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.

Fair

60°F

16°C

Humidity 96%
Wind Speed Calm
Barometer 30.00 in (1015.2 mb)
Dewpoint 59°F (15°C)
Visibility 10.00 mi
Last update 20 Aug 2:56 am EDT
Extended Forecast for

Grant Mills NY

  • Overnight

    Overnight: Partly cloudy, with a low around 55. Calm wind.

    Low: 55 °F

    Partly Cloudy

  • Thursday

    Thursday: Showers likely, mainly after 2pm. Patchy fog before 9am. Otherwise, mostly cloudy, with a high near 70. Light and variable wind. Chance of precipitation is 60%. New precipitation amounts between a tenth and quarter of an inch possible.

    High: 70 °F

    Patchy Fog
    then Showers
    Likely

  • Thursday Night

    Thursday Night: A chance of showers, mainly before 8pm. Partly cloudy, with a low around 50. Calm wind. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch possible.

    Low: 50 °F

    Chance
    Showers then
    Partly Cloudy

  • Friday

    Friday: Mostly sunny, with a high near 74. Light northeast wind.

    High: 74 °F

    Mostly Sunny

  • Friday Night

    Friday Night: A chance of showers after 2am. Mostly cloudy, with a low around 55. Calm wind. Chance of precipitation is 30%.

    Low: 55 °F

    Partly Cloudy
    then Chance
    Showers

  • Saturday

    Saturday: A chance of showers, with thunderstorms also possible after 2pm. Partly sunny, with a high near 70. Chance of precipitation is 50%.

    High: 70 °F

    Chance
    Showers

  • Saturday Night

    Saturday Night: A chance of showers before 2am. Mostly cloudy, with a low around 56. Chance of precipitation is 40%.

    Low: 56 °F

    Chance
    Showers

  • Sunday

    Sunday: Showers likely and possibly a thunderstorm, mainly after 2pm. Mostly cloudy, with a high near 73. Chance of precipitation is 70%.

    High: 73 °F

    Chance
    Showers then
    Showers
    Likely

  • Sunday Night

    Sunday Night: Showers likely and possibly a thunderstorm before 8pm. Partly cloudy, with a low around 51. Chance of precipitation is 60%.

    Low: 51 °F

    Showers
    Likely then
    Partly Cloudy

Detailed Forecast

Overnight
Partly cloudy, with a low around 55. Calm wind.
Thursday
Showers likely, mainly after 2pm. Patchy fog before 9am. Otherwise, mostly cloudy, with a high near 70. Light and variable wind. Chance of precipitation is 60%. New precipitation amounts between a tenth and quarter of an inch possible.
Thursday Night
A chance of showers, mainly before 8pm. Partly cloudy, with a low around 50. Calm wind. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch possible.
Friday
Mostly sunny, with a high near 74. Light northeast wind.
Friday Night
A chance of showers after 2am. Mostly cloudy, with a low around 55. Calm wind. Chance of precipitation is 30%.
Saturday
A chance of showers, with thunderstorms also possible after 2pm. Partly sunny, with a high near 70. Chance of precipitation is 50%.
Saturday Night
A chance of showers before 2am. Mostly cloudy, with a low around 56. Chance of precipitation is 40%.
Sunday
Showers likely and possibly a thunderstorm, mainly after 2pm. Mostly cloudy, with a high near 73. Chance of precipitation is 70%.
Sunday Night
Showers likely and possibly a thunderstorm before 8pm. Partly cloudy, with a low around 51. Chance of precipitation is 60%.
Monday
Mostly sunny, with a high near 69.
Monday Night
Mostly clear, with a low around 49.
Tuesday
Mostly sunny, with a high near 70.
Tuesday Night
Partly cloudy, with a low around 51.
Wednesday
Mostly sunny, with a high near 73.
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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:
2:30 am EDT Aug 20, 2026
Forecast Valid:
3am EDT Aug 20, 2026-6pm EDT Aug 26, 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