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7-Day Outlook: Sun. Aug. 2 – Sat. Aug. 8, 2026

A slow-moving cold front over Quebec will gradually approach the region today as low pressure develops along the boundary. Skies will remain mostly cloudy, and anyone traveling downstate may encounter some areas of dense fog during the morning hours, which is expected to diminish as the day progresses.

Scattered showers are expected to develop this afternoon across the Saint John Valley, with isolated thunderstorms also possible, which may produce locally heavier downpours. High temperatures will reach the lower to middle 80s. Light south winds will increase to around 5 to 10 mph, with gusts up to 20 mph. Rainfall totals less than 1/10-inch expected for most locations, though higher totals may occur in any storms.

Showers will become more widespread tonight as the cold front approaches the Saint Lawrence River Valley. A few thunderstorms remain possible in the evening. Overnight lows will fall into the lower 60s, with light southeast winds around 5 mph. Rainfall amounts will generally range from around 1/10 to 1/4-inch, although locally higher totals are possible in heavier showers and thunderstorms. Areas of fog are expected to redevelop overnight, with the greatest likelihood of dense fog across Downeast locations.

On Monday, strengthening low pressure will track north of Maine, pulling the cold front across the state. Rain is expected across the entire Valley, with a slight chance of thunderstorms, though instability aloft will be limited. High temperatures will remain much cooler--in the lower to middle 70s. South winds around 10 mph will gust into the 20 to 25 mph range at times. Rainfall totals of around o1/2 to 3/4-inch are possible, although locally higher amounts could occur where heavier bands of rain develop.

Rain will gradually taper to scattered showers Monday night as the cold front moves east of the area. Skies will slowly begin to clear overnight, although patchy fog may redevelop late. Low temperatures will fall into the middle to upper 50s with light southwest winds around 5-6 mph in Fort Kent and vicinity.

By Tuesday, much drier air will move into the region as high pressure over the Great Lakes builds east. Any lingering morning showers will quickly end, giving way to mostly sunny skies. High temperatures will recover into the upper 70s, with west winds of 10 to 15 mph and gusts to around 20 to 25 mph. Tuesday night will be mostly clear and seasonably cool, with lows in the middle to upper 50s. Patchy late-night fog will once again be possible in some locations.

Climate trends indicate near normal temperatures and slightly above normal precipitation for the period. High pressure is expected to provide dry weather and partly cloudy to mostly sunny skies. Daytime highs reach the upper 70s to lower 80s and overnight lows generally fall into the middle to upper 50s. Low pressure may affect the region Sunday night into Monday with a chance of showers/thunderstorms. High pressure holds sway Tuesday through Thursday with a front possibly crossing the region Friday and producing some shower/thunderstorm activity for Valley communities.

Updated every 3-6 hours from NWS Caribou

Weather Notice: This information is based on available computer models and data and may not reflect current conditions or later forecast updates. Always visit NWS Caribou at https://www.weather.gov/car/ for the latest official watches, warnings, and advisories for northern Maine.

Credits

• Sun/Moon data from US Naval Observatory with additional information from timeanddate.com.
• NOAA Warning Banner provided by WillyWeather.com.
• Until Dec. 2026, additional Archived Weather Data from Apex Wx is at the University of Utah's MesoWest
• Apex Wx logo by Joanna Becker ©2016 (Visit Bushi and Brush Arts Dojo)

How accurate are forecasts? On average, for the first 72 hours the accuracy is 90 percent. For days 4-7 it is 70 percent. After seven days, it is 50 percent—just good for indicating trends. On social media and other similar sites, posts that show a forecast model run a week out are just for clicks and likes, and are not considered reliable. Extended forecasts are subject to change as weather patterns evolve so should be considered guidance rather than precise predictions. Check for updated forecasts and advisories as conditions develop.