Hazardous Weather Conditions
Current conditions at
Monticello, Sullivan County International Airport (KMSV)
Lat: 41.7°NLon: 74.8°WElev: 1404ft.
Mostly Cloudy
87°F
31°C
| Humidity | 42% |
| Wind Speed | Vrbl 6 mph |
| Barometer | 30.09 in (1017.9 mb) |
| Dewpoint | 61°F (16°C) |
| Visibility | 10.00 mi |
| Heat Index | 87°F (31°C) |
| Last update | 18 May 6:56 pm EDT |
Extended Forecast for
Mongaup Valley NY
Tonight

Low: 64 °F
Mostly Clear
Tuesday

High: 91 °F
Mostly Sunny
Tuesday Night

Low: 67 °F
Partly Cloudy
Wednesday

High: 85 °F
Showers
Wednesday Night
Low: 44 °F
Showers then
Partly CloudyThursday

High: 66 °F
Mostly Sunny
Thursday Night

Low: 43 °F
Partly Cloudy
Friday

High: 66 °F
Partly Sunny
Friday Night

Low: 43 °F
Showers
Likely
Detailed Forecast
Tonight
Mostly clear, with a low around 64. Southwest wind around 6 mph becoming calm in the evening.
Tuesday
Mostly sunny, with a high near 91. Light west wind increasing to 5 to 10 mph in the morning. Winds could gust as high as 20 mph.
Tuesday Night
Partly cloudy, with a low around 67. Southwest wind 3 to 5 mph.
Wednesday
Showers likely before 11am, then showers likely and possibly a thunderstorm between 11am and 2pm, then showers after 2pm. High near 85. Northwest wind 6 to 10 mph, with gusts as high as 20 mph. Chance of precipitation is 80%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Wednesday Night
Showers before 8pm. Low around 44. Northwest wind 6 to 8 mph. Chance of precipitation is 80%.
Thursday
Mostly sunny, with a high near 66.
Thursday Night
Partly cloudy, with a low around 43.
Friday
Partly sunny, with a high near 66.
Friday Night
Showers likely, mainly after 2am. Mostly cloudy, with a low around 43. Chance of precipitation is 60%.
Saturday
Showers. High near 58. Chance of precipitation is 80%.
Saturday Night
Showers likely. Cloudy, with a low around 46. Chance of precipitation is 70%.
Sunday
A chance of showers. Mostly cloudy, with a high near 64. Chance of precipitation is 50%.
Sunday Night
A chance of showers. Patchy fog. Otherwise, mostly cloudy, with a low around 49. Chance of precipitation is 40%.
Memorial Day
A chance of showers. Patchy fog. Otherwise, mostly cloudy, with a high near 69. Chance of precipitation is 40%.
Additional Forecasts and Information
Basemap Options
Click map to change the forecast location
Loading map...
ABOUT THIS FORECAST
Point Forecast:
Mongaup Valley NY
41.67°N 74.79°W (Elev. 1175 ft)
41.67°N 74.79°W (Elev. 1175 ft)
6:32 pm EDT May 18, 2026
7pm EDT May 18, 2026-6pm EDT May 25, 2026



