Rule Morning Frost

Morning Frost Forecast for Mount Fuji, Japan

Fujinomiya, Shizuoka, Japan

Mount Fuji's volcanic cone rises beyond the Fuji Five Lakes, where shorelines, reflections, and nearby pagodas provide layered foregrounds.

Currently

Real-time conditions

Frost Probability

Soil Temperature22.0°C

Dew Point20.9°C (high dew point)

Wind Speed1.5m/s (calm conditions)

Cloud Cover52%

Upcoming Opportunities

When all conditions match, PhotoWeather marks an opportunity window.

Times shown in Asia/Tokyo

No opportunities in the next 14 days

See which requirements block the most forecast hours below.

Most common blockers (95-hour forecast)

Time Window100% of hours
Frost Probability100% of hours
Wind Speed44% of hours

How this forecast is evaluated

See which weather signals PhotoWeather uses to identify Morning Frost conditions across Japan. The requirements and hourly values below show how those signals apply at Mount Fuji.

Explore Morning Frost conditions across Japan →

Recorded match history

Completed PhotoWeather forecast matches recorded for this exact rule at Mount Fuji during the last 365 days.

Last 30 days

recorded matching windows

Last 90 days

recorded matching windows

Last 365 days

recorded matching windows · 85% average confidence

Only 3 completed matches are recorded in the last 365 days—insufficient history to identify a reliable typical start time or month.

These figures use completed PhotoWeather MatchEvent records from the previous 365 days only. They describe recorded forecast matches, not observations, climatological probability, or a guarantee of future conditions.

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95-hour requirements breakdown

When available, the detailed table below covers only the stated 95-hour horizon (typically 72–168 hours, depending on available hourly data). Opportunity records above span the next 14 days, so this table does not explain that entire 14-day period.

