Rapid City, SD Hourly Forecast
Rapid City temperature trend - Next 24 hours
The next 24 hours at a glance
- Warmest hour: 2 PM - around 86°
- Coolest hour: 11 PM - around 54°
- Highest rain chance: 8 AM (40%) - pack accordingly
- UV peak: 1 PM at index 6 - sun protection recommended
- Windiest: 4 AM at 19 mph
Rapid City hourly weather - Tuesday, September 15
In Rapid City, expect a high near 69°F (21°C) around 5 PM and a low of 54°F (12°C) near 11 PM, with no meaningful precipitation risk.
| Time | Conditions | Temp | Feels | Rain | Wind | Humidity | UV | |
|---|---|---|---|---|---|---|---|---|
| 5 PM | Sunny | 69° | 56° | 0% | 17 mph SE | 27% | 1 | |
| 6 PM | Partly Cloudy | 67° | 56° | 3% | 15 mph SE | 30% | 0 | |
| 7 PM | Sunny | 62° | 53° | 1% | 10 mph ESE | 37% | 0 | |
| 8 PM | Clear | 58° | 51° | 1% | 6 mph ESE | 44% | 0 | |
| 9 PM | Clear | 56° | 51° | 2% | 5 mph SSE | 47% | 0 | |
| 10 PM | Clear | 55° | 50° | 2% | 3 mph S | 50% | 0 | |
| 11 PM | Overcast | 54° | 51° | 12% | 4 mph S | 51% | 0 |
Rapid City hourly weather - Wednesday, September 16
In Rapid City, expect a high near 86°F (30°C) around 2 PM and a low of 55°F (13°C) near 12 AM; precipitation risk peaks at 40% around 8 AM.
| Time | Conditions | Temp | Feels | Rain | Wind | Humidity | UV | |
|---|---|---|---|---|---|---|---|---|
| 12 AM | Overcast | 55° | 50° | 12% | 6 mph S | 50% | 0 | |
| 1 AM | Overcast | 56° | 50° | 12% | 7 mph S | 48% | 0 | |
| 2 AM | Overcast | 57° | 50° | 12% | 9 mph S | 49% | 0 | |
| 3 AM | Overcast | 58° | 49° | 12% | 13 mph S | 50% | 0 | |
| 4 AM | Overcast | 60° | 47° | 11% | 19 mph S | 48% | 0 | |
| 5 AM | Overcast | 59° | 47° | 12% | 17 mph S | 52% | 0 | |
| 6 AM | Overcast | 58° | 47° | 13% | 16 mph S | 56% | 0 | |
| 7 AM | Patchy rain nearby | 58° | 49° | 20% | 14 mph S | 64% | 0 | |
| 8 AM | Light rain shower | 60° | 51° | 40% | 14 mph S | 64% | 0 | |
| 9 AM | Patchy rain nearby | 62° | 51° | 23% | 18 mph S | 61% | 1 | |
| 10 AM | Overcast | 65° | 55° | 13% | 18 mph S | 55% | 2 | |
| 11 AM | Patchy rain nearby | 70° | 60° | 17% | 17 mph S | 47% | 3 | |
| 12 PM | Patchy rain nearby | 75° | 66° | 17% | 16 mph S | 39% | 4 | |
| 1 PM | Cloudy | 83° | 74° | 6% | 15 mph SSE | 28% | 6 | |
| 2 PM | Partly Cloudy | 86° | 81° | 3% | 8 mph SSE | 23% | 5 | |
| 3 PM | Overcast | 86° | 79° | 8% | 10 mph ENE | 25% | 4 | |
| 4 PM | Overcast | 84° | 75° | 9% | 14 mph NNE | 27% | 2 | |
| 5 PM | Overcast | 82° | 74° | 9% | 12 mph NNE | 28% | 1 | |
| 6 PM | Overcast | 80° | 72° | 9% | 12 mph NNE | 29% | 0 | |
| 7 PM | Overcast | 73° | 65° | 9% | 10 mph N | 30% | 0 | |
| 8 PM | Overcast | 69° | 60° | 8% | 9 mph NW | 29% | 0 | |
| 9 PM | Overcast | 66° | 59° | 9% | 8 mph WNW | 31% | 0 | |
| 10 PM | Overcast | 66° | 58° | 9% | 8 mph WNW | 31% | 0 | |
| 11 PM | Overcast | 66° | 58° | 10% | 8 mph NW | 33% | 0 |
Rapid City hourly weather - Thursday, September 17
In Rapid City, expect a high near 66°F (19°C) around 1 PM and a low of 56°F (13°C) near 6 AM; precipitation risk peaks at 60% around 6 PM.
