Click on a day for an hourly weather forecast
The weather in Rapid City in July is hot. The average temperatures are between 18°C and 30°C. Usually the days in July are hot while the nights are a bit cooler.
You can expect about 3 to 8 days of rain in Rapid City during the month of July. It’s a good idea to bring along your umbrella so that you don’t get caught in poor weather.
Our weather forecast can give you a great sense of what weather to expect in Rapid City in July 2025.
If you’re planning to visit Rapid City in the near future, we highly recommend that you review the 14 day weather forecast for Rapid City before you arrive.
| Month | Temperatures | Rainy Days | Dry Days | Snowy Days | Rainfall | Weather | More details |
|---|---|---|---|---|---|---|---|
| January | 1° / -7° | 5 | 14 | 13 | 23 mm | Awful | Rapid City in January |
| February | 1° / -8° | 5 | 10 | 14 | 35 mm | Awful | Rapid City in February |
| March | 8° / -2° | 5 | 17 | 10 | 57 mm | Bad | Rapid City in March |
| April | 12° / 1° | 7 | 16 | 7 | 115 mm | Awful | Rapid City in April |
| May | 18° / 7° | 10 | 19 | 2 | 139 mm | Bad | Rapid City in May |
| June | 26° / 13° | 7 | 23 | 0 | 122 mm | Good | Rapid City in June |
| July | 30° / 18° | 7 | 24 | 0 | 117 mm | Ok | Rapid City in July |
| August | 29° / 17° | 6 | 25 | 0 | 96 mm | Good | Rapid City in August |
| September | 24° / 13° | 3 | 27 | 0 | 56 mm | Perfect | Rapid City in September |
| October | 14° / 4° | 3 | 23 | 4 | 63 mm | Ok | Rapid City in October |
| November | 8° / -1° | 3 | 21 | 6 | 25 mm | Bad | Rapid City in November |
| December | 1° / -7° | 3 | 17 | 11 | 30 mm | Awful | Rapid City in December |