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Rule Golden Hour

Mu Cang Chai - Golden Hour - Vietnam

Mù Cang Chải, Yên Bái Province, Vietnam

That magical warm light just after sunrise or before sunset

No opportunities right now
Here’s what usually blocks matches

No Golden Hour opportunities in the next 14 days

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Rule requirements (key thresholds)
Golden Hour · Any Golden Hour Potential · ≥ 80.0% Precipitation Chance · ≤ 5.0% Visibility · ≥ 1000.0m

Tip: Scroll down to the 72-hour table to see exactly which condition fails hour by hour.

Most common blockers (next 72 hours)
Precipitation Chance 100% failing
Golden Hour Potential 97% failing
Golden Hour 88% failing

Currently

Real-time conditions
Low Cloud Cover6%
Mid Cloud Cover61%
High Cloud Cover100%
Sun Elevation-26.2° (Astronomical night)

Upcoming Opportunities

When all conditions match, PhotoWeather marks an opportunity window.

Times shown in Asia/Bangkok

No opportunities in the next 10 days

See the blocker timeline below to understand which conditions are preventing matches.

What this forecast looks for

Plain-language explanation from the rule

This forecast identifies optimal golden hour conditions for Vietnam's diverse landscapes, from limestone karsts emerging from emerald waters to ancient trading ports lit by thousands of lanterns. We track cloud cover, visibility, and atmospheric conditions to predict when warm directional light enhances Vietnam's distinctive natural and cultural features.

Vietnam's geography—stretching over 1,000 miles from north to south—offers extraordinary variety. Northern limestone karsts at Ha Long Bay and Ninh Binh glow ethereally in early and late light, while central ancient towns like Hoi An come alive as sunset transitions to lantern-lit evening. Mountain landscapes at Sapa and Mu Cang Chai showcase terraced rice paddies that shift color dramatically through the seasons under golden light.

What makes Vietnam golden-hour photography distinctive:

  • Limestone karst magic - Ha Long Bay's 2,000 limestone islands and Ninh Binh's inland karsts appear to float when bathed in warm sunrise light
  • Rice terrace gradients - Sapa and Mu Cang Chai's cascading terraces glow golden during harvest season (September-October) or reflect sky colors when flooded (May-June)
  • Ancient town transitions - Hoi An's yellow buildings and lanterns create magical compositions as natural sunset light gives way to artificial illumination
  • Imperial architecture - Hue's citadel and royal tombs take on regal quality under warm directional light along the Perfume River

Ha Long Bay at sunrise provides Vietnam's iconic image—limestone karsts silhouetted against pastel skies with mirror-calm emerald waters, best December through February during dry season. Hoi An requires precise timing—arrive 30 minutes before sunset to capture yellow buildings in warm natural light, then stay as lanterns illuminate the Thu Bon River. Ninh Binh's karsts work magnificently at both sunrise and sunset, with flooded rice paddies providing reflections. At Sapa, golden hour during harvest season (late September-early October) transforms green terraces to gold.

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72-hour requirements breakdown

