Rule Morning Frost

Morning Frost Forecast for Biei, Japan

Biei, Hokkaido, Japan

Biei's rolling fields create clean bands of color and isolated-tree studies, while the Blue Pond and birch woods add reflective winter subjects.

0 matching opportunities in the 14-day forecast.

Hourly forecast scores

Forecast valid from Oct 7, 2026, 11:00 PM UTC (one hour; not an observation)

Frost Probability

Soil Temperature13.7°C

Dew Point5.9°C

Wind Speed3.4m/s

Cloud Cover94%

Upcoming Opportunities

When all conditions match, PhotoWeather marks an opportunity window.

Times shown in Asia/Tokyo

No matching opportunities in this 14