Weather Forecast for Rapid City
South Dakota, United States of America
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Current Weather - Rapid City: 18°C
Current Weather - Rapid City: 18°C
South Dakota, United States of America
Partly cloudy
Feels like 18°C
Wind
19 km/h WSW
Humidity
26%
Pressure
1001 mb
UV Index
2
Visibility
16 km
Patchy rain nearby
Thursday, April 16, 2026
High
23°C
Low
5°C
Rain Chance
75%
Hourly Forecast
18°C
14°C
11°C
8°C
6°C
5°C
Day Statistics
Maximum Wind
41 km/h
Humidity
42%
Precipitation
0 mm
UV Index
1
Visibility
10 km
Rain Chance
75%
Snow Chance
0%
Sun & Moon
Sunrise
06:07 AM
Sunset
07:39 PM
Moonrise
05:27 AM
Moonset
07:09 PM
Moon Phase
Waning Crescent
Moon Illumination
3%
Air Quality
PM2.5
5
μg/m³
PM10
8.4
μg/m³
NO₂
3.1
μg/m³
O₃
97.7
μg/m³
SO₂
1.3
μg/m³
CO
147.6
μg/m³
Patchy rain nearby
Friday, April 17, 2026
High
7°C
Low
-3°C
Rain Chance
72%
Hourly Forecast
3°C
2°C
1°C
1°C
0°C
-1°C
-1°C
-0°C
0°C
1°C
2°C
3°C
4°C
5°C
6°C
6°C
6°C
6°C
5°C
4°C
2°C
1°C
-1°C
-2°C
Day Statistics
Maximum Wind
42 km/h
Humidity
64%
Precipitation
3 mm
UV Index
1
Visibility
8 km
Rain Chance
72%
Snow Chance
6%
Sun & Moon
Sunrise
06:06 AM
Sunset
07:40 PM
Moonrise
05:51 AM
Moonset
08:30 PM
Moon Phase
New Moon
Moon Illumination
0%
Air Quality
PM2.5
2.2
μg/m³
PM10
2.8
μg/m³
NO₂
1.7
μg/m³
O₃
89.2
μg/m³
SO₂
1
μg/m³
CO
152.8
μg/m³
Sunny
Saturday, April 18, 2026
High
9°C
Low
-3°C
Rain Chance
0%
Hourly Forecast
-3°C
-3°C
-3°C
-3°C
-3°C
-3°C
-3°C
-1°C
1°C
2°C
4°C
5°C
6°C
7°C
8°C
8°C
9°C
9°C
9°C
8°C
6°C
5°C
2°C
2°C
Day Statistics
Maximum Wind
36 km/h
Humidity
47%
Precipitation
0 mm
UV Index
1
Visibility
10 km
Rain Chance
0%
Snow Chance
0%
Sun & Moon
Sunrise
06:04 AM
Sunset
07:41 PM
Moonrise
06:19 AM
Moonset
09:55 PM
Moon Phase
Waxing Crescent
Moon Illumination
1%
Air Quality
PM2.5
3.6
μg/m³
PM10
4.9
μg/m³
NO₂
2.6
μg/m³
O₃
92.7
μg/m³
SO₂
1.4
μg/m³
CO
154.9
μg/m³
Sunny
Sunday, April 19, 2026
High
19°C
Low
0°C
Rain Chance
0%
Hourly Forecast
2°C
2°C
2°C
1°C
1°C
1°C
0°C
3°C
6°C
9°C
12°C
15°C
17°C
18°C
18°C
19°C
19°C
19°C
17°C
13°C
10°C
8°C
6°C
6°C
Day Statistics
Maximum Wind
20 km/h
Humidity
39%
Precipitation
0 mm
UV Index
2
Visibility
10 km
Rain Chance
0%
Snow Chance
0%
Sun & Moon
Sunrise
06:03 AM
Sunset
07:42 PM
Moonrise
06:56 AM
Moonset
11:17 PM
Moon Phase
Waxing Crescent
Moon Illumination
3%
Air Quality
PM2.5
4.3
μg/m³
PM10
7.5
μg/m³
NO₂
4.3
μg/m³
O₃
92.7
μg/m³
SO₂
1.3
μg/m³
CO
161.8
μg/m³
Sunny
Monday, April 20, 2026
High
25°C
Low
4°C
Rain Chance
0%
Hourly Forecast
5°C
5°C
4°C
4°C
4°C
4°C
6°C
10°C
14°C
17°C