What passed or failed, hour by hour
0matching hours in the next 80 hours
AND logic: all conditions required
Meets requirement
Misses requirement
Time
Asia/Bangkok
Golden Hour
Any
Golden Hour Potential
≥ 80.0%
Precipitation Chance
≤ 5.0%
Visibility
≥ 1000.0m
Wed, Jul 8
11:0011%100%2005m
12:0014%100%5802m
13:0015%100%15298m
14:0017%81%14014m
15:0021%65%16790m
16:0021%49%14851m
17:0024%56%5443m
18:0052%64%7556m
19:0055%71%24134m
20:0024%72%24134m
21:0021%72%24135m
22:0023%73%24135m
23:0020%71%24135m
Thu, Jul 9
24:0020%70%18236m
01:0018%68%17220m
02:0021%73%11714m
03:0017%79%7388m
04:0014%84%2498m
05:0035%89%635m
06:0026%94%373m
07:0017%100%330m
08:0022%99%21623m
09:0021%98%20632m
10:0023%96%14170m
11:0022%97%14663m
12:0020%98%7216m
13:0014%99%5978m
14:0018%78%7037m
15:0023%58%7336m
16:0023%38%8574m
17:0026%40%16908m
18:0096%42%11261m
19:0093%44%15924m
20:0020%42%24134m
21:0016%40%21978m
22:0016%39%22544m
23:0016%40%23010m
Fri, Jul 10
24:0018%42%24135m
01:0018%44%11653m
02:0018%42%1822m
03:0012%40%653m
04:0012%39%358m
05:0032%54%392m
06:0020%69%403m
07:0018%84%362m
08:0018%77%489m
09:0015%71%357m
10:0018%64%514m
11:0016%66%1124m
12:0017%68%1291m
13:0015%70%5311m
14:0014%63%787m
15:0014%57%951m
16:0014%50%1475m
17:0015%42%2196m
18:0036%34%2186m
19:0040%26%2656m
20:0014%30%3522m
21:0012%34%1655m
22:0014%39%1141m
23:009%35%1324m
Sat, Jul 11
24:0014%31%3137m
01:0014%27%4393m
02:000%25%3013m
03:000%23%1633m
04:000%21%253m
05:0058%36%6966m
06:0021%50%13679m
07:000%65%20392m
08:000%73%21639m
09:000%82%22887m
10:000%90%24135m
11:000%92%24135m
12:000%93%24135m
13:000%95%24135m
14:000%79%24135m
15:000%64%24135m
16:000%48%24135m
17:000%49%22918m
18:0055%49%21701m
How to read: colored cells show whether each predicate requirement is met; highlighted rows mean the full rule matched (an opportunity).

What does Golden Hour Potential mean?

Inputs that drive the score

This derived score summarizes multiple raw weather signals. The table below shows the supporting inputs hour by hour, so you can see what's pushing the score up or down.

