Weather Forecast for Custer
South Dakota, United States of America
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Current Weather - Custer: 21°C
Current Weather - Custer: 21°C
South Dakota, United States of America
Clear
Feels like 21°C
Wind
6 km/h W
Humidity
57%
Pressure
1021 mb
UV Index
0
Visibility
16 km
Sunny
Saturday, July 25, 2026
High
37°C
Low
23°C
Rain Chance
36%
Hourly Forecast
37°C
37°C
37°C
37°C
37°C
36°C
34°C
30°C
26°C
26°C
26°C
Day Statistics
Maximum Wind
18 km/h
Humidity
26%
Precipitation
0 mm
UV Index
10
Visibility
10 km
Rain Chance
36%
Snow Chance
0%
Sun & Moon
Sunrise
05:36 AM
Sunset
08:25 PM
Moonrise
06:29 PM
Moonset
01:47 AM
Moon Phase
Waxing Gibbous
Moon Illumination
90%
Air Quality
PM2.5
7
μg/m³
PM10
7.8
μg/m³
NO₂
2.7
μg/m³
O₃
84.1
μg/m³
SO₂
0.4
μg/m³
CO
106.5
μg/m³
Sunny
Sunday, July 26, 2026
High
37°C
Low
24°C
Rain Chance
1%
Hourly Forecast
26°C
24°C
24°C
24°C
24°C
24°C
24°C
25°C
28°C
31°C
33°C
35°C
36°C
37°C
36°C
35°C
35°C
34°C
34°C
32°C
30°C
28°C
27°C
26°C
Day Statistics
Maximum Wind
20 km/h
Humidity
29%
Precipitation
0 mm
UV Index
11
Visibility
10 km
Rain Chance
1%
Snow Chance
0%
Sun & Moon
Sunrise
05:37 AM
Sunset
08:24 PM
Moonrise
07:15 PM
Moonset
02:40 AM
Moon Phase
Waxing Gibbous
Moon Illumination
95%
Air Quality
PM2.5
4
μg/m³
PM10
5
μg/m³
NO₂
2
μg/m³
O₃
87
μg/m³
SO₂
0.3
μg/m³
CO
99.8
μg/m³
Sunny
Monday, July 27, 2026
High
37°C
Low
19°C
Rain Chance
57%
Hourly Forecast
26°C
26°C
25°C
25°C
24°C
24°C
24°C
26°C
30°C
32°C
33°C
34°C
35°C
36°C
37°C
37°C
37°C
37°C
19°C
21°C
22°C
22°C
24°C
23°C
Day Statistics
Maximum Wind
19 km/h
Humidity
31%
Precipitation
2 mm
UV Index
10
Visibility
10 km
Rain Chance
57%
Snow Chance
0%
Sun & Moon
Sunrise
05:38 AM
Sunset
08:23 PM
Moonrise
07:53 PM
Moonset
03:39 AM
Moon Phase
Full Moon
Moon Illumination
99%
Air Quality
PM2.5
4.3
μg/m³
PM10
5.2
μg/m³
NO₂
2.1
μg/m³
O₃
86.6
μg/m³
SO₂
0.4
μg/m³
CO
98.3
μg/m³
Sunny
Tuesday, July 28, 2026
High
33°C
Low
21°C
Rain Chance
57%
Hourly Forecast
22°C
22°C
21°C
23°C
22°C
21°C
21°C
23°C
27°C
29°C
31°C
32°C
33°C
33°C
29°C
27°C
22°C
23°C
26°C
28°C
26°C
23°C
24°C
24°C
Day Statistics
Maximum Wind
16 km/h
Humidity
47%
Precipitation
2 mm
UV Index
10
Visibility
10 km
Rain Chance
57%
Snow Chance
0%
Sun & Moon
Sunrise
05:39 AM
Sunset
08:22 PM
Moonrise
08:23 PM
Moonset
04:42 AM
Moon Phase
Full Moon
Moon Illumination
100%
Air Quality
PM2.5
4.3
μg/m³
PM10
5.2
μg/m³
NO₂
2.4
μg/m³
O₃
92.2
μg/m³
SO₂
0.4
μg/m³
CO
105.3
μg/m³
Sunny
Wednesday, July 29, 2026
High
36°C
Low
20°C
Rain Chance
1%
Hourly Forecast
20°C
22°C
22°C
20°C
22°C
22°C
21°C
24°C
28°C
29°C
32°C
33°C
33°C
34°C
35°C
36°C
36°C
36°C
36°C
33°C
30°C
27°C
27°C
26°C
Day Statistics
Maximum Wind
19 km/h
Humidity
33%
Precipitation
0 mm
UV Index
9
Visibility
10 km
Rain Chance
1%
Snow Chance
0%
Sun & Moon
Sunrise
05:40 AM
Sunset
08:21 PM
Moonrise
08:47 PM
Moonset
05:47 AM
Moon Phase
Full Moon
Moon Illumination
99%
