South Dakota weather in August: Statewide normals and every place, NOAA 1991-2020
In August, South Dakota's statewide normal high is 84°F and normal low 57°F; normal highs run from 78°F in Astoria to 91°F in Interior (NOAA 1991-2020 normals).
- Statewide normal high
- 84°FAugust, 1991-2020
- Statewide normal low
- 57°FAugust, 1991-2020
- Statewide normal precipitation
- 2.32 inAugust
- Warmest place
- 91°Fnormal high, Interior
- Coolest place
- 78°Fnormal high, Astoria
Where is South Dakota warmest and wettest in August?
Interior has the warmest August afternoons (91°F) and Astoria the coolest (78°F). Bridgewater gets the most precipitation (3.73 in) and Buffalo the least (1.13 in).
Statewide, August averaged 72.5°F in 2021, 73.2°F in 2022, 71.6°F in 2023, 70.7°F in 2024, 71.0°F in 2025, 71.8°F in 2026, against a 1991-2020 normal of 70.6°F.
| Place | High | Low | Precip. | Snow |
|---|---|---|---|---|
| Sioux Falls | 83°F | 61°F | 3.34 | 0.0 |
| Rapid City | 85°F | 56°F | 1.59 | 0.0 |
| Aberdeen | 83°F | 57°F | 2.24 | 0.0 |
| Brookings | 79°F | 57°F | 3.22 | 0.0 |
| Watertown | 80°F | 58°F | 2.89 | 0.0 |
| Yankton | 85°F | 62°F | 3.26 | 0.0 |
| Mitchell | 84°F | 61°F | 3.14 | – |
| Huron | 83°F | 59°F | 2.59 | 0.0 |
| Spearfish | 83°F | 56°F | 1.88 | 0.0 |
| Pierre | 87°F | 59°F | 1.95 | 0.0 |
| Vermillion | 83°F | 61°F | 2.88 | – |
| Madison | 81°F | 58°F | 3.38 | 0.0 |
| Belle Fourche | 87°F | 57°F | 1.50 | 0.0 |
| Hot Springs | 87°F | 55°F | 2.00 | 0.0 |
| Milbank | 79°F | 57°F | 3.21 | – |
| Mobridge | 86°F | 60°F | 2.05 | 0.0 |
| Lead | 81°F | 55°F | 2.32 | 0.0 |
| Canton | 80°F | 59°F | 2.99 | 0.0 |
| Winner | 87°F | 62°F | 2.53 | – |
| Pine Ridge | 88°F | 57°F | 1.48 | – |
| Chamberlain | 86°F | 61°F | 2.28 | – |
| Sisseton | 81°F | 57°F | 2.61 | 0.0 |
| Flandreau | 79°F | 57°F | 3.60 | 0.0 |
| Redfield | 82°F | 57°F | 2.68 | – |
| Custer | 78°F | 52°F | 2.12 | – |
| Webster | 79°F | 59°F | 2.97 | 0.0 |
| Oglala | 88°F | 58°F | – | – |
| Kyle | 88°F | 57°F | 2.55 | – |
| Wagner | 86°F | 62°F | 3.00 | – |
| Deadwood | 82°F | 54°F | – | – |
| Salem | 81°F | 58°F | 3.35 | – |
| Miller | 83°F | 58°F | 2.46 | 0.0 |
| Gregory | 85°F | 59°F | 3.14 | 0.0 |
| Clear Lake | 78°F | 58°F | 3.37 | 0.0 |
| Britton | 81°F | 56°F | 2.50 | 0.0 |