20°C
21°C
23°C
24°C
24°C
25°C
24°C
23°C
22°C
19°C
17°C
15°C
14°C
13°C
Day Statistics
Maximum Wind
32 km/h
Humidity
28%
Precipitation
0 mm
UV Index
0
Visibility
10 km
Rain Chance
0%
Snow Chance
0%
Sun & Moon
Sunrise
06:01 AM
Sunset
07:44 PM
Moonrise
07:43 AM
Moonset
No moonset
Moon Phase
Waxing Crescent
Moon Illumination
9%
Air Quality
PM2.5
4.1
μg/m³
PM10
6.7
μg/m³
NO₂
4.2
μg/m³
O₃
90.8
μg/m³
SO₂
1.3
μg/m³
CO
158.3
μg/m³
Partly Cloudy
Tuesday, April 21, 2026
High
26°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
13°C
15°C
17°C
19°C
21°C
23°C
24°C
25°C
25°C
25°C
23°C
21°C
18°C
16°C
15°C
14°C
Day Statistics
Maximum Wind
24 km/h
Humidity
33%
Precipitation
0 mm
UV Index
5
Visibility
10 km
Rain Chance
0%
Snow Chance
0%
Sun & Moon
Sunrise
05:59 AM
Sunset
07:45 PM
Moonrise
08:43 AM
Moonset
12:30 AM
Moon Phase
Waxing Crescent
Moon Illumination
17%
Sunny
Wednesday, April 22, 2026
High
30°C
Low
12°C
Rain Chance
0%
Hourly Forecast
13°C
13°C
13°C
12°C
12°C
12°C
14°C
16°C
20°C
22°C
24°C
26°C
27°C
28°C
29°C
29°C
29°C
29°C
27°C
24°C
20°C
18°C
17°C
16°C
Day Statistics
Maximum Wind
23 km/h
Humidity
24%
Precipitation
0 mm
UV Index
6
Visibility
10 km
Rain Chance
0%
Snow Chance
0%
Sun & Moon
Sunrise
05:58 AM
Sunset
07:46 PM
Moonrise
09:55 AM
Moonset
01:31 AM
Moon Phase
Waxing Crescent
Moon Illumination
27%
Solar Radiation Data
Shortwave Radiation
140.7
Diffuse Radiation
68.15
DNI
119.38
GTI
86.41
Weather Alerts
Red Flag Warning issued April 16 at 3:59AM MDT until April 16 at 7:00PM MDT by NWS Rapid City SD
...CRITICAL FIRE WEATHER CONDITIONS POSSIBLE THURSDAY ACROSS PORTIONS OF NORTHEASTERN WYOMING AND SOUTHWESTERN INTO SOUTH CENTRAL SOUTH DAKOTA... .Very warm (70s and 80s) and dry (humidities as low as 13 percent) conditions today. Southwest winds will increase through the day with gusts to 40 mph. The combination of warm, dry, and windy conditions ahead of a cold front will result in critical fire weather conditions this afternoon and evening. * AFFECTED AREA...Fire Weather Zones 317 Weston County Plains, 321 Southern Black Hills, 322 Fall River County Area, 325 Custer County Plains, 326 Pine Ridge Area, 332 Badlands Area, 333 Bennett County Area, 334 Mellette and Todd Counties and 335 Tripp County. * WINDS...West 15 to 25 mph with gusts up to 40 mph. * RELATIVE HUMIDITY...As low as 13 percent. * IMPACTS...The combination of gusty winds and low relative humidity would produce critical fire weather conditions.
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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