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.

Fair

45°F

7°C

Humidity 71%
Wind Speed Vrbl 3 mph
Barometer 30.03 in (1017.8 mb)
Dewpoint 36°F (2°C)
Visibility 10.00 mi
Last update 17 Feb 3:56 pm EST
Extended Forecast for

Tennanah Lake NY

  • This Afternoon

    This Afternoon: Partly sunny, with a high near 41. Northwest wind around 6 mph.

    High: 41 °F

    Partly Sunny

  • Tonight

    Tonight: Patchy fog after 7pm. Otherwise, mostly cloudy, with a low around 30. Northwest wind around 5 mph becoming calm in the evening.

    Low: 30 °F

    Patchy Fog

  • Wednesday

    Wednesday: A chance of rain or freezing rain before 9am, then rain showers. Patchy fog between 8am and 9am. High near 39. Calm wind becoming southeast around 5 mph in the afternoon. Chance of precipitation is 100%. Little or no ice accumulation expected.

    High: 39 °F

    Rain/Freezing
    Rain and
    Patchy Fog
    then Rain

  • Wednesday Night

    Wednesday Night: Rain likely, possibly mixed with snow before 1am, then a chance of rain between 1am and 4am, then a chance of rain and snow after 4am. Mostly cloudy, with a low around 30. Southeast wind around 7 mph becoming northwest in the evening. Chance of precipitation is 60%. Little or no snow accumulation expected.

    Low: 30 °F

    Rain/Snow
    Likely

  • Thursday

    Thursday: A chance of snow before 7am. Mostly cloudy, with a high near 36. East wind around 6 mph becoming southeast in the afternoon. Chance of precipitation is 30%.

    High: 36 °F

    Chance Snow
    then Mostly
    Cloudy

  • Thursday Night

    Thursday Night: A slight chance of snow showers before 1am, then a chance of snow showers and freezing rain. Mostly cloudy, with a low around 28. Chance of precipitation is 40%.

    Low: 28 °F

    Slight Chance
    Snow Showers
    then Chance
    Wintry Mix

  • Friday

    Friday: Snow showers and freezing rain before 1pm, then rain showers, snow showers, and freezing rain. High near 34. Chance of precipitation is 90%.

    High: 34 °F

    Wintry Mix

  • Friday Night

    Friday Night: A chance of rain showers, snow showers, and freezing rain before 1am, then a chance of snow showers. Mostly cloudy, with a low around 28. Chance of precipitation is 50%.

    Low: 28 °F

    Chance Wintry
    Mix

  • Saturday

    Saturday: A chance of snow showers before 1pm. Partly sunny, with a high near 35. Chance of precipitation is 30%.

    High: 35 °F

    Chance Snow
    Showers

Detailed Forecast

This Afternoon
Partly sunny, with a high near 41. Northwest wind around 6 mph.
Tonight
Patchy fog after 7pm. Otherwise, mostly cloudy, with a low around 30. Northwest wind around 5 mph becoming calm in the evening.
Wednesday
A chance of rain or freezing rain before 9am, then rain showers. Patchy fog between 8am and 9am. High near 39. Calm wind becoming southeast around 5 mph in the afternoon. Chance of precipitation is 100%. Little or no ice accumulation expected.
Wednesday Night
Rain likely, possibly mixed with snow before 1am, then a chance of rain between 1am and 4am, then a chance of rain and snow after 4am. Mostly cloudy, with a low around 30. Southeast wind around 7 mph becoming northwest in the evening. Chance of precipitation is 60%. Little or no snow accumulation expected.
Thursday
A chance of snow before 7am. Mostly cloudy, with a high near 36. East wind around 6 mph becoming southeast in the afternoon. Chance of precipitation is 30%.
Thursday Night
A slight chance of snow showers before 1am, then a chance of snow showers and freezing rain. Mostly cloudy, with a low around 28. Chance of precipitation is 40%.
Friday
Snow showers and freezing rain before 1pm, then rain showers, snow showers, and freezing rain. High near 34. Chance of precipitation is 90%.
Friday Night
A chance of rain showers, snow showers, and freezing rain before 1am, then a chance of snow showers. Mostly cloudy, with a low around 28. Chance of precipitation is 50%.
Saturday
A chance of snow showers before 1pm. Partly sunny, with a high near 35. Chance of precipitation is 30%.
Saturday Night
A chance of snow showers after 1am. Mostly cloudy, with a low around 24. Chance of precipitation is 30%.
Sunday
A chance of snow showers. Mostly cloudy, with a high near 29. Chance of precipitation is 50%.
Sunday Night
A chance of snow showers. Mostly cloudy, with a low around 19. Chance of precipitation is 50%.
Monday
A chance of snow showers. Mostly cloudy, with a high near 27. Chance of precipitation is 40%.
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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:
3:22 pm EST Feb 17, 2026
Forecast Valid:
4pm EST Feb 17, 2026-6pm EST Feb 23, 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