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, Aug 22
04:00	✕	0%	0.53m/s
05:00	✕	0%	0.75m/s
06:00	✕	0%	1.1m/s
07:00	✕	0%	0.25m/s
08:00	✕	0%	0.38m/s
09:00	✕	0%	0.81m/s
10:00	✕	0%	1.8m/s
11:00	✕	0%	2.4m/s
12:00	✕	0%	3m/s
13:00	✕	0%	2.9m/s
14:00	✕	0%	2.9m/s
15:00	✕	0%	2.7m/s
16:00	✕	0%	2.5m/s
17:00	✕	0%	1.9m/s
18:00	✕	0%	1.5m/s
19:00	✕	0%	1.1m/s
20:00	✕	0%	0.41m/s
21:00	✕	0%	0.12m/s
22:00	✕	0%	0.63m/s
23:00	✕	0%	0.83m/s
Sun, Aug 23
24:00	✕	0%	0.7m/s
01:00	✕	0%	0.37m/s
02:00	✕	0%	0.27m/s
03:00	✕	0%	0.88m/s
04:00	✕	0%	1.4m/s
05:00	✕	0%	1.5m/s
06:00	✕	0%	1.6m/s
07:00	✕	0%	1.1m/s
08:00	✕	0%	0.27m/s
09:00	✕	0%	1.2m/s
10:00	✕	0%	2.2m/s
11:00	✕	0%	2.6m/s
12:00	✕	0%	2.4m/s
13:00	✕	0%	2.2m/s
14:00	✕	0%	2.2m/s
15:00	✕	0%	2.5m/s
16:00	✕	0%	2m/s
17:00	✕	0%	1.7m/s
18:00	✕	0%	1.3m/s
19:00	✕	0%	1.2m/s
20:00	✕	0%	0.46m/s
21:00	✕	0%	0.18m/s
22:00	✕	0%	0.16m/s
23:00	✕	0%	0.4m/s
Mon, Aug 24
24:00	✕	0%	0.75m/s
01:00	✕	0%	0.76m/s
02:00	✕	0%	0.89m/s
03:00	✕	0%	1.2m/s
04:00	✕	0%	1.8m/s
05:00	✕	0%	1.6m/s
06:00	✕	0%	1.7m/s
07:00	✕	0%	0.9m/s
08:00	✕	0%	0.22m/s
09:00	✕	0%	1.5m/s
10:00	✕	0%	2.3m/s
11:00	✕	0%	2.8m/s
12:00	✕	0%	2.8m/s
13:00	✕	0%	2.8m/s
14:00	✕	0%	3.1m/s
15:00	✕	0%	2.6m/s
16:00	✕	0%	2.2m/s
17:00	✕	0%	2m/s
18:00	✕	0%	1.6m/s
19:00	✕	0%	1.1m/s
20:00	✕	0%	0.87m/s
21:00	✕	0%	0.47m/s
22:00	✕	0%	0.64m/s
23:00	✕	0%	0.23m/s
Tue, Aug 25
24:00	✕	0%	0.17m/s
01:00	✕	0%	0.23m/s
02:00	✕	0%	0.31m/s
03:00	✕	0%	0.33m/s
04:00	✕	0%	0.74m/s
05:00	✕	0%	1.4m/s
06:00	✕	0%	1.6m/s
07:00	✕	0%	0.61m/s
08:00	✕	0%	0.8m/s
09:00	✕	0%	1.9m/s
10:00	✕	0%	1.9m/s
11:00	✕	0%	2m/s
12:00	✕	0%	2m/s
13:00	✕	0%	2m/s
14:00	✕	0%	2m/s
15:00	✕	0%	2m/s
16:00	✕	0%	1.8m/s
17:00	✕	0%	1.7m/s
18:00	✕	0%	1.5m/s
19:00	✕	0%	1.4m/s
20:00	✕	0%	1.3m/s
21:00	✕	0%	1.2m/s
22:00	✕	0%	1.1m/s
23:00	✕	0%	1m/s
Wed, Aug 26
24:00	✕	0%	0.98m/s
01:00	✕	0%	1.1m/s
02:00	✕	0%	1.2m/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, Aug 23 Sunrise 05:10 Sunset 18:26
05:00 ☾	21°C	22°C	21°C	-	52%	0.08kPa
06:00 ☾	21°C	22°C	22°C	-	85%	0.11kPa
07:00 ☾	21°C	22°C	23°C	-	54%	0.24kPa
08:00 ☾	22°C	22°C	24°C	-	99%	0.46kPa
09:00	22°C	22°C	26°C	-	99%	0.7kPa
10:00	22°C	22°C	26°C	-	100%	0.78kPa
11:00	22°C	23°C	26°C	-	100%	0.69kPa
12:00	22°C	23°C	25°C	-	88%	0.58kPa
13:00	22°C	23°C	25°C	-	100%	0.54kPa
14:00	22°C	23°C	25°C	-	100%	0.5kPa
15:00	22°C	23°C	25°C	-	100%	0.43kPa
16:00	22°C	23°C	24°C	-	100%	0.3kPa
17:00	22°C	23°C	23°C	-	95%	0.19kPa
18:00	22°C	23°C	22°C	-	94%	0.08kPa
19:00 ☾	21°C	23°C	22°C	-	80%	0.05kPa
20:00 ☾	21°C	23°C	21°C	-	79%	0.04kPa
21:00 ☾	21°C	22°C	21°C	-	66%	0.04kPa
22:00 ☾	21°C	22°C	21°C	-	37%	0.04kPa
23:00 ☾	20°C	22°C	21°C	-	52%	0.04kPa
Mon, Aug 24 Sunrise 05:11 Sunset 18:24
24:00 ☾	20°C	22°C	21°C	-	43%	0.05kPa
01:00 ☾	20°C	22°C	21°C	-	34%	0.07kPa
02:00 ☾	20°C	22°C	21°C	-	41%	0.08kPa