Air Quality
PM2.5
4.3
μg/m³
PM10
5.2
μg/m³
NO₂
5
μg/m³
O₃
79.4
μg/m³
SO₂
0.3
μg/m³
CO
126.6
μg/m³
Sunny
Thursday, July 30, 2026
High
38°C
Low
24°C
Rain Chance
1%
Hourly Forecast
25°C
25°C
25°C
25°C
25°C
25°C
26°C
29°C
31°C
34°C
35°C
37°C
38°C
37°C
36°C
35°C
35°C
34°C
34°C
32°C
29°C
26°C
25°C
24°C
Day Statistics
Maximum Wind
19 km/h
Humidity
21%
Precipitation
0 mm
UV Index
9
Visibility
10 km
Rain Chance
1%
Snow Chance
0%
Sun & Moon
Sunrise
05:41 AM
Sunset
08:20 PM
Moonrise
09:08 PM
Moonset
06:52 AM
Moon Phase
Waning Gibbous
Moon Illumination
96%
Sunny
Friday, July 31, 2026
High
31°C
Low
20°C
Rain Chance
1%
Hourly Forecast
23°C
22°C
21°C
20°C
20°C
20°C
20°C
22°C
25°C
28°C
29°C
29°C
30°C
30°C
31°C
31°C
31°C
31°C
30°C
28°C
26°C
23°C
22°C
21°C
Day Statistics
Maximum Wind
20 km/h
Humidity
31%
Precipitation
0 mm
UV Index
8
Visibility
10 km
Rain Chance
1%
Snow Chance
0%
Sun & Moon
Sunrise
05:42 AM
Sunset
08:19 PM
Moonrise
09:26 PM
Moonset
07:56 AM
Moon Phase
Waning Gibbous
Moon Illumination
91%
Weather Alerts
Red Flag Warning issued July 24 at 9:42PM MDT until July 26 at 12:00AM MDT by NWS Rapid City SD
...RED FLAG WARNING REMAINS IN EFFECT FROM NOON SATURDAY TO MIDNIGHT MDT SATURDAY NIGHT DUE TO DRY LIGHTNING FOR NORTHERN BLACK HILLS, CENTRAL BLACK HILLS, SOUTHERN BLACK HILLS, FALL RIVER COUNTY AREA, NORTHERN FOOT HILLS, EASTERN FOOT HILLS, CUSTER COUNTY PLAINS, PINE RIDGE AREA, BUTTE COUNTY AREA, PERKINS COUNTY, WEST CENTRAL PLAINS, ZIEBACH COUNTY, HAAKON COUNTY AREA, BADLANDS AREA, BENNETT COUNTY AREA, NORTHERN CAMPBELL, SOUTHERN CAMPBELL, CROOK COUNTY PLAINS, WESTON COUNTY PLAINS, AND WYOMING BLACK HILLS... .Thunderstorms expected to develop across northeastern Wyoming into western South Dakota Saturday afternoon and evening. These storms are expected to be high based and produce frequent lightning with little to no rainfall as they move through. The dry storm risk combined with very hot temperatures in the upper 90s to 100s, very low humidities of 15 to 20 percent, and dry fuels, critical fire weather conditions are expected tomorrow afternoon and evening. * AFFECTED AREA...Fire Weather Zones 314, 315, 316, 317, 318, 319, 320, 321, 322, 323, 324, 325, 326, 327, 328, 329, 330, 331, 332, and 333. * TIMING...From noon Saturday to midnight MDT Saturday Night. * LIGHTNING...Frequent dry lightning is possible with thunderstorms. * OUTFLOW WINDS...Gusty and erratic winds are possible in and near any thunderstorms. * THUNDERSTORMS...Thunderstorms with little to no rain, gusty and erratic winds, and frequent lightning are possible. * IMPACTS...Any fires that develop will spread rapidly. Outdoor burning is not recommended.
A Red Flag Warning means that critical fire weather conditions are expected. A combination of gusty winds, low relative humidity, and dry lightning can contribute to extreme fire behavior.
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