Apex Wx

Fort Kent & the Saint John Valley, Maine
Weather Information

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High pressure over the Valley will provide sunny, hot, and increasingly humid weather today before shifting east tonight as a cold front approaches from the west. Afternoon temperatures will climb into the upper 80s across much of the region. Morning low clouds and patches of fog will linger across some southern areas before giving way to mostly sunny skies. Wildfire smoke from western Quebec will remain high in the atmosphere, creating a milky or hazy appearance to the sky, especially across northern and western areas during the morning before becoming more noticeable farther south during the afternoon. Although the sky may appear hazy, the smoke is expected to remain well above the ground, so widespread air quality impacts are not anticipated.

Increasing moisture ahead of the approaching cold front will make tonight feel noticeably more humid. Scattered showers are expected to develop across the area late this evening before gradually becoming less widespread overnight. Overnight temperatures will remain mild, generally in the lower 60s.

The cold front will cross the region on Thursday, bringing partly sunny, warm, and humid conditions with afternoon highs in the lower to middle 80s. Additional showers are expected to redevelop, especially across central and northern areas, and a few thunderstorms may develop during the afternoon as the atmosphere becomes modestly unstable. There is also a slight chance that some of the wildfire smoke could mix closer to the surface across area during the afternoon. Showers may continue into Thursday night as the front slowly moves east, with overnight lows settling into the lower 60s. Rainfall amounts are not expected to be great—generally less than 1/10-inch for most locations.

A secondary cold front will move through on Friday, bringing a gradual decrease in humidity and afternoon temperatures in the upper 70s to around 80. The greatest chance for showers and thunderstorms will be in southern Maine. While an isolated strong storm cannot be ruled out on Thursday or Friday, the primary concern will be locally heavy rainfall that could lead to brief downpours and isolated poor drainage flooding. The Weather Predication Center has portions of the western Maine border region at risk for excessive rainfall.

High pressure will build into the region Friday night and remain in control through the weekend, bringing clearing skies, cooler nights with lows in the middle 50s, lower humidity, and generally pleasant weather. Overall, temperatures will remain above normal through the end of the week before seasonably comfortable air settles into the region for the weekend.

High pressure will build into the region for the weekend, bringing a stretch of pleasant summer weather. Saturday and Sunday will feature mostly sunny to sunny skies, comfortably low humidity, and afternoon temperatures ranging from the middle 70s to the lower 80s. Overnight temperatures will fall into the middle 50s Saturday night and the upper 50s Sunday night, providing cool and comfortable sleeping conditions. Light northwest winds on Saturday will gradually become lighter as high pressure settles overhead.

Changes will begin late Sunday night as a warm front approaches from the west, bringing increasing clouds and slightly more humid air. The front will move through the region on Monday, bringing partly sunny skies along with a chance of scattered afternoon showers and isolated thunderstorms. Afternoon temperatures will reach the upper 70s to lower 80s, with overnight lows Monday night remaining milder in the upper 50s to lower 60s.

The unsettled pattern will continue into Tuesday as the weakening front stalls near the Maine and New Brunswick border. This will bring another chance for showers, especially during the afternoon, along with isolated thunderstorms. Afternoon temperatures will remain in the upper 70s to lower 80s. Another cold front will approach Tuesday night, keeping the chance for showers and a few evening thunderstorms across the Saint John Valley.
A cold front moves through Wednesday with high pressure over the Great Lakes building into the Valley. Forecast uncertainty is higher late week thanks to the presence of an upper-level trough over the Northeast. Weak disturbances associated with the trough bring a chance of showers/thunderstorms to the region Thursday/Friday, with other waves of low pressure affecting the SJV over the weekend producing scattered shower and thunderstorm activity. The trough is expected to weaken heading into the following week, but models differ on timing. Currently, highs in the low-to-mid-70s with lows in the mid-50s expected with precipitation chances ranging from 20-40%. Climate trends suggest below-normal temperatures and above normal precipitation for the period.