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

72°F

22°C

Humidity 64%
Wind Speed NW 3 mph
Barometer 30.12 in (1019.4 mb)
Dewpoint 59°F (15°C)
Visibility 10.00 mi
Last update 14 Aug 7:56 pm EDT
Extended Forecast for

Tennanah Lake NY

  • Tonight

    Tonight: Partly cloudy, with a low around 52. North wind around 5 mph.

    Low: 52 °F

    Partly Cloudy

  • Saturday

    Saturday: Sunny, with a high near 75. Calm wind becoming north around 5 mph in the afternoon.

    High: 75 °F

    Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 55. Light and variable wind becoming east around 5 mph after midnight.

    Low: 55 °F

    Partly Cloudy

  • Sunday

    Sunday: A chance of showers, then showers and possibly a thunderstorm after 2pm. High near 72. South wind 6 to 8 mph. Chance of precipitation is 80%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    High: 72 °F

    Chance
    Showers then
    Showers

  • Sunday Night

    Sunday Night: Showers and possibly a thunderstorm before 2am, then a chance of showers. Low around 62. South wind around 10 mph. Chance of precipitation is 90%.

    Low: 62 °F

    Showers

  • Monday

    Monday: A chance of showers, mainly before 8am. Partly sunny, with a high near 74. Chance of precipitation is 30%.

    High: 74 °F

    Chance
    Showers

  • Monday Night

    Monday Night: Mostly clear, with a low around 56.

    Low: 56 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 75.

    High: 75 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 56.

    Low: 56 °F

    Mostly Clear

Detailed Forecast

Tonight
Partly cloudy, with a low around 52. North wind around 5 mph.
Saturday
Sunny, with a high near 75. Calm wind becoming north around 5 mph in the afternoon.
Saturday Night
Partly cloudy, with a low around 55. Light and variable wind becoming east around 5 mph after midnight.
Sunday
A chance of showers, then showers and possibly a thunderstorm after 2pm. High near 72. South wind 6 to 8 mph. Chance of precipitation is 80%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Sunday Night
Showers and possibly a thunderstorm before 2am, then a chance of showers. Low around 62. South wind around 10 mph. Chance of precipitation is 90%.
Monday
A chance of showers, mainly before 8am. Partly sunny, with a high near 74. Chance of precipitation is 30%.
Monday Night
Mostly clear, with a low around 56.
Tuesday
Sunny, with a high near 75.
Tuesday Night
Mostly clear, with a low around 56.
Wednesday
A chance of showers after 2pm. Mostly sunny, with a high near 77. Chance of precipitation is 30%.
Wednesday Night
A chance of showers. Mostly cloudy, with a low around 60. Chance of precipitation is 50%.
Thursday
A chance of showers. Partly sunny, with a high near 74. Chance of precipitation is 30%.
Thursday Night
Partly cloudy, with a low around 55.
Friday
A chance of showers. Mostly sunny, with a high near 71. Chance of precipitation is 30%.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Tennanah Lake NY
 41.88°N 74.95°W (Elev. 2280 ft)
Last Update:
6:18 pm EDT Aug 14, 2026
Forecast Valid:
8pm EDT Aug 14, 2026-6pm EDT Aug 21, 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