St. John Valley Weather for Aug. 28-Sept. 3, 2024

Joseph E. Becker, Special to The County
3 weeks ago

3-Day Outlook: Wed. Aug. 28 – Fri. Aug. 30

A cold front will exit the region as the morning progresses as high pressure builds into the Valley from the James Bay region in Canada. Skies become mostly clear by this afternoon/evening with rain ending by midday. Highs reach the mid-60s with mostly clear skies and lows in the mid-40s tonight. 

Sunny skies spread across the SJV Thursday as high pressure crests over the region Thursday evening. Highs climb to the upper 60s with clear skies Thursday night and temperatures in the lower 40s. 

High pressure moves into the Maritimes Friday with sunny skies continuing across the Valley. Southerly flow brings warmer air into the region with highs in the middle 70s. Friday night, mostly clear skies with lows in the lower 50s are anticipated.

Daily Summary 

Wednesday: Mostly cloudy with numerous showers this morning, then mostly sunny this afternoon. Cooler with highs in the mid 60s. North winds 5 to 10 mph with gusts up to 25 mph. Chance of rain 70 percent.

Wednesday Night: Mostly clear. Lows in the mid-40s. Northwest winds 5 to 10 mph.

Thursday: Sunny. Highs in the upper 60s. North winds around 5 mph with gusts up to 15 mph.

Thursday Night: Clear. Patchy river fog late. Lows in the lower 40s. North winds around 5 mph in the evening, becoming light and variable.

Friday: Sunny. Patchy river fog early in the morning. Highs in the lower 70s. South winds 5 to 10 mph.

Friday Night: Mostly clear. Lows in the lower 50s.


4-7 Day Outlook: Sat. Aug. 31 – Tue. Sep. 3

An occluding cold front brings increasing cloudiness Saturday with showers likely in the afternoon/evening. The front moves east early Sunday while another approaches from the west with a continuing chance of showers Sunday afternoon through Monday afternoon under partly sunny/mostly cloudy skies. A new ridge of high pressure builds in Monday-Tuesday with decreasing cloudiness. Temperatures in the low 70s Saturday, mid-70s Sunday, mid-60s Monday, and Tuesday. Overnight lows in the lower 60s Saturday night, mid-50s Sunday night, and mid-40s Monday and Tuesday nights.

Daily Summary

Saturday: Mostly cloudy. A chance of showers in the morning, then showers likely in the afternoon. Highs in the upper 60s. Chance of rain 70 percent.

Saturday Night: Mostly cloudy. Showers likely, mainly in the evening. Lows in the upper 50s. Chance of rain 70 percent.

Sunday: Partly sunny. A chance of showers in the afternoon. Highs in the mid-70s. Chance of rain 30 percent.

Sunday Night: Mostly cloudy with a 50 percent chance of showers. Lows in the mid-50s.

Labor Day: Mostly cloudy with a 50 percent chance of showers. Highs in the lower 60s.

Monday Night: Partly cloudy with a chance of showers in the evening, then mostly clear after midnight. Lows in the lower 40s. Chance of rain 40 percent.

Tuesday: Mostly sunny in the morning, then becoming partly sunny. Highs in the lower 60s.

Tuesday Night: Mostly clear, with a low in the mid-40s.

8-14 Day Regional Climate Tends: Wed. Sep. 4 – Tue. Sep. 10 

Above normal temperatures / Below normal precipitation 

Note: Computer model precision diminishes the further into the week the forecast projects. Check The County.me or the National Weather Service Caribou, ME at for weather updates with more current information for the Saint John Valley.

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.