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Rule Morning Frost

Nikko - Morning Frost - Japan

Nikkō, Tochigi, 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)
Frost Probability 100% failing
Time Window 88% failing
Wind Speed 67% failing

Currently

Real-time conditions
Frost Probability
21%
Soil Temperature3.2°C
Dew Point1.4°C (low dew point)
Wind Speed3.0m/s (calm conditions)
Cloud Cover40%

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
Sun, Feb 22
04:00✕56%1.8m/s
05:00✓56%1.8m/s
06:00✓56%1.9m/s
07:00✓61%1.6m/s
08:00✕78%1.1m/s
09:00✕76%1.8m/s
10:00✕74%2.1m/s
11:00✕57%2.4m/s
12:00✕50%2.6m/s
13:00✕50%2.8m/s
14:00✕50%2.6m/s
15:00✕50%2.7m/s
16:00✕52%2.4m/s
17:00✕48%1.7m/s
18:00✕45%1.5m/s
19:00✕43%1.8m/s
20:00✕43%1.9m/s
21:00✕43%2.5m/s
22:00✕43%2.8m/s
23:00✕48%2.9m/s
Mon, Feb 23
24:00✕43%3.2m/s
01:00✕43%3.2m/s
02:00✕35%3m/s
03:00✕35%3.1m/s
04:00✕21%3m/s
05:00✓22%2.6m/s
06:00✓26%2m/s
07:00✓19%1.9m/s
08:00✕43%0.9m/s
09:00✕50%1.6m/s
10:00✕50%2.6m/s
11:00✕48%3.1m/s
12:00✕4.4%3m/s
13:00✕4.4%2.8m/s
14:00✕4.4%2.6m/s
15:00✕0%2.6m/s
16:00✕0%2.2m/s
17:00✕0%1.8m/s
18:00✕3.3%1.3m/s
19:00✕3.3%0.9m/s
20:00✕2.5%0.85m/s
21:00✕1.8%1.3m/s
22:00✕17%1.8m/s
23:00✕19%1.3m/s
Tue, Feb 24
24:00✕26%1.4m/s
01:00✕26%1.3m/s
02:00✕20%1.7m/s
03:00✕22%1.5m/s
04:00✕22%1.4m/s
05:00✓25%1.4m/s
06:00✓21%1.6m/s
07:00✓19%1.7m/s
08:00✕30%1.8m/s
09:00✕35%2.1m/s
10:00✕37%2.2m/s
11:00✕37%2.7m/s
12:00✕35%3m/s
13:00✕35%3.1m/s
14:00✕3%2.9m/s
15:00✕3.2%2.7m/s
16:00✕2.7%2.6m/s
17:00✕1.9%2m/s
18:00✕17%1.8m/s
19:00✕19%1.6m/s
20:00✕15%1.5m/s
21:00✕13%1.8m/s
22:00✕13%2m/s
23:00✕13%1.9m/s
Wed, Feb 25
24:00✕13%2m/s
01:00✕13%2m/s
02:00✕13%1.7m/s
03:00✕13%1.7m/s
04:00✕15%1m/s
05:00✓17%0.78m/s
06:00✓17%0.41m/s
07:00✓17%0.31m/s
08:00✕21%0.54m/s
09:00✕22%1.4m/s
10:00✕19%1.3m/s
11:00✕17%1.2m/s
12:00✕39%1.1m/s
13:00✕39%1.2m/s
14:00✕39%1.2m/s
15:00✕39%1.3m/s
16:00✕39%1.5m/s
17:00✕37%1.7m/s
18:00✕37%1.9m/s
19:00✕37%1.8m/s
20:00✕37%1.7m/s
21:00✕39%1.6m/s
22:00✕38%1.8m/s
23:00✕41%2m/s
Thu, Feb 26
24:00✕44%2.2m/s
01:00✕48%2.2m/s
02:00✕55%2.1m/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
Mon, Feb 23 Sunrise 06:21 Sunset 17:28
04:00 ☾
1.4°C 3.2°C 3.4°C - 40% 0.1kPa
05:00 ☾
2°C 3.3°C 4.3°C - 92% 0.12kPa
06:00 ☾
2.5°C 3.4°C 4.8°C - 46% 0.13kPa
07:00 ☾
2.2°C 3.3°C 4.1°C - 90% 0.1kPa
08:00 ☾
2.7°C 3.6°C 5.7°C - 15% 0.18kPa
09:00 ☾
3°C 4.1°C 8.2°C - 7% 0.33kPa
10:00 ☾
2.8°C 4.8°C 9.8°C - 3% 0.47kPa
11:00 ☾
2.5°C 5.6°C 11°C - 2% 0.56kPa
12:00 ☾
2.3°C 6.4°C 11°C - 3% 0.63kPa
13:00 ☾
1.5°C 7.1°C 12°C - 2% 0.7kPa
14:00 ☾
0.8°C 7.7°C 12°C - 3% 0.74kPa
15:00 ☾
0.6°C 8.2°C 11°C - 0% 0.7kPa
16:00 ☾
1.6°C 8.4°C 10°C - 0% 0.55kPa
