Apex Weather

St. John Valley weather for April 14-20, 2021

Low pressure south of Nova Scotia and its associated upper-level low pressure area will continue to draw moisture over the area aloft keeping plenty of clouds as well as a chance for some scattered showers through the afternoon. 

Tonight, clouds decrease as the low moves further away and high pressure to the northwest begins to push into the region along with an upper-level ridge shifting to the east. Partly sunny daytime and partly cloudy nighttime skies are expected through Friday night.

High pressure will bring mostly sunny skies to the Valley today and mostly clear skies tonight. Mostly sunny skies Thursday become partly cloudy Thursday night. Low pressure moving east off Cape Cod Friday will slowly track east with partly sunny to mostly cloudy skies Friday and a chance for rain and snow Friday night into Saturday.

Wednesday, April 14 

Mostly sunny with a high around 60 degrees F. Northeast winds at 0 to 5 mph.

Wednesday night, mostly clear with a low near 30 degrees F. East/southeast winds near calm. 

Thursday, April 15

Mostly sunny with a high around 60 degrees . East winds 5 to 10 mph.

Thursday night, partly cloudy with a low around 30 degrees . Chance for precipitation 5 percent. East winds 0 to 5 mph. 

Friday, April 16

Partly cloudy in the morning then becoming partly sunny with a 10 percent chance for isolated showers. High near 51 degrees  with east/northeast winds 10 to 15 mph gusting to around 20 mph.

Friday night, partly cloudy with a 50 percent chance for scattered snow and rain showers after midnight. Low around 31 degrees  with northeast winds 5 to 10 mph.

Medium Range Outlook: Saturday – Tuesday

Low pressure tracks east across the Gulf of Maine Saturday with a chance for rain and snow showers through the day. Precipitation ends Saturday night with partly sunny skies expected Sunday with decreasing cloudiness by Monday. A slow moving cold front to the northwest brings a chance for mainly afternoon rain showers Monday into Monday night. Partly cloudy to partly sunny skies continue Tuesday with a chance for rain showers as an upper trough moves across the Valley.

Saturday, April 17

Mostly cloudy with a 40 percent chance for scattered snow showers in the morning and rain/snow showers in the afternoon. High near 46 degrees F. Northeast winds 5 to 10 mph.

Saturday night, mostly cloudy early then becoming partly cloudy with a 5 percent chance for rain/snow showers. Low around 31 degrees  with north/northeast winds 0 to 5 mph.

Sunday, April 18

Partly sunny with a 5 percent chance for precipitation. High near 53 degrees F with northwest winds 5 to 10 mph.

Sunday night, partly cloudy with a 20 percent chance for rain/snow showers. Low around 32 degrees  with west/northwest winds 0 to 5 mph.

Monday, April 19 / Patriot’s Day

Partly cloudy to partly sunny with a 30 percent chance for rain showers mixing with morning snow showers. High around 58 degrees F with northwest winds 5 to 10 mph.

Monday night, partly cloudy with a 40 percent chance for rain showers. Low near 35 degrees  with northwest winds 0 to 5 mph.

Tuesday, April 20

Partly cloudy to partly sunny with a 40 percent chance for rain showers. High around 58 degrees  with southwest winds 5 to 10 mph.

Tuesday night, mostly cloudy with a 40 percent chance for rain showers. Low near 35 degrees  with west/southwest winds 0 to 5 mph.

Long-Range Trends: Tue. Apr. 20 –  Sat. Apr. 24
Normal temperatures   /  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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