise, mostly cloudy, with a high near 42. East wind around 8 mph. Chance of precipitation is 20%.
Tonight
A chance of showers, mainly between midnight and 2am. Patchy fog before 1am, then areas of fog after 2am. Otherwise, cloudy, with a low around 36. Southeast wind 6 to 8 mph. Chance of precipitation is 30%.
Friday
Areas of fog before 11am. Otherwise, cloudy, then gradually becoming mostly sunny, with a high near 68. Southwest wind 5 to 10 mph, with gusts as high as 20 mph.
Friday Night
A slight chance of showers before 2am. Mostly cloudy, with a low around 50. Southwest wind around 5 mph becoming calm in the evening. Chance of precipitation is 20%.
Saturday
A chance of showers, mainly after 2pm. Partly sunny, with a high near 67. Calm wind becoming southeast 5 to 7 mph in the afternoon. Chance of precipitation is 50%.
Saturday Night
Showers likely, mainly after 8pm. Mostly cloudy, with a low around 43. Chance of precipitation is 70%.
Sunday
Showers, mainly before 2pm. High near 61. Chance of precipitation is 90%.
Sunday Night
A chance of showers before 8pm. Mostly cloudy, with a low around 32. Chance of precipitation is 30%.
Monday
Partly sunny, with a high near 46.
Monday Night
Partly cloudy, with a low around 27.
Tuesday
A chance of snow showers. Partly sunny, with a high near 44. Chance of precipitation is 40%.
Tuesday Night
A chance of snow showers. Mostly clear, with a low around 21. Chance of precipitation is 30%.
Wednesday
Sunny, with a high near 47.
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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:
2:31 pm EDT Apr 2, 2026
Forecast Valid:
3pm EDT Apr 2, 2026-6pm EDT Apr 8, 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