17:00 ☾
2.9°C 8.3°C 7°C - 0% 0.25kPa
18:00 ☾
2.5°C 7.8°C 4.1°C - 6% 0.09kPa
19:00 ☾
2.1°C 7.3°C 3.3°C - 6% 0.06kPa
20:00 ☾
1.7°C 6.8°C 2.8°C - 35% 0.06kPa
21:00 ☾
1.5°C 6.4°C 2.7°C - 100% 0.06kPa
22:00 ☾
1.5°C 6°C 2.8°C - 100% 0.06kPa
23:00 ☾
1.7°C 5.7°C 2.9°C - 100% 0.07kPa
Tue, Feb 24 Sunrise 06:19 Sunset 17:29
24:00 ☾
1.4°C 5.3°C 2.1°C - 18% 0.03kPa
01:00 ☾
1°C 5°C 1.5°C - 25% 0.03kPa
02:00 ☾
1°C 4.7°C 1.6°C - 38% 0.03kPa
03:00 ☾
0.7°C 4.5°C 1.4°C - 33% 0.03kPa
04:00 ☾
0.3°C 4.2°C 1°C - 32% 0.03kPa
05:00 ☾
-0.3°C 4°C 0.73°C - 57% 0.04kPa
06:00 ☾
-0.8°C 3.7°C 0.28°C - 94% 0.05kPa
07:00 ☾
-0.7°C 3.4°C 1.2°C - 100% 0.09kPa
08:00 ☾
0°C 3.5°C 4°C - 100% 0.2kPa
09:00 ☾
0.2°C 3.7°C 5.6°C - 100% 0.29kPa
10:00 ☾
0.6°C 4.2°C 6.8°C - 100% 0.35kPa
11:00 ☾
1°C 4.8°C 7.5°C - 89% 0.38kPa
12:00 ☾
1.5°C 5.3°C 8.1°C - 100% 0.4kPa
13:00 ☾
1.6°C 5.8°C 7.9°C - 100% 0.38kPa
14:00 ☾
1.6°C 6.2°C 7°C - 100% 0.32kPa
15:00 ☾
1.4°C 6.4°C 6.5°C - 100% 0.29kPa
16:00 ☾
1.4°C 6.4°C 5.1°C - 100% 0.2kPa
17:00 ☾
1.5°C 6.3°C 3.8°C - 100% 0.12kPa
18:00 ☾
1.3°C 6°C 2.5°C - 100% 0.06kPa
19:00 ☾
1.4°C 5.7°C 2.7°C - 100% 0.06kPa
20:00 ☾
2.1°C 5.5°C 3.1°C - 100% 0.05kPa
21:00 ☾
2.7°C 5.3°C 3.2°C - 100% 0.02kPa
22:00 ☾
3.2°C 5.2°C 3.8°C - 100% 0.03kPa
23:00 ☾
3.6°C 5.1°C 4.3°C - 100% 0.04kPa
Wed, Feb 25 Sunrise 06:18 Sunset 17:30
24:00 ☾
4.4°C 5.1°C 5°C - 100% 0.04kPa
01:00 ☾
5°C 5.1°C 5.4°C - 100% 0.02kPa
02:00 ☾
5.3°C 5.1°C 5.6°C - 100% 0.02kPa
03:00 ☾
5.1°C 5.1°C 5.2°C - 100% 0.01kPa
04:00 ☾
5.1°C 5.1°C 5.5°C - 100% 0.03kPa
05:00 ☾
4.9°C 5.1°C 5.5°C - 100% 0.03kPa
06:00 ☾
4.8°C 5.2°C 5.4°C - 100% 0.04kPa
07:00 ☾
4.9°C 5.1°C 5.4°C - 100% 0.03kPa
08:00 ☾
5.3°C 5.3°C 6.6°C - 100% 0.09kPa
09:00 ☾
5.2°C 5.5°C 7.2°C - 100% 0.13kPa
10:00 ☾
4.2°C 4.3°C 5.5°C - 100% 0.08kPa
11:00 ☾
3.1°C 3.1°C 3.8°C - 100% 0.04kPa
12:00 ☾
2°C 1.9°C 2.1°C - 100% 0kPa
13:00 ☾
1.9°C 1.9°C 2°C - 100% 0kPa
14:00 ☾
1.9°C 1.9°C 1.9°C - 100% 0kPa
15:00 ☾
1.8°C 1.9°C 1.9°C - 100% 0kPa
16:00 ☾
1.7°C 1.8°C 1.8°C - 100% 0kPa
17:00 ☾
1.6°C 1.8°C 1.7°C - 100% 0.01kPa
18:00 ☾
1.4°C 1.7°C 1.6°C - 100% 0.01kPa
19:00 ☾
1.1°C 1.7°C 1.4°C - 99% 0.01kPa
20:00 ☾
0.8°C 1.6°C 1.1°C - 98% 0.01kPa
21:00 ☾
0.5°C 1.6°C 0.91°C - 97% 0.02kPa
22:00 ☾
0.2°C 1.5°C 0.66°C - 78% 0.02kPa
23:00 ☾
-0.2°C 1.5°C 0.41°C - 59% 0.03kPa
Thu, Feb 26 Sunrise 06:17 Sunset 17:31
24:00 ☾
-0.5°C 1.4°C 0.16°C - 40% 0.03kPa
01:00 ☾
0.3°C 1.5°C 1.7°C - 27% 0.07kPa
02:00 ☾
1.1°C 1.6°C 3.3°C - 14% 0.11kPa
03:00 ☾
1.8°C 1.7°C 4.9°C - 2% 0.17kPa
How to read: these inputs help produce the derived score; they are not requirements by themselves.

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