| Clark | 79°F | 58°F | 2.77 | – |
| Lemmon | 86°F | 57°F | 2.11 | 0.0 |
| Mission | 86°F | 59°F | 1.80 | 0.0 |
| Tyndall | 83°F | 60°F | 3.27 | 0.0 |
| Gettysburg | 83°F | 58°F | 2.49 | 0.0 |
| De Smet | 79°F | 59°F | 3.07 | 0.0 |
| Centerville | 82°F | 59°F | 3.20 | 0.0 |
| Hill City | 82°F | 48°F | 2.34 | 0.0 |
| Ipswich | 82°F | 57°F | 2.40 | 0.0 |
| Arlington | 80°F | 59°F | 3.08 | – |
| Martin | 86°F | 57°F | 2.16 | 0.0 |
| Howard | 85°F | 58°F | 2.89 | 0.0 |
| Faulkton | 83°F | 57°F | 2.67 | 0.0 |
| Wessington Springs | 82°F | 59°F | 2.90 | 0.0 |
| Edgemont | 87°F | 52°F | 1.50 | 0.0 |
| Eureka | 81°F | 56°F | 2.24 | 0.0 |
| Philip | 89°F | 58°F | 1.48 | – |
| Castlewood | 81°F | 56°F | 3.08 | – |
| Armour | 86°F | 60°F | 2.84 | 0.0 |
| Johnson Siding | 81°F | 52°F | 2.14 | – |
| Alexandria | 82°F | 57°F | 3.02 | 0.0 |
| Highmore | 85°F | 59°F | 2.60 | 0.0 |
| Onida | 85°F | 59°F | 2.51 | 0.0 |
| Menno | 83°F | 61°F | 3.28 | 0.0 |
| Selby | 83°F | 58°F | 2.41 | 0.0 |
| Newell | 85°F | 57°F | 1.30 | 0.0 |
| Timber Lake | 85°F | 58°F | 1.78 | 0.0 |
| Bridgewater | 82°F | 60°F | 3.73 | – |
| Dupree | 90°F | 58°F | 1.79 | 0.0 |
| Waubay | 81°F | 61°F | 2.26 | 0.0 |
| Presho | 86°F | 57°F | – | – |
| Murdo | 85°F | 61°F | 2.37 | 0.0 |
| Montrose | 81°F | 59°F | – | – |
| Wilmot | 80°F | 57°F | 2.69 | 0.0 |
| Leola | 81°F | 56°F | 2.98 | – |
| White Lake | 83°F | 60°F | 2.58 | 0.0 |
| Faith | 85°F | 58°F | 1.43 | – |
| Buffalo | 85°F | 56°F | 1.13 | – |
| Bison | 86°F | 57°F | 1.83 | 0.0 |
| Kennebec | 88°F | 59°F | 2.31 | 0.0 |
| Roscoe | 81°F | 56°F | 2.30 | 0.0 |
| Summit | 80°F | 56°F | 2.97 | 0.0 |
| Bonesteel | 85°F | 60°F | 2.79 | 0.0 |
| Pickstown | 86°F | 62°F | 2.75 | 0.0 |
| Pollock | 84°F | 57°F | 2.18 | 0.0 |
| Mellette | 82°F | 55°F | 2.54 | 0.0 |
| Wentworth | 81°F | 59°F | 3.26 | 0.0 |
| Columbia | 81°F | 57°F | 2.62 | 0.0 |
| Conde | 82°F | 57°F | 2.69 | 0.0 |
| Astoria | 78°F | 58°F | – | – |
| Oelrichs | 88°F | 56°F | 1.54 | 0.0 |
| Midland | 88°F | 58°F | – | – |
| Andover | 80°F | 59°F | 2.74 | – |
| Camp Crook | 88°F | 55°F | 1.60 | 0.0 |
| Interior | 91°F | 60°F | 1.81 | 0.0 |
| Wasta | 88°F | 58°F | 1.56 | 0.0 |
| Turton | 83°F | 58°F | 2.46 | – |
| Wood | 86°F | 58°F | 1.94 | 0.0 |
| Forestburg | 83°F | 57°F | 3.05 | 0.0 |
