North Region Arizona forecast zone
State: Arizona
Score: 91 (Great)
Best window: Thursday 10:00 PM-12:00 AM MST (from latest forecast run)
Main factor: Darkness, low moon, and low cloud risk
Event details
Milky Way Shoulder Season (Fall)
Milky Way core season means the bright galactic core is returning to useful night windows.
When to look: Window: 2026-09-01 to 2026-11-15 (peak 2026-10-01). Use clear windows aligned with event timing and local constraints.
Where visible: US south/west favored
How to watch: Naked-eye viewing needs dark skies; a tripod camera shows much more structure.
What can ruin visibility
Check these before travel
Moonlight, haze, clouds, and light pollution can erase contrast.
- Check moon risk
- Choose dark-sky areas
- Use the best time window
- Open local Milky Way timing
Event timing and verification
Authoritative date plus local-condition handoff
Calendar status: Sep 1-Nov 15 | Peak Oct 1
Calendar policy: Past event windows are removed from current and upcoming lists.
Forecast dataset: 2026-07-24
Use this event page for the sky-window baseline, then use the map or tonight forecast for clouds, moonlight, darkness, and the best local viewing window.
Best dark-sky starting points
Prioritize darkness, low moon interference, and low clouds
North Region Colorado forecast zone
State: Colorado
Score: 91 (Great)
Best window: Friday 12:00 AM-3:00 AM MDT
Main factor: Darkness, low moon, and low cloud risk
North Region Vermont forecast zone
State: Vermont
Score: 91 (Great)
Best window: Friday 12:00 AM-3:00 AM EDT
Main factor: Darkness, low moon, and low cloud risk
North Region Alaska forecast zone
State: Alaska
Score: 90 (Great)
Best window: Friday 8:00 PM-11:00 PM AKDT
Main factor: Darkness, low moon, and low cloud risk
Choose dark skies and low moon interference
Simple field check
For Milky Way viewing, a lower cloud score can still fail if the site is bright or moonlit. Start with dark-sky candidates, then confirm moonlight and cloud timing.
Best results usually come in dark, moon-low windows after astronomical twilight.
Recheck local sky conditions before long travel, especially if the event depends on a short viewing window.