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Rule Morning Frost

Miyajima - Morning Frost - Japan

Miyajima, Hiroshima, Japan

Frost crystals on calm, cold mornings near sunrise

No opportunities right now
Here’s what usually blocks matches

No Morning Frost opportunities in the next 14 days

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Rule requirements (key thresholds)
Time Window · Sunrise -45m to +90m Frost Probability · ≥ 60.0% Wind Speed · ≤ 1.5m/s

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

Most common blockers (next 72 hours)
Time Window 100% failing
Frost Probability 100% failing
Wind Speed 61% failing

Currently

Real-time conditions
Frost Probability
0%
Soil Temperature19.2°C
Dew Point12.4°C (moderate dew point)
Wind Speed1.7m/s (calm conditions)
Cloud Cover9%

Upcoming Opportunities

When all conditions match, PhotoWeather marks an opportunity window.

Times shown in Asia/Tokyo

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

Japan's winter transforms its iconic landscapes into scenes of serene beauty that embody the aesthetic principle of wabi-sabi—finding beauty in impermanence and imperfection. This forecast tracks frost and freezing conditions across Japan's diverse winter photography destinations.

Winter photography opportunities across Japan:

  • Kyoto's snow-covered temples - Kinkaku-ji golden pavilion and Fushimi Inari shrine gates become ethereal under fresh snow
  • Hokkaido's frozen landscapes - The Blue Pond in Biei develops stunning ice patterns and frost-covered trees create otherworldly scenes
  • Mountain shrines - Nikko's ornate Toshogu shrine complex gains dramatic contrast under winter snow
  • Historic streets - Takayama's preserved Edo-period town appears suspended in time with frost-laden roofs
  • Ice formations - Mountain shrines and waterfalls develop intricate ice sculptures

The season runs from December through February across most of Japan, with Hokkaido remaining frozen well into March. Early morning shoots capture hoarfrost at its peak before the sun melts the delicate ice crystals. The contrast between traditional architecture and pristine snow creates compositions rich in cultural depth.

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72-hour requirements breakdown

