National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Hazardous Weather Conditions

Current conditions at

Monticello, Sullivan County International Airport (KMSV)

Lat: 41.7°NLon: 74.8°WElev: 1404ft.

Fog/Mist

30°F

-1°C

Humidity 96%
Wind Speed Calm
Barometer 29.92 in (1014.4 mb)
Dewpoint 29°F (-2°C)
Visibility 4.00 mi
Last update 18 Feb 5:56 am EST
Extended Forecast for

Tennanah Lake NY

Dense Fog Advisory until February 18, 08:00am
Click here for hazard details and duration
...
  •  
    Dense Fog Advisory until February 18, 08:00am

    NOW until 8:00am Wed

    Dense Fog Advisory

  • Today

    High: 38 °F

    Showers and
    Areas Dense
    Fog

  • Tonight

    Tonight: Showers likely, mainly before 10pm. Mostly cloudy, with a low around 28. Southeast wind around 6 mph. Chance of precipitation is 60%. New precipitation amounts between a tenth and quarter of an inch possible.

    Low: 28 °F

    Showers
    Likely then
    Mostly Cloudy

  • Thursday

    Thursday: A slight chance of freezing rain after 1pm. Mostly cloudy, with a high near 34. Southeast wind around 6 mph. Chance of precipitation is 20%.

    High: 34 °F

    Mostly Cloudy
    then Slight
    Chance
    Freezing Rain

  • Thursday Night

    Thursday Night: A chance of freezing rain before 10pm, then snow showers and freezing rain likely. Cloudy, with a low around 28. Southeast wind 8 to 10 mph. Chance of precipitation is 60%. New ice accumulation of less than a 0.1 of an inch possible. New snow accumulation of less than a half inch possible.

    Low: 28 °F

    Chance Wintry
    Mix then
    Wintry Mix
    Likely

  • Friday

    Friday: Freezing rain, possibly mixed with snow showers before 1pm, then rain or freezing rain. High near 34. Southeast wind 8 to 10 mph. Chance of precipitation is 100%.

    High: 34 °F

    Wintry Mix

  • Friday Night

    Friday Night: A chance of rain or freezing rain before 10pm, then a chance of snow showers. Mostly cloudy, with a low around 29. Chance of precipitation is 50%.

    Low: 29 °F

    Chance Wintry
    Mix then
    Chance Snow
    Showers

  • Saturday

    Saturday: Mostly cloudy, with a high near 35.

    High: 35 °F

    Mostly Cloudy

  • Saturday Night

    Saturday Night: A chance of snow showers after 1am. Mostly cloudy, with a low around 22. Chance of precipitation is 30%.

    Low: 22 °F

    Mostly Cloudy
    then Chance
    Snow Showers

Detailed Forecast

Today
Showers, mainly after 10am. Areas of dense fog before 8am. High near 38. Calm wind becoming southeast around 5 mph in the afternoon. Chance of precipitation is 100%. New precipitation amounts between a quarter and half of an inch possible.
Tonight
Showers likely, mainly before 10pm. Mostly cloudy, with a low around 28. Southeast wind around 6 mph. Chance of precipitation is 60%. New precipitation amounts between a tenth and quarter of an inch possible.
Thursday
A slight chance of freezing rain after 1pm. Mostly cloudy, with a high near 34. Southeast wind around 6 mph. Chance of precipitation is 20%.
Thursday Night
A chance of freezing rain before 10pm, then snow showers and freezing rain likely. Cloudy, with a low around 28. Southeast wind 8 to 10 mph. Chance of precipitation is 60%. New ice accumulation of less than a 0.1 of an inch possible. New snow accumulation of less than a half inch possible.
Friday
Freezing rain, possibly mixed with snow showers before 1pm, then rain or freezing rain. High near 34. Southeast wind 8 to 10 mph. Chance of precipitation is 100%.
Friday Night
A chance of rain or freezing rain before 10pm, then a chance of snow showers. Mostly cloudy, with a low around 29. Chance of precipitation is 50%.
Saturday
Mostly cloudy, with a high near 35.
Saturday Night
A chance of snow showers after 1am. Mostly cloudy, with a low around 22. Chance of precipitation is 30%.
Sunday
Snow showers likely, mainly after 1pm. Mostly cloudy, with a high near 28. Chance of precipitation is 60%.
Sunday Night
Snow showers likely, mainly before 1am. Mostly cloudy, with a low around 20. Chance of precipitation is 60%.
Monday
A chance of snow showers. Mostly cloudy, with a high near 28. Chance of precipitation is 40%.
Monday Night
Mostly cloudy, with a low around 10.
Tuesday
Partly sunny, with a high near 18.
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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:
4:59 am EST Feb 18, 2026
Forecast Valid:
6am EST Feb 18, 2026-6pm EST Feb 24, 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