St. John Valley weather for Aug. 15-21, 2018
A cold front will move through the Valley Wednesday with showers and thunderstorms, including a few isolated severe storms. High pressure builds in Thursday and Friday with lower humidity and cooler temperatures. Clouds increase Friday evening as a low-pressure system from the Great Lakes moves east, bringing rain to the region Friday night and Saturday. High pressure builds in Sunday and Monday with partly cloudy to mostly clear skies. Low pressure brings a chance for showers Tuesday.
Daily Weather Summary
Wednesday, August 15: High: 78. Low: 54.
Day: Mostly cloudy with an 80 percent chance for showers and thunderstorms. Isolated severe storms possible. Rainfall totals between one-quarter and one-half inch with locally higher amounts possible. Southwest winds shift to the northwest winds 0 to 5 mph. Night: A 20 percent chance for showers before midnight with partial clearing overnight. Northwest winds 0 to 5 mph.
Thursday, August 16: High: 73. Low: 50.
Day: Partly cloudy with north winds 5 to 10 mph. Night: Mostly clear with light west winds.
Friday, August 17: High: 78. Low: 58.
Day: Mostly clear early then becoming partly cloudy in the afternoon. A 30 percent chance for showers in the evening. Light south winds. Night: Cloudy with a 60 percent chance for showers. Between one-tenth and one-quarter inch rainfall possible. Light southeast winds.
Saturday, August 18: High: 73. Low: 54.
Day: Cloudy in the morning then mostly cloudy in the afternoon with a 50 percent chance for showers. Light northeast winds. Night: Partly cloudy with a 20 percent chance for showers. Light north winds.
Sunday, August 19: High: 77. Low: 54.
Day: Partly cloudy with light northeast winds. Night: Mostly clear with light southeast winds.
Monday, August 20: High: 80. Low: 57.
Day: Mostly clear and warm with light southwest winds. Night: Partly cloudy with light south winds.
Tuesday, August 21: High: 77. Low: 57.
Day: Mostly cloudy with a 50 percent chance for showers. Light southwest winds. Night: Mostly cloudy with a 50 percent chance for showers. Light south winds.
Note: Computer model precision diminishes the further into the week the forecast projects. Check the Fiddlehead Focus for weather updates with more current information.
The Week Ahead is the work of UMFK Professor Joseph E. Becker based on personal weather station data, various computer forecast models, and information that the National Weather Service, NOAA, and other weather resources provide.