Rapid City, SD 14-Day Forecast
South Dakota, United States 🇺🇸
The 14-day forecast for Rapid City is temporarily unavailable - please check back shortly. Meanwhile, the monthly averages below give a reliable picture of what to expect.
Rapid City 14-day outlook: the story
August to October and May to June is the sweet spot for Rapid City - temperatures sit either side of the peak heat rather than in it. Expect 73°F (23°C) in the afternoon and around 8 days of rain in a typical month of it. For the same question asked the other way round, see where else is warm in August.
For typical conditions month by month, see the Rapid City climate & average temperatures guide.
Average temperatures in Rapid City by month
| Month | High | Low | Rain days | Precipitation | Sunshine | Daylight | Wet-day chance | Humidity |
|---|---|---|---|---|---|---|---|---|
| January | 37° | 18° | 4 | 0.5 in | 7.2 h/day | 9.2 h | 12% | 62% |
| February | 37° | 17° | 6 | 0.9 in | 8.2 h/day | 10.4 h | 23% | 58% |
| March | 47° | 26° | 6 | 1.1 in | 9.3 h/day | 11.8 h | 19% | 58% |
| April | 55° | 33° | 9 | 2.4 in | 10.2 h/day | 13.4 h | 31% | 58% |
| May | 65° | 45° | 12 | 3.4 in | 10.9 h/day | 14.7 h | 39% | 61% |
| June | 80° | 58° | 9 | 2.6 in | 13.1 h/day | 15.5 h | 30% | 55% |
| July | 86° | 63° | 8 | 1.6 in | 13.5 h/day | 15.2 h | 26% | 52% |
| August | 83° | 61° | 6 | 1.6 in | 12.6 h/day | 14.0 h | 20% | 52% |
| September | 76° | 54° | 5 | 1.1 in | 10.6 h/day | 12.4 h | 17% | 52% |
| October | 60° | 40° | 6 | 1.5 in | 8.9 h/day | 10.9 h | 19% | 55% |
| November | 48° | 29° | 4 | 0.6 in | 7.7 h/day | 9.6 h | 13% | 55% |
| December | 37° | 20° | 5 | 0.9 in | 6.8 h/day | 8.9 h | 16% | 61% |
14-day forecasts nearby