Rapid City, SD Hourly Forecast
Rapid City temperature trend - Next 24 hours
The next 24 hours at a glance
- Warmest hour: 3 PM - around 86°
- Coolest hour: 6 AM - around 64°
- Rain risk: low all day (peaks at 17%)
- UV peak: 1 PM at index 7 - sun protection recommended
- Windiest: 11 AM at 9 mph
Rapid City hourly weather - Wednesday, August 26
In Rapid City, expect a high near 86°F (30°C) around 3 PM and a low of 69°F (21°C) near 11 PM; precipitation risk peaks at 17% around 4 PM.
| Time | Conditions | Temp | Feels | Rain | Wind | Humidity | UV | |
|---|---|---|---|---|---|---|---|---|
| 12 PM | Partly Cloudy | 80° | 75° | 2% | 8 mph ESE | 28% | 7 | |
| 1 PM | Overcast | 82° | 77° | 9% | 8 mph ESE | 26% | 7 | |
| 2 PM | Sunny | 85° | 80° | 1% | 7 mph ESE | 24% | 7 | |
| 3 PM | Overcast | 86° | 81° | 8% | 7 mph E | 22% | 5 | |
| 4 PM | Patchy rain nearby | 83° | 78° | 17% | 7 mph E | 27% | 3 | |
| 5 PM | Patchy rain nearby | 83° | 77° | 8% | 8 mph E | 28% | 2 | |
| 6 PM | Sunny | 82° | 77° | 1% | 6 mph E | 28% | 1 | |
| 7 PM | Sunny | 78° | 75° | 1% | 4 mph ESE | 34% | 0 | |
| 8 PM | Clear | 73° | 69° | 1% | 5 mph SE | 36% | 0 | |
| 9 PM | Clear | 71° | 67° | 1% | 6 mph SSE | 37% | 0 | |
| 10 PM | Clear | 69° | 66° | 1% | 4 mph SSW | 39% | 0 | |
| 11 PM | Clear | 69° | 64° | 1% | 6 mph SW | 39% | 0 |
Rapid City hourly weather - Thursday, August 27
In Rapid City, expect a high near 91°F (33°C) around 4 PM and a low of 64°F (18°C) near 6 AM; precipitation risk peaks at 17% around 7 PM.
| Time | Conditions | Temp | Feels | Rain | Wind | Humidity | UV | |
|---|---|---|---|---|---|---|---|---|
| 12 AM | Clear | 67° | 63° | 1% | 5 mph SW | 42% | 0 | |
| 1 AM | Clear | 67° | 62° | 2% | 5 mph SW | 46% | 0 | |
| 2 AM | Clear | 66° | 62° | 2% | 6 mph SW | 51% | 0 | |
| 3 AM | Clear | 65° | 62° | 3% | 5 mph WSW | 57% | 0 | |
| 4 AM | Clear | 65° | 63° | 4% | 5 mph SSW | 60% | 0 | |
| 5 AM | Clear | 64° | 62° | 4% | 5 mph WSW | 63% | 0 | |
| 6 AM | Clear | 64° | 62° | 5% | 4 mph W | 65% | 0 | |
| 7 AM | Sunny | 66° | 67° | 4% | 1 mph N | 63% | 0 | |
| 8 AM | Sunny | 71° | 70° | 2% | 3 mph E | 52% | 1 | |
| 9 AM | Partly Cloudy | 74° | 73° | 6% | 4 mph ESE | 48% | 2 | |
| 10 AM | Sunny | 77° | 75° | 2% | 6 mph SE | 43% | 4 | |
| 11 AM | Sunny | 81° | 77° | 1% | 9 mph SE | 38% | 5 | |
| 12 PM | Sunny | 85° | 79° | 1% | 11 mph SSE | 33% | 7 | |
| 1 PM | Sunny | 88° | 81° | 1% | 12 mph SSE | 28% | 7 | |
| 2 PM | Cloudy | 90° | 83° | 6% | 12 mph SSE | 25% | 1 | |
| 3 PM | Partly Cloudy | 89° | 82° | 4% | 13 mph SE | 25% | 1 | |
| 4 PM | Overcast | 91° | 84° | 9% | 11 mph SE | 23% | 2 | |
| 5 PM | Overcast | 85° | 79° | 8% | 11 mph SE | 28% | 2 | |
| 6 PM | Overcast | 88° | 82° | 8% | 11 mph SE | 25% | 1 | |
| 7 PM | Light rain shower | 82° | 77° | 17% | 9 mph ESE | 32% | 0 | |
| 8 PM | Patchy rain nearby | 77° | 73° | 17% | 7 mph SSE | 37% | 0 | |
| 9 PM | Partly Cloudy | 75° | 72° | 3% | 5 mph S | 41% | 0 | |
| 10 PM | Partly Cloudy | 74° | 71° | 3% | 6 mph SSW | 42% | 0 | |
| 11 PM | Overcast | 74° | 70° | 10% | 7 mph SW | 44% | 0 |
Rapid City hourly weather - Friday, August 28
In Rapid City, expect a high near 96°F (35°C) around 1 PM and a low of 72°F (22°C) near 3 AM, with no meaningful precipitation risk.
