Apex Weather

St. John Valley weather for June 17-23, 2020

Short-Term Outlook: Wednesday – Friday

A large ridge of high pressure centered over the eastern Great Lakes today will bring warm, dry conditions to the Valley through the remainder of the week. Temperatures in the upper 80s today will climb into the lower-to-middle 90s Thursday and Friday with the record high for both days of 93 degrees, set in 1955, at risk both days. This will be a “dry” heat with little moisture aloft, so heat indices are not expected to be a problem at present.

Today & Tonight
Mostly clear with a few clouds in the afternoon. High around 87°. Southwest winds 5 to 10 mph.

Overnight, mostly clear with a low near 60°. West winds 0 to 5 mph.

Thursday, June 18
Sunny and hot with a high near 95°. West winds 5 to 10 mph.

Thursday night, mostly clear with a low near 62° with west wind 0 to 5 mph.

Friday, June 19
Mostly clear and and hot with a high near 95° with west winds 5 to 10 mph.

Friday night, mostly clear with a low near 60° with south winds 0 to 5 mph.

Medium-Range: Saturday – Tuesday

Mostly clear skies and hot conditions continue Saturday on the summer solstice. Partly cloudy skies develop Saturday night as a front dips down from the north bringing a slight chance for showers and thunderstorms by Sunday afternoon into the overnight period. The frontal boundary keeps a chance for mainly afternoon/evening showers and thunderstorms across the SJV Monday under partly sunny skies. Partly sunny skies are expected next Tuesday with increasing chances for showers and a chance for afternoon/evening thunderstorms as a cold front approaches from the west.

Saturday, June 20 / Summer Solstice at 5:44 pm EDT
Partly cloudy with a high in the middle 80s and north/northwest winds 0 to 5 mph.

Saturday night, partly cloudy with a slight chance for precipitation. Low in the upper 50s with southeast winds 0 to 5 mph.

Sunday, June 21
Partly cloudy with a high in the mid-80s and a 20% chance for isolated afternoon/evening showers and thunderstorms. South winds 0 to 5 mph.

Sunday night, partly cloudy with a 20% chance for showers and thunderstorms. Low in the lower 60s. South winds 0 to 5 mph.

Monday, June 22
Partly sunny with a 50% chance for showers and a chance for afternoon/evening thunderstorms. High in the low-to-mid-80s with south winds 0 to 5 mph.

Monday night, partly cloudy with a 50% chance for showers and thunderstorms. Low in the lower 60s. South winds 0 to 5 mph.

Tuesday, June 23
Partly sunny with a 60% chance for showers and a chance for afternoon/evening thunderstorms. High in the low 80s with southwest winds 5 to 10 mph.

Tuesday night, partly cloudy with a 50% chance for showers and thunderstorms. Low in the lower 60s with southwest winds 0 to 5 mph.

Regional Long-Range Trends: Wed. June 24 – Tue. June 30

Above 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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