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

Grant Mills NY

  • Tonight

    Tonight: Mostly cloudy, with a low around 52. West wind around 14 mph, with gusts as high as 26 mph.

    Low: 52 °F

    Mostly Cloudy

  • Juneteenth

    Juneteenth: Mostly sunny, with a high near 69. West wind 11 to 13 mph, with gusts as high as 23 mph.

    High: 69 °F

    Mostly Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 50. West wind 10 to 14 mph, with gusts as high as 24 mph.

    Low: 50 °F

    Partly Cloudy

  • Saturday

    Saturday: A slight chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 67. Northwest wind 13 to 15 mph, with gusts as high as 26 mph. Chance of precipitation is 20%.

    High: 67 °F

    Partly Sunny
    then Slight
    Chance
    T-storms

  • Saturday Night

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

    Low: 50 °F

    Mostly Clear

  • Sunday

    Sunday: A slight chance of showers, with thunderstorms also possible after 2pm. Mostly sunny, with a high near 69. Chance of precipitation is 20%.

    High: 69 °F

    Slight Chance
    Showers 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 67. Chance of precipitation is 80%.

    High: 67 °F

    Showers

  • Monday Night

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

    Low: 52 °F

    Showers

Detailed Forecast

Tonight
Mostly cloudy, with a low around 52. West wind around 14 mph, with gusts as high as 26 mph.
Juneteenth
Mostly sunny, with a high near 69. West wind 11 to 13 mph, with gusts as high as 23 mph.
Friday Night
Partly cloudy, with a low around 50. West wind 10 to 14 mph, with gusts as high as 24 mph.
Saturday
A slight chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 67. Northwest wind 13 to 15 mph, with gusts as high as 26 mph. Chance of precipitation is 20%.
Saturday Night
Mostly clear, with a low around 50. West wind 5 to 9 mph.
Sunday
A slight chance of showers, with thunderstorms also possible after 2pm. Mostly sunny, with a high near 69. 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 67. Chance of precipitation is 80%.
Monday Night
Showers and possibly a thunderstorm before 8pm, then showers likely. Low around 52. Chance of precipitation is 80%.
Tuesday
A chance of showers before 8am, then a chance of showers after 2pm. Partly sunny, with a high near 70. Chance of precipitation is 30%.
Tuesday Night
A chance of showers. Partly cloudy, with a low around 52. Chance of precipitation is 30%.
Wednesday
Mostly sunny, with a high near 71.
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:
Grant Mills NY
 42.07°N 74.68°W (Elev. 2320 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