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7-Day Outlook: Sat. July 11 – Fri. July 17, 2026

A broad area of high pressure extending from the Midwest into the Northeast will provide pleasant weather through Sunday night. Mostly clear skies are expected today and tonight, followed by abundant sunshine on Sunday. Afternoon high temperatures will reach the middle 70s today before warming into the lower 80s on Sunday. Overnight low temperatures will fall into the lower 50s tonight and the upper 50s Sunday night. Humidity will remain comfortable through the weekend, with light winds prevailing.

Clouds will increase on Monday as a warm front moves across the region. High temperatures will reach the lower 80s, while overnight lows Monday night will remain much milder in the middle 60s. There will be a chance of showers and thunderstorms during the day, with the greatest likelihood occurring during the afternoon. Some thunderstorms could produce locally heavy rainfall, although widespread heavy rain is not expected. Southwest winds will increase, with occasional gusts reaching about 21 mph.

An upper-level ridge of high pressure over the Great Plains will gradually shift eastward early next week, allowing very warm air from the western United States to spread into the region from Monday through Wednesday. Afternoon high temperatures are expected to climb into the upper 80s to lower 90s on Tuesday and Wednesday, while overnight lows remain in the middle to upper 60s. Increasing humidity will make it feel even warmer with heat index values potentially reaching the middle to upper 90s. A cold front is expected to move through the region during the middle of the week, bringing a return to cooler and less humid conditions for the latter part of the week.

An upper-level ridge shifting eastward will allow very warm and increasingly humid air to spread into the SJV. A cold front will approach the region on Tuesday and sweep across the Valley Tuesday night, bringing the potential for showers and thunderstorms. Afternoon high temperatures are expected to reach the middle to upper 80s, while overnight lows Tuesday night will remain mild in the middle 60s. Southwest winds will increase during the day, with occasional gusts exceeding 20 miles per hour.

The combination of heat, humidity, and strengthening winds throughout the atmosphere will create conditions favorable for thunderstorms capable of becoming severe, especially across northern and central portions of the state. The primary threats with any severe thunderstorms will be damaging wind gusts, frequent lightning, torrential rainfall, and hail. Although the risk is lower, an isolated tornado cannot be completely ruled out. Some uncertainty remains regarding how long the atmosphere will remain unstable as the cold front moves through. If sufficient instability persists into the evening, strong to severe thunderstorms could continue into Tuesday night.

The cold front will move east of the region on Wednesday, but a few scattered showers and isolated afternoon thunderstorms may develop before precipitation gradually comes to an end Wednesday night. High temperatures on Wednesday will be noticeably cooler, reaching the upper 70s, with overnight lows falling into the middle 50s as less humid air begins to arrive.

A secondary cold front will cross the area on Thursday, bringing only a slight chance of a passing shower. Otherwise, skies will become mostly sunny with afternoon high temperatures in the lower 70s and overnight lows in the lower to middle 50s. High pressure building southward from the Hudson Bay region will promote cooler and less humid conditions late in the week. While a few additional showers remain possible on Friday, much of the day is expected to be partly to mostly sunny with highs in the lower 70s and overnight lows settling into the lower 50s.

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.