What passed or failed, hour by hour
0matching hours in the next 95 hours
AND logic: all conditions required
Meets requirement
Misses requirement
Time
Asia/Tokyo
Time Window
Sunrise -45m to +90m
Frost Probability
≥ 60.0%
Wind Speed
≤ 1.5m/s
Sat, May 16
22:00✕0%1.7m/s
23:00✕0%1.8m/s
Sun, May 17
24:00✕0%1.7m/s
01:00✕0%1.6m/s
02:00✕0%1.6m/s
03:00✕0%1.8m/s
04:00✕0%1.6m/s
05:00✕0%1.8m/s
06:00✕0%1.8m/s
07:00✕0%1.1m/s
08:00✕0%0.58m/s
09:00✕0%0.69m/s
10:00✕0%1.3m/s
11:00✕0%1.4m/s
12:00✕0%1.9m/s
13:00✕0%2.1m/s
14:00✕0%2m/s
15:00✕0%2.1m/s
16:00✕0%2m/s
17:00✕0%0.98m/s
18:00✕0%0.38m/s
19:00✕0%1.2m/s
20:00✕0%1.8m/s
21:00✕0%1.8m/s
22:00✕0%1.7m/s
23:00✕0%1.4m/s
Mon, May 18
24:00✕0%1.2m/s
01:00✕0%1.7m/s
02:00✕0%1.1m/s
03:00✕0%0.94m/s
04:00✕0%1.5m/s
05:00✕0%1.8m/s
06:00✕0%1.5m/s
07:00✕0%0.87m/s
08:00✕0%0.67m/s
09:00✕0%0.94m/s
10:00✕0%1.2m/s
11:00✕0%1.7m/s
12:00✕0%2.2m/s
13:00✕0%1.8m/s
14:00✕0%2.2m/s
15:00✕0%3m/s
16:00✕0%2.5m/s
17:00✕0%1.2m/s
18:00✕0%0.7m/s
19:00✕0%0.51m/s
20:00✕0%1.3m/s
21:00✕0%1.6m/s
22:00✕0%2m/s
23:00✕0%2.1m/s
Tue, May 19
24:00✕0%2.1m/s
01:00✕0%1.9m/s
02:00✕0%2m/s
03:00✕0%1.1m/s
04:00✕0%1.6m/s
05:00✕0%2m/s
06:00✕0%1.3m/s
07:00✕0%0.41m/s
08:00✕0%1.2m/s
09:00✕0%1.7m/s
10:00✕0%2.1m/s
11:00✕0%1.5m/s
12:00✕0%2.3m/s
13:00✕0%1.1m/s
14:00✕0%1.7m/s
15:00✕0%2.5m/s
16:00✕0%2m/s
17:00✕0%1.4m/s
18:00✕0%1.3m/s
19:00✕0%0.88m/s
20:00✕0%0.92m/s
21:00✕0%0.78m/s
22:00✕0%0.53m/s
23:00✕0%1.7m/s
Wed, May 20
24:00✕0%1.8m/s
01:00✕0%1.8m/s
02:00✕0%1.6m/s
03:00✕0%1.7m/s
04:00✕0%1.7m/s
05:00✕0%1.7m/s
06:00✕0%1.6m/s
07:00✕0%1.8m/s
08:00✕0%1.9m/s
09:00✕0%2m/s
10:00✕0%2m/s
11:00✕0%1.9m/s
12:00✕0%1.8m/s
13:00✕0%1.7m/s
14:00✕0%1.5m/s
15:00✕0%1.3m/s
16:00✕0%1.4m/s
17:00✕0%1.5m/s
18:00✕0%1.7m/s
19:00✕0%1.7m/s
20:00✕0%1.6m/s
How to read: colored cells show whether each predicate requirement is met; highlighted rows mean the full rule matched (an opportunity).

