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Rule Moonlight

Big Bend - Moonlight - US Southwest

Terlingua, Texas, United States

Bright moon illuminating nighttime landscapes

Upcoming Opportunities

When all conditions match, PhotoWeather marks an opportunity window.

Times shown in America/Denver
Next opportunity
Good Moonlight (high) at Sunset
Big Bend
Fri, Apr 24 · 19:00–20:00 · 1h window
Medium confidence
54%
🌕Moon Illumination64.1%
☁️Total Cloud Coverage0%
clear-night weather icon
Good Moonlight (high)
Big Bend
Fri, Apr 24 · 20:00–01:00
🌕Moon Illumination:64.1%
Low

What this forecast looks for

Plain-language explanation from the rule

This forecast tracks exceptional moonlight photography conditions across the American Southwest. We combine moon phase, lunar elevation, cloud cover, and atmospheric transparency to predict when desert landscapes will glow under full moon illumination.

The Southwest's combination of dark skies, high desert elevation, and dry air creates moonlight conditions rivaling anywhere on Earth. Many Southwest locations hold Bortle Class 1 dark sky ratings, meaning moonlight illuminates the landscape without light pollution competition. The region's iconic rock formations take on otherworldly character under lunar illumination.

What makes the Southwest special for moonlight photography:

  • Bortle 1 darkness - Among the darkest skies in North America mean brilliant moonlight contrast
  • Iconic silhouettes - Monument Valley's buttes, Delicate Arch, and canyon country create dramatic moonlit compositions
  • High elevation advantage - Many locations above 5,000 feet mean moonlight passes through less atmosphere
  • Dry desert air - Low humidity provides exceptional clarity for moonlit landscapes

Monument Valley's sandstone buttes become ghostly sentinels under full moon, casting long shadows across the desert floor. Delicate Arch near Moab offers one of photography's most iconic moonrise opportunities. The vast canyon country provides endless opportunities for silhouetted rock formations against moonlit skies. Even under full moon, the Milky Way remains visible at these dark locations—particularly from high-elevation spots like Bryce Canyon at 8,000 feet. Plan moonrise timing carefully for compositions that capture both lunar illumination and twilight color.

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72-hour requirements breakdown

What passed or failed, hour by hour
0matching hours in the next 92 hours
AND logic: all conditions required
Meets requirement
Misses requirement
Time
America/Denver
Day/Night Period
Night
Moon Altitude
≥ 15.0°
Moon Illumination
≥ 60.0%
Total Cloud Coverage
≤ 40.0%
Visibility
≥ 8000.0m
Precipitation Chance
≤ 15.0%
Tue, Apr 14
22:00-59°5.3%100%24135m0%
23:00-61°5.3%100%24135m0%
Wed, Apr 15
24:00-58°5.3%100%24135m0%
01:00-50°5.3%100%24134m0%
02:00-39°5.3%100%24135m0%
03:00-27°5.3%100%24135m0%
04:00-15°5.3%100%24135m0%
05:00-1.8°5.3%100%24135m0%
06:0011°5.3%35%24134m0%
07:0024°5.3%69%24134m0%
08:0036°5.3%17%24135m0%
09:0047°5.3%5.9%24134m0%
10:0057°5.3%5%24135m0%
11:0063°5.3%2.6%24135m0%
12:0062°5.3%3.3%24134m0%
13:0056°5.3%0.9%24134m3.3%
14:0046°5.3%5.2%24135m6.7%
15:0034°5.3%58%24134m10%
16:0022°5.3%6.4%24135m6.7%
17:009.4°5.3%0%24134m3.3%
18:00-3.1°1.4%39%24134m0%
19:00-15°1.4%92%24134m0%
20:00-27°1.4%95%24134m0%
21:00-38°1.4%58%24135m0%
22:00-47°1.4%96%24135m0%
23:00-53°1.4%100%24135m0%
Thu, Apr 16
24:00-54°1.4%73%24135m0%
01:00-50°1.4%100%24135m0%
02:00-42°1.4%68%24134m0%
03:00-32°1.4%0%24134m0%
04:00-21°1.4%0%24134m0%
05:00-8.5°1.4%0%24134m0%
06:001.4%0%24135m0%
07:0017°1.4%0%24134m0%
08:0030°1.4%0%24135m0%
09:0042°1.4%0%24134m0%
10:0054°1.4%0%24134m0%
11:0064°1.4%6.4%24135m0%
12:0070°1.4%25%24135m0%
13:0068°1.4%1%24135m0%
14:0059°1.4%0.9%24135m0%
15:0048°1.4%19%24135m0%
16:0035°1.4%0%24135m0%
17:0023°1.4%0.6%24134m0%
18:0010°0%4.5%24134m0%
19:00-1.8°0%52%24134m6.7%
20:00-14°0%5.8%24135m13%
21:00-25°0%31%24135m20%
22:00-35°0%21%24134m13%
23:00-43°0%9.6%24135m6.7%
Fri, Apr 17
24:00-47°0%87%24134m0%
01:00-47°0%29%24134m0%
02:00-43°0%2.3%24135m0%
03:00-36°0%5%24134m0%
04:00-26°0%2.4%24134m0%
05:00-15°0%5%24135m0%
06:00-3.3°0%2.4%24135m0%
07:000%0%24134m0%
08:0022°0%40%24135m0%
09:0034°0%11%24135m0%
10:0047°0%10%24135m0%
11:0059°0%87%24134m0%
12:0070°0%88%24135m0%
13:0077°0%100%24134m0%
14:0072°0%100%24135m0%
15:0061°0%100%24134m0%
16:0049°0%100%24134m0%
17:0037°0%100%24134m0%
18:0024°1.4%100%24135m0%
19:0012°1.4%100%24134m0%
20:000.05°1.4%100%24134m0%
21:00-11°1.4%100%24134m0%
22:00-22°1.4%100%24135m7.4%
23:00-31°1.4%100%24135m15%
Sat, Apr 18
24:00-38°1.4%100%24135m22%
01:00-41°1.4%67%24135m28%
02:00-41°1.4%33%24135m33%
03:00-37°1.4%0%24135m39%
04:00-30°1.4%1.7%24135m33%
05:00-21°1.4%3.3%24135m28%
06:00-11°1.4%5%24135m22%
07:000.72°1.4%37%24135m15%
08:0013°1.4%68%24135m7.4%
09:0025°1.4%100%24135m0%
10:0038°1.4%100%24135m0%
11:0050°1.4%99%24135m0%
12:0063°1.4%99%24135m0%
13:0075°1.4%99%24135m0%
14:0082°1.4%100%24135m0%
15:0075°1.4%100%24135m0%
16:0063°1.4%100%24135m0%
17:0051°1.4%100%24135m0%
How to read: colored cells show whether each predicate requirement is met; highlighted rows mean the full rule matched (an opportunity).

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