A boat in South Dakota is laid up for about 5 months a year at Sioux Falls, and the median first 32°F night arrives October 1 at Rapid City (NOAA 1991-2020). 22 boat storage facilities are listed in South Dakota, 20 with indoor or climate-controlled space.
| Month | Sioux Falls high / low | boat | Rapid City snow | Rapid City high / low | boat |
|---|---|---|---|---|---|
| Jan | 27° / 9° | laid up | 5.3 in | 36° / 13° | laid up |
| Feb | 32° / 13° | laid up | 7.7 in | 38° / 14° | laid up |
| Mar | 45° / 24° | laid up | 8.4 in | 48° / 23° | laid up |
| Apr | 59° / 36° | launch or haul-out | 10.1 in | 57° / 31° | launch or haul-out |
| May | 71° / 48° | in the water | 1.5 in | 67° / 42° | launch or haul-out |
| Jun | 81° / 59° | in the water | 0.0 in | 78° / 52° | in the water |
| Jul | 85° / 63° | in the water | 0.0 in | 86° / 59° | in the water |
| Aug | 83° / 61° | in the water | 0.0 in | 85° / 56° | in the water |
| Sep | 76° / 52° | in the water | 0.1 in | 76° / 46° | in the water |
| Oct | 61° / 38° | launch or haul-out | 3.0 in | 60° / 34° | launch or haul-out |
| Nov | 45° / 25° | laid up | 5.7 in | 47° / 22° | laid up |
| Dec | 32° / 13° | laid up | 6.7 in | 37° / 14° | 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 Sioux Falls has 5 months in the water (May to September), 2 of launch or haul-out and 5 laid up. By that rule a boat at Rapid City has 4 months in the water (June to September), 3 of launch or haul-out and 5 laid up.
South Dakota is severe-freeze country for a boat: Sioux Falls averages 8.5°F on January nights and about 24.9 nights a year at or below 0°F, so full winterization is mandatory and heated space is worth pricing.
22 live listings in 9 cities; by listed type: 20 indoor, 20 covered and 22 outdoor (types overlap). No South Dakota boat storage listing publishes a rate on StowHelp.
| Facility | City | Listed storage | Listed amenities | Also listed for |
|---|---|---|---|---|
| HealdSafe Storage | Rapid City | indoor, outdoor, covered | Jet Ski | |
| Black Hills Boat and Buggy | Rapid City | indoor, outdoor, covered | security cameras, gated entry | Jet Ski |
| Five Star Storage - Sundowner Sioux Falls | Sioux Falls | indoor, outdoor, covered | Jet Ski | |
| Black Dog Storage | Harrisburg | indoor, outdoor, covered | security cameras, gated entry | Jet Ski |
| SoDak Storage | Spearfish | indoor, outdoor, covered | Jet Ski | |
| New Prairie Storage | Sioux Falls | indoor, outdoor, covered | Jet Ski | |
| Proud Angler Storage | Pierre | indoor, outdoor, covered | Jet Ski | |
| B-21 Storage | Box Elder | indoor, outdoor, covered | security cameras, gated entry | Jet Ski |
| City | Boat Storage listings | Indoor | Climate-controlled | Outdoor |
|---|---|---|---|---|
| Rapid City | 7 | 5 | 0 | 7 |
| Sioux Falls | 5 | 5 | 0 | 5 |
| Box Elder | 2 | 2 | 0 | 2 |
| Harrisburg | 2 | 2 | 0 | 2 |
| Pierre | 2 | 2 | 0 | 2 |
| Aberdeen | 1 | 1 | 0 | 1 |
| Hill City | 1 | 1 | 0 | 1 |
| Spearfish | 1 | 1 | 0 | 1 |
| Summerset | 1 | 1 | 0 | 1 |
NOAA's 1991-2020 median first 32°F night is October 6 at Sioux Falls and October 1 at Rapid City; winterize by September 17, two weeks ahead of the earlier date. By our boat rule Sioux Falls stays in the water through September and Rapid City through September, then 2 months of launch or haul-out follow at Sioux Falls. 20 South Dakota listings offer indoor or climate-controlled space.
5 at Sioux Falls (October to April) and 5 at Rapid City (October to May), plus 2 and 3 months of launch or haul-out. Those laid up months hold 33.8 of the 48.5 inches of snow Rapid City averages a year (70%), which is the load on a cover or carport roof. At Sioux Falls a boat is in the water from May to September (5 months), against 4 at Rapid City.
Of 22 live South Dakota listings, 20 list indoor space and 0 climate-controlled units, against 22 outdoor and 20 covered. By city: Rapid City (7 listed, 5 indoor), Sioux Falls (5 listed, 5 indoor), Box Elder (2 listed, 2 indoor) and Harrisburg (2 listed, 2 indoor). Most indoor listings: Rapid City (5), Sioux Falls (5) and Box Elder (2). Ask whether indoor means heated; listings span 9 cities in all.
At Sioux Falls, 5 months average a low at or below 32°F, all of them laid up months by our boat rule. Sioux Falls logs 162.0 nights at or below 32°F and 24.9 at or below 0°F a year; January, the coldest month, averages 8.5°F and is laid up for a boat.
After the last frost. The median last 32°F night is May 1 at Sioux Falls and May 12 at Rapid City; the last 28°F hard freeze comes around April 22 and May 2. Our rule makes May the first month in the water at Sioux Falls and June at Rapid City. That month Sioux Falls averages a 47.5°F low and a 70.8°F high. Reverse each winterization step first.
South Dakota boat storage listings span 9 cities, led by Rapid City (7 listed), Sioux Falls (5 listed), Box Elder (2 listed), Harrisburg (2 listed) and Pierre (2 listed). For outdoor winter parking, Rapid City (7 outdoor) and Sioux Falls (5 outdoor) lead. Statewide, 22 list outdoor, 20 covered and 20 indoor or climate-controlled spaces. Compare the cities nearest you before October 1.
NOAA NCEI Climate Normals 1991-2020 (USW00014944, USW00024090); NOAA AOML hurricane impacts 1851-2025; StowHelp listings 2026-10-07 (methodology).