Weather Forecast for Rapid City
South Dakota, United States of America
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Current Weather - Rapid City: 21°C
Current Weather - Rapid City: 21°C
South Dakota, United States of America
Sunny
Feels like 21°C
Wind
30 km/h SSE
Humidity
26%
Pressure
1016 mb
UV Index
7
Visibility
16 km
Sunny
Wednesday, May 13, 2026
High
32°C
Low
9°C
Rain Chance
0%
Hourly Forecast
30°C
28°C
26°C
24°C
24°C
Day Statistics
Maximum Wind
38 km/h
Humidity
27%
Precipitation
0 mm
UV Index
8
Visibility
10 km
Rain Chance
0%
Snow Chance
0%
Sun & Moon
Sunrise
05:29 AM
Sunset
08:10 PM
Moonrise
03:28 AM
Moonset
04:40 PM
Moon Phase
Waning Crescent
Moon Illumination
19%
Air Quality
PM2.5
5
μg/m³
PM10
6.2
μg/m³
NO₂
4
μg/m³
O₃
98.1
μg/m³
SO₂
1.3
μg/m³
CO
149.8
μg/m³
Sunny
Thursday, May 14, 2026
High
27°C
Low
12°C
Rain Chance
0%
Hourly Forecast
23°C
23°C
23°C
22°C
20°C
18°C
18°C
18°C
19°C
20°C
21°C
23°C
24°C
26°C
27°C
27°C
27°C
26°C
25°C
21°C
18°C
15°C
14°C
13°C
Day Statistics
Maximum Wind
33 km/h
Humidity
23%
Precipitation
0 mm
UV Index
6
Visibility
10 km
Rain Chance
0%
Snow Chance
0%
Sun & Moon
Sunrise
05:28 AM
Sunset
08:12 PM
Moonrise
03:50 AM
Moonset
06:00 PM
Moon Phase
Waning Crescent
Moon Illumination
11%
Air Quality
PM2.5
3.1
μg/m³
PM10
4.2
μg/m³
NO₂
2.1
μg/m³
O₃
117.1
μg/m³
SO₂
1.5
μg/m³
CO
134
μg/m³
Sunny
Friday, May 15, 2026
High
26°C
Low
9°C
Rain Chance
0%
Hourly Forecast
12°C
12°C
11°C
10°C
10°C
10°C
12°C
15°C
17°C
19°C
21°C
22°C
24°C
25°C
25°C
25°C
24°C
23°C
22°C
20°C
18°C
15°C
13°C
12°C
Day Statistics
Maximum Wind
31 km/h
Humidity
21%
Precipitation
0 mm
UV Index
0
Visibility
10 km
Rain Chance
0%
Snow Chance
0%
Sun & Moon
Sunrise
05:27 AM
Sunset
08:13 PM
Moonrise
04:15 AM
Moonset
07:23 PM
Moon Phase
Waning Crescent
Moon Illumination
5%
Air Quality
PM2.5
3.7
μg/m³
PM10
5.1
μg/m³
NO₂
3.7
μg/m³
O₃
100.3
μg/m³
SO₂
2.4
μg/m³
CO
142.5
μg/m³
Sunny
Saturday, May 16, 2026
High
25°C
Low
8°C
Rain Chance
0%
Hourly Forecast
10°C
10°C
9°C
9°C
8°C
8°C
10°C
12°C
14°C
16°C
18°C
19°C
20°C
21°C
23°C
24°C
24°C
24°C
23°C
22°C
19°C
17°C
15°C
13°C
Day Statistics
Maximum Wind
31 km/h
Humidity
29%
Precipitation
0 mm
UV Index
5
Visibility
10 km
Rain Chance
0%
Snow Chance
0%
Sun & Moon
Sunrise
05:26 AM
Sunset
08:14 PM
Moonrise
04:48 AM
Moonset
08:48 PM
Moon Phase
New Moon
Moon Illumination
1%
Air Quality
PM2.5
4.2
μg/m³
PM10
5.6
μg/m³
NO₂
3
μg/m³
O₃
102.2
μg/m³
SO₂
2.1
μg/m³
CO
142.4
μg/m³
Sunny
Sunday, May 17, 2026
High
19°C
Low
8°C
Rain Chance
0%
Hourly Forecast
12°C
11°C
10°C
10°C
9°C
9°C
10°C
11°C
12°C
13°C
14°C
16°C
17°C
17°C
18°C
18°C
18°C
18°C
17°C
15°C
13°C
12°C
10°C
9°C
Day Statistics
Maximum Wind
41 km/h
Humidity
48%
Precipitation
0 mm
UV Index
4
Visibility
10 km
Rain Chance
0%
Snow Chance
0%
Sun & Moon
