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.

Fog/Mist

59°F

15°C

Humidity 100%
Wind Speed Calm
Barometer 29.87 in (1011.4 mb)
Dewpoint 59°F (15°C)
Visibility 3.00 mi
Last update 13 Oct 11:56 pm EDT
Extended Forecast for

Tennanah Lake NY

  • Overnight

    Overnight: Partly cloudy, with a low around 59. West wind around 10 mph.

    Low: 59 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Partly sunny, with a high near 65. Northwest wind around 9 mph.

    High: 65 °F

    Partly Sunny

  • Wednesday Night

    Wednesday Night: Mostly cloudy, with a low around 44. Northwest wind 11 to 15 mph.

    Low: 44 °F

    Mostly Cloudy

  • Thursday

    Thursday: Mostly sunny, with a high near 60. North wind 5 to 7 mph becoming calm in the morning.

    High: 60 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Showers, mainly after 2am. Low around 47. Southeast wind 6 to 15 mph. Chance of precipitation is 90%.

    Low: 47 °F

    Chance
    Showers then
    Showers

  • Friday

    Friday: Showers, with thunderstorms also possible after 2pm. High near 61. Chance of precipitation is 100%.

    High: 61 °F

    Showers

  • Friday Night

    Friday Night: A chance of rain showers before 5am, then a chance of rain and snow showers. Mostly cloudy, with a low around 32. Breezy. Chance of precipitation is 50%.

    Low: 32 °F

    Breezy.
    Chance
    Showers then
    Chance
    Rain/Snow

  • Saturday

    Saturday: A chance of snow showers before 8am. Mostly sunny, with a high near 39. Breezy. Chance of precipitation is 30%.

    High: 39 °F

    Chance Snow
    Showers and
    Breezy then
    Mostly Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 28.

    Low: 28 °F

    Mostly Clear

Detailed Forecast

Overnight
Partly cloudy, with a low around 59. West wind around 10 mph.
Wednesday
Partly sunny, with a high near 65. Northwest wind around 9 mph.
Wednesday Night
Mostly cloudy, with a low around 44. Northwest wind 11 to 15 mph.
Thursday
Mostly sunny, with a high near 60. North wind 5 to 7 mph becoming calm in the morning.
Thursday Night
Showers, mainly after 2am. Low around 47. Southeast wind 6 to 15 mph. Chance of precipitation is 90%.
Friday
Showers, with thunderstorms also possible after 2pm. High near 61. Chance of precipitation is 100%.
Friday Night
A chance of rain showers before 5am, then a chance of rain and snow showers. Mostly cloudy, with a low around 32. Breezy. Chance of precipitation is 50%.
Saturday
A chance of snow showers before 8am. Mostly sunny, with a high near 39. Breezy. Chance of precipitation is 30%.
Saturday Night
Mostly clear, with a low around 28.
Sunday
Sunny, with a high near 51.
Sunday Night
Mostly clear, with a low around 35.
Monday
Mostly sunny, with a high near 57.
Monday Night
Mostly cloudy, with a low around 41.
Tuesday
Mostly sunny, with a high near 59.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Tennanah Lake NY
 41.88°N 74.95°W (Elev. 2280 ft)
Last Update:
2:30 pm EDT Oct 13, 2026
Forecast Valid:
12am EDT Oct 14, 2026-6pm EDT Oct 20, 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