03:00 ☾	20°C	22°C	20°C	-	45%	0.09kPa
04:00 ☾	20°C	22°C	20°C	-	49%	0.1kPa
05:00 ☾	20°C	21°C	20°C	-	48%	0.12kPa
06:00 ☾	20°C	21°C	21°C	-	37%	0.14kPa
07:00 ☾	21°C	21°C	22°C	-	23%	0.3kPa
08:00 ☾	21°C	21°C	24°C	-	8%	0.51kPa
09:00	21°C	22°C	26°C	-	53%	0.78kPa
10:00	21°C	22°C	26°C	-	76%	0.92kPa
11:00	21°C	22°C	26°C	-	63%	0.82kPa
12:00	22°C	22°C	26°C	-	68%	0.8kPa
13:00	21°C	22°C	26°C	-	77%	0.87kPa
14:00	22°C	23°C	26°C	-	80%	0.73kPa
15:00	22°C	23°C	25°C	-	49%	0.49kPa
16:00	22°C	23°C	25°C	-	59%	0.49kPa
17:00	22°C	23°C	24°C	-	71%	0.34kPa
18:00	22°C	23°C	23°C	-	61%	0.12kPa
19:00 ☾	22°C	23°C	22°C	-	72%	0.04kPa
20:00 ☾	22°C	23°C	22°C	-	82%	0.03kPa
21:00 ☾	22°C	23°C	22°C	-	63%	0.03kPa
22:00 ☾	22°C	23°C	22°C	-	48%	0.03kPa
23:00 ☾	22°C	22°C	22°C	-	68%	0.04kPa
Tue, Aug 25 Sunrise 05:11 Sunset 18:23
24:00 ☾	21°C	22°C	22°C	-	67%	0.07kPa
01:00 ☾	21°C	22°C	21°C	-	60%	0.08kPa
02:00 ☾	21°C	22°C	21°C	-	59%	0.06kPa
03:00 ☾	21°C	22°C	21°C	-	54%	0.07kPa
04:00 ☾	21°C	22°C	21°C	-	36%	0.09kPa
05:00 ☾	20°C	22°C	21°C	-	20%	0.15kPa
06:00 ☾	20°C	22°C	22°C	-	35%	0.2kPa
07:00 ☾	21°C	22°C	23°C	-	7%	0.39kPa
08:00 ☾	21°C	22°C	25°C	-	30%	0.62kPa
09:00	21°C	22°C	26°C	-	50%	0.86kPa
10:00	22°C	3257°C	26°C	-	49%	0.83kPa
11:00	22°C	6491°C	27°C	-	48%	0.81kPa
12:00	23°C	9726°C	27°C	-	47%	0.78kPa
13:00	23°C	9726°C	26°C	-	45%	0.72kPa
14:00	23°C	9726°C	26°C	-	43%	0.67kPa
15:00	23°C	9726°C	26°C	-	42%	0.61kPa
16:00	22°C	9726°C	26°C	-	29%	0.58kPa
17:00	22°C	9726°C	25°C	-	15%	0.54kPa
18:00	22°C	9726°C	25°C	-	2%	0.51kPa
19:00 ☾	22°C	9726°C	25°C	-	2%	0.51kPa
20:00 ☾	22°C	9726°C	25°C	-	1%	0.5kPa
21:00 ☾	22°C	9726°C	25°C	-	0%	0.5kPa
22:00 ☾	22°C	9726°C	25°C	-	0%	0.51kPa
23:00 ☾	22°C	9726°C	25°C	-	0%	0.52kPa
Wed, Aug 26 Sunrise 05:12 Sunset 18:22
24:00 ☾	22°C	9726°C	25°C	-	0%	0.53kPa
01:00 ☾	22°C	9726°C	25°C	-	0%	0.66kPa
02:00 ☾	22°C	9726°C	26°C	-	0%	0.81kPa
03:00 ☾	22°C	9726°C	27°C	-	0%	0.97kPa
04:00 ☾	22°C	9726°C	27°C	-	7%	0.95kPa

How to read: these inputs help produce the derived score; they are not requirements by themselves.

How this forecast is made

Opportunities are threshold-based signals: PhotoWeather checks whether forecast conditions match the rules for a photography scenario. They are planning guidance, not guarantees. Forecasts can change as new model runs arrive, and confidence generally decreases farther into the forecast horizon, so recheck conditions before travelling.

The weather forecast foundation comes through Open-Meteo , which aggregates models from weather agencies. PhotoWeather applies condition-specific thresholds and derived calculations; not every condition uses every model or data input.

How opportunities work → Weather data sources →

Forecast generated

Aug 22, 2026, 7:01 PM UTC

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