Rule
Morning Frost
Biei - Morning Frost - Japan
Biei, Hokkaido, 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 88% failing
Currently
Real-time conditionsSoil Temperature17.3°C
Dew Point16.2°C (high dew point)
Wind Speed1.5m/s (calm conditions)
Cloud Cover100%
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 ruleJapan'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 hour0matching 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 |
|---|---|---|---|
| Tue, Jul 7 | |||
| 22:00 | ✕ | 0% | 2.5m/s |
| 23:00 | ✕ | 0% | 2.4m/s |
| Wed, Jul 8 | |||
| 24:00 | ✕ | 0% | 2.4m/s |
| 01:00 | ✕ | 0% | 2m/s |
| 02:00 | ✕ | 0% | 2.4m/s |
| 03:00 | ✕ | 0% | 2m/s |
| 04:00 | ✕ | 0% | 2.1m/s |
| 05:00 | ✕ | 0% | 1.9m/s |
| 06:00 | ✕ | 0% | 1.7m/s |
| 07:00 | ✕ | 0% | 1.3m/s |
| 08:00 | ✕ | 0% | 1.8m/s |
| 09:00 | ✕ | 0% | 1.8m/s |
| 10:00 | ✕ | 0% | 1.9m/s |
| 11:00 | ✕ | 0% | 1.8m/s |
| 12:00 | ✕ | 0% | 1.4m/s |
| 13:00 | ✕ | 0% | 1.7m/s |
| 14:00 | ✕ | 0% | 2m/s |
| 15:00 | ✕ | 0% | 2.2m/s |
| 16:00 | ✕ | 0% | 2m/s |
| 17:00 | ✕ | 0% | 1.7m/s |
| 18:00 | ✕ | 0% | 1.2m/s |
| 19:00 | ✕ | 0% | 0.42m/s |
| 20:00 | ✕ | 0% | 0.88m/s |
| 21:00 | ✕ | 0% | 1.6m/s |
| 22:00 | ✕ | 0% | 1.9m/s |
| 23:00 | ✕ | 0% | 1.5m/s |
| Thu, Jul 9 | |||
| 24:00 | ✕ | 0% | 1.8m/s |
| 01:00 | ✕ | 0% | 2.1m/s |
| 02:00 | ✕ | 0% | 2m/s |
| 03:00 | ✕ | 0% | 2.1m/s |
| 04:00 | ✕ | 0% | 1.2m/s |
| 05:00 | ✕ | 0% | 0.99m/s |
| 06:00 | ✕ | 0% | 0.91m/s |
| 07:00 | ✕ | 0% | 1m/s |
| 08:00 | ✕ | 0% | 1.4m/s |
| 09:00 | ✕ | 0% | 1.7m/s |
| 10:00 | ✕ | 0% | 1.8m/s |
| 11:00 | ✕ | 0% | 2.1m/s |
| 12:00 | ✕ | 0% | 2.3m/s |
| 13:00 | ✕ | 0% | 2.1m/s |
| 14:00 | ✕ | 0% | 1.9m/s |
| 15:00 | ✕ | 0% | 2.3m/s |
| 16:00 | ✕ | 0% | 2.4m/s |
| 17:00 | ✕ | 0% | 2.5m/s |
| 18:00 | ✕ | 0% | 2.3m/s |
| 19:00 | ✕ | 0% | 2.9m/s |
| 20:00 | ✕ | 0% | 2.5m/s |
| 21:00 | ✕ | 0% | 2.7m/s |
| 22:00 | ✕ | 0% | 2.7m/s |
| 23:00 | ✕ | 0% | 2.6m/s |
| Fri, Jul 10 | |||
| 24:00 | ✕ | 0% | 2.8m/s |
| 01:00 | ✕ | 0% | 2.6m/s |
| 02:00 | ✕ | 0% | 2.7m/s |
| 03:00 | ✕ | 0% | 2.5m/s |
| 04:00 | ✕ | 0% | 2.5m/s |
| 05:00 | ✕ | 0% | 2.4m/s |
| 06:00 | ✕ | 0% | 1.9m/s |
| 07:00 | ✕ | 0% | 2m/s |
| 08:00 | ✕ | 0% | 2.2m/s |
| 09:00 | ✕ | 0% | 2.3m/s |
| 10:00 | ✕ | 0% | 2.8m/s |
| 11:00 | ✕ | 0% | 2.3m/s |
| 12:00 | ✕ | 0% | 2m/s |
| 13:00 | ✕ | 0% | 2m/s |
| 14:00 | ✕ | 0% | 2.5m/s |
| 15:00 | ✕ | 0% | 2m/s |
| 16:00 | ✕ | 0% | 1.8m/s |
| 17:00 | ✕ | 0% | 1.8m/s |
| 18:00 | ✕ | 0% | 2m/s |
| 19:00 | ✕ | 0% | 2m/s |
