Located in Corson County, South Dakota, Hump Butte is a rock formation. The nearest town is Lemmon, about 56 km (35 mi) away (Hump Butte lies E of town).
Hump Butte is a summit in South Dakota, in the United States. With an elevation of 2,431 feet (741 m), Hump Butte is the 453rd highest summit in the state of South Dakota. Hump Butte was so named on account of its outline being in the shape of buffalo's hump.From the Wikipedia article “Hump Butte”, licensed under CC BY-SA 4.0.
Sunrise & sunset directions
At Hump Butte the sunrise point swings a long way through the year: about 54° (NE) at the June solstice and 124° (SE) in late December. Sunset moves from 306° (NW) in June to 236° (WSW) in December, and the midday sun climbs to 68° in summer but only 21° in winter.
| Date | Sunrise | Azimuth | Sunset | Azimuth | Noon sun | Daylight |
|---|---|---|---|---|---|---|
| March equinox (Mar 20) | 6:50 AM | 90° E | 6:58 PM | 271° W | 44° | 12h 09m |
| June solstice (Jun 21) | 4:56 AM | 54° NE | 8:40 PM | 306° NW | 68° | 15h 44m |
| September equinox (Sep 22) | 6:33 AM | 89° E | 6:45 PM | 271° W | 44° | 12h 12m |
| December solstice (Dec 21) | 7:25 AM | 124° SE | 4:04 PM | 236° WSW | 21° | 8h 39m |
Azimuth is measured clockwise from true north (90° = east, 270° = west). Computed for 2026; values change by less than a degree from year to year.
Golden hour & blue hour by month
Rock towers and buttes glow red and orange in the first and last half-hour of sun; midday light flattens their shape.
| Month (15th) | Blue hour starts | Sunrise | Golden hour ends | Golden hour starts | Sunset | Blue hour ends | Daylight |
|---|---|---|---|---|---|---|---|
| January | 6:51 AM | 7:24 AM | 8:12 AM | 3:40 PM | 4:28 PM | 5:01 PM | 9h 04m |
| February | 6:19 AM | 6:49 AM | 7:31 AM | 4:30 PM | 5:12 PM | 5:43 PM | 10h 23m |
| March | 6:30 AM | 6:59 AM | 7:39 AM | 6:12 PM | 6:52 PM | 7:21 PM | 11h 52m |
| April | 5:29 AM | 6:00 AM | 6:40 AM | 6:52 PM | 7:32 PM | 8:04 PM | 13h 32m |
| May | 4:40 AM | 5:15 AM | 5:58 AM | 7:28 PM | 8:11 PM | 8:46 PM | 14h 56m |
| June | 4:17 AM | 4:56 AM | 5:42 AM | 7:52 PM | 8:39 PM | 9:17 PM | 15h 43m |
| July | 4:34 AM | 5:11 AM | 5:56 AM | 7:49 PM | 8:34 PM | 9:11 PM | 15h 23m |
| August | 5:14 AM | 5:46 AM | 6:28 AM | 7:15 PM | 7:56 PM | 8:29 PM | 14h 10m |
| September | 5:55 AM | 6:25 AM | 7:04 AM | 6:20 PM | 6:59 PM | 7:29 PM | 12h 34m |
| October | 6:33 AM | 7:03 AM | 7:44 AM | 5:21 PM | 6:01 PM | 6:31 PM | 10h 58m |
| November | 6:14 AM | 6:47 AM | 7:32 AM | 3:30 PM | 4:16 PM | 4:48 PM | 9h 29m |
| December | 6:47 AM | 7:21 AM | 8:11 AM | 3:12 PM | 4:02 PM | 4:37 PM | 8h 41m |
Local time (America/Denver), including daylight saving time. Golden hour runs from about −4° to +6° solar altitude, so the morning golden hour begins during blue hour, before sunrise.
Milky Way & night sky
From Hump Butte, the Milky Way core is visible in a dark sky from April through August. June gives the longest window (about 2.8 hours on a moonless night), and the core peaks around 15° above the southern horizon. Our light-pollution model puts the sky at about Bortle 1 (excellent dark-sky site), which is excellent for astrophotography.
| Month | Core visible (15th) | Hours | Max altitude | Direction |
|---|---|---|---|---|
| January | Below 10° in darkness | — | -5° | — |
| February | Below 10° in darkness | — | 6° | — |
| March | 5:02 AM – 5:12 AM | 0.2 | 11° | SSE → SSE |
| April | 2:53 AM – 4:03 AM | 1.2 | 14° | SSE → SSE |
| May | 12:55 AM – 2:55 AM | 2.0 | 15° | SSE → S |
| June | 11:21 PM – 2:11 AM | 2.8 | 15° | SSE → SSW |
| July | 11:02 PM – 12:52 AM | 1.8 | 15° | S → SSW |
| August | 9:55 PM – 10:55 PM | 1.0 | 14° | SSW → SSW |
| September | 8:42 PM – 8:52 PM | 0.2 | 11° | SSW → SSW |
| October | Below 10° in darkness | — | 6° | — |
| November | Below 10° in darkness | — | -3° | — |
| December | Below 10° in darkness | — | -20° | — |
Window when the galactic core is at least 10° high during astronomical darkness on the 15th of each month. Pick nights within a few days of the new moon. Plan exact nights with the Milky Way planner.
Estimated sky darkness: 1 Bortle 1 — Excellent dark-sky site. The Milky Way casts faint shadows; zodiacal light and airglow are obvious. Modeled zenith brightness ≈ 21.94 mag/arcsec². Aurora needs roughly Kp 4.5+ to show low on the northern horizon here.
Weather & best season
Long-term NASA satellite data for this area show July as the clearest month (about 42% average cloud cover) and December as the cloudiest (66%). July is the warmest month and January the coldest, which matters for gear, snow access and how long batteries last at night.
Average cloud cover (%)
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| High °F | 57 | 69 | 81 | 90 | 99 | 111 | 113 | 108 | 104 | 93 | 74 | 56 |
| Low °F | -25 | -17 | -20 | 7 | 24 | 36 | 48 | 46 | 32 | 2 | -1 | -19 |
| Precip. (in) | 0.4 | 0.6 | 0.8 | 1.7 | 3.0 | 3.0 | 2.5 | 2.2 | 1.7 | 1.4 | 0.5 | 0.5 |
Monthly climatology for the surrounding 1° grid cell from NASA POWER (MERRA-2). Mountain sites can be colder and cloudier than the cell average.
Photography tips for this rock formation
- Find a spot where the formation sits against open sky to emphasize its silhouette.
- At night, a formation under the Milky Way or star trails makes a strong anchor.
- Use the sunrise and sunset azimuths below to know which face will be lit.
- Stay on trails; desert soils and lichens take decades to recover from footprints.
- Check road and trail conditions with the managing agency before you go.
Season: Spring and autumn are best in desert regions; winter snow on red rock is rare but spectacular.
Suggested gear: Wide and telephoto lenses, Tripod, Headlamp. Work out exposures with the depth of field, ND filter and NPF rule calculators.
FAQ
When is the best time to photograph Hump Butte?
What time is golden hour at Hump Butte?
Where does the sun rise and set at Hump Butte?
Can you see the Milky Way from Hump Butte?
Do you need a permit to photograph at Hump Butte?
How far is Hump Butte from Lemmon?
Sources
Location data: Wikidata, Wikipedia. Sun, moon and Milky Way times are computed by LWPhoto Atlas for 2026. Climate: NASA POWER. Sky darkness is a population-based estimate (Walker's law), not a measurement. See data sources & licenses.