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.

Light Rain

51°F

11°C

Humidity 64%
Wind Speed NW 7 mph
Barometer 30.18 in (1021.9 mb)
Dewpoint 39°F (4°C)
Visibility 10.00 mi
Wind Chill48°F (9°C)
Last update 21 May 5:56 am EDT
Extended Forecast for

Thompsonville NY

  • Today

    Today: A slight chance of showers before 9am. Mostly cloudy, with a high near 64. Light and variable wind. Chance of precipitation is 20%.

    High: 64 °F

    Slight Chance
    Showers then
    Mostly Cloudy

  • Tonight

    Tonight: Mostly cloudy, then gradually becoming mostly clear, with a low around 42. Calm wind.

    Low: 42 °F

    Decreasing
    Clouds

  • Friday

    Friday: Mostly sunny, with a high near 67. East wind around 7 mph.

    High: 67 °F

    Mostly Sunny

  • Friday Night

    Friday Night: A slight chance of showers after 2am. Increasing clouds, with a low around 43. Calm wind. Chance of precipitation is 20%.

    Low: 43 °F

    Mostly Cloudy
    then Slight
    Chance
    Showers

  • Saturday

    Saturday: Showers, mainly after 8am. High near 54. East wind 6 to 10 mph, with gusts as high as 20 mph. Chance of precipitation is 90%.

    High: 54 °F

    Showers

  • Saturday Night

    Saturday Night: Showers. Low around 41. Chance of precipitation is 90%.

    Low: 41 °F

    Showers

  • Sunday

    Sunday: Showers likely before 2pm. Mostly cloudy, with a high near 59. Chance of precipitation is 60%.

    High: 59 °F

    Showers
    Likely

  • Sunday Night

    Sunday Night: Cloudy, with a low around 48.

    Low: 48 °F

    Cloudy

  • Memorial Day

    Memorial Day: A chance of showers. Mostly cloudy, with a high near 72. Chance of precipitation is 50%.

    High: 72 °F

    Chance
    Showers

Detailed Forecast

Today
A slight chance of showers before 9am. Mostly cloudy, with a high near 64. Light and variable wind. Chance of precipitation is 20%.
Tonight
Mostly cloudy, then gradually becoming mostly clear, with a low around 42. Calm wind.
Friday
Mostly sunny, with a high near 67. East wind around 7 mph.
Friday Night
A slight chance of showers after 2am. Increasing clouds, with a low around 43. Calm wind. Chance of precipitation is 20%.
Saturday
Showers, mainly after 8am. High near 54. East wind 6 to 10 mph, with gusts as high as 20 mph. Chance of precipitation is 90%.
Saturday Night
Showers. Low around 41. Chance of precipitation is 90%.
Sunday
Showers likely before 2pm. Mostly cloudy, with a high near 59. Chance of precipitation is 60%.
Sunday Night
Cloudy, with a low around 48.
Memorial Day
A chance of showers. Mostly cloudy, with a high near 72. Chance of precipitation is 50%.
Monday Night
Mostly cloudy, with a low around 53.
Tuesday
Partly sunny, with a high near 77.
Tuesday Night
Partly cloudy, with a low around 55.
Wednesday
Mostly sunny, with a high near 78.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Thompsonville NY
 41.67°N 74.61°W (Elev. 1247 ft)
Last Update:
2:30 am EDT May 21, 2026
Forecast Valid:
6am EDT May 21, 2026-6pm EDT May 27, 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