| 20:00 | ✕ | 0% | 2m/s |
| 21:00 | ✕ | 0% | 2.2m/s |
| 22:00 | ✕ | 0% | 2.5m/s |
| 23:00 | ✕ | 0% | 3m/s |
| Sat, Jul 11 | |||
| 24:00 | ✕ | 0% | 2.8m/s |
| 01:00 | ✕ | 0% | 2.5m/s |
| 02:00 | ✕ | 0% | 2.6m/s |
| 03:00 | ✕ | 0% | 2.5m/s |
| 04:00 | ✕ | 0% | 2.3m/s |
| 05:00 | ✕ | 0% | 2m/s |
| 06:00 | ✕ | 0% | 1.7m/s |
| 07:00 | ✕ | 0% | 1.6m/s |
| 08:00 | ✕ | 0% | 1.5m/s |
| 09:00 | ✕ | 0% | 1.4m/s |
| 10:00 | ✕ | 0% | 1.4m/s |
| 11:00 | ✕ | 0% | 1.4m/s |
| 12:00 | ✕ | 0% | 1.4m/s |
| 13:00 | ✕ | 0% | 1.8m/s |
| 14:00 | ✕ | 0% | 2.2m/s |
| 15:00 | ✕ | 0% | 2.6m/s |
| 16:00 | ✕ | 0% | 2.7m/s |
| 17:00 | ✕ | 0% | 2.8m/s |
| 18:00 | ✕ | 0% | 3m/s |
| 19:00 | ✕ | 0% | 2.9m/s |
| 20:00 | ✕ | 0% | 2.8m/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 scoreThis 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 |
|---|---|---|---|---|---|---|
| Wed, Jul 8
Sunrise 03:57
Sunset 19:13 | ||||||
| 23:00 ☾ | 16°C | 17°C | 17°C | - | 100% | 0.1kPa |
| Thu, Jul 9
Sunrise 03:57
Sunset 19:13 | ||||||
| 24:00 ☾ | 16°C | 17°C | 17°C | - | 100% | 0.11kPa |
| 01:00 ☾ | 16°C | 17°C | 17°C | - | 100% | 0.12kPa |
| 02:00 ☾ | 16°C | 17°C | 17°C | - | 100% | 0.16kPa |
| 03:00 ☾ | 16°C | 17°C | 17°C | - | 100% | 0.14kPa |
| 04:00 ☾ | 15°C | 17°C | 16°C | - | 100% | 0.12kPa |
| 05:00 ☾ | 15°C | 17°C | 17°C | - | 100% | 0.16kPa |
| 06:00 ☾ | 16°C | 17°C | 17°C | - | 100% | 0.2kPa |
| 07:00 ☾ | 16°C | 17°C | 19°C | - | 100% | 0.27kPa |
| 08:00 ☾ | 16°C | 17°C | 20°C | - | 100% | 0.53kPa |
| 09:00 | 17°C | 17°C | 21°C | - | 100% | 0.45kPa |
| 10:00 | 17°C | 17°C | 20°C | - | 100% | 0.41kPa |
| 11:00 | 17°C | 17°C | 21°C | - | 100% | 0.64kPa |
| 12:00 | 17°C | 17°C | 22°C | - | 100% | 0.75kPa |
| 13:00 | 17°C | 17°C | 22°C | - | 100% | 0.75kPa |
| 14:00 | 17°C | 17°C | 21°C | - | 100% | 0.49kPa |
| 15:00 | 18°C | 17°C | 21°C | - | 100% | 0.51kPa |
| 16:00 | 18°C | 17°C | 22°C | - | 100% | 0.53kPa |
| 17:00 | 18°C | 17°C | 21°C | - | 100% | 0.42kPa |
| 18:00 | 18°C | 17°C | 20°C | - | 100% | 0.35kPa |
| 19:00 | 17°C | 17°C | 19°C | - | 100% | 0.3kPa |
| 20:00 ☾ | 17°C | 17°C | 19°C | - | 100% | 0.22kPa |
| 21:00 ☾ | 17°C | 17°C | 19°C | - | 100% | 0.19kPa |
| 22:00 ☾ | 17°C | 17°C | 18°C | - | 100% | 0.15kPa |
| 23:00 ☾ | 17°C | 17°C | 19°C | - | 100% | 0.19kPa |
| Fri, Jul 10
Sunrise 03:57
Sunset 19:12 | ||||||
| 24:00 ☾ | 17°C | 17°C | 19°C | - | 100% | 0.2kPa |
| 01:00 ☾ | 18°C | 17°C | 19°C | - | 100% | 0.12kPa |
| 02:00 ☾ | 18°C | 17°C | 19°C | - | 100% | 0.11kPa |
