Rapid City, SD Hourly Forecast

South Dakota, United States 🇺🇸
81°
Partly cloudy Feels like 87°
Updated 6 hours ago

Rapid City temperature trend - Next 24 hours

72° 8 PM 8 PM - 72°F (22°C), Sunny, 5% precip 9 PM - 72°F (22°C), Clear, 8% precip 10 PM - 72°F (22°C), Clear, 8% precip 72° 11 PM 11 PM - 72°F (22°C), Clear, 9% precip 12 AM - 71°F (22°C), Clear, 11% precip 1 AM - 71°F (22°C), Clear, 10% precip 70° 2 AM 2 AM - 70°F (21°C), Clear, 9% precip 3 AM - 70°F (21°C), Clear, 10% precip 4 AM - 70°F (21°C), Clear, 10% precip 69° 5 AM 5 AM - 69°F (21°C), Clear, 11% precip 6 AM - 69°F (20°C), Sunny, 11% precip 7 AM - 69°F (21°C), Sunny, 5% precip 74° 8 AM 8 AM - 74°F (23°C), Partly Cloudy 9 AM - 77°F (25°C), Partly Cloudy 10 AM - 79°F (26°C), Partly Cloudy 82° 11 AM 11 AM - 82°F (28°C), Partly Cloudy 12 PM - 86°F (30°C), Partly Cloudy 1 PM - 86°F (30°C), Partly Cloudy 85° 2 PM 2 PM - 85°F (30°C), Overcast, 8% precip 3 PM - 84°F (29°C), Partly Cloudy 4 PM - 83°F (28°C), Sunny 84° 5 PM 5 PM - 84°F (29°C), Sunny 6 PM - 84°F (29°C), Sunny 7 PM - 82°F (28°C), Patchy rain nearby, 8% precip

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.

TimeConditionsTemp FeelsRainWind HumidityUV
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.

TimeConditionsTemp FeelsRainWind HumidityUV
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.

TimeConditionsTemp FeelsRainWind HumidityUV
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?
1 PM is forecast to be the warmest, at about 86°F (30°C) with partly cloudy.
Will it rain in Rapid City tonight?
Unlikely - the evening precipitation chance stays at or below 9%.
When is the UV index highest in Rapid City today?
Around 12 PM, when it reaches 4. 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 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.

Hourly forecasts nearby