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

63°F

17°C

Humidity 90%
Wind Speed Calm
Barometer 29.99 in (1015.0 mb)
Dewpoint 60°F (16°C)
Visibility 10.00 mi
Last update 20 Aug 12:56 am EDT
Extended Forecast for

Colchester NY

  • Overnight

    Overnight: Areas of fog. Otherwise, mostly cloudy, with a low around 56. Calm wind.

    Low: 56 °F

    Areas Fog

  • Thursday

    Thursday: Showers likely, mainly between noon and 5pm. Areas of fog before 10am. Otherwise, mostly cloudy, with a high near 74. Calm wind. Chance of precipitation is 60%. New precipitation amounts between a tenth and quarter of an inch possible.

    High: 74 °F

    Areas Fog
    then Showers
    Likely

  • Thursday Night

    Thursday Night: A chance of showers before 8pm. Patchy fog between 4am and 5am. Otherwise, mostly cloudy, then gradually becoming mostly clear, with a low around 51. Calm wind. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch possible.

    Low: 51 °F

    Chance
    Showers then
    Patchy Fog

  • Friday

    Friday: Areas of fog between 7am and 9am. Otherwise, sunny, with a high near 78. Light northeast wind.

    High: 78 °F

    Areas Fog
    then Sunny

  • Friday Night

    Friday Night: Patchy fog after 4am. Otherwise, partly cloudy, with a low around 56. Calm wind.

    Low: 56 °F

    Partly Cloudy
    then Patchy
    Fog

  • Saturday

    Saturday: A chance of showers, then showers likely and possibly a thunderstorm after 2pm. Patchy fog before 9am. Otherwise, partly sunny, with a high near 77. Chance of precipitation is 60%.

    High: 77 °F

    Chance
    Showers and
    Patchy Fog
    then Showers
    Likely

  • Saturday Night

    Saturday Night: Showers likely, mainly before 8pm. Mostly cloudy, with a low around 59. Chance of precipitation is 60%.

    Low: 59 °F

    Showers
    Likely

  • Sunday

    Sunday: Showers likely, then showers and possibly a thunderstorm after 2pm. High near 76. Chance of precipitation is 80%.

    High: 76 °F

    Showers

  • Sunday Night

    Sunday Night: Showers and possibly a thunderstorm before 8pm. Low around 52. Chance of precipitation is 80%.

    Low: 52 °F

    Showers then
    Partly Cloudy

Detailed Forecast

Overnight
Areas of fog. Otherwise, mostly cloudy, with a low around 56. Calm wind.
Thursday
Showers likely, mainly between noon and 5pm. Areas of fog before 10am. Otherwise, mostly cloudy, with a high near 74. Calm wind. Chance of precipitation is 60%. New precipitation amounts between a tenth and quarter of an inch possible.
Thursday Night
A chance of showers before 8pm. Patchy fog between 4am and 5am. Otherwise, mostly cloudy, then gradually becoming mostly clear, with a low around 51. Calm wind. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch possible.
Friday
Areas of fog between 7am and 9am. Otherwise, sunny, with a high near 78. Light northeast wind.
Friday Night
Patchy fog after 4am. Otherwise, partly cloudy, with a low around 56. Calm wind.
Saturday
A chance of showers, then showers likely and possibly a thunderstorm after 2pm. Patchy fog before 9am. Otherwise, partly sunny, with a high near 77. Chance of precipitation is 60%.
Saturday Night
Showers likely, mainly before 8pm. Mostly cloudy, with a low around 59. Chance of precipitation is 60%.
Sunday
Showers likely, then showers and possibly a thunderstorm after 2pm. High near 76. Chance of precipitation is 80%.
Sunday Night
Showers and possibly a thunderstorm before 8pm. Low around 52. Chance of precipitation is 80%.
Monday
Mostly sunny, with a high near 72.
Monday Night
Partly cloudy, with a low around 50.
Tuesday
Mostly sunny, with a high near 74.
Tuesday Night
Partly cloudy, with a low around 53.
Wednesday
Mostly sunny, with a high near 77.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Colchester NY
 42.16°N 75.08°W (Elev. 1424 ft)
Last Update:
1:16 am EDT Aug 20, 2026
Forecast Valid:
1am 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