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.

Overcast

26°F

-3°C

Humidity 60%
Wind Speed S 7 mph
Barometer 30.25 in (1026.1 mb)
Dewpoint 14°F (-10°C)
Visibility 10.00 mi
Wind Chill18°F (-8°C)
Last update 19 Mar 1:56 am EDT
Extended Forecast for

Tennanah Lake NY

  • Overnight

    Overnight: Mostly cloudy, with a low around 20. South wind around 7 mph.

    Low: 20 °F

    Mostly Cloudy

  • Thursday

    Thursday: Mostly cloudy, with a high near 37. South wind around 9 mph.

    High: 37 °F

    Mostly Cloudy

  • Thursday Night

    Thursday Night: Mostly cloudy, with a low around 26. Southwest wind around 6 mph becoming northwest after midnight.

    Low: 26 °F

    Mostly Cloudy

  • Friday

    Friday: Rain likely after 2pm. Mostly cloudy, with a high near 48. Light and variable wind becoming south 5 to 10 mph in the morning. Winds could gust as high as 20 mph. Chance of precipitation is 60%. New precipitation amounts between a tenth and quarter of an inch possible.

    High: 48 °F

    Mostly Cloudy
    then Rain
    Likely

  • Friday Night

    Friday Night: Rain likely before 2am, then a chance of showers after 2am. Mostly cloudy, with a low around 36. South wind around 10 mph becoming west after midnight. Chance of precipitation is 70%.

    Low: 36 °F

    Rain Likely

  • Saturday

    Saturday: A chance of showers before 8am. Partly sunny, with a high near 48. Chance of precipitation is 30%.

    High: 48 °F

    Chance
    Showers then
    Mostly Sunny

  • Saturday Night

    Saturday Night: Mostly cloudy, with a low around 33.

    Low: 33 °F

    Mostly Cloudy

  • Sunday

    Sunday: A chance of rain after 2pm. Mostly cloudy, with a high near 51. Chance of precipitation is 50%.

    High: 51 °F

    Mostly Cloudy
    then Chance
    Rain

  • Sunday Night

    Sunday Night: Rain likely before 2am, then a chance of rain and snow. Mostly cloudy, with a low around 26. Chance of precipitation is 60%.

    Low: 26 °F

    Rain Likely
    then
    Rain/Snow
    Likely

Detailed Forecast

Overnight
Mostly cloudy, with a low around 20. South wind around 7 mph.
Thursday
Mostly cloudy, with a high near 37. South wind around 9 mph.
Thursday Night
Mostly cloudy, with a low around 26. Southwest wind around 6 mph becoming northwest after midnight.
Friday
Rain likely after 2pm. Mostly cloudy, with a high near 48. Light and variable wind becoming south 5 to 10 mph in the morning. Winds could gust as high as 20 mph. Chance of precipitation is 60%. New precipitation amounts between a tenth and quarter of an inch possible.
Friday Night
Rain likely before 2am, then a chance of showers after 2am. Mostly cloudy, with a low around 36. South wind around 10 mph becoming west after midnight. Chance of precipitation is 70%.
Saturday
A chance of showers before 8am. Partly sunny, with a high near 48. Chance of precipitation is 30%.
Saturday Night
Mostly cloudy, with a low around 33.
Sunday
A chance of rain after 2pm. Mostly cloudy, with a high near 51. Chance of precipitation is 50%.
Sunday Night
Rain likely before 2am, then a chance of rain and snow. Mostly cloudy, with a low around 26. Chance of precipitation is 60%.
Monday
A chance of rain and snow before 8am. Mostly cloudy, with a high near 35. Chance of precipitation is 30%.
Monday Night
Partly cloudy, with a low around 19.
Tuesday
Mostly sunny, with a high near 36.
Tuesday Night
Partly cloudy, with a low around 24.
Wednesday
Mostly sunny, with a high near 41.
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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:
1:12 am EDT Mar 19, 2026
Forecast Valid:
1am EDT Mar 19, 2026-6pm EDT Mar 25, 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