| Time | Conditions | Temp | Feels | Rain | Wind | Humidity | UV | |
|---|---|---|---|---|---|---|---|---|
| 12 AM | Overcast | 65° | 57° | 10% | 9 mph NW | 37% | 0 | |
| 1 AM | Overcast | 64° | 56° | 10% | 8 mph NW | 42% | 0 | |
| 2 AM | Overcast | 62° | 55° | 11% | 10 mph NW | 45% | 0 | |
| 3 AM | Overcast | 62° | 55° | 11% | 8 mph NW | 49% | 0 | |
| 4 AM | Patchy rain nearby | 60° | 53° | 12% | 8 mph NNW | 55% | 0 | |
| 5 AM | Overcast | 58° | 52° | 15% | 9 mph NNW | 62% | 0 | |
| 6 AM | Overcast | 56° | 51° | 20% | 9 mph NNW | 74% | 0 | |
| 7 AM | Light rain shower | 56° | 52° | 55% | 8 mph NNW | 82% | 0 | |
| 8 AM | Overcast | 58° | 54° | 20% | 8 mph N | 72% | 0 | |
| 9 AM | Light rain shower | 60° | 56° | 40% | 8 mph N | 69% | 1 | |
| 10 AM | Patchy rain nearby | 62° | 59° | 27% | 8 mph NNE | 69% | 2 | |
| 11 AM | Patchy rain nearby | 63° | 60° | 28% | 8 mph NNE | 70% | 3 | |
| 12 PM | Overcast | 66° | 62° | 17% | 8 mph NNE | 68% | 4 | |
| 1 PM | Light rain shower | 66° | 64° | 29% | 7 mph ENE | 69% | 4 | |
| 2 PM | Light rain shower | 64° | 63° | 41% | 4 mph NE | 77% | 1 | |
| 3 PM | Light rain shower | 63° | 63° | 44% | 4 mph NNW | 80% | 1 | |
| 4 PM | Light rain shower | 62° | 62° | 41% | 4 mph NNW | 83% | 0 | |
| 5 PM | Patchy rain nearby | 62° | 61° | 39% | 6 mph NNW | 85% | 0 | |
| 6 PM | Light rain shower | 62° | 62° | 60% | 4 mph NNW | 87% | 0 | |
| 7 PM | Patchy rain nearby | 62° | 61° | 38% | 5 mph N | 89% | 0 | |
| 8 PM | Overcast | 61° | 61° | 31% | 5 mph N | 92% | 0 | |
| 9 PM | Mist | 61° | 62° | 50% | 5 mph N | 96% | 0 | |
| 10 PM | Mist | 61° | 62° | 41% | 5 mph NNW | 96% | 0 | |
| 11 PM | Mist | 61° | 62° | 39% | 5 mph NNW | 97% | 0 |
Quick answers for the hours ahead
What is the warmest hour in Rapid City today?
Will it rain in Rapid City tonight?
When is the UV index highest in Rapid City today?
Rapid City hour-by-hour: what to expect
Over the next 24 hours in Rapid City, temperatures range from 54°F (12°C) around 11 PM up to 86°F (30°C) near 2 PM - about 10°F (6°C) above the typical September high of 76°F (25°C).
Precipitation is a real possibility: the chance of rain peaks at 40% around 8 AM. Wind picks up to 19 mph (30 km/h) from the S near 4 AM.
The “feels like” column blends humidity and wind into an apparent temperature - see how it works in our feels-like temperature guide. Planning further ahead? Check the Rapid City 14-day forecast or the monthly climate averages.