A boat in Wyoming is laid up for about 5 months a year at Cheyenne, and the median first 32°F night arrives September 22 at Casper (NOAA 1991-2020). 22 boat storage facilities are listed in Wyoming, 21 with indoor or climate-controlled space.
| Month | Cheyenne high / low | boat | Casper snow | Casper high / low | boat |
|---|---|---|---|---|---|
| Jan | 40° / 18° | laid up | 9.0 in | 35° / 15° | laid up |
| Feb | 41° / 18° | laid up | 10.9 in | 38° / 15° | laid up |
| Mar | 49° / 25° | laid up | 10.3 in | 49° / 23° | laid up |
| Apr | 55° / 31° | launch or haul-out | 10.5 in | 56° / 28° | launch or haul-out |
| May | 64° / 40° | launch or haul-out | 2.6 in | 67° / 37° | launch or haul-out |
| Jun | 77° / 49° | in the water | 0.1 in | 80° / 45° | in the water |
| Jul | 84° / 56° | in the water | 0.0 in | 89° / 53° | in the water |
| Aug | 82° / 54° | in the water | 0.0 in | 87° / 51° | in the water |
| Sep | 73° / 46° | in the water | 1.5 in | 76° / 42° | launch or haul-out |
| Oct | 59° / 34° | launch or haul-out | 7.0 in | 60° / 31° | launch or haul-out |
| Nov | 48° / 25° | laid up | 8.9 in | 46° / 22° | laid up |
| Dec | 39° / 18° | laid up | 11.0 in | 35° / 15° | laid up |
Boat column rule: in the water at a 65°F high and 45°F low or warmer; launch or haul-out from a 52°F high; laid up below.
By that rule a boat at Cheyenne has 4 months in the water (June to September), 3 of launch or haul-out and 5 laid up. By that rule a boat at Casper has 3 months in the water (June to August), 4 of launch or haul-out and 5 laid up.
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 engine block, raw-water passages, outdrive and plumbing.
22 live listings in 12 cities; by listed type: 21 indoor, 20 covered and 22 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 |
|---|---|---|---|---|
| A+ Secure Storage | Cody | indoor, outdoor, covered | security cameras, gated entry | Jet Ski |
| Interstate Storage | Sheridan | indoor, outdoor, covered | Jet Ski | |
| Alpine Lakes Commercial Center | Alpine | indoor, outdoor, covered | security cameras, gated entry | Jet Ski |
| I-25 RV Storage | Cheyenne | indoor, outdoor, covered | Jet Ski | |
| Toybox Recreational Storage | Evanston | indoor, outdoor, covered | Jet Ski | |
| Summit Self Storage | Jackson | indoor, outdoor, covered | 24-hour access, security cameras, gated entry, on-site manager | RV, Car, Motorcycle, ATV, Jet Ski, Trailer, Snowmobile, Kayak, Golf Cart |
| 4 Mile RV & Boat Storage | Laramie | indoor, outdoor, covered | security cameras, gated entry | Jet Ski |
| Casper RV Storage | Casper | indoor, outdoor, covered | Jet Ski | |
| Storage Stables | Jackson | indoor, outdoor, covered | Jet Ski | |
| Cowboy Storage | Cheyenne | indoor, outdoor, covered | Jet Ski | |
| Colter Bay Marina | Colter Bay Village | outdoor | ||
| Grand Storage | Thermopolis | indoor, outdoor | 24-hour access | RV, Car, Motorcycle, Trailer, Jet Ski, ATV, Snowmobile |
| Adventure Ready RV Solutions | Casper | indoor, outdoor, covered | security cameras, gated entry | Jet Ski |
| City | Boat 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 |
| Colter Bay Village | 1 | 0 | 0 | 1 |
| Evanston | 1 | 1 | 0 | 1 |
| Laramie | 1 | 1 | 0 | 1 |
| Riverton | 1 | 1 | 0 | 1 |
| Sheridan | 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 boat rule Cheyenne stays in the water through September and Casper through August, then 3 months of launch or haul-out follow at Cheyenne. 21 Wyoming listings offer indoor or climate-controlled space.
5 at Cheyenne (October to May) and 5 at Casper (September to May), plus 3 and 4 months of launch or haul-out. Those laid up months hold 50.1 of the 71.8 inches of snow Casper averages a year (70%), which is the load on a cover or carport roof. At Cheyenne a boat is in the water from June to September (4 months), against 3 at Casper.
Of 22 live Wyoming listings, 21 list indoor space and 0 climate-controlled units, against 22 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 12 cities in all.
At Casper, 7 months average a low at or below 32°F: 5 laid up and 2 launch or haul-out or in the water by our boat 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 laid up for a boat. Drain or re-protect the boat after any outing in those 2 months.
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 in 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 boat storage listings span 12 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, 22 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).