Apex Weather

St. John Valley weather for Aug. 19-25, 2020

Short-Term Outlook: Wednesday – Friday

Partly sunny skies are expected across the Upper St. John Valley today as an upper-level low slides east towards the Maritimes and draws an upper trough across the region. 

Lapse rates (drop in temperature with height) will allow for gusty west/northwest winds with Frenchville Airport seeing gusts in the 25-35 mph range this afternoon. Enough moisture is available aloft for some isolated to scattered showers activity this afternoon with light precipitation totals for any locations seeing rainfall this afternoon. Showers are expected to linger into the evening hours as the upper trough slides east of the region. Partly cloudy and dry conditions are expected Thursday as a surface ridge of high pressure moves into the Middle Atlantic region. A frontal boundary is expected to set up near or along the northern Maine border Friday which will introduce a chance for some shower activity under partly sunny to partly cloudy skies Friday and Friday night.

Today & Tonight 

Partly sunny with a 30 percent chance for isolated/scattered showers in the afternoon. Rainfall less than 1/10-inch. High near 70 degrees  degrees F with west winds 5 to 10 mph with gusts to 20 to 25 mph in Fort Kent and 25-35 mph in Frenchville.

Overnight, partly cloudy with a low around 49 degrees F.  30 percent chance for showers in the evening with less than 1/10-inch expected. West winds 5 to 10 mph.

Thursday, August 20

Mostly sunny with a 5 percent chance for precipitation. High near 70 degrees F with northwest winds 10 to 15 mph with gusts to around 20 mph possible.

Thursday night, mostly clear to partly cloudy with a 30 percent chance for showers after midnight. Rainfall amounts less than 1/10-inch expected. Low around 51 degrees F with west winds 0 to 5 mph.

Friday, August 21 

Partly sunny with a 40 percent chance for showers in the afternoon. Rainfall totals less than 1/10-inch expected. High in the low 70s with west winds 5 to 10 mph.

Friday night, partly cloudy with a low in the  lower 50s. 30 percent chance for showers. West/southwest winds 0 to 5 mph.

Medium-Range: Saturday – Tuesday

Forecast uncertainty increases this weekend as the position of the front and hard-to-time disturbances in the westerly flow across the region keep a chance for showers across the Fort Kent region throughout the period driven, in part, by daytime heating. A cold front looks to move through Tuesday with higher chances for afternoon showers across the Valley.

Saturday, August 22

Partly sunny in the morning then partly cloudy in the afternoon with a 30 percent chance for showers. High in the mid-70s with west winds 0 to 7 mph.

Saturday night, partly cloudy with a 30 percent chance for showers. Low in the mid-50s with west winds 0 to 7 mph.

Sunday, August 23

Mostly cloudy with a 50 percent chance for showers. High in the upper 70s with southwest winds 0 to 7 mph.

Sunday night, partly cloudy with a 40 percent chance for showers. Low in the mid-50s with west winds 0 to 7 mph.

Monday, August 24

Partly sunny with a 30 percent chance for showers. High in the mid-70s with northwest winds 0 to 7 mph.

Monday night, mostly cloudy with a 30 percent chance for showers. Low in the mid-50s with west winds 0 to 7 mph.

Tuesday, August 25

Partly sunny to mostly cloudy with a 50 percent chance for showers, mainly in the afternoon. High in the mid-70s with northwest winds 0 to 7 mph.

Tuesday night, partly cloudy with a 40 percent chance for showers. Low in the mid-50s with northwest winds 0 to 7 mph.

Regional Long-Range Trends: Wed. Aug. 26 – Tue. Sep. 1

Below normal temperatures and slightly above 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.

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