Apex Weather

St. John Valley Weather for Aug. 28-Sept. 3, 2019 |

ST. JOHN VALLEY, Maine — High pressure will slide eastwards into the Atlantic today while a cold front over the eastern Great Lakes approaches the Valley with rain expected tonight as the front moves through.

Showers taper off tomorrow afternoon with partly cloudy skies developing as high pressure to the south briefly builds in. Another cold front brings increased clouds and a slight chance for shower Friday afternoon into the evening hours. High pressure builds across the Valley Saturday and Sunday with partly cloudy to mostly clear skies. Partly cloudy skies Labor Day give way to increasing clouds later Monday as a cold front drops down from the northwest producing a chance for showers Monday evening and Tuesday.

Daily Weather Summary 

Wednesday, August 28
Mostly clear through the afternoon then increasing clouds in the evening. High near 80 with south/southeast winds near calm in the morning increasing to near 10 mph this afternoon with gusts to around 15 mph possible. Tonight, mostly cloudy early then overcast after midnight with a 90 percent chance for rain. Rainfall totals between 3/4 and 1 inch expected. Low in the middle 50s with south/southeast winds near 5 mph.

Thursday, August 29
Cloudy in the morning with a 100 percent chance for rain tapering to showers in the afternoon. Precipitation totals in the 1/4 to 1/2 inch range expected. High in the middle 60s with southeast winds near calm gusting to around 5 mph. Thursday night, partly cloudy with a low in the middle 50s. Southeast winds shift to the west 0 to 5 mph

Friday, August 30
Mostly clear to partly cloudy in the morning then partly sunny in the afternoon with a 20 percent chance for afternoon/evening showers. High in the lower 70s with southwest winds 5 to 10 mph with gusts 15 to 20 mph possible. Friday night, partly cloudy with a 20 percent chance for showers. Low in the middle 50s with west winds 0 to 5 mph.

Saturday, August 31
Partly cloudy with a slight chance for showers in the afternoon. High in the middle 60s with northwest winds 5 to 10 mph. Saturday night, mostly clear with a low in the lower 40s. Northwest winds 0 to 5 mph.

Sunday, September 1
Mostly clear with a high in the upper 60s. Southwest winds 0 to 5 mph. Sunday night, partly cloudy with a low in the upper 40s. South winds 0 to 5 mph.

Monday, September 2 / Labor Day
Partly cloudy with a slight chance for afternoon/evening showers. High in the low 70s with southwest winds around 5 to 10 mph. Monday night, partly cloudy with a 30 percent chance for showers. Low in the mid-50s with southwest winds 0 to 5 mph.

Tuesday, September 3
Partly sunny with a 40 percent chance for showers. High in the low 70s with southwest winds 0 to 5 mph. Tuesday night, mostly cloudy with a 30 percent chance for showers. Low in the mid-50s with southwest winds 0 to 5 mph.

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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