An RV in Montana is winterized for about 5 months a year at Billings, and the median first 32°F night arrives September 26 at Missoula (NOAA 1991-2020). 27 RV & motorhome storage facilities are listed in Montana, 7 with indoor or climate-controlled space.
| Month | Billings high / low | RV | Billings snow | Missoula high / low | RV |
|---|---|---|---|---|---|
| Jan | 36° / 18° | winterized | 10.6 in | 32° / 18° | winterized |
| Feb | 39° / 20° | winterized | 9.1 in | 37° / 21° | winterized |
| Mar | 49° / 27° | winterized | 8.2 in | 48° / 27° | winterized |
| Apr | 57° / 35° | shoulder trips | 7.5 in | 56° / 32° | shoulder trips |
| May | 67° / 44° | camping | 0.9 in | 66° / 40° | shoulder trips |
| Jun | 77° / 52° | camping | 0.0 in | 73° / 46° | camping |
| Jul | 87° / 59° | camping | 0.0 in | 85° / 52° | camping |
| Aug | 86° / 58° | camping | 0.0 in | 84° / 50° | camping |
| Sep | 74° / 49° | camping | 0.3 in | 73° / 42° | camping |
| Oct | 59° / 37° | shoulder trips | 4.5 in | 56° / 32° | shoulder trips |
| Nov | 46° / 27° | winterized | 6.5 in | 40° / 25° | winterized |
| Dec | 36° / 19° | winterized | 9.8 in | 31° / 18° | 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 Billings has 5 months camping (May to September), 2 of shoulder trips and 5 winterized. By that rule an RV at Missoula has 4 months camping (June to September), 3 of shoulder trips and 5 winterized.
Montana is hard-freeze country: Billings logs about 141.5 nights at or below 32°F and 39.5 days that never thaw, enough to freeze any water left in the water lines, pump, water heater and toilet valve.
27 live listings in 17 cities; by listed type: 7 indoor, 7 covered and 27 outdoor (types overlap). No Montana RV & motorhome storage listing publishes a rate on StowHelp.
| Facility | City | Listed storage | Listed amenities | Also listed for |
|---|---|---|---|---|
| Billings Storage Solutions | Billings | indoor, outdoor, covered | security cameras, gated entry | Trailer |
| Chief Mountain Storage | Browning | indoor, outdoor, covered | Trailer | |
| Central Storage - Whitefish | Whitefish | indoor, outdoor, covered | Trailer | |
| 4E Storage Solutions | Billings | indoor, outdoor, covered | security cameras, gated entry | Trailer |
| Eagle Nest RV Resort | Polson | outdoor | ||
| Polson / Flathead Lake KOA Holiday | Polson | outdoor | ||
| Montana Basecamp | Kalispell | outdoor | ||
| Fox Den RV & Campground | West Yellowstone | outdoor | ||
| Big Timber / Greycliff Mill KOA Journey | Big Timber | outdoor | ||
| Lost Moose Meadows | Lincoln | outdoor | ||
| Campground St. Regis | St. Regis | outdoor | ||
| Granite Peak RV Resort | Missoula | outdoor | ||
| Boat & RV Storage at the Wye | Wye | outdoor | Boat | |
| Missoula KOA Holiday | Missoula | outdoor | ||
| Yellowstone Grizzly RV Park | West Yellowstone | outdoor | ||
| Butte KOA Journey Campgroung | Butte | outdoor | ||
| Blue Mountains RV Park | Eureka | outdoor | ||
| Johnson's Campground and RV Park | St Mary | outdoor | ||
| Riverfront RV Park | Garrison | outdoor | ||
| Indian Springs RV Resort | Eureka | outdoor |
| City | RV & Motorhome Storage listings | Indoor | Climate-controlled | Outdoor |
|---|---|---|---|---|
| Billings | 5 | 5 | 0 | 5 |
| Missoula | 3 | 0 | 0 | 3 |
| Polson | 3 | 0 | 0 | 3 |
| Eureka | 2 | 0 | 0 | 2 |
| West Yellowstone | 2 | 0 | 0 | 2 |
| Anaconda | 1 | 0 | 0 | 1 |
| Big Timber | 1 | 0 | 0 | 1 |
| Browning | 1 | 1 | 0 | 1 |
| Butte | 1 | 0 | 0 | 1 |
| Ennis | 1 | 0 | 0 | 1 |
NOAA's 1991-2020 median first 32°F night is October 7 at Billings and September 26 at Missoula; winterize by September 12, two weeks ahead of the earlier date. By our RV rule Billings stays camping through September and Missoula through September, then 2 months of shoulder trips follow at Billings. 7 Montana listings offer indoor or climate-controlled space.
5 at Billings (October to April) and 5 at Missoula (October to May), plus 2 and 3 months of shoulder trips. Those winterized months hold 44.2 of the 57.4 inches of snow Billings averages a year (77%), which is the load on a cover or carport roof. At Billings an RV is camping from May to September (5 months), against 4 at Missoula.
Of 27 live Montana listings, 7 list indoor space and 0 climate-controlled units, against 27 outdoor and 7 covered. By city: Billings (5 listed, 5 indoor), Missoula (3 listed, 0 indoor), Polson (3 listed, 0 indoor) and Eureka (2 listed, 0 indoor). Most indoor listings: Billings (5), Browning (1) and Whitefish (1). Ask whether indoor means heated; listings span 17 cities in all.
At Billings, 5 months average a low at or below 32°F, all of them winterized months by our RV rule. Billings logs 141.5 nights at or below 32°F and 12.8 at or below 0°F a year; January, the coldest month, averages 17.9°F and is winterized for an RV.
After the last frost. The median last 32°F night is May 4 at Billings and May 16 at Missoula; the last 28°F hard freeze comes around April 21 and May 2. Our rule makes May the first month camping at Billings and June at Missoula. That month Billings averages a 43.8°F low and a 66.9°F high. Reverse each winterization step first.
Montana RV & motorhome storage listings span 17 cities, led by Billings (5 listed), Missoula (3 listed), Polson (3 listed), Eureka (2 listed) and West Yellowstone (2 listed). For outdoor winter parking, Billings (5 outdoor) and Missoula (3 outdoor) lead. Statewide, 27 list outdoor, 7 covered and 7 indoor or climate-controlled spaces. Compare the cities nearest you before September 26.
NOAA NCEI Climate Normals 1991-2020 (USW00024033, USW00024153); NOAA AOML hurricane impacts 1851-2025; StowHelp listings 2026-10-07 (methodology).