Rule Morning Frost

Morning Frost Forecast for Hakone, Japan

Hakone, Kanagawa, Japan

Hakone surrounds Lake Ashi with wooded slopes, lakeside torii gates, and distant Mount Fuji views that work best as layered compositions.

Currently

Real-time conditions

Frost Probability

Soil Temperature24.2°C

Dew Point20.9°C (high dew point)

Wind Speed2.9m/s (calm conditions)

Cloud Cover97%

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 Speed92% 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 Hakone.

Explore Morning Frost conditions across Japan →

Recorded match history

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

Last 30 days

recorded matching windows

Last 90 days

recorded matching windows

Last 365 days

recorded matching windows · 66% average confidence

Only 7 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
Thu, Aug 13
13:00	✕	0%	3.2m/s
14:00	✕	0%	2.9m/s
15:00	✕	0%	2.7m/s
16:00	✕	0%	2.5m/s
17:00	✕	0%	2.1m/s
18:00	✕	0%	1.9m/s
19:00	✕	0%	1.8m/s
20:00	✕	0%	1.8m/s
21:00	✕	0%	1.8m/s
22:00	✕	0%	2.1m/s
23:00	✕	0%	2.2m/s
Fri, Aug 14
24:00	✕	0%	2.3m/s
01:00	✕	0%	2.3m/s
02:00	✕	0%	2.4m/s
03:00	✕	0%	2.1m/s
04:00	✕	0%	2.2m/s
05:00	✕	0%	2.1m/s
06:00	✕	0%	2.1m/s
07:00	✕	0%	2.4m/s
08:00	✕	0%	2.6m/s
09:00	✕	0%	2.6m/s
10:00	✕	0%	2.6m/s
11:00	✕	0%	2.8m/s
12:00	✕	0%	3m/s
13:00	✕	0%	2.9m/s
14:00	✕	0%	2.7m/s
15:00	✕	0%	2.6m/s
16:00	✕	0%	2.6m/s
17:00	✕	0%	2.4m/s
18:00	✕	0%	2m/s
19:00	✕	0%	1.8m/s
20:00	✕	0%	1.8m/s
21:00	✕	0%	1.8m/s
22:00	✕	0%	1.8m/s
23:00	✕	0%	1.8m/s
Sat, Aug 15
24:00	✕	0%	1.8m/s
01:00	✕	0%	1.9m/s
02:00	✕	0%	1.9m/s
03:00	✕	0%	1.9m/s
04:00	✕	0%	1.8m/s
05:00	✕	0%	1.8m/s
06:00	✕	0%	1.7m/s
07:00	✕	0%	1.8m/s
08:00	✕	0%	2.1m/s
09:00	✕	0%	2.5m/s
10:00	✕	0%	2.6m/s
11:00	✕	0%	3m/s
12:00	✕	0%	2.8m/s
13:00	✕	0%	2.6m/s
14:00	✕	0%	2.5m/s
15:00	✕	0%	2.4m/s
16:00	✕	0%	2.5m/s
17:00	✕	0%	2.3m/s
18:00	✕	0%	1.9m/s
19:00	✕	0%	1.4m/s
20:00	✕	0%	1.4m/s
21:00	✕	0%	1.6m/s
22:00	✕	0%	1.7m/s
23:00	✕	0%	1.6m/s
Sun, Aug 16
24:00	✕	0%	1.6m/s
01:00	✕	0%	1.6m/s
02:00	✕	0%	1.7m/s
03:00	✕	0%	1.7m/s
04:00	✕	0%	1.7m/s
05:00	✕	0%	1.8m/s
06:00	✕	0%	1.7m/s
07:00	✕	0%	1.9m/s
08:00	✕	0%	2m/s
09:00	✕	0%	2.1m/s
10:00	✕	0%	2.6m/s
11:00	✕	0%	2.8m/s
12:00	✕	0%	3.3m/s
13:00	✕	0%	3.3m/s
14:00	✕	0%	3.2m/s
15:00	✕	0%	2.9m/s
16:00	✕	0%	2.8m/s
17:00	✕	0%	2.6m/s
18:00	✕	0%	1.6m/s
19:00	✕	0%	1.4m/s
20:00	✕	0%	1.3m/s
21:00	✕	0%	1.2m/s
22:00	✕	0%	1.5m/s
23:00	✕	0%	1.7m/s
Mon, Aug 17
24:00	✕	0%	1.9m/s
01:00	✕	0%	2.3m/s
02:00	✕	0%	2.7m/s
03:00	✕	0%	3.1m/s
04:00	✕	0%	3.3m/s
05:00	✕	0%	3.6m/s
06:00	✕	0%	3.8m/s
07:00	✕	0%	3.6m/s
08:00	✕	0%	3.5m/s
09:00	✕	0%	3.4m/s
10:00	✕	0%	3m/s
11:00	✕	0%	2.6m/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
Fri, Aug 14 Sunrise 05:02 Sunset 18:34
13:00	21°C	24°C	26°C	-	97%	0.93kPa
14:00	21°C	24°C	26°C	-	90%	0.89kPa
