Season and Timing
When Is
Milky Way Season?
One of the most common questions I get is some version of: "I just went outside and I couldn't see the Milky Way. What am I doing wrong?" In many cases, the answer is simply timing. The galactic core, which is the bright, colorful center of the Milky Way that appears in most photos, is not visible from the Northern Hemisphere year round. And even when it is visible, it's only above the horizon for certain hours each night.
Understanding the seasonal arc is the foundation of planning any Milky Way shoot.
Why the core disappears in winter
The galactic core sits in the direction of Sagittarius, near the center of our galaxy. From the Northern Hemisphere, that part of the sky is below the horizon during winter months. As Earth orbits the sun through the year, the geometry shifts, and by late February or early March, the core begins rising before astronomical dawn. By midsummer, it's well positioned in the south for several hours each night. By October, it's setting in the west and disappearing again for the winter.
Data above is approximate for mid-latitude Northern Hemisphere locations (35 to 45 degrees north). Southern Hemisphere viewers have essentially the opposite window and generally better peak altitudes since the galactic core is more directly overhead.
Peak altitude matters as much as visibility
Visibility is necessary but not sufficient. The galactic core can be technically above the horizon but so low that it's useless, buried in horizon haze, light pollution glow, or simply too dim to photograph well at that angle. The app considers the core visible only when it's above 10 degrees altitude, which is a practical minimum for photography in most conditions.
Peak altitude varies significantly by latitude. At 35 degrees north (roughly Los Angeles or Albuquerque), the core reaches about 35 degrees at peak in July. At 45 degrees north (roughly Portland or Minneapolis), that drops to about 25 degrees. At 50 degrees north (much of Canada and Northern Europe), peak altitude is around 15 to 18 degrees, which is workable but requires a clear, flat horizon and very dark skies to photograph effectively.
The further south you are in the Northern Hemisphere, the higher the core rises and the longer your window. This is why the American Southwest produces a disproportionate share of Milky Way photography.
Month by month: what to expect
March and April are pre-dawn months. The core rises a few hours before sunrise and sets with the morning twilight. Shooting windows of 1 to 2 hours are typical, and you'll need to be set up well before midnight. These months are great for blue-hour shots that blend the rising core with early morning twilight.
May is the transition month. By mid-May, the core is rising before midnight at most US latitudes, and the window starts to feel manageable without needing to stay out until 3 or 4 AM. The core is still relatively low, but May new moon windows are excellent for getting your first shots of the year.
June, July, and August are peak season. The core is well positioned from late evening through the early hours of the morning. Windows of 4 to 5 hours are typical in the Southwest. This is when the galactic core reaches its highest altitudes and the shooting conditions are most forgiving.
September is still productive but the window is shrinking. The core sets earlier each night, and by late September many Northern latitudes are down to a 2-hour window. September is often a good month for autumn foregrounds like aspens or early snow combined with the last weeks of the season.
October is the end of the season for most latitudes. The window is short, the core is low, and it sets before midnight by mid-month. There's still a brief window in early October, but it requires perfect conditions to make it worthwhile.
How the app handles all of this
Milky Way Tonight computes all of this for your specific location and date automatically. You don't need to remember which months work or estimate rise and set times. Enter your location and the app tells you whether tonight has a window, when it opens and closes, and what the peak altitude will be.
In the app: The Visibility Calendar shows every night of the year color-coded by window quality. You can see the full season arc in the annual view, which makes it easy to plan around moon cycles months in advance. The best shooting nights appear in green and cluster around new moons during the June through September peak window.
- The core is above 10 degrees altitude during astronomical darkness
- Moon illumination is below your configured threshold (default 25%)
- The combination of darkness and window length is rated excellent, good, brief, or blocked
All three conditions have to line up. Understanding the seasonal context helps you know when to look for those alignments and when to wait for next month.