Weather
Northern Maine Weather: Lows Drop to 25°F Oct. 20-21
CARIBOU, ME – Residents across Caribou and surrounding Aroostook County are facing another stretch of freezing overnight temperatures next week, with lows falling into the 20s even as daytime sunshine
By Natalie Rhodes · 2026-10-18T00:41:18.672Z
CARIBOU, ME – Residents across Caribou and surrounding Aroostook County are facing another stretch of freezing overnight temperatures next week, with lows falling into the 20s even as daytime sunshine brings temperatures into the 50s. The chilly pattern is expected to continue through at least Saturday, Oct. 24, raising concerns about frost, icy surfaces where moisture is present and the need to protect temperature sensitive outdoor equipment and vegetation.
According to the National Weather Service in Caribou, temperatures are expected to reach approximately 54 degrees Tuesday, Oct. 20, before falling to 26 degrees overnight. Wednesday will bring sunshine and a high near 50 degrees, followed by another cold night with temperatures dropping to approximately 25 degrees. Additional freezing temperatures are forecast Thursday and Friday nights, making overnight cold the most persistent weather concern during the upcoming week.
The colder conditions follow a weekend that has already brought subfreezing temperatures to northern Maine. Saturday evening readings at Caribou Municipal Airport were near 29 degrees, with temperatures expected to fall to approximately 25 degrees overnight. Sunday will provide some relief as sunshine pushes temperatures toward 49 degrees, followed by a warmer Monday afternoon near 59 degrees before colder nighttime conditions return.
Another concern arrives early Tuesday, when patchy fog could develop before 8 a.m. The forecast also calls for patchy fog after 2 a.m. Monday night. Reduced visibility may affect drivers traveling through Caribou and nearby portions of Aroostook County, particularly along rural roads and low lying areas. Motorists should allow additional stopping distance if fog develops and remain alert for changing visibility during the morning commute.
Five Day Northern Maine Weather Outlook: Oct. 20 24 Tuesday, Oct. 20: Patchy morning fog is possible before 8 a.m., followed by mostly sunny skies and a high near 54 degrees, with northerly winds of 5 to 11 mph and gusts reaching 22 mph before temperatures fall to approximately 26 degrees overnight.
Wednesday, Oct. 21: Sunny skies are expected across Caribou, with afternoon temperatures reaching approximately 50 degrees before mostly clear conditions allow overnight lows to fall to around 25 degrees.
Thursday, Oct. 22: Mostly sunny weather continues with a high near 53 degrees, followed by partly cloudy skies and another freezing night as temperatures drop to approximately 32 degrees.
Friday, Oct. 23: Mostly sunny conditions are forecast with afternoon temperatures reaching approximately 48 degrees, while partly cloudy skies overnight accompany a low near 27 degrees.
Saturday, Oct. 24: Mostly sunny skies are expected, with afternoon temperatures reaching approximately 50 degrees, continuing the pattern of cool autumn afternoons across the Caribou area.
Extended Outlook: Oct. 25 26 The supplied National Weather Service forecast ends Saturday, Oct. 24, and does not establish specific conditions for Sunday, Oct. 25, or Monday, Oct. 26. Updated guidance will be needed to determine whether freezing nighttime temperatures persist into the following week.
For homeowners and agricultural operations, the repeated overnight freezes could affect any remaining sensitive plants, exposed water lines and outdoor equipment. Residents should consider protecting vulnerable items before temperatures fall below freezing. The forecast does not establish that a freeze warning or other weather alert has been issued.
Drivers should also remain cautious during early morning hours, especially where fog or lingering moisture could combine with subfreezing temperatures. Although the forecast does not indicate widespread precipitation, isolated slick spots may develop wherever water freezes on untreated surfaces.