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Overview

A significant temperature transition is expected across northern Maine through Thursday, beginning with chilly Canadian air before a substantial warming trend develops ahead of an approaching cold front. Northwest flow will maintain cold, breezy conditions Tuesday, with abundant sunshine but afternoon temperatures reaching only around 40°F. As high pressure becomes more influential Tuesday evening, winds will diminish and mostly clear skies will favor strong radiational cooling. Temperatures will fall to around 20°F overnight, with locally colder readings possible in sheltered sections of the Saint John and Fish River valleys.

High pressure will maintain dry, sunny conditions Wednesday as the colder air mass gradually moderates. Southwest winds will develop, allowing afternoon temperatures to recover into the middle 40s. Increasing southwest flow and some cloud cover Wednesday night will limit overnight cooling, with temperatures remaining in the middle 30s.

By Thursday, a considerably milder air mass will spread across the Saint John Valley ahead of an approaching cold front. Mostly sunny skies and southwest winds gusting to around 20–25 mph will support afternoon temperatures in the lower 60s, more than 20°F warmer than Tuesday. Clouds will increase Thursday evening, followed by a chance (50%) of light rain after 8 PM. Rainfall amounts should remain below 0.10 inch, with overnight temperatures in the middle 40s.

Tuesday: Mostly sunny skies will prevail across Fort Kent and the Saint John Valley, although a cold Canadian air mass will keep afternoon temperatures around 40°F. Northwest winds of 9–13 mph, with gusts approaching 25 mph, will add to the chill, particularly across exposed terrain. Winds will diminish this evening as high pressure becomes more influential. Clear skies overnight will favor strong radiational cooling, with temperatures falling into the lower 20s and locally colder readings possible in sheltered valleys.

Wednesday: High pressure will maintain sunny, dry conditions across northern Aroostook County, with afternoon temperatures recovering into the middle to upper 40s. Light winds will become westerly during the afternoon as the colder air mass begins moderating. Mostly clear skies early Wednesday evening will give way to partly cloudy conditions overnight as southwest flow develops. Temperatures will remain noticeably milder than Tuesday night, falling into the lower to middle 30s.

Thursday: A considerably milder air mass will spread across the Saint John Valley as southwest flow strengthens ahead of an approaching cold front. Mostly sunny skies will support afternoon temperatures around 60°F, with southwest winds of 5–10 mph and occasional gusts approaching 20 mph. Clouds will increase Thursday evening, followed by a chance (40–50%) of light rain overnight. Temperatures will remain relatively mild, falling into the middle 40s, with rainfall amounts generally less than 0.10 inch expected.

Friday, October 30 – Monday, November 2

Overview Friday: A weak cold front will bring a slight chance (20%) of light rain to Fort Kent and surrounding locations, although partly sunny skies should prevail through much of the day. Afternoon temperatures will reach the middle 50s, with west winds of 7–13 mph and gusts approaching 25 mph. Any lingering light rain should end before 9 PM, followed by partly cloudy skies and colder conditions overnight. Temperatures will fall into the upper 20s as cooler Canadian air becomes established.

Saturday: A cooler, drier air mass will settle across the County, bringing mostly sunny skies and afternoon temperatures in the middle 40s. High pressure will provide generally settled conditions, with no precipitation expected. Mostly clear skies will continue Saturday evening and overnight, favoring radiational cooling as temperatures fall into the middle 20s. Sheltered valley locations may experience somewhat colder readings, particularly toward daybreak Sunday.

Sunday: Mostly sunny skies will accompany a modest warming trend across the Saint John Valley, with afternoon temperatures recovering into the lower 50s. Dry conditions should prevail through the day, providing favorable weather for outdoor activities. Clouds will increase Sunday evening and overnight as another disturbance approaches, with a chance (30%) of light rain developing after 1 AM. Temperatures will remain relatively mild overnight, falling into the middle 30s.

Monday: A somewhat more unsettled pattern will develop across northern Maine, with partly sunny skies and a chance (40%) of light rain during the day. Afternoon temperatures will reach the lower 50s, although precipitation coverage and timing remain uncertain. Mostly cloudy skies will continue Monday evening and overnight, with a chance of additional rain and temperatures falling into the lower 30s. Colder sheltered locations may approach freezing, but the current forecast continues to favor rain.

Long Range Trends: Tuesday, November 3 – Monday, November 9

The latest outlook favors above-normal temperatures and above-normal precipitation across northern Maine and the Saint John Valley. A broader pattern of relatively mild air across eastern North America may support warmer conditions while allowing additional precipitation opportunities. Typical early-November temperatures across the Valley feature daytime highs in the lower 40s and overnight lows in the middle to upper 20s. The precipitation outlook suggests a somewhat wetter period, although individual storm timing remains uncertain.

Outlooks updated 7-9 AM weekdays & 8-10 AM weekends and holidays. Long range outlooks indicate broader temperature and precipitation trends rather than precise day-to-day forecasts. Common abbreviations: NWS = National Weather Service; WPC = Weather Prediction Center; SPC = Storm Prediction Center; CPC = Climate Prediction Center, NHC = National Hurricane Center

Updated every 3-6 hours from NWS Caribou

Weather Notice

Apex Wx forecasts are based on available observations, computer model guidance, and other meteorological data. Conditions and forecast guidance can change, and information displayed here may not reflect the latest official forecast or warning information. Always visit NWS Caribou for the latest official forecasts, watches, warnings, and advisories for northern Maine.

Apex Wx is a private weather information service unaffiliated with NOAA or the National Weather Service and operated by Joseph Becker. Dr. Becker earned a Certificate in Weather Forecasting from Penn State University and is a trained NWS SKYWARN Storm Spotter.

Credits

• Sun and Moon data from the U.S. Naval Observatory, with additional astronomical information from timeanddate.com.
• NOAA warning banner provided by WillyWeather.com.
• Through December 2026, additional archived Apex Wx weather data are available through the University of Utah's MesoWest.
• Current and archived Apex Wx weather data are available through Synoptic Data, the successor to MesoWest.
• Apex Wx logo by Joanna Becker © 2016. Visit Bushi and Brush Arts Dojo.

How accurate are forecasts?

Forecast confidence generally decreases as lead time increases. Forecasts for the next few days usually provide considerably more detail and confidence than forecasts a week or more in advance. Beyond about 7 days, forecasts are most useful for identifying broader weather patterns and temperature or precipitation trends rather than predicting exact conditions at a particular place and time.

Individual computer-model runs—especially those depicting specific storms, snowfall amounts, or other details a week or more in advance—should not be treated as forecasts by themselves. Extended forecasts will change as new observations become available and models better resolve the evolving atmospheric pattern. Check updated forecasts as the event approaches.

Weather Apps

Most weather apps rely heavily on automated forecast data. They can be useful for a quick look at routine weather, but automated forecasts may miss important local details or the significance of rapidly changing conditions. During hazardous or changing weather, consult weather.gov and other official National Weather Service information rather than relying solely on an app.

Radar Apps

Weather radar is an invaluable tool for tracking precipitation and storms, but radar images should not be interpreted as a real-time picture of conditions at the ground. Data collection, processing, transmission, mosaicking, and app updates can introduce delays, and radar detects energy returned from precipitation at varying heights above the surface. During rapidly developing or moving storms, conditions at your location may therefore differ from what a radar app appears to show. Use radar together with current observations and official National Weather Service warnings.