An RV in Maine is winterized for about 5 months a year at Caribou, and the median first 32°F night arrives October 1 at Caribou (NOAA 1991-2020). 105 RV & motorhome storage facilities are listed in Maine, 4 with indoor or climate-controlled space.
| Month | Portland high / low | RV | Caribou snow | Caribou high / low | RV |
|---|---|---|---|---|---|
| Jan | 32° / 16° | winterized | 25.0 in | 21° / 3° | winterized |
| Feb | 35° / 17° | winterized | 25.3 in | 24° / 4° | winterized |
| Mar | 42° / 26° | winterized | 21.4 in | 34° / 16° | winterized |
| Apr | 54° / 35° | shoulder trips | 8.3 in | 48° / 29° | shoulder trips |
| May | 64° / 46° | camping | 0.8 in | 63° / 41° | camping |
| Jun | 74° / 55° | camping | 0.0 in | 72° / 51° | camping |
| Jul | 80° / 61° | camping | 0.0 in | 77° / 56° | camping |
| Aug | 79° / 60° | camping | 0.0 in | 76° / 54° | camping |
| Sep | 71° / 52° | camping | 0.1 in | 67° / 46° | camping |
| Oct | 60° / 41° | camping | 1.7 in | 53° / 36° | shoulder trips |
| Nov | 48° / 32° | shoulder trips | 10.4 in | 40° / 26° | winterized |
| Dec | 38° / 22° | winterized | 25.2 in | 28° / 12° | winterized |
RV column rule: camping at a 40°F low or warmer with highs under 95°F; shoulder trips above a 28°F low; winterized below.
By that rule an RV at Portland has 6 months camping (May to October), 2 of shoulder trips and 4 winterized. By that rule an RV at Caribou has 5 months camping (May to September), 2 of shoulder trips and 5 winterized.
Maine is severe-freeze country for an RV: Caribou averages 2.6°F on January nights and about 38.1 nights a year at or below 0°F, so full winterization is mandatory and heated space is worth pricing.
105 live listings in 49 cities; by listed type: 4 indoor, 4 covered and 71 outdoor (types overlap). No Maine RV & motorhome storage listing publishes a rate on StowHelp.
| Facility | City | Listed storage | Listed amenities | Also listed for |
|---|---|---|---|---|
| Extra Space Storage - South Portland | South Portland | indoor, outdoor, covered | Trailer | |
| Extra Space Storage - Saco | Saco | indoor, outdoor, covered | Trailer | |
| Prime Storage - Gorham | Gorham | indoor, outdoor, covered | Trailer | |
| Portland Outdoor Storage | Portland | indoor, outdoor, covered | Trailer | |
| Silver Springs Campground and Cottages | Saco | outdoor | ||
| Central Maine Self Storage | Manchester | outdoor | Car, Boat, Motorcycle | |
| Coastal Pines Camp Sites | Wells | outdoor | ||
| Manchester Self Storage | Manchester | outdoor | Car, Boat, Motorcycle | |
| Berwick Self Storage | Berwick | outdoor | Car, Boat, Motorcycle | |
| Bayley's Camping Resort | Scarborough | outdoor | ||
| A.C. Midcoast Storage | Boothbay | outdoor | Car, Boat, Motorcycle | |
| West Gardiner Self Storage | West Gardiner | outdoor | Car, Boat, Motorcycle | |
| Wild Acres | Old Orchard Beach | outdoor | ||
| The Birches | Litchfield | outdoor | ||
| Powder Horn Family Camping Resort | Old Orchard Beach | outdoor | ||
| Apple Valley Campground | Acton | outdoor | ||
| Bentleys Campground | Arundel | outdoor | ||
| Abbot Storage | Abbot | outdoor | Car, Boat, Motorcycle | |
| Fogg Brook Resort Campground | Palmyra | outdoor | ||
| U-Haul | Old Town | outdoor | Car, Boat, Motorcycle |
| City | RV & Motorhome Storage listings | Indoor | Climate-controlled | Outdoor |
|---|---|---|---|---|
| Bar Harbor | 19 | 0 | 0 | 0 |
| Kennebunkport | 15 | 0 | 0 | 0 |
| Sanford | 6 | 0 | 0 | 6 |
| Arundel | 5 | 0 | 0 | 5 |
| Old Orchard Beach | 4 | 0 | 0 | 4 |
| Saco | 4 | 1 | 0 | 4 |
| Boothbay | 3 | 0 | 0 | 3 |
| Scarborough | 3 | 0 | 0 | 3 |
| Manchester | 2 | 0 | 0 | 2 |
| Palmyra | 2 | 0 | 0 | 2 |
NOAA's 1991-2020 median first 32°F night is October 15 at Portland and October 1 at Caribou; winterize by September 17, two weeks ahead of the earlier date. By our RV rule Portland stays camping through October and Caribou through September, then 2 months of shoulder trips follow at Portland. 4 Maine listings offer indoor or climate-controlled space.
4 at Portland (November to April) and 5 at Caribou (October to April), plus 2 and 2 months of shoulder trips. Those winterized months hold 107.3 of the 118.2 inches of snow Caribou averages a year (91%), which is the load on a cover or carport roof. At Portland an RV is camping from May to October (6 months), against 5 at Caribou.
Of 105 live Maine listings, 4 list indoor space and 0 climate-controlled units, against 71 outdoor and 4 covered. By city: Bar Harbor (19 listed, 0 indoor), Kennebunkport (15 listed, 0 indoor), Sanford (6 listed, 0 indoor) and Arundel (5 listed, 0 indoor). Most indoor listings: Saco (1), South Portland (1) and Gorham (1). Ask whether indoor means heated; listings span 49 cities in all.
At Caribou, 6 months average a low at or below 32°F: 5 winterized and 1 shoulder trips or camping by our RV rule. Caribou logs 179.9 nights at or below 32°F and 38.1 at or below 0°F a year; January, the coldest month, averages 2.6°F and is winterized for an RV. Drain or re-protect the RV after any outing in those 1 month.
After the last frost. The median last 32°F night is April 26 at Portland and May 7 at Caribou; the last 28°F hard freeze comes around April 14 and April 26. Our rule makes May the first month camping at Portland and May at Caribou. That month Portland averages a 45.5°F low and a 64.2°F high. Reverse each winterization step first.
Maine RV & motorhome storage listings span 49 cities, led by Bar Harbor (19 listed), Kennebunkport (15 listed), Sanford (6 listed), Arundel (5 listed) and Old Orchard Beach (4 listed). For outdoor winter parking, Sanford (6 outdoor) and Arundel (5 outdoor) lead. Statewide, 71 list outdoor, 4 covered and 4 indoor or climate-controlled spaces. Compare the cities nearest you before October 1.
NOAA NCEI Climate Normals 1991-2020 (USW00014764, USW00014607); NOAA AOML hurricane impacts 1851-2025; StowHelp listings 2026-10-07 (methodology).