| 03:00 ☾ | 18°C | 17°C | 18°C | - | 100% | 0.07kPa |
| 04:00 ☾ | 18°C | 17°C | 18°C | - | 100% | 0.07kPa |
| 05:00 ☾ | 18°C | 17°C | 19°C | - | 100% | 0.09kPa |
| 06:00 ☾ | 19°C | 17°C | 20°C | - | 100% | 0.12kPa |
| 07:00 ☾ | 19°C | 17°C | 19°C | - | 100% | 0.07kPa |
| 08:00 ☾ | 19°C | 17°C | 20°C | - | 100% | 0.12kPa |
| 09:00 | 20°C | 17°C | 22°C | - | 100% | 0.33kPa |
| 10:00 | 20°C | 18°C | 23°C | - | 100% | 0.41kPa |
| 11:00 | 20°C | 18°C | 24°C | - | 100% | 0.55kPa |
| 12:00 | 20°C | 18°C | 25°C | - | 100% | 0.81kPa |
| 13:00 | 21°C | 18°C | 25°C | - | 100% | 0.79kPa |
| 14:00 | 21°C | 18°C | 24°C | - | 100% | 0.61kPa |
| 15:00 | 20°C | 18°C | 22°C | - | 100% | 0.26kPa |
| 16:00 | 20°C | 18°C | 21°C | - | 100% | 0.18kPa |
| 17:00 | 20°C | 18°C | 21°C | - | 100% | 0.16kPa |
| 18:00 | 19°C | 18°C | 21°C | - | 100% | 0.22kPa |
| 19:00 | 19°C | 18°C | 20°C | - | 100% | 0.22kPa |
| 20:00 ☾ | 18°C | 18°C | 20°C | - | 100% | 0.23kPa |
| 21:00 ☾ | 18°C | 18°C | 20°C | - | 100% | 0.22kPa |
| 22:00 ☾ | 18°C | 18°C | 19°C | - | 100% | 0.2kPa |
| 23:00 ☾ | 18°C | 18°C | 19°C | - | 100% | 0.15kPa |
| Sat, Jul 11
Sunrise 03:58
Sunset 19:12 | ||||||
| 24:00 ☾ | 18°C | 18°C | 19°C | - | 100% | 0.09kPa |
| 01:00 ☾ | 18°C | 18°C | 19°C | - | 100% | 0.06kPa |
| 02:00 ☾ | 19°C | 18°C | 19°C | - | 100% | 0.05kPa |
| 03:00 ☾ | 19°C | 18°C | 19°C | - | 100% | 0.06kPa |
| 04:00 ☾ | 19°C | 18°C | 21°C | - | 100% | 0.2kPa |
| 05:00 ☾ | 20°C | 18°C | 22°C | - | 100% | 0.38kPa |
| 06:00 ☾ | 20°C | 18°C | 24°C | - | 100% | 0.58kPa |
| 07:00 ☾ | 20°C | 18°C | 23°C | - | 100% | 0.49kPa |
| 08:00 ☾ | 20°C | 18°C | 22°C | - | 100% | 0.41kPa |
| 09:00 | 19°C | 19°C | 22°C | - | 99% | 0.33kPa |
| 10:00 | 19°C | 19°C | 22°C | - | 100% | 0.36kPa |
| 11:00 | 20°C | 19°C | 22°C | - | 100% | 0.39kPa |
| 12:00 | 20°C | 19°C | 22°C | - | 100% | 0.42kPa |
| 13:00 | 19°C | 19°C | 21°C | - | 94% | 0.38kPa |
| 14:00 | 18°C | 19°C | 21°C | - | 88% | 0.35kPa |
| 15:00 | 18°C | 19°C | 20°C | - | 82% | 0.32kPa |
| 16:00 | 18°C | 19°C | 20°C | - | 84% | 0.28kPa |
| 17:00 | 18°C | 18°C | 20°C | - | 86% | 0.25kPa |
| 18:00 | 18°C | 18°C | 20°C | - | 88% | 0.21kPa |
| 19:00 | 18°C | 18°C | 19°C | - | 85% | 0.19kPa |
| 20:00 ☾ | 18°C | 18°C | 19°C | - | 82% | 0.16kPa |
| 21:00 ☾ | 18°C | 18°C | 19°C | - | 79% | 0.14kPa |
| 22:00 ☾ | 18°C | 18°C | 19°C | - | 80% | 0.17kPa |
How to read: these inputs help produce the derived score; they are not requirements by themselves.
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