From central Pennsylvania 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 Pennsylvania ranked by our light-pollution model.
Core season
Mar–Sep
Best month
June
4.7 h window
Max core altitude
21°
above southern horizon
Dark locations
151
Bortle 1–3 (est.)
Milky Way core visibility in Pennsylvania by month
| Month | Core visible (15th) | Hours | Max altitude | Direction |
|---|---|---|---|---|
| January | — | — | -2° | — |
| February | 5:24 AM – 5:24 AM | 0.0 | 11° | SE → SE |
| March | 4:35 AM – 5:45 AM | 1.2 | 17° | SE → SSE |
| April | 2:34 AM – 4:44 AM | 2.2 | 20° | SE → S |
| May | 12:29 AM – 3:49 AM | 3.3 | 21° | SE → S |
| June | 10:45 PM – 3:25 AM | 4.7 | 21° | SSE → SSW |
| July | 10:36 PM – 2:06 AM | 3.5 | 21° | S → SW |
| August | 9:49 PM – 11:59 PM | 2.2 | 20° | S → SW |
| September | 8:51 PM – 10:01 PM | 1.2 | 17° | SSW → SW |
| October | 7:59 PM – 7:59 PM | 0.0 | 11° | SW → SW |
| November | — | — | -1° | — |
| December | — | — | -19° | — |
Computed for central Pennsylvania (40.55, -76.72) — 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 | 2:02 AM | Core below horizon at night |
| Tue, Dec 08, 2026 | 7:52 PM | Core below horizon at night |
| Thu, Jan 07, 2027 | 3:24 PM | Core below horizon at night |
| Sat, Feb 06, 2027 | 10:56 AM | Core below horizon at night |
| Mon, Mar 08, 2027 | 4:29 AM | Core season |
| Tue, Apr 06, 2027 | 7:51 PM | Core season |
| Thu, May 06, 2027 | 6:58 AM | Core season |
| Fri, Jun 04, 2027 | 3:40 PM | Core season |
| Sat, Jul 03, 2027 | 11:02 PM | Core season |
| Mon, Aug 02, 2027 | 6:05 AM | Core season |
| Tue, Aug 31, 2027 | 1:41 PM | Core season |
| Wed, Sep 29, 2027 | 10:36 PM | Core season |
| Fri, Oct 29, 2027 | 9:36 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 Pennsylvania
| Location | Type | County | Est. Bortle | Zenith mag/arcsec² |
|---|---|---|---|---|
| Cherry Springs State Park | Dark Sky Place | Potter County | 2 | 21.77 |
| Lyman Run State Park | State Park | Potter County | 2 | 21.76 |
| Ole Bull State Park | State Park | Potter County | 2 | 21.76 |
| Patterson State Park | State Park | Potter County | 2 | 21.77 |
| Prouty Place State Park | State Park | Potter County | 2 | 21.77 |
| Denton Hill State Park | State Park | Potter County | 2 | 21.76 |
| Sinnemahoning State Park | State Park | Cameron County | 2 | 21.75 |
| Sizerville State Park | State Park | Cameron County | 2 | 21.75 |
| Colton Point State Park | State Park | Tioga County | 2 | 21.72 |
| Leonard Harrison State Park | State Park | Tioga County | 2 | 21.71 |
| Kettle Creek State Park | State Park | Clinton County | 2 | 21.74 |
| Kinzua Bridge State Park | State Park | McKean County | 3 | 21.69 |
| Bucktail State Park Natural Area | State Park | Cameron County | 2 | 21.74 |
| Hyner Run State Park | State Park | Clinton County | 2 | 21.69 |
| Hyner View State Park | State Park | Clinton County | 3 | 21.67 |
| Upper Pine Bottom State Park | State Park | Lycoming County | 3 | 21.57 |
| Parker Dam State Park | State Park | Clearfield County | 3 | 21.60 |
| Little Pine State Park | State Park | Lycoming County | 3 | 21.58 |
| Clear Creek State Park | State Park | Forest County | 3 | 21.62 |
| Cook Forest State Park | State Park | Jefferson County | 3 | 21.61 |
Sky brightness is modeled from nearby town populations (Walker's law); terrain, altitude and local lighting can make real skies better or worse.
Certified dark sky places in Pennsylvania
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 Pennsylvania?
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 Pennsylvania?
Our darkest modeled locations include Cherry Springs State Park, Lyman Run State Park, Ole Bull State Park, Patterson State Park.
What time is the Milky Way visible tonight?
Use the Milky Way planner with your location for exact rise, transit and dark-window times.