From central Iowa 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 Iowa ranked by our light-pollution model.
Core season
Mar–Sep
Best month
June
4.3 h window
Max core altitude
19°
above southern horizon
Dark locations
45
Bortle 1–3 (est.)
Milky Way core visibility in Iowa by month
| Month | Core visible (15th) | Hours | Max altitude | Direction |
|---|---|---|---|---|
| January | — | — | -3° | — |
| February | — | — | 10° | — |
| March | 4:53 AM – 5:43 AM | 0.8 | 15° | SSE → SSE |
| April | 2:45 AM – 4:45 AM | 2.0 | 19° | SE → S |
| May | 12:54 AM – 3:54 AM | 3.0 | 19° | SSE → S |
| June | 11:03 PM – 3:23 AM | 4.3 | 19° | SSE → SSW |
| July | 10:53 PM – 2:03 AM | 3.2 | 19° | S → SW |
| August | 10:02 PM – 12:02 AM | 2.0 | 18° | S → SW |
| September | 9:00 PM – 10:00 PM | 1.0 | 15° | SSW → SW |
| October | — | — | 10° | — |
| November | — | — | -1° | — |
| December | — | — | -19° | — |
Computed for central Iowa (41.99, -93.24) — 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 | 1:02 AM | Core below horizon at night |
| Tue, Dec 08, 2026 | 6:52 PM | Core below horizon at night |
| Thu, Jan 07, 2027 | 2:24 PM | Core below horizon at night |
| Sat, Feb 06, 2027 | 9:56 AM | Core below horizon at night |
| Mon, Mar 08, 2027 | 3:29 AM | Core season |
| Tue, Apr 06, 2027 | 6:51 PM | Core season |
| Thu, May 06, 2027 | 5:58 AM | Core season |
| Fri, Jun 04, 2027 | 2:40 PM | Core season |
| Sat, Jul 03, 2027 | 10:02 PM | Core season |
| Mon, Aug 02, 2027 | 5:05 AM | Core season |
| Tue, Aug 31, 2027 | 12:41 PM | Core season |
| Wed, Sep 29, 2027 | 9:36 PM | Core season |
| Fri, Oct 29, 2027 | 8:36 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 Iowa
| Location | Type | County | Est. Bortle | Zenith mag/arcsec² |
|---|---|---|---|---|
| Black Hawk State Park | State Park | Sac County | 2 | 21.80 |
| Lacey-Keosauqua State Park | State Park | Van Buren County | 2 | 21.80 |
| Chicken Ridge Scenic Overlook Park | Scenic Viewpoint | Clayton County | 2 | 21.76 |
| Hill Little Sioux Overlook | Scenic Viewpoint | O'Brien County | 2 | 21.80 |
| Backbone State Park | State Park | Delaware County | 2 | 21.70 |
| Lake Darling State Park | State Park | Jefferson County | 3 | 21.69 |
| Springbrook State Park | State Park | Guthrie County | 2 | 21.69 |
| Lake Anita State Park | State Park | Cass County | 2 | 21.73 |
| Murray Hill Overlook | Scenic Viewpoint | Harrison County | 3 | 21.66 |
| Geode State Park | State Park | Henry County | 3 | 21.62 |
| Waubonsie State Park | State Park | Fremont County | 3 | 21.56 |
| Cedar Rock State Park | State Park | Buchanan County | 3 | 21.53 |
| Bellevue State Park | State Park | Jackson County | 3 | 21.49 |
| Dolliver Memorial State Park | State Park | Webster County | 3 | 21.48 |
| Lewis and Clark State Park | State Park | Monona County | 3 | 21.50 |
| Pikes Peak State Park | State Park | Clayton County | 3 | 21.36 |
| Rock Creek State Park | State Park | Jasper County | 3 | 21.38 |
| Pilot Knob State Park | State Park | Winnebago County | 3 | 21.42 |
| Lake Keomah State Park | State Park | Mahaska County | 3 | 21.36 |
| Elk Rock State Park | State Park | Marion County | 3 | 21.30 |
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 Iowa?
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 Iowa?
Our darkest modeled locations include Black Hawk State Park, Lacey-Keosauqua State Park, Chicken Ridge Scenic Overlook Park, Hill Little Sioux 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.