Custer, SD Monthly Weather

Custer County10:40 PM MDT43.77°N, 103.60°WElevation 5,315 ft
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October 2026

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Mon
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153°/43°Avg 62°/43°
267°/42°Avg 61°/42°
368°/47°Avg 60°/42°
471°/45°Avg 60°/42°
582°/63°Avg 60°/41°
680°/61°Avg 59°/41°
775°/56°Avg 58°/40°
870°/54°Avg 58°/40°
981°/58°Avg 58°/39°
1079°/56°Avg 57°/39°
1156°/43°0.23 inAvg 57°/38°
1253°/35°Avg 56°/38°
1344°/33°0.31 inAvg 56°/38°
1445°/38°0.18 inAvg 55°/37°
1548°/33°0.16 inAvg 55°/37°
1653°/29°Avg 55°/36°
1774°/53°Avg 54°/36°
1863°/43°Avg 54°/36°
19Avg 54°/35°
20 Sunny 69°/41°Avg 53°/35°
21 Sunny 63°/45°Avg 53°/35°
22 Mostly Sunny 69°/50°Avg 52°/34°
23 Partly Sunny 67°/39°Avg 52°/34°
24 Mostly Sunny 52°/31°Avg 52°/34°
25 Sunny 56°/34°Avg 52°/34°
26 Sunny 56°/–Avg 51°/33°
27 Partly cloudy 64°/37°Avg 51°/33°
28 Partly cloudy 68°/44°Avg 51°/33°
29Avg 50°/32°
30Avg 50°/32°
31Avg 50°/32°
Average high65° (normal 58°)
Average low46° (normal 39°)
Warmest / coldest82° / 29°
Precipitation0.88 in (normal 1.16 in to date)
Record high today79° (1974)
Record low today17° (2020)

Observed: Mount Rushmore National Memorial, 17 km away, records since 1962. Normals 1991–2020. Climate data from NOAA's Regional Climate Centers (ACIS); recent days are preliminary. Days ahead: the forecast.

Forecasts, observations and alerts in the United States come from the National Weather Service (NOAA); radar from NOAA's Multi-Radar Multi-Sensor system; satellite imagery from NASA's Global Imagery Browse Services (GIBS) and NOAA's GOES satellites; the map from the U.S. Geological Survey's National Map; air quality from AirNow (EPA and its partners); hurricane information from the National Hurricane Center; climate normals and records from NOAA's Regional Climate Centers (ACIS). Forecasts outside the United States and the UV index: MET Norway (CC BY 4.0); observations outside the U.S.: airport reports via NOAA's Aviation Weather Center. Place names: GeoNames (CC BY 4.0). Data are copied on a schedule and may lag the sources; for warnings that affect your safety, follow your local National Weather Service office and emergency officials. Weather news is drawn from the 4Search index and reflects what the press published. Terms of use.