Apex Weather

St. John Valley Weather for July 29-August 4, 2020

Short-term outlook: Wednesday through Friday

An upper-level trough will slide across the region today through Friday. Weak disturbances in the trough will cross the Valley today and Thursday with a slight chance for afternoon thunderstorms today and a better chance Thursday afternoon. The trough will shift east Friday evening with showers and a slight chance for thunderstorms Friday afternoon. High pressure builds into the SJV Saturday into Sunday with drier conditions and partly cloudy skies. 

Today and tonight

Partly sunny with isolated showers in the morning then a chance for showers and a chance for showers and isolated thunderstorms in the afternoon. Chance for precipitation 40 percent. Rainfall totals less than 1/10-inch anticipated. High in the low 80s with west/southwest winds 0 to 5 mph.

Wednesday night, partly cloudy with a 40 percent chance for showers. Rainfall totals between 1/10 and 1/4-inch possible. Low in the lower 60s with light, variable winds near calm overnight.

Thursday, July 30

Partly sunny early then mostly cloudy with a chance for showers in the morning then showers likely and a chance for thunderstorms in the afternoon. Chance for precipitation 60 percent with around 1/10 to 1/4-inch anticipated. High in the mid-70s with northwest winds 5o to 10 mph.

Thursday night, mostly cloudy with a chance for showers and evening thunderstorms then a slight chance for showers after midnight. Less than 1/10-inch accumulation. Low in the mid-50s with northwest winds 0 to 5 mph. Some patchy fog expected after midnight.

Friday, July 31

Partly sunny with a chance for showers in the morning then showers and a slight chance for thunderstorms in the afternoon. Rainfall totals around 1/10-inch. High in the mid-70s with northwest winds 5 to 10 mph.

Friday night, partly cloudy with a chance for showers and a slight chance for thunderstorms in the evening. Low in the mid-50s with northwest winds 0 to 5 mph.

Medium-Range: Saturday – Tuesday

Partly cloudy skies develop over the Valley Saturday with less muggy dew points. Partly cloudy skies continue Saturday night into Sunday morning before increased cloudiness develops Sunday afternoon as a cold front approaches from the west. Some isolated/scattered showers are possible Sunday evening with increasing chances for showers and a slight chance for thunderstorms overnight into Monday as the front draws closer to the region. Mostly cloudy skies are expected Monday with showers and a slight chance for afternoon/evening thunderstorms as the front moves through. Partly sunny skies develop Wednesday with a chance for scatters showers and isolated thunderstorms Wednesday afternoon and evening as high pressure build east from the Great Lakes.

Saturday, August 1

Partly cloudy with a high in the low 80s. Slight chance for afternoon showers. Northwest winds 5 to 10 mph.

Saturday night, partly cloudy with a low in the middle 50s. West winds 0 to 5 mph.

Sunday, August 2

Partly cloudy a with a slight chance for isolated afternoon showers. High in the low 80s with west/southwest winds 5 to 10 mph.

Sunday night, partly cloudy early then becoming mostly cloudy after midnight with a 40 percent chance for showers and a slight chance for thunderstorms overnight. Low in the mid-50s with south winds 0 to 5 mph.

Monday, August 3

Partly cloudy with a 40 percent chance for showers and a slight chance for afternoon/evening thunderstorms. High in the middle 70s with southwest winds 5 to 10 mph.

Monday night, partly cloudy with a 30 percent chance for showers. Low in the mid-50s with west winds 0 to 5 mph.

Tuesday, August 4

Partly sunny with a 30 percent chance for showers and a slight chance for afternoon/evening thunderstorms. High in the mid-70s with northwest winds 5 to 10 mph. 

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

Regional Long-Range Trends: Wed. Aug. 5-Tue. Aug. 11

Above normal temperatures and below 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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