Sunrise
05:25 AM
Sunset
08:15 PM
Moonrise
05:31 AM
Moonset
10:08 PM
Moon Phase
Waxing Crescent
Moon Illumination
0%
Air Quality
PM2.5
5.1
μg/m³
PM10
7.6
μg/m³
NO₂
1.9
μg/m³
O₃
114
μg/m³
SO₂
1.9
μg/m³
CO
139.9
μg/m³
Patchy rain nearby
Monday, May 18, 2026
High
14°C
Low
5°C
Rain Chance
72%
Hourly Forecast
8°C
7°C
6°C
6°C
5°C
5°C
5°C
5°C
5°C
6°C
7°C
8°C
9°C
11°C
12°C
13°C
13°C
14°C
13°C
11°C
8°C
7°C
6°C
5°C
Day Statistics
Maximum Wind
31 km/h
Humidity
52%
Precipitation
1 mm
UV Index
2
Visibility
9 km
Rain Chance
72%
Snow Chance
0%
Sun & Moon
Sunrise
05:24 AM
Sunset
08:16 PM
Moonrise
06:27 AM
Moonset
11:17 PM
Moon Phase
Waxing Crescent
Moon Illumination
2%
Patchy rain nearby
Tuesday, May 19, 2026
High
15°C
Low
2°C
Rain Chance
83%
Hourly Forecast
4°C
4°C
3°C
3°C
3°C
4°C
5°C
7°C
9°C
11°C
13°C
14°C
14°C
14°C
14°C
13°C
12°C
11°C
10°C
9°C
9°C
8°C
8°C
8°C
Day Statistics
Maximum Wind
26 km/h
Humidity
52%
Precipitation
2 mm
UV Index
2
Visibility
10 km
Rain Chance
83%
Snow Chance
0%
Sun & Moon
Sunrise
05:23 AM
Sunset
08:17 PM
Moonrise
07:37 AM
Moonset
No moonset
Moon Phase
Waxing Crescent
Moon Illumination
7%
Solar Radiation Data
Shortwave Radiation
491.52
Diffuse Radiation
53.9
DNI
820.44
GTI
331.95
Weather Alerts
Red Flag Warning issued May 12 at 10:18PM MDT until May 14 at 9:00PM MDT by NWS Rapid City SD
...RED FLAG WARNING REMAINS IN EFFECT FROM NOON WEDNESDAY TO 9 PM MDT THURSDAY DUE TO GUSTY WINDS AND LOW RELATIVE HUMIDITY FOR FALL RIVER COUNTY AREA, NORTHERN FOOT HILLS, EASTERN FOOT HILLS, CUSTER COUNTY PLAINS, PINE RIDGE AREA, BUTTE COUNTY AREA, WEST CENTRAL PLAINS, ZIEBACH COUNTY, HAAKON COUNTY AREA, BADLANDS AREA, AND BENNETT COUNTY AREA... .Warm, very dry, and breezy weather will support critical fire weather conditions over much of the western SD Plains Wednesday. Expect southeast winds of 15 to 25 mph with gusts over 35 mph, with RH as low as 10 percent. A trough will move through the area early Thursday morning, with winds shifting northwest and increasing. After poor recovery, RH's will fall to the teens or lower again on Thursday afternoon with gusty northwest winds. * AFFECTED AREA...Fire Weather Zones 322, 323, 324, 325, 326, 327, 329, 330, 331, 332, and 333. * TIMING...From noon Wednesday to 9 PM MDT Thursday. * WINDS...Southeast winds 20 to 30 mph with gusts up to 40 mph. * RELATIVE HUMIDITY...Relative Humidity as low as 10 percent. * IMPACTS...Any fires that develop will spread rapidly. Outdoor burning is not recommended.
A Red Flag Warning means that critical fire weather conditions are either occurring now, or will shortly. A combination of strong winds, low relative humidity, and warm temperatures can contribute to extreme fire behavior.
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