| Time | Conditions | Temp | Feels | Rain | Wind | Humidity | UV | |
|---|---|---|---|---|---|---|---|---|
| 12 AM | Overcast | 73° | 70° | 11% | 7 mph SSW | 48% | 0 | |
| 1 AM | Overcast | 73° | 69° | 12% | 9 mph SSW | 51% | 0 | |
| 2 AM | Thundery outbreaks in nearby | 72° | 68° | 12% | 9 mph SSW | 54% | 0 | |
| 3 AM | Thundery outbreaks in nearby | 72° | 68° | 13% | 8 mph SW | 56% | 0 | |
| 4 AM | Partly Cloudy | 73° | 70° | 7% | 7 mph SSW | 54% | 0 | |
| 5 AM | Overcast | 72° | 69° | 12% | 7 mph SSW | 54% | 0 | |
| 6 AM | Overcast | 73° | 70° | 11% | 7 mph SSW | 49% | 0 | |
| 7 AM | Overcast | 75° | 72° | 11% | 6 mph SSW | 45% | 5 | |
| 8 AM | Overcast | 78° | 76° | 10% | 4 mph SSW | 41% | 6 | |
| 9 AM | Overcast | 83° | 80° | 9% | 4 mph NNW | 32% | 6 | |
| 10 AM | Overcast | 89° | 84° | 9% | 7 mph N | 23% | 7 | |
| 11 AM | Sunny | 92° | 85° | 1% | 11 mph NE | 21% | 8 | |
| 12 PM | Partly Cloudy | 92° | 85° | 2% | 12 mph NE | 22% | 8 | |
| 1 PM | Sunny | 96° | 89° | 1% | 10 mph ENE | 18% | 9 | |
| 2 PM | Overcast | 90° | 83° | 9% | 14 mph NNE | 29% | 7 | |
| 3 PM | Cloudy | 87° | 81° | 6% | 12 mph NNE | 32% | 7 | |
| 4 PM | Sunny | 88° | 84° | 1% | 8 mph NNE | 30% | 8 | |
| 5 PM | Partly Cloudy | 90° | 85° | 3% | 10 mph NNE | 27% | 8 | |
| 6 PM | Cloudy | 88° | 84° | 7% | 8 mph NNE | 29% | 7 | |
| 7 PM | Partly Cloudy | 84° | 81° | 2% | 6 mph NE | 36% | 7 | |
| 8 PM | Partly Cloudy | 76° | 75° | 4% | 4 mph NE | 48% | 0 | |
| 9 PM | Overcast | 73° | 74° | 13% | 1 mph NW | 57% | 0 | |
| 10 PM | Overcast | 76° | 72° | 11% | 9 mph NNW | 45% | 0 | |
| 11 PM | Overcast | 75° | 74° | 11% | 4 mph W | 50% | 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 64°F (18°C) around 6 AM up to 86°F (30°C) near 3 PM - about 3°F (2°C) above the typical August high of 83°F (28°C).
A stray shower can't be ruled out - Rain chances top out at 17% around 4 PM. UV reaches 7 (1 PM) - sun protection recommended through midday.
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.