| Winfred | 81°F | 59°F | 3.26 | – |
| Oral | 88°F | 53°F | 2.01 | 0.0 |
| Cottonwood | 88°F | 56°F | 1.63 | 0.0 |
| Stephan | 84°F | 58°F | 2.17 | 0.0 |
| Gann Valley | 85°F | 58°F | 2.91 | 0.0 |
| Aberdeen (35 mi WNW) | 79°F | 56°F | 2.06 | – |
| Academy (2 mi NE) | 85°F | 60°F | 2.99 | 0.0 |
| Antelope Ranger Station | 86°F | 53°F | – | – |
| Ardmore | 90°F | 54°F | 1.71 | 0.0 |
| Bear Ridge | 87°F | 53°F | 2.04 | 0.0 |
| Cedar Butte | 88°F | 60°F | 2.17 | 0.0 |
| Elm Springs (3 mi ESE) | 87°F | 57°F | 1.55 | 0.0 |
| Fort Meade | 86°F | 58°F | 1.72 | 0.0 |
| Fort Pierre (17 mi WSW) | 88°F | 59°F | 2.20 | 0.0 |
| Glad Valley (2 mi W) | 84°F | 56°F | 2.00 | 0.0 |
| Harrington | 86°F | 58°F | 2.04 | 0.0 |
| Harrold (12 mi SSW) | 86°F | 56°F | 1.93 | 0.0 |
| Hereford (12 mi SW) | 86°F | 57°F | 1.57 | 0.0 |
| Hoover | 87°F | 52°F | 1.91 | 0.0 |
| Kirley (6 mi N) | 88°F | 58°F | 1.92 | 0.0 |
| Ladner (9 mi SW) | 83°F | 55°F | 1.83 | 0.0 |
| Lake Sharpe Project | 86°F | 59°F | 2.22 | 0.0 |
| Lodgepole (5 mi SW) | 82°F | 49°F | 2.09 | – |
| Longvalley | 88°F | 59°F | 1.78 | – |
| Ludlow (3 mi SSE) | 84°F | 55°F | 1.41 | – |
| Manderson (3 mi NE) | 87°F | 59°F | – | – |
| Maurine (12 mi SW) | 87°F | 56°F | 1.67 | 0.0 |
| McIntosh (6 mi SE) | 85°F | 57°F | 1.93 | 0.0 |
| McLaughlin | 84°F | 55°F | 2.47 | 0.0 |
| Milesville (5 mi NE) | 87°F | 59°F | 1.77 | 0.0 |
| Mission Ridge (5 mi NW) | 86°F | 60°F | 1.56 | – |
| Mount Rushmore National Memorial | 78°F | 58°F | 2.29 | 0.0 |
| Oahe Dam | 87°F | 59°F | 2.27 | – |
| Pactola Dam | 78°F | 49°F | 2.38 | 0.0 |
| Pierre (24 mi S) | 85°F | 59°F | 2.29 | – |
| Plainview (6 mi SSW) | 86°F | 55°F | 1.41 | 0.0 |
| Porcupine (11 mi N) | 88°F | 55°F | 2.02 | – |
| Ralph (1 mi N) | 86°F | 54°F | 1.39 | – |
| Rauville (2 mi W) | 80°F | 56°F | 2.66 | 0.0 |
| Red Owl | 85°F | 54°F | 1.63 | 0.0 |
| Redig (11 mi NE) | 87°F | 54°F | 2.12 | 0.0 |
| Rochford (2 mi WNW) | 79°F | 40°F | – | – |
| Roy Lake | 81°F | 60°F | 2.62 | 0.0 |
| Shadehill Reservoir | 86°F | 54°F | – | – |
| Victor (4 mi N) | 80°F | 57°F | 2.89 | 0.0 |
| Wind Cave | 84°F | 55°F | 2.30 | 0.0 |
| Zeona (10 mi SSW) | 87°F | 56°F | – | – |
Source: NOAA NCEI nClimDiv statewide normals; NOAA NCEI 1991-2020 monthly normals for each station.