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.

Mostly Cloudy

70°F

21°C

Humidity 68%
Wind Speed W 10 mph
Barometer 29.63 in (1002.3 mb)
Dewpoint 59°F (15°C)
Visibility 10.00 mi
Last update 18 Jun 9:56 pm EDT
Extended Forecast for

Grooville NY

  • Tonight

    Tonight: Increasing clouds, with a low around 52. West wind around 11 mph, with gusts as high as 24 mph.

    Low: 52 °F

    Increasing
    Clouds

  • Juneteenth

    Juneteenth: Mostly sunny, with a high near 70. West wind 11 to 13 mph.

    High: 70 °F

    Mostly Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 51. West wind 10 to 13 mph.

    Low: 51 °F

    Partly Cloudy

  • Saturday

    Saturday: A slight chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 68. Northwest wind around 14 mph, with gusts as high as 25 mph. Chance of precipitation is 20%.

    High: 68 °F

    Mostly Sunny
    then Slight
    Chance
    T-storms

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 50. Northwest wind 5 to 9 mph.

    Low: 50 °F

    Mostly Clear

  • Sunday

    Sunday: A slight chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 71. Chance of precipitation is 20%.

    High: 71 °F

    Sunny then
    Slight Chance
    T-storms

  • Sunday Night

    Sunday Night: A chance of showers after 2am. Partly cloudy, with a low around 51. Chance of precipitation is 30%.

    Low: 51 °F

    Partly Cloudy
    then Chance
    Showers

  • Monday

    Monday: Showers likely, then showers and possibly a thunderstorm after 2pm. High near 68. Chance of precipitation is 80%.

    High: 68 °F

    Showers

  • Monday Night

    Monday Night: Showers and possibly a thunderstorm before 8pm, then a chance of showers. Low around 52. Chance of precipitation is 80%.

    Low: 52 °F

    Showers then
    Chance
    Showers

Detailed Forecast

Tonight
Increasing clouds, with a low around 52. West wind around 11 mph, with gusts as high as 24 mph.
Juneteenth
Mostly sunny, with a high near 70. West wind 11 to 13 mph.
Friday Night
Partly cloudy, with a low around 51. West wind 10 to 13 mph.
Saturday
A slight chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 68. Northwest wind around 14 mph, with gusts as high as 25 mph. Chance of precipitation is 20%.
Saturday Night
Mostly clear, with a low around 50. Northwest wind 5 to 9 mph.
Sunday
A slight chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 71. Chance of precipitation is 20%.
Sunday Night
A chance of showers after 2am. Partly cloudy, with a low around 51. Chance of precipitation is 30%.
Monday
Showers likely, then showers and possibly a thunderstorm after 2pm. High near 68. Chance of precipitation is 80%.
Monday Night
Showers and possibly a thunderstorm before 8pm, then a chance of showers. Low around 52. Chance of precipitation is 80%.
Tuesday
Partly sunny, with a high near 70.
Tuesday Night
Partly cloudy, with a low around 52.
Wednesday
Mostly sunny, with a high near 72.
Wednesday Night
Partly cloudy, with a low around 53.
Thursday
Showers likely and possibly a thunderstorm. Partly sunny, with a high near 71. Chance of precipitation is 60%.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Grooville NY
 41.95°N 74.76°W (Elev. 2156 ft)
Last Update:
7:51 pm EDT Jun 18, 2026
Forecast Valid:
10pm EDT Jun 18, 2026-6pm EDT Jun 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