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Rule Dark Skies

Milky Way Forecast - US Southwest

American Southwest, United States

Dark sky forecast for the American Southwest. Track Milky Way conditions at Monument Valley, Death Valley, and Utah's national parks.

This forecast tracks the conditions every astrophotographer needs: clear, moonless nights with exceptional atmospheric transparency. We combine cloud cover predictions with moon phase, lunar position, and visibility data to identify your best Milky Way shooting opportunities.

The American Southwest offers some of the darkest skies in the developed world. Many of these locations hold International Dark Sky Park designations, meaning active protection of their exceptional night sky quality.

What makes the Southwest special for astrophotography:

  • Exceptional darkness - Death Valley and Big Bend rank among the darkest places in North America
  • Dry climate - Low humidity means better atmospheric transparency and seeing conditions
  • Iconic foregrounds - Arches, hoodoos, mesas, and desert landscapes create unforgettable compositions
  • Altitude advantage - Many locations sit above 5,000 feet, reducing atmospheric interference

The Milky Way core is best visible from March through October in the Northern Hemisphere. For the most dramatic shots, plan around new moon phases and arrive well before astronomical twilight ends. Summer months offer the Milky Way core high overhead, while spring and fall provide lower-angle views perfect for wide landscape compositions.

Best bet right now
Big Bend
Terlingua, Texas, United States
High confidence
Window ends in ~1h

Location status

5 of 10 locations currently active

Monument Valley

Inactive

Iconic Navajo buttes silhouetted against the Milky Way

Oljato-Monument Valley, Utah, United States

Right now: Moon too bright (61%, max 25%)

Next opportunity in ~11h

47 opportunities in next 14 days

View forecast

Bryce Canyon

Active

Hoodoos and Dark Sky Park certification

Bryce, Arizona, United States

Ends in ~1h

38 opportunities in next 14 days

View forecast

Arches

Inactive

Delicate Arch astrophotography destination

Moab, Utah, United States

Right now: Moon too bright (61%, max 25%)

Next opportunity in ~11h

48 opportunities in next 14 days

View forecast

Grand Canyon

Inactive

North Rim offers pristine dark skies

Grand Canyon, Arizona, United States

Right now: Moon too bright (61%, max 25%)

Next opportunity in ~11h

38 opportunities in next 14 days

View forecast

Death Valley

Active

Darkest skies in the Lower 48 states

Furnace Creek, California, United States

Ends in ~1h

27 opportunities in next 14 days

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Joshua Tree

Active

Desert dark sky preserve with iconic trees

Twentynine Palms, California, United States

Ends in ~1h

26 opportunities in next 14 days

View forecast

White Sands

Inactive

White dunes reflecting starlight

Alamogordo, New Mexico, United States

Right now: Moon too bright (61%, max 25%)

Next opportunity in ~11h

38 opportunities in next 14 days

View forecast

Sedona

Inactive

Red rocks and dark sky community

Sedona, Arizona, United States

Right now: Moon too bright (61%, max 25%)

Next opportunity in ~11h

32 opportunities in next 14 days

View forecast

Capitol Reef

Active

Remote Utah park with exceptional darkness

Torrey, Utah, United States

Ends in ~1h

45 opportunities in next 14 days

View forecast

Big Bend

Active

Texas dark sky preserve on the Rio Grande

Terlingua, Texas, United States

Ends in ~0h

27 opportunities in next 14 days

View forecast

Upcoming Opportunities

When all conditions match, PhotoWeather marks an opportunity window.

Times shown in America/Denver
Next opportunity
Dark Skies
Death Valley
Today · 11:00–01:00 · 14h window
Medium confidence
67%
Dark Skies
Joshua Tree
Today · 20:00–01:00
Medium
Dark Skies
Capitol Reef
Today · 21:00–01:00
Medium
Dark Skies
Big Bend
Today · 22:00–24:00
High
Dark Skies
Bryce Canyon
Today · 22:00–01:00
Medium
Dark Skies
Sedona
Tomorrow · 11:00–16:00
Medium
+44 more windows in the next 14 days

What's blocking opportunities

72-hour view of conditions preventing matches across 10 locations

Top 4 blocking conditions across 10 of 10 locations
Some blocked
Most blocked
8 Thu
9 Fri
10 Sat
11 Sun
24
06
12
18
24
06
12
18
24
06
12
18
Moon Illumination (≤ 35.0%)
92% blocked
Moon Altitude (≤ 10.0°)
40% blocked
Total Cloud Coverage (≤ 20.0%)
18% blocked
Precipitation Chance (≤ 10.0%)
2% blocked
How to read: Each row shows when a condition blocks opportunities. Stronger red means more locations are affected. These are the top 4 conditions preventing matches across the 72-hour forecast.

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