From central South Dakota the Milky Way's galactic core is visible in true darkness from March to September, with the longest viewing window in June. Below: monthly times, the next new moons, and the darkest photo locations in South Dakota ranked by our light-pollution model.
Core season
Mar–Sep
Best month
June
3.7 h window
Max core altitude
17°
above southern horizon
Dark locations
62
Bortle 1–3 (est.)
Milky Way core visibility in South Dakota by month
| Month | Core visible (15th) | Hours | Max altitude | Direction |
|---|---|---|---|---|
| January | — | — | -4° | — |
| February | — | — | 8° | — |
| March | 4:46 AM – 5:26 AM | 0.7 | 14° | SSE → SSE |
| April | 2:42 AM – 4:22 AM | 1.7 | 17° | SSE → S |
| May | 12:47 AM – 3:17 AM | 2.5 | 17° | SSE → S |
| June | 11:03 PM – 2:43 AM | 3.7 | 17° | SSE → SSW |
| July | 10:49 PM – 1:19 AM | 2.5 | 17° | S → SSW |
| August | 9:51 PM – 11:21 PM | 1.5 | 16° | S → SSW |
| September | 8:44 PM – 9:24 PM | 0.7 | 13° | SSW → SSW |
| October | — | — | 8° | — |
| November | — | — | -2° | — |
| December | — | — | -20° | — |
Computed for central South Dakota (43.95, -103.34) — core at least 10° high during astronomical darkness. Northern parts of the state see it lower and for less time.
Next new moons (darkest nights)
| Date | Time | Milky Way |
|---|---|---|
| Mon, Nov 09, 2026 | 12:02 AM | Core below horizon at night |
| Tue, Dec 08, 2026 | 5:52 PM | Core below horizon at night |
| Thu, Jan 07, 2027 | 1:24 PM | Core below horizon at night |
| Sat, Feb 06, 2027 | 8:56 AM | Core below horizon at night |
| Mon, Mar 08, 2027 | 2:29 AM | Core season |
| Tue, Apr 06, 2027 | 5:51 PM | Core season |
| Thu, May 06, 2027 | 4:58 AM | Core season |
| Fri, Jun 04, 2027 | 1:40 PM | Core season |
| Sat, Jul 03, 2027 | 9:02 PM | Core season |
| Mon, Aug 02, 2027 | 4:05 AM | Core season |
| Tue, Aug 31, 2027 | 11:41 AM | Core season |
| Wed, Sep 29, 2027 | 8:36 PM | Core season |
| Fri, Oct 29, 2027 | 7:36 AM | Core below horizon at night |
New moon times from the U.S. Naval Observatory, converted to local time. The 3–4 nights either side are also dark in the evening or morning.
Darkest photo locations in South Dakota
| Location | Type | County | Est. Bortle | Zenith mag/arcsec² |
|---|---|---|---|---|
| Ancient Hunters Overlook | Scenic Viewpoint | Pennington County | 1 | 21.93 |
| Badlands Wilderness Overlook | Scenic Viewpoint | Pennington County | 1 | 21.93 |
| Big Badlands Overlook | Scenic Viewpoint | Jackson County | 1 | 21.94 |
| Bigfoot Pass Overlook | Scenic Viewpoint | Jackson County | 1 | 21.94 |
| Burns Basin Overlook | Scenic Viewpoint | Pennington County | 1 | 21.93 |
| Conata Basin Overlook | Scenic Viewpoint | Pennington County | 1 | 21.93 |
| Lookout Point | Scenic Viewpoint | Custer County | 2 | 21.87 |
| Rousseau Recreation and Overlook Area | Scenic Viewpoint | Hughes County | 2 | 21.89 |
| Custer State Park | State Park | Custer County | 2 | 21.84 |
| Oakwood Lakes State Park | State Park | Brookings County | 2 | 21.78 |
| Norbeck Memorial Overlook | Scenic Viewpoint | Pennington County | 2 | 21.75 |
| Borglum View Terrace | Scenic Viewpoint | Pennington County | 2 | 21.74 |
| Norbeck Memorial Overlook Recreation Site | Scenic Viewpoint | Custer County | 2 | 21.74 |
| Spirit Mound Historic Prairie | State Park | Clay County | 3 | 21.58 |
| Hartford Beach State Park | State Park | Brookings County | 3 | 21.61 |
| Overlook Recreation Area | Scenic Viewpoint | Hughes County | 3 | 21.58 |
| Big Stone Lake | Lake | Roberts County | 1 | 21.89 |
| Black Hills National Forest | National Forest | Pennington County | 2 | 21.85 |
| Ardmore | Ghost Town | Fall River County | 1 | 21.93 |
| Manchester | Ghost Town | Kingsbury County | 1 | 21.90 |
Sky brightness is modeled from nearby town populations (Walker's law); terrain, altitude and local lighting can make real skies better or worse.
Starting exposure for sharp stars (NPF rule)
| Sensor | Lens | Aperture | NPF max shutter | 500 rule |
|---|---|---|---|---|
| Full frame (35 mm) | 14 mm | f/2.8 | 19.6 s | 36 s |
| Full frame (35 mm) | 20 mm | f/2.8 | 13.8 s | 25 s |
| Full frame (35 mm) | 24 mm | f/2.8 | 11.5 s | 21 s |
| APS-C (Nikon, Sony, Fujifilm, Pentax) | 14 mm | f/2.8 | 15.4 s | 23 s |
| APS-C (Nikon, Sony, Fujifilm, Pentax) | 20 mm | f/2.8 | 10.8 s | 16 s |
| APS-C (Nikon, Sony, Fujifilm, Pentax) | 24 mm | f/2.8 | 9.0 s | 14 s |
| Micro Four Thirds | 14 mm | f/2.8 | 14.1 s | 18 s |
| Micro Four Thirds | 20 mm | f/2.8 | 9.8 s | 12 s |
| Micro Four Thirds | 24 mm | f/2.8 | 8.2 s | 10 s |
NPF = (35 × f-number + 30 × pixel pitch) ÷ focal length, using typical pixel pitch per format (24 MP FF, 24–26 MP APS-C, 20 MP MFT). Fine-tune for your camera with the NPF calculator.
Tips for Milky Way photography
- Shoot within a few days of the new moon, or after moonset / before moonrise.
- Use ISO 3200–6400 on modern full-frame sensors, f/1.8–f/2.8, and the NPF shutter time.
- Focus manually on a bright star with live view magnified, then lock the focus ring.
- Shoot a blue-hour or low-ISO foreground frame from the same tripod position and blend it later.
- Stack 10–20 frames to reduce noise, or use a star tracker for longer exposures.
- Check the darkest-location table above, then confirm the view to the south on the location's sun-path diagram.
FAQ
When is Milky Way season in South Dakota?
From about March to September the core is above the horizon during darkness; June gives the longest window.
Where is the best place to see the Milky Way in South Dakota?
Our darkest modeled locations include Ancient Hunters Overlook, Badlands Wilderness Overlook, Big Badlands Overlook, Bigfoot Pass Overlook.
What time is the Milky Way visible tonight?
Use the Milky Way planner with your location for exact rise, transit and dark-window times.