Rapid City, SD Hourly Forecast

South Dakota, United States 🇺🇸
80°
Partly Cloudy Feels like 75°
Updated 1 hour ago

Rapid City temperature trend - Next 24 hours

80° 12 PM 12 PM - 80°F (27°C), Partly Cloudy 1 PM - 82°F (28°C), Overcast, 9% precip 2 PM - 85°F (30°C), Sunny 86° 3 PM 3 PM - 86°F (30°C), Overcast, 8% precip 4 PM - 83°F (28°C), Patchy rain nearby, 17% precip 5 PM - 83°F (28°C), Patchy rain nearby, 8% precip 82° 6 PM 6 PM - 82°F (28°C), Sunny 7 PM - 78°F (26°C), Sunny 8 PM - 73°F (23°C), Clear 71° 9 PM 9 PM - 71°F (22°C), Clear 10 PM - 69°F (21°C), Clear 11 PM - 69°F (21°C), Clear 67° 12 AM 12 AM - 67°F (20°C), Clear 1 AM - 67°F (19°C), Clear 2 AM - 66°F (19°C), Clear 65° 3 AM 3 AM - 65°F (18°C), Clear 4 AM - 65°F (18°C), Clear 5 AM - 64°F (18°C), Clear 64° 6 AM 6 AM - 64°F (18°C), Clear, 5% precip 7 AM - 66°F (19°C), Sunny 8 AM - 71°F (22°C), Sunny 74° 9 AM 9 AM - 74°F (23°C), Partly Cloudy, 6% precip 10 AM - 77°F (25°C), Sunny 11 AM - 81°F (27°C), Sunny

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.

TimeConditionsTemp FeelsRainWind HumidityUV
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.

TimeConditionsTemp FeelsRainWind HumidityUV
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.

TimeConditionsTemp FeelsRainWind HumidityUV
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?
3 PM is forecast to be the warmest, at about 86°F (30°C) with overcast.
Will it rain in Rapid City tonight?
Unlikely - the evening precipitation chance stays at or below 1%.
When is the UV index highest in Rapid City today?
Around 1 PM, when it reaches 7. From UV 3 upward, sun protection is recommended.

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.

Hourly forecasts nearby