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Badlands weather is unpredictable. Heavy rain, hail and high, often damaging winds are possible. Lighting strikes are common. During a severe electric storm, stay away from ridges, exposed places or isolated trees. Summer temperatures often exceed 100° F. Sunscreen, a hat and water are essential to avoid severe sunburn, dehydration and heat stroke. Winter travelers should be alert for approaching storms that can bring sleet, ice, heavy snow and blizzard conditions.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual | |
| High - °F | 34.0 | 40.0 | 48.0 | 62.0 | 72.0 | 83.0 | 92.0 | 91.0 | 81.0 | 68.0 | 50.0 | 39.0 | 63.0 |
| Low - °F | 11.0 | 16.0 | 24.0 | 36.0 | 46.0 | 56.0 | 62.0 | 61.0 | 51.0 | 39.0 | 26.0 | 17.0 | 37.0 |
| Avg Precip (in) | 0.29 | 0.48 | 0.90 | 1.83 | 2.75 | 3.12 | 1.94 | 1.45 | 1.23 | 0.90 | 0.41 | 0.30 | 15.60 |
