A personal watercraft in Montana is off the water for about 7 months a year at Billings, and the median first 32°F night arrives September 26 at Missoula (NOAA 1991-2020). 19 jet ski & PWC storage facilities are listed in Montana, 19 with indoor or climate-controlled space.
| Month | Billings high / low | personal watercraft | Billings snow | Missoula high / low | personal watercraft |
|---|---|---|---|---|---|
| Jan | 36° / 18° | off the water | 10.6 in | 32° / 18° | off the water |
| Feb | 39° / 20° | off the water | 9.1 in | 37° / 21° | off the water |
| Mar | 49° / 27° | off the water | 8.2 in | 48° / 27° | off the water |
| Apr | 57° / 35° | off the water | 7.5 in | 56° / 32° | off the water |
| May | 67° / 44° | wetsuit weather | 0.9 in | 66° / 40° | wetsuit weather |
| Jun | 77° / 52° | on the water | 0.0 in | 73° / 46° | wetsuit weather |
| Jul | 87° / 59° | on the water | 0.0 in | 85° / 52° | on the water |
| Aug | 86° / 58° | on the water | 0.0 in | 84° / 50° | on the water |
| Sep | 74° / 49° | wetsuit weather | 0.3 in | 73° / 42° | wetsuit weather |
| Oct | 59° / 37° | off the water | 4.5 in | 56° / 32° | off the water |
| Nov | 46° / 27° | off the water | 6.5 in | 40° / 25° | off the water |
| Dec | 36° / 19° | off the water | 9.8 in | 31° / 18° | off the water |
Jet Ski column rule: on the water from a 76°F high; wetsuit weather from 66°F; off the water below.
By that rule a personal watercraft at Billings has 3 months on the water (June to August), 2 of wetsuit weather and 7 off the water. By that rule a personal watercraft at Missoula has 2 months on the water (July to August), 3 of wetsuit weather and 7 off the water.
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 exhaust, cooling passages and pump housing.
19 live listings in 8 cities; by listed type: 19 indoor, 19 covered and 19 outdoor (types overlap). No Montana jet ski & PWC storage listing publishes a rate on StowHelp.
| Facility | City | Listed storage | Listed amenities | Also listed for |
|---|---|---|---|---|
| Five Star Storage - Grand Ave Billings | Billings | indoor, outdoor, covered | Boat | |
| Red Shark Storage - Kalispell/Whitefish | Kalispell | indoor, outdoor, covered | Boat | |
| Bigfoot Storage | Great Falls | indoor, outdoor, covered | security cameras, gated entry | Boat |
| King Storage | Billings | indoor, outdoor, covered | Boat | |
| Copperstone Stor-All | Missoula | indoor, outdoor, covered | Boat | |
| Windmill Storage & Business Park | Columbia Falls | indoor, outdoor, covered | Boat | |
| Missoula Boat & RV Storage | Missoula | indoor, outdoor, covered | Boat | |
| Highway 89 Storage | Great Falls | indoor, outdoor, covered | Boat | |
| Slate Storage | Bozeman | indoor, outdoor, covered | Boat | |
| The Barge Whitefish | Whitefish | indoor, outdoor, covered | Boat | |
| Snowbird Storage | Bigfork | indoor, outdoor, covered | Boat |
| City | Jet Ski & PWC Storage listings | Indoor | Climate-controlled | Outdoor |
|---|---|---|---|---|
| Billings | 5 | 5 | 0 | 5 |
| Bozeman | 3 | 3 | 0 | 3 |
| Great Falls | 3 | 3 | 0 | 3 |
| Missoula | 3 | 3 | 0 | 3 |
| Whitefish | 2 | 2 | 0 | 2 |
| Bigfork | 1 | 1 | 0 | 1 |
| Columbia Falls | 1 | 1 | 0 | 1 |
| Kalispell | 1 | 1 | 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 personal watercraft rule Billings stays on the water through August and Missoula through August, then 2 months of wetsuit weather follow at Billings. 19 Montana listings offer indoor or climate-controlled space.
7 at Billings (September to May) and 7 at Missoula (September to June), plus 2 and 3 months of wetsuit weather. Those off the water months hold 56.2 of the 57.4 inches of snow Billings averages a year (98%), which is the load on a cover or carport roof. At Billings a personal watercraft is on the water from June to August (3 months), against 2 at Missoula.
Of 19 live Montana listings, 19 list indoor space and 0 climate-controlled units, against 19 outdoor and 19 covered. By city: Billings (5 listed, 5 indoor), Bozeman (3 listed, 3 indoor), Great Falls (3 listed, 3 indoor) and Missoula (3 listed, 3 indoor). Most indoor listings: Billings (5), Bozeman (3) and Great Falls (3). Ask whether indoor means heated; listings span 8 cities in all.
At Billings, 5 months average a low at or below 32°F, all of them off the water months by our personal watercraft 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 off the water for a personal watercraft.
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 June the first month on the water at Billings and July at Missoula. That month Billings averages a 52.4°F low and a 77.0°F high. Reverse each winterization step first.
Montana jet ski & PWC storage listings span 8 cities, led by Billings (5 listed), Bozeman (3 listed), Great Falls (3 listed), Missoula (3 listed) and Whitefish (2 listed). For outdoor winter parking, Billings (5 outdoor) and Bozeman (3 outdoor) lead. Statewide, 19 list outdoor, 19 covered and 19 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).