15:00	21°C	25°C	26°C	-	59%	0.85kPa
16:00	21°C	25°C	25°C	-	44%	0.79kPa
17:00	21°C	25°C	25°C	-	43%	0.66kPa
18:00	21°C	24°C	23°C	-	31%	0.43kPa
19:00 ☾	21°C	24°C	22°C	-	28%	0.25kPa
20:00 ☾	20°C	24°C	22°C	-	12%	0.21kPa
21:00 ☾	20°C	24°C	22°C	-	6%	0.18kPa
22:00 ☾	20°C	23°C	21°C	-	7%	0.17kPa
23:00 ☾	20°C	23°C	21°C	-	7%	0.16kPa
Sat, Aug 15 Sunrise 05:02 Sunset 18:34
24:00 ☾	20°C	23°C	21°C	-	6%	0.15kPa
01:00 ☾	20°C	22°C	21°C	-	7%	0.15kPa
02:00 ☾	20°C	22°C	21°C	-	10%	0.14kPa
03:00 ☾	20°C	22°C	20°C	-	26%	0.13kPa
04:00 ☾	20°C	22°C	20°C	-	60%	0.12kPa
05:00 ☾	20°C	22°C	20°C	-	96%	0.13kPa
06:00 ☾	20°C	22°C	21°C	-	94%	0.19kPa
07:00 ☾	20°C	22°C	22°C	-	54%	0.35kPa
08:00 ☾	20°C	22°C	24°C	-	26%	0.59kPa
09:00	20°C	23°C	25°C	-	27%	0.85kPa
10:00	20°C	23°C	26°C	-	93%	1kPa
11:00	20°C	23°C	25°C	-	100%	0.87kPa
12:00	21°C	24°C	25°C	-	100%	0.69kPa
13:00	20°C	24°C	25°C	-	100%	0.75kPa
14:00	20°C	24°C	25°C	-	100%	0.87kPa
15:00	19°C	24°C	25°C	-	83%	1kPa
16:00	19°C	24°C	25°C	-	100%	1.1kPa
17:00	19°C	24°C	24°C	-	81%	0.82kPa
18:00	20°C	24°C	23°C	-	82%	0.52kPa
19:00 ☾	20°C	24°C	22°C	-	68%	0.33kPa
20:00 ☾	20°C	23°C	21°C	-	50%	0.25kPa
21:00 ☾	20°C	23°C	21°C	-	62%	0.19kPa
22:00 ☾	20°C	23°C	21°C	-	98%	0.17kPa
23:00 ☾	20°C	23°C	21°C	-	86%	0.17kPa
Sun, Aug 16 Sunrise 05:03 Sunset 18:32
24:00 ☾	20°C	23°C	21°C	-	99%	0.15kPa
01:00 ☾	20°C	22°C	21°C	-	100%	0.14kPa
02:00 ☾	20°C	22°C	21°C	-	100%	0.13kPa
03:00 ☾	20°C	22°C	20°C	-	100%	0.12kPa
04:00 ☾	20°C	22°C	20°C	-	92%	0.11kPa
05:00 ☾	19°C	22°C	20°C	-	82%	0.08kPa
06:00 ☾	19°C	22°C	20°C	-	100%	0.12kPa
07:00 ☾	19°C	21°C	21°C	-	100%	0.24kPa
08:00 ☾	19°C	22°C	22°C	-	85%	0.5kPa
09:00	17°C	22°C	24°C	-	81%	0.96kPa
10:00	16°C	22°C	25°C	-	66%	1.3kPa
11:00	17°C	23°C	26°C	-	61%	1.4kPa
12:00	18°C	23°C	26°C	-	100%	1.3kPa
13:00	18°C	24°C	26°C	-	100%	1.2kPa
14:00	18°C	24°C	26°C	-	100%	1.2kPa
15:00	17°C	24°C	26°C	-	100%	1.4kPa
16:00	16°C	24°C	26°C	-	50%	1.4kPa
17:00	17°C	24°C	25°C	-	100%	1.3kPa
18:00	18°C	24°C	23°C	-	100%	0.84kPa
19:00 ☾	18°C	24°C	22°C	-	100%	0.55kPa
20:00 ☾	19°C	23°C	21°C	-	100%	0.4kPa
21:00 ☾	19°C	23°C	21°C	-	100%	0.3kPa
22:00 ☾	19°C	23°C	21°C	-	100%	0.28kPa
23:00 ☾	19°C	22°C	21°C	-	100%	0.25kPa
Mon, Aug 17 Sunrise 05:04 Sunset 18:31
24:00 ☾	20°C	21°C	21°C	-	100%	0.23kPa
01:00 ☾	20°C	22°C	22°C	-	100%	0.37kPa
02:00 ☾	20°C	22°C	23°C	-	99%	0.54kPa
03:00 ☾	20°C	22°C	25°C	-	99%	0.72kPa
04:00 ☾	20°C	22°C	25°C	-	92%	0.89kPa
05:00 ☾	20°C	23°C	26°C	-	86%	1.1kPa
06:00 ☾	20°C	23°C	27°C	-	80%	1.3kPa
07:00 ☾	20°C	24°C	27°C	-	87%	1.2kPa
08:00 ☾	20°C	24°C	26°C	-	93%	1.1kPa
09:00	20°C	24°C	26°C	-	100%	1kPa
10:00	21°C	24°C	25°C	-	93%	0.78kPa
11:00	21°C	24°C	24°C	-	86%	0.57kPa
12:00	21°C	24°C	23°C	-	79%	0.37kPa

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 14, 2026, 3:10 AM UTC

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