Fort Kent & the Saint John Valley, Maine
Weather Information

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The middle and latter portions of the week will feature a transition from the lingering influence of the early-week Quebec upper low to a brief period of high pressure ridging and drier weather Wednesday into Thursday. Another cold front will then approach from central Canada late Thursday into Friday. Southerly flow ahead of this system will draw warmer and increasingly humid air northward before the front brings another period of showers Friday into early Saturday. Cooler and drier air should begin filtering into the Saint John Valley behind the front later Saturday.

For Fort Kent and the Saint John Valley, Wednesday will bring a noticeable improvement as the upper low gradually loses its influence and high pressure begins building into the region. Mostly sunny skies are expected, although lingering instability may produce an isolated afternoon shower or thunderstorm. Most locations should remain dry. Afternoon temperatures will reach the lower to mid-70s, with west winds around 5 to 10 mph.

High pressure will provide mostly clear and quiet conditions Wednesday night. With relatively dry air, light winds, and limited cloud cover, temperatures will fall into the lower to mid-50s.

Thursday should provide the warmest and driest weather of the period as high pressure shifts east of the region. Mostly sunny skies will allow afternoon temperatures to climb into the upper 70s to around 80. Humidity will gradually begin increasing later in the day as winds turn more southerly ahead of the next approaching cold front.

Clouds will begin increasing Thursday night as the front approaches from central Canada and deeper moisture spreads northward. Most of the night should remain dry, although an isolated shower may develop toward daybreak Friday. Temperatures will fall into the middle to upper 50s.

On Friday, the approaching cold front will interact with increasingly warm and humid air across northern Maine, bringing a greater likelihood of showers to the Saint John Valley. Some breaks in the clouds will remain possible, with afternoon temperatures reaching the mid to upper 70s. The timing of the front will determine whether enough instability develops for thunderstorms, but periods of showers currently appear more likely than persistent rainfall.

Showers will remain likely Friday night as the cold front moves through the region. Skies will be mostly cloudy, with temperatures falling into the mid-50s. Cooler and less humid air should begin arriving behind the front later in the night, although the timing of the frontal passage remains somewhat uncertain.

On Saturday, the front should move east of the Saint John Valley, but lingering upper-level energy and daytime heating may produce additional scattered showers and thunderstorms. Otherwise, partly sunny skies are expected, with cooler afternoon temperatures in the lower to mid-70s.

Any remaining showers or thunderstorms should diminish early Saturday evening as the system continues eastward and drier air becomes established across northern Maine. Skies should become partly cloudy overnight, with temperatures falling into the upper 40s to lower 50s.
Climate Prediction Center outlooks indicate near normal temperatures and favor slightly above normal precipitation for northern Maine. A persistent trough over the Great Lakes and Northeast should favor a changeable pattern, with occasional frontal passages and brief periods of cooler Canadian air. Normal temperatures at Fort Kent and vicinity during this period are in the lower 70s for highs and upper 40s for lows.