What does Frost Probability 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/Tokyo
Dew Point
°C
Surface Temperature
°C
Temperature
°C
Time Window
Total Cloud Coverage
%
Vapor Pressure Deficit
kPa
Sun, May 17 Sunrise 05:07 Sunset 19:06
22:00 ☾
12°C 19°C 18°C - 9% 0.57kPa
23:00 ☾
12°C 19°C 17°C - 77% 0.57kPa
Mon, May 18 Sunrise 05:07 Sunset 19:06
24:00 ☾
11°C 19°C 17°C - 100% 0.57kPa
01:00 ☾
11°C 19°C 17°C - 100% 0.6kPa
02:00 ☾
11°C 18°C 16°C - 100% 0.57kPa
03:00 ☾
11°C 18°C 16°C - 99% 0.53kPa
04:00 ☾
10°C 18°C 16°C - 100% 0.53kPa
05:00 ☾
9.9°C 18°C 15°C - 94% 0.54kPa
06:00 ☾
11°C 17°C 16°C - 72% 0.53kPa
07:00 ☾
11°C 17°C 18°C - 36% 0.7kPa
08:00 ☾
12°C 17°C 19°C - 5% 0.87kPa
09:00
12°C 18°C 21°C - 4% 1.1kPa
10:00
12°C 18°C 22°C - 5% 1.2kPa
11:00
11°C 18°C 22°C - 4% 1.3kPa
12:00
12°C 19°C 22°C - 0% 1.3kPa
13:00
13°C 19°C 23°C - 0% 1.3kPa
14:00
13°C 19°C 23°C - 0% 1.3kPa
15:00
13°C 20°C 22°C - 0% 1.2kPa
16:00
14°C 20°C 22°C - 0% 0.97kPa
17:00
15°C 20°C 22°C - 0% 0.88kPa
18:00
16°C 20°C 21°C - 0% 0.64kPa
19:00
15°C 20°C 18°C - 0% 0.41kPa
20:00 ☾
15°C 20°C 18°C - 0% 0.38kPa
21:00 ☾
15°C 19°C 18°C - 0% 0.36kPa
22:00 ☾
14°C 19°C 17°C - 0% 0.35kPa
23:00 ☾
14°C 19°C 17°C - 0% 0.33kPa
Tue, May 19 Sunrise 05:07 Sunset 19:07
24:00 ☾
14°C 19°C 17°C - 0% 0.28kPa
01:00 ☾
14°C 19°C 16°C - 0% 0.21kPa
02:00 ☾
15°C 18°C 16°C - 0% 0.16kPa
03:00 ☾
15°C 18°C 16°C - 0% 0.15kPa
04:00 ☾
14°C 18°C 16°C - 0% 0.14kPa
05:00 ☾
14°C 18°C 16°C - 0% 0.14kPa
06:00 ☾
15°C 18°C 16°C - 3% 0.19kPa
07:00 ☾
15°C 17°C 18°C - 1% 0.35kPa
08:00 ☾
15°C 18°C 19°C - 6% 0.52kPa
09:00
15°C 18°C 20°C - 73% 0.62kPa
10:00
15°C 18°C 20°C - 60% 0.65kPa
11:00
15°C 18°C 21°C - 8% 0.76kPa
12:00
15°C 19°C 21°C - 12% 0.9kPa
13:00
14°C 19°C 22°C - 7% 1kPa
14:00
12°C 19°C 23°C - 3% 1.4kPa
15:00
13°C 20°C 23°C - 5% 1.3kPa
16:00
14°C 20°C 22°C - 5% 1.1kPa
17:00
14°C 20°C 21°C - 100% 0.94kPa
18:00
15°C 20°C 20°C - 100% 0.65kPa
19:00
15°C 20°C 19°C - 100% 0.53kPa
20:00 ☾
15°C 20°C 19°C - 100% 0.51kPa
21:00 ☾
15°C 20°C 19°C - 100% 0.46kPa
22:00 ☾
15°C 19°C 18°C - 100% 0.39kPa
23:00 ☾
15°C 19°C 18°C - 100% 0.44kPa
Wed, May 20 Sunrise 05:06 Sunset 19:08
24:00 ☾
14°C 19°C 19°C - 100% 0.55kPa
01:00 ☾
13°C 19°C 19°C - 100% 0.65kPa
02:00 ☾
12°C 19°C 19°C - 100% 0.7kPa
03:00 ☾
13°C 19°C 18°C - 100% 0.64kPa
04:00 ☾
14°C 19°C 19°C - 100% 0.58kPa
05:00 ☾
16°C 18°C 20°C - 100% 0.5kPa
06:00 ☾
17°C 18°C 20°C - 100% 0.42kPa
07:00 ☾
18°C 18°C 20°C - 100% 0.38kPa
08:00 ☾
18°C 18°C 20°C - 100% 0.34kPa
09:00
18°C 18°C 20°C - 100% 0.3kPa
10:00
18°C 18°C 20°C - 100% 0.26kPa
11:00
18°C 18°C 19°C - 100% 0.23kPa
12:00
17°C 18°C 19°C - 100% 0.2kPa
13:00
17°C 18°C 18°C - 100% 0.16kPa
14:00
17°C 18°C 18°C - 100% 0.13kPa
15:00
17°C 18°C 17°C - 100% 0.11kPa
16:00
17°C 18°C 17°C - 100% 0.08kPa
17:00
17°C 18°C 17°C - 100% 0.05kPa
18:00
17°C 18°C 17°C - 100% 0.03kPa
19:00
17°C 18°C 17°C - 100% 0.03kPa
20:00 ☾
17°C 17°C 17°C - 100% 0.03kPa
21:00 ☾
16°C 17°C 17°C - 100% 0.03kPa
How to read: these inputs help produce the derived score; they are not requirements by themselves.

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