Rapid City, SD Hourly Forecast
Rapid City temperature trend - Next 24 hours
The next 24 hours at a glance
- Warmest hour: 1 PM - around 86°
- Coolest hour: 6 AM - around 69°
- Rain risk: low all day (peaks at 11%)
- UV peak: 12 PM at index 4 - sun protection recommended
- Windiest: 12 PM at 16 mph
Rapid City hourly weather - Tuesday, August 11
In Rapid City, expect a high near 72°F (22°C) around 9 PM and a low of 72°F (22°C) near 8 PM, with no meaningful precipitation risk.
| Time | Conditions | Temp | Feels | Rain | Wind | Humidity | UV | |
|---|---|---|---|---|---|---|---|---|
| 8 PM | Sunny | 72° | 73° | 5% | 4 mph NNW | 69% | 0 | |
| 9 PM | Clear | 72° | 72° | 8% | 9 mph NNE | 76% | 0 | |
| 10 PM | Clear | 72° | 74° | 8% | 5 mph NNW | 77% | 0 | |
| 11 PM | Clear | 72° | 75° | 9% | 4 mph WNW | 81% | 0 |
Rapid City hourly weather - Wednesday, August 12
In Rapid City, expect a high near 86°F (30°C) around 1 PM and a low of 67°F (20°C) near 11 PM; precipitation risk peaks at 36% around 11 PM.
| Time | Conditions | Temp | Feels | Rain | Wind | Humidity | UV | |
|---|---|---|---|---|---|---|---|---|
| 12 AM | Clear | 71° | 75° | 11% | 3 mph WSW | 85% | 0 | |
| 1 AM | Clear | 71° | 73° | 10% | 6 mph WSW | 83% | 0 | |
| 2 AM | Clear | 70° | 72° | 9% | 6 mph WSW | 81% | 0 | |
| 3 AM | Clear | 70° | 72° | 10% | 6 mph WSW | 82% | 0 | |
| 4 AM | Clear | 70° | 72° | 10% | 5 mph W | 83% | 0 | |
| 5 AM | Clear | 69° | 73° | 11% | 3 mph W | 85% | 0 | |
| 6 AM | Sunny | 69° | 72° | 11% | 2 mph SE | 84% | 0 | |
| 7 AM | Sunny | 69° | 68° | 5% | 5 mph SSE | 61% | 0 | |
| 8 AM | Partly Cloudy | 74° | 71° | 4% | 9 mph SSE | 53% | 1 | |
| 9 AM | Partly Cloudy | 77° | 73° | 4% | 10 mph SSE | 46% | 1 | |
| 10 AM | Partly Cloudy | 79° | 78° | 4% | 10 mph SSE | 42% | 2 | |
| 11 AM | Partly Cloudy | 82° | 76° | 4% | 13 mph SSE | 37% | 3 | |
| 12 PM | Partly Cloudy | 86° | 77° | 4% | 16 mph SSE | 31% | 4 | |
| 1 PM | Partly Cloudy | 86° | 80° | 3% | 10 mph S | 26% | 4 | |
| 2 PM | Overcast | 85° | 82° | 8% | 6 mph WNW | 26% | 3 | |
| 3 PM | Partly Cloudy | 84° | 80° | 3% | 6 mph N | 28% | 2 | |
| 4 PM | Sunny | 83° | 77° | 1% | 9 mph ENE | 29% | 1 | |
| 5 PM | Sunny | 84° | 78° | 1% | 9 mph E | 26% | 1 | |
| 6 PM | Sunny | 84° | 77° | 1% | 10 mph E | 26% | 0 | |
| 7 PM | Patchy rain nearby | 82° | 74° | 8% | 12 mph E | 31% | 0 | |
| 8 PM | Patchy rain nearby | 74° | 69° | 19% | 12 mph ESE | 48% | 0 | |
| 9 PM | Partly Cloudy | 70° | 67° | 5% | 7 mph SSE | 57% | 0 | |
| 10 PM | Patchy rain nearby | 68° | 66° | 14% | 6 mph S | 58% | 0 | |
| 11 PM | Patchy rain nearby | 67° | 65° | 36% | 7 mph SSE | 64% | 0 |
Rapid City hourly weather - Thursday, August 13
In Rapid City, expect a high near 82°F (28°C) around 1 PM and a low of 61°F (16°C) near 6 AM; precipitation risk peaks at 66% around 11 PM.
| Time | Conditions | Temp | Feels | Rain | Wind | Humidity | UV | |
|---|---|---|---|---|---|---|---|---|
| 12 AM | Patchy rain nearby | 66° | 66° | 24% | 5 mph SSE | 73% | 0 | |
| 1 AM | Patchy rain nearby | 65° | 64° | 22% | 5 mph S | 76% | 0 | |
| 2 AM | Patchy rain nearby | 64° | 63° | 17% | 7 mph SSE | 78% | 0 | |
| 3 AM | Partly Cloudy | 64° | 62° | 12% | 7 mph SSE | 81% | 0 | |
| 4 AM | Partly Cloudy | 62° | 62° | 13% | 4 mph S | 84% | 0 | |
| 5 AM | Clear | 62° | 62° | 13% | 3 mph SE | 87% | 0 | |
| 6 AM | Patchy rain nearby | 61° | 61° | 39% | 4 mph SSE | 91% | 0 | |
| 7 AM | Partly Cloudy | 64° | 65° | 15% | 6 mph S | 86% | 0 | |
| 8 AM | Patchy rain nearby | 68° | 67° | 53% | 8 mph S | 78% | 1 | |
| 9 AM | Patchy rain nearby | 71° | 69° | 40% | 10 mph SSE | 71% | 2 | |
| 10 AM | Partly Cloudy | 74° | 71° | 8% | 12 mph SE | 63% | 4 | |
| 11 AM | Partly Cloudy | 77° | 73° | 6% | 14 mph SE | 57% | 6 | |
| 12 PM | Partly Cloudy | 80° | 80° | 4% | 16 mph SE | 51% | 7 | |
| 1 PM | Patchy rain nearby | 82° | 82° | 9% | 17 mph SE | 48% | 6 | |
| 2 PM | Patchy rain nearby | 81° | 82° | 5% | 16 mph SE | 48% | 3 | |
| 3 PM | Patchy rain nearby | 80° | 80° | 17% | 16 mph SE | 51% | 1 | |
| 4 PM | Patchy rain nearby | 80° | 79° | 8% | 17 mph ESE | 52% | 1 | |
| 5 PM | Patchy rain nearby | 80° | 78° | 9% | 18 mph ESE | 50% | 1 | |
| 6 PM | Light rain shower | 79° | 77° | 17% | 16 mph SE | 51% | 0 | |
| 7 PM | Light drizzle | 76° | 72° | 36% | 14 mph SSE | 57% | 0 | |
| 8 PM | Light rain shower | 70° | 70° | 57% | 8 mph S | 73% | 0 | |
| 9 PM | Light rain shower | 68° | 71° | 64% | 4 mph SSE | 83% | 0 | |
| 10 PM | Light rain shower | 68° | 69° | 60% | 6 mph ESE | 82% | 0 | |
| 11 PM | Light rain shower | 68° | 68° | 66% | 9 mph SE | 84% | 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 69°F (20°C) around 6 AM up to 86°F (30°C) near 1 PM - about 3°F (2°C) above the typical August high of 83°F (28°C).
Precipitation chances stay minimal throughout, so plans can skip the umbrella. Wind picks up to 16 mph (26 km/h) from the SSE near 12 PM.
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.