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

60°F

16°C

Humidity 100%
Wind Speed Calm
Barometer 29.86 in (1010.8 mb)
Dewpoint 60°F (16°C)
Visibility 6.00 mi
Last update 14 Oct 12:56 am EDT
Extended Forecast for

Tennanah Lake NY

  • Overnight

    Overnight: Partly cloudy, with a low around 59. West wind around 8 mph.

    Low: 59 °F

    Partly Cloudy

  • Wednesday

    Wednesday: A slight chance of showers between 11am and noon. Partly sunny, with a high near 67. Northwest wind around 9 mph. Chance of precipitation is 20%.

    High: 67 °F

    Slight Chance
    Showers then
    Partly Sunny

  • Wednesday Night

    Wednesday Night: Mostly cloudy, with a low around 43. Northwest wind 10 to 13 mph.

    Low: 43 °F

    Mostly Cloudy

  • Thursday

    Thursday: Mostly sunny, with a high near 61. North wind 5 to 7 mph becoming calm in the morning.

    High: 61 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Showers, with thunderstorms also possible after 5am. Low around 45. Southeast wind 5 to 11 mph. Chance of precipitation is 100%.

    Low: 45 °F

    Slight Chance
    Showers then
    Showers

  • Friday

    Friday: Showers and possibly a thunderstorm before 11am, then showers likely between 11am and 2pm, then showers and possibly a thunderstorm after 2pm. High near 65. Chance of precipitation is 90%.

    High: 65 °F

    Showers

  • Friday Night

    Friday Night: Rain showers before 5am, then a chance of rain and snow showers. Low around 33. Breezy. Chance of precipitation is 80%.

    Low: 33 °F

    Breezy.
    Showers then
    Rain/Snow
    Likely

  • Saturday

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

    High: 39 °F

    Chance
    Rain/Snow and
    Breezy then
    Mostly Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 29.

    Low: 29 °F

    Mostly Clear

Detailed Forecast

Overnight
Partly cloudy, with a low around 59. West wind around 8 mph.
Wednesday
A slight chance of showers between 11am and noon. Partly sunny, with a high near 67. Northwest wind around 9 mph. Chance of precipitation is 20%.
Wednesday Night
Mostly cloudy, with a low around 43. Northwest wind 10 to 13 mph.
Thursday
Mostly sunny, with a high near 61. North wind 5 to 7 mph becoming calm in the morning.
Thursday Night
Showers, with thunderstorms also possible after 5am. Low around 45. Southeast wind 5 to 11 mph. Chance of precipitation is 100%.
Friday
Showers and possibly a thunderstorm before 11am, then showers likely between 11am and 2pm, then showers and possibly a thunderstorm after 2pm. High near 65. Chance of precipitation is 90%.
Friday Night
Rain showers before 5am, then a chance of rain and snow showers. Low around 33. Breezy. Chance of precipitation is 80%.
Saturday
A chance of rain and 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 29.
Sunday
Sunny, with a high near 54.
Sunday Night
Mostly clear, with a low around 34.
Monday
Sunny, with a high near 59.
Monday Night
Mostly cloudy, with a low around 40.
Tuesday
Partly sunny, with a high near 61.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Tennanah Lake NY
 41.89°N 74.98°W (Elev. 2001 ft)
Last Update:
2:30 am EDT Oct 14, 2026
Forecast Valid:
3am EDT Oct 14, 2026-6pm EDT Oct 20, 2026
 
Forecast Discussion
 
Get as KML Get as XML

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