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

56°F

13°C

Humidity 75%
Wind Speed SE 6 mph
Barometer 30.15 in (1021.5 mb)
Dewpoint 48°F (9°C)
Visibility 10.00 mi
Last update 4 Oct 4:56 pm EDT
Extended Forecast for

Mongaup Valley NY

  • This Afternoon

    This Afternoon: A slight chance of showers. Mostly cloudy, with a high near 59. Southeast wind around 7 mph. Chance of precipitation is 20%.

    High: 59 °F

    Slight Chance
    Showers

  • Tonight

    Tonight: Patchy fog after 11pm. Otherwise, mostly cloudy, with a low around 45. Calm wind.

    Low: 45 °F

    Patchy Fog

  • Monday

    Monday: Mostly cloudy through mid morning, then gradual clearing, with a high near 60. Northwest wind 7 to 13 mph, with gusts as high as 24 mph.

    High: 60 °F

    Becoming
    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 36. Northwest wind around 7 mph.

    Low: 36 °F

    Mostly Clear

  • Tuesday

    Tuesday: Areas of frost before 8am. Otherwise, sunny, with a high near 57. Northwest wind 5 to 9 mph.

    High: 57 °F

    Areas Frost
    then Sunny

  • Tuesday Night

    Tuesday Night: Clear, with a low around 37.

    Low: 37 °F

    Clear

  • Wednesday

    Wednesday: Sunny, with a high near 65.

    High: 65 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 43.

    Low: 43 °F

    Mostly Clear

  • Thursday

    Thursday: Sunny, with a high near 68.

    High: 68 °F

    Sunny

Detailed Forecast

This Afternoon
A slight chance of showers. Mostly cloudy, with a high near 59. Southeast wind around 7 mph. Chance of precipitation is 20%.
Tonight
Patchy fog after 11pm. Otherwise, mostly cloudy, with a low around 45. Calm wind.
Monday
Mostly cloudy through mid morning, then gradual clearing, with a high near 60. Northwest wind 7 to 13 mph, with gusts as high as 24 mph.
Monday Night
Mostly clear, with a low around 36. Northwest wind around 7 mph.
Tuesday
Areas of frost before 8am. Otherwise, sunny, with a high near 57. Northwest wind 5 to 9 mph.
Tuesday Night
Clear, with a low around 37.
Wednesday
Sunny, with a high near 65.
Wednesday Night
Mostly clear, with a low around 43.
Thursday
Sunny, with a high near 68.
Thursday Night
Mostly clear, with a low around 41.
Friday
Sunny, with a high near 65.
Friday Night
Mostly clear, with a low around 41.
Saturday
Sunny, with a high near 62.
Saturday Night
Mostly clear, with a low around 38.
Sunday
Mostly sunny, with a high near 63.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Mongaup Valley NY
 41.69°N 74.79°W (Elev. 1224 ft)
Last Update:
2:30 pm EDT Oct 4, 2026
Forecast Valid:
5pm EDT Oct 4, 2026-6pm EDT Oct 11, 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