St. John Valley weather for Aug. 4-10, 2021
Short-Term Outlook: Wednesday – Friday
A weak cold front moved over the region last night and stalled out. The system is expected to dissipate today with partly sunny skies and a slight chance of isolated afternoon showers. Partly cloudy skies with some patchy fog are anticipated overnight.
An off-shore front with subtropical moisture will back towards New England Thursday with an area of low pressure running along it. This system looks to bring a chance for rain, mainly in the afternoon, to the Valley, though the northern extent of precipitation from this system is still uncertain. Any rain that occurs tapers to showers Thursday evening with partly cloudy skies developing overnight into Friday.
A chance for isolated showers Friday morning ends by midday with mostly sunny skies developing Friday afternoon continuing overnight into Saturday.
Today & Tonight
Partly sunny with a 20 percent chance for isolated afternoon showers. High near 78 degrees with west-northwest winds 0-5 mph.
Tonight, partly cloudy with a 10 percent chance for isolated showers. Patchy fog possible after midnight. Low around 58 degrees with southeast winds near calm.
Thursday, August 5
Partly cloudy early then partly sunny with a 60 percent chance for rain, mainly in the afternoon. Rainfall totals less than 0.10-inch. High near 75 degrees with south-southeast winds near 5 mph.
Thursday night, partly cloudy with a 20 percent chance for isolated showers. Patchy fog possible after midnight. Low near 57 degrees with south-southwest winds near calm.
Friday, August 6
Partly cloudy in the morning then becoming mostly sunny with a 20 percent chance for isolated showers ending by the afternoon. High near 85 degrees with southwest winds 5-10 mph.
Friday night, mostly clear with a 10 percent chance for showers. Low around 60 degrees with southwest winds 0-7 mph.
Medium-Range Outlook: Saturday – Tuesday
Clouds increase Saturday morning as a cold front approaches from the northwest bringing a chance for afternoon showers and thunderstorms to the SJV. Canadian high pressure will build down from the north Sunday with a chance for showers continuing across the region Sunday and Monday. Partly sunny skies develop Tuesday as a warm front lifts across the region providing an opportunity for scattered showers across the region.
Saturday, August 7
Becoming partly cloudy in the morning then mostly cloudy in the afternoon with a 60 percent chance for showers and isolated afternoon thunderstorms. High around 82 degrees with southwest winds 8-14 mph.
Saturday night, partly cloudy with a 50 percent chance for showers and evening thunderstorms. Low near 57 degrees with northwest winds 0-7 mph.
Sunday, August 8
Partly sunny with a 50 percent chance for showers. High near 75 degrees with northeast winds 0-7 mph.
Sunday night, partly cloudy with a 40 percent chance for showers. Low around 56 degrees with southeast winds 0-7 mph.
Monday, August 9
Partly cloudy with a 30 percent chance for scattered showers. High around 80 degrees with south winds 0-7 mph.
Monday night, partly cloudy with a 40 percent chance for showers. Low around 60 degrees with south winds 0-7 mph.
Tuesday, August 10
Partly sunny with a 40 percent chance for showers. High near 82 degrees with south winds 0-7 mph.
Tuesday night, mostly cloudy with a 50 percent chance for showers. Low near 62 degrees with southwest winds 0-7 mph.
Long-Range Trends: Wed. Aug. 11 – Mon. Aug. 16
Above normal temperatures / Near normal precipitation
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.