A personal watercraft in Wyoming is off the water for about 8 months a year at Cheyenne, and the median first 32°F night arrives September 22 at Casper (NOAA 1991-2020). 21 jet ski & PWC storage facilities are listed in Wyoming, 21 with indoor or climate-controlled space.
| Month | Cheyenne high / low | personal watercraft | Casper snow | Casper high / low | personal watercraft |
|---|---|---|---|---|---|
| Jan | 40° / 18° | off the water | 9.0 in | 35° / 15° | off the water |
| Feb | 41° / 18° | off the water | 10.9 in | 38° / 15° | off the water |
| Mar | 49° / 25° | off the water | 10.3 in | 49° / 23° | off the water |
| Apr | 55° / 31° | off the water | 10.5 in | 56° / 28° | off the water |
| May | 64° / 40° | off the water | 2.6 in | 67° / 37° | wetsuit weather |
| Jun | 77° / 49° | on the water | 0.1 in | 80° / 45° | on the water |
| Jul | 84° / 56° | on the water | 0.0 in | 89° / 53° | on the water |
| Aug | 82° / 54° | on the water | 0.0 in | 87° / 51° | on the water |
| Sep | 73° / 46° | wetsuit weather | 1.5 in | 76° / 42° | wetsuit weather |
| Oct | 59° / 34° | off the water | 7.0 in | 60° / 31° | off the water |
| Nov | 48° / 25° | off the water | 8.9 in | 46° / 22° | off the water |
| Dec | 39° / 18° | off the water | 11.0 in | 35° / 15° | 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 Cheyenne has 3 months on the water (June to August), 1 of wetsuit weather and 8 off the water. By that rule a personal watercraft at Casper has 3 months on the water (June to August), 2 of wetsuit weather and 7 off the water.
Wyoming is hard-freeze country: Casper logs about 183.1 nights at or below 32°F and 41.4 days that never thaw, enough to freeze any water left in the exhaust, cooling passages and pump housing.
21 live listings in 11 cities; by listed type: 21 indoor, 20 covered and 21 outdoor (types overlap). 1 publishes a monthly rate on StowHelp, from $35 to $35 (median $35).
| Facility | City | Listed storage | Listed amenities | Also listed for |
|---|---|---|---|---|
| Cottonwood Storage | Cody | indoor, outdoor, covered | Boat | |
| Adventure Ready RV Solutions | Casper | indoor, outdoor, covered | security cameras, gated entry | Boat |
| FC Elite Storage | Riverton | indoor, outdoor, covered | Boat | |
| Property Improvements Storage | Cheyenne | indoor, outdoor, covered | Boat | |
| Riverside Mini Storage | Casper | indoor, outdoor, covered | Boat | |
| Westbank Storage | Wilson | indoor, outdoor, covered | Boat | |
| Storage Stables | Jackson | indoor, outdoor, covered | Boat | |
| 4 Mile RV & Boat Storage | Laramie | indoor, outdoor, covered | security cameras, gated entry | Boat |
| City | Jet Ski & PWC Storage listings | Indoor | Climate-controlled | Outdoor |
|---|---|---|---|---|
| Casper | 5 | 5 | 0 | 5 |
| Cheyenne | 4 | 4 | 0 | 4 |
| Jackson | 3 | 3 | 0 | 3 |
| Cody | 2 | 2 | 0 | 2 |
| Alpine | 1 | 1 | 0 | 1 |
| Evanston | 1 | 1 | 0 | 1 |
| Laramie | 1 | 1 | 0 | 1 |
| Riverton | 1 | 1 | 0 | 1 |
| Sheridan | 1 | 1 | 0 | 1 |
| Thermopolis | 1 | 1 | 0 | 1 |
NOAA's 1991-2020 median first 32°F night is October 1 at Cheyenne and September 22 at Casper; winterize by September 8, two weeks ahead of the earlier date. By our personal watercraft rule Cheyenne stays on the water through August and Casper through August, then 1 month of wetsuit weather follow at Cheyenne. 21 Wyoming listings offer indoor or climate-controlled space.
8 at Cheyenne (September to May) and 7 at Casper (September to May), plus 1 and 2 months of wetsuit weather. Those off the water months hold 67.6 of the 71.8 inches of snow Casper averages a year (94%), which is the load on a cover or carport roof. At Cheyenne a personal watercraft is on the water from June to August (3 months), against 3 at Casper.
Of 21 live Wyoming listings, 21 list indoor space and 0 climate-controlled units, against 21 outdoor and 20 covered. By city: Casper (5 listed, 5 indoor), Cheyenne (4 listed, 4 indoor), Jackson (3 listed, 3 indoor) and Cody (2 listed, 2 indoor). Most indoor listings: Casper (5), Cheyenne (4) and Jackson (3). Ask whether indoor means heated; listings span 11 cities in all.
At Casper, 7 months average a low at or below 32°F, all of them off the water months by our personal watercraft rule. Casper logs 183.1 nights at or below 32°F and 14.6 at or below 0°F a year; December, the coldest month, averages 14.8°F and is off the water for a personal watercraft.
After the last frost. The median last 32°F night is May 12 at Cheyenne and May 26 at Casper; the last 28°F hard freeze comes around May 2 and May 11. Our rule makes June the first month on the water at Cheyenne and June at Casper. That month Cheyenne averages a 49.4°F low and a 76.7°F high. Reverse each winterization step first.
Wyoming jet ski & PWC storage listings span 11 cities, led by Casper (5 listed), Cheyenne (4 listed), Jackson (3 listed), Cody (2 listed) and Alpine (1 listed). For outdoor winter parking, Casper (5 outdoor) and Cheyenne (4 outdoor) lead. Statewide, 21 list outdoor, 20 covered and 21 indoor or climate-controlled spaces. Compare the cities nearest you before September 22.
NOAA NCEI Climate Normals 1991-2020 (USW00024018, USW00024089); NOAA AOML hurricane impacts 1851-2025; StowHelp listings 2026-10-07 (methodology).