Apex Weather

St. John Valley weather for July 15-21, 2020

Short-Term Outlook: Wednesday – Friday

A ridge of high pressure will build across the Valley today with sunny skies and mild conditions. Clear skies tonight will give way to partly cloudy skies as high pressure moves east of the region.

Skies become partly cloudy Thursday then mostly cloudy Thursday night as a warm front lifts across the SJV with a chance for showers after midnight. The warm front will bring a chance for showers, especially in the afternoon along with a slight chance for thunderstorms. A cold front will move through later Friday with showers and a slight chance for thunderstorms Friday night with decreasing chances for precipitation as the night progresses.

Today & Tonight
Sunny with a high in the mid-70s. East/northeast winds 5 to 10 mph.

Overnight, mostly clear with lows in the mid-40s. Patchy fog possible after midnight. Southeast winds 0 to 5 mph

Thursday, July 16
Partly cloudy with a high in the mid-70s. Southeast winds around 0 to 5 mph.

Thursday night, partly cloudy in the evening then mostly cloudy after midnight with a 40 percent chance for showers. Low in the mid-50s with south winds 0 to 5 mph.

Friday, July 17
Cloudy with an 80 percent chance for showers and a chance for isolated thunderstorms. Rainfall totals between 1/4 and 1/2-inch possible. High in the mid-60s with south winds 5 to 10 mph.

Friday night, showers likely with a 70 percent chance for precipitation along with a slight chance for thunderstorms. Low in the low 60s with southwest winds 0 to 5 mph.

Medium-Range: Saturday – Tuesday

A ridge of high pressure will build across Fort Kent and the SJV Saturday into Sunday with warmer and more humid conditions returning. Daytime heating will produce a chance for afternoon/evening showers and thunderstorms Saturday and Sunday. A cold front approaches Monday with a chance for showers and afternoon/evening thunderstorms along and ahead of the front.  The front will slowly move towards the coast with high pressure building across the north Tuesday into Wednesday.

Saturday, July 18
Mostly cloudy in the morning then partly cloudy with a 30 percent chance for showers and a chance for afternoon thunderstorms. Warmer and more humid with a high in the mid-80s. West/southwest winds 5 to 10 mph.

Saturday night, partly cloudy with a slight chance for showers and thunderstorms in the evening. Low in the low 60s with southwest winds 0 to 5 mph.

Sunday, July 19

Partly cloudy to partly sunny, warm, and humid with a high in the mid-80s. 30 percent chance for afternoon/evening showers and thunderstorms. South/southwest winds 5 to 10 mph.

Sunday night, partly cloudy with a 40 percent chance for showers and thunderstorms. Low in the mid-60s with southwest winds 0 to 5 mph.

Monday, July 20

Partly sunny and humid with a 50 percent chance for showers and thunderstorms. High in the lower 80s with west winds 5 to 10 mph.

Monday night, partly cloudy with a 40 percent chance for showers and thunderstorms.  Low in the lower 60s with northwest winds 0 to 5 mph.

Tuesday, July 21

Partly cloudy with a 40 percent chance for showers. Less humid with a high in the low 80s. Northwest winds 5 to 10 mph.

Tuesday night, partly cloudy with a slight chance for showers. Low in the mid-50s with west/southwest winds 0 to 5 mph.

Regional Long-Range Trends: Wed. July 22 – Tue. July 28

Slightly above normal temperatures and 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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