Time
Asia/Bangkok
Golden Hour
High Clouds
%
Low Clouds
%
Mid-Level Clouds
%
Relative Humidity
%
Solar Elevation
°
Total Cloud Coverage
%
Wind Speed
m/s
Wed, Jul 8 Sunrise 05:26 Sunset 18:50
21:00
- 100% 6% 61% 98% -26° 100% 0.51m/s
22:00
- 17% 8% 66% 98% -36° 66% 0.29m/s
23:00
- 40% 26% 71% 98% -43° 71% 0.32m/s
Thu, Jul 9 Sunrise 05:26 Sunset 18:50
24:00
- 26% 29% 89% 99% -46° 89% 0.48m/s
01:00
- 55% 34% 97% 99% -44° 97% 0.14m/s
02:00
- 76% 34% 75% 99% -38° 86% 0.17m/s
03:00
- 12% 40% 71% 99% -29° 71% 0.12m/s
04:00
- 57% 47% 52% 99% -18° 60% 0.25m/s
05:00
- 86% 62% 42% 100% -6.4° 86% 0.09m/s
06:00
- 12% 70% 85% 99% 6.4° 91% 0.06m/s
07:00
- 4% 54% 83% 98% 19° 84% 0.38m/s
08:00
- 2% 46% 96% 98% 33° 96% 0.91m/s
09:00
- 1% 44% 81% 97% 46° 81% 1.1m/s
10:00
- 4% 49% 8% 92% 60° 49% 1.5m/s
11:00
- 2% 47% 21% 83% 74° 47% 2m/s
12:00
- 1% 43% 7% 88% 88° 43% 1.8m/s
13:00
- 5% 54% 12% 92% 78° 54% 1.6m/s
14:00
- 6% 53% 63% 94% 64° 75% 1.6m/s
15:00
- 21% 31% 76% 97% 51° 76% 1.4m/s
16:00
- 68% 28% 88% 97% 37° 88% 1.1m/s
17:00
- 9% 25% 42% 96% 23° 42% 1m/s
18:00
- 20% 18% 21% 98% 10° 26% 0.92m/s
19:00
- 40% 22% 10% 99% -2.7° 40% 0.68m/s
20:00
- 54% 18% 16% 99% -15° 54% 0.5m/s
21:00
- 17% 25% 32% 99% -26° 38% 0.47m/s
22:00
- 57% 38% 34% 99% -36° 63% 0.41m/s
23:00
- 57% 48% 18% 99% -43° 58% 0.45m/s
Fri, Jul 10 Sunrise 05:27 Sunset 18:50
24:00
- 94% 56% 29% 99% -46° 94% 0.36m/s
01:00
- 100% 70% 21% 99% -44° 100% 0.14m/s
02:00
- 100% 84% 13% 99% -38° 100% 0.41m/s
03:00
- 97% 86% 33% 100% -29° 97% 0.26m/s
04:00
- 100% 90% 48% 100% -18° 100% 0.38m/s
05:00
- 100% 73% 56% 100% -6.5° 100% 0.54m/s
06:00
- 99% 77% 91% 100% 6.3° 99% 0.54m/s
07:00
- 95% 92% 77% 99% 19° 95% 0.76m/s
08:00
- 79% 96% 12% 99% 33° 96% 1.2m/s
09:00
- 93% 97% 38% 99% 46° 99% 1.1m/s
10:00
- 69% 98% 42% 98% 60° 98% 1m/s
11:00
- 28% 95% 35% 98% 74° 95% 0.98m/s
12:00
- 9% 90% 12% 93% 88° 90% 1.4m/s
13:00
- 29% 80% 5% 91% 78° 80% 1.5m/s
14:00
- 99% 70% 9% 91% 64° 99% 1.4m/s
15:00
- 98% 78% 51% 87% 51° 98% 1.8m/s
16:00
- 98% 87% 82% 90% 37° 98% 1.7m/s
17:00
- 100% 83% 92% 95% 23° 100% 1.3m/s
18:00
- 100% 69% 74% 97% 10° 100% 0.86m/s
19:00
- 100% 54% 13% 98% -2.7° 100% 0.24m/s
20:00
- 100% 35% 7% 98% -15° 100% 0.31m/s
21:00
- 100% 35% 23% 99% -26° 100% 0.27m/s
22:00
- 84% 40% 19% 99% -36° 84% 0.07m/s
23:00
- 100% 46% 5% 99% -43° 100% 0.22m/s
Sat, Jul 11 Sunrise 05:27 Sunset 18:50
24:00
- 100% 56% 5% 99% -46° 100% 0.14m/s
01:00
- 100% 76% 39% 98% -44° 100% 0.19m/s
02:00
- 67% 81% 28% 96% -38° 97% 0.72m/s
03:00
- 34% 87% 16% 94% -29° 95% 1.2m/s
04:00
- 0% 92% 5% 92% -19° 92% 1.8m/s
05:00
- 0% 79% 5% 88% -6.6° 79% 2m/s
06:00
- 0% 66% 5% 84% 6.2° 66% 2.2m/s
07:00
- 0% 53% 5% 80% 19° 53% 2.4m/s
08:00
- 2% 49% 4% 78% 33° 49% 2.4m/s
09:00
- 3% 45% 4% 76% 46° 45% 2.4m/s
10:00
- 4% 42% 3% 75% 60° 42% 2.4m/s
11:00
- 11% 31% 5% 82% 74° 35% 2m/s
12:00
- 17% 20% 6% 88% 88° 29% 1.7m/s
13:00
- 23% 9% 8% 95% 78° 23% 1.4m/s
14:00
- 49% 11% 10% 96% 64° 49% 1.2m/s
15:00
- 74% 13% 11% 96% 51° 74% 1.1m/s
16:00
- 100% 15% 13% 97% 37° 100% 0.92m/s
17:00
- 96% 31% 27% 97% 23° 96% 1m/s
18:00
- 92% 47% 40% 97% 10° 93% 1.1m/s
19:00
- 88% 63% 54% 97% -2.7° 89% 1.2m/s
20:00
- 69% 64% 54% 97% -15° 84% 1.3m/s
How to read: these inputs help produce the derived score; they are not requirements by themselves.

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