Apex Weather

St. John Valley weather for Sept. 18-24, 2019

ST. JOHN VALLEY, Maine — A ridge of high pressure will bring clear skies to the Saint John Valley Wednesday and Wednesday night and mostly clear skies Thursday.

Skies will become partly cloudy Thursday night as a cold front slides down from the northwest producing partly sunny skies Friday, but little in the way of moisture. Temperatures will moderate as high pressure moves south of the region allowing warmer southern air to channel into the region. High pressure will continue to dominate the SJV’s weather through the weekend with mostly clear skies across the region Saturday and Sunday. A cold front from the west brings a chance for showers Monday and Tuesday as it moves through.

Daily Weather Summary

Wednesday, September 18
Sunny with a high in the low 60s. Northwest winds 0 to 5 mph. Overnight, clear with a low in the lower 30s with freeze warning in effect from midnight through early Thursday. West/southwest winds will be calm overnight. Some areas of fog are possible.

Thursday, September 19
Mostly clear with a high in the upper 60s with southwest winds 0 to 5 mph with some gusts to 10 mph. Thursday night, partly cloudy with a low in the middle 40s. Southwest winds 0 to 5 mph.

Friday, September 20
Partly cloudy to partly sunny with a slight chance for precipitation. High in the middle 70s with west winds 5 to 10 mph with gusts around 15 mph or so possible. Friday night, partly clear to partly cloudy with a low in the lower 50s. Northwest winds 0 to 5 mph.

Saturday, September 21
Partly cloudy in the morning then mostly clear in the afternoon/evening. High in the middle 60s with northwest winds 0 to 5 mph. Saturday night, mostly clear with a low in the upper 40s. Southwest winds 0 to 5 mph.

Sunday, September 22
Mostly clear with a high in the middle 70s. Southwest winds 8 to 14 mph. Sunday night, partly cloudy with a 40 percent chance for showers. Low in the upper 50s with southwest winds 8 to 14 mph. 

Monday, September 23
Mostly cloudy with a 50 percent chance for showers. High in the upper 60s with southwest winds 8 to 14 mph. Monday night, partly cloudy with a 40 percent chance for showers. Low in the lower 50s with west winds 0 to 5 mph.

Tuesday, September 24
Partly sunny with a 30 percent chance for showers. High in the low 60s with west winds 0 to 5 mph. Tuesday night, partly cloudy with a 30 percent chance for showers. Low in the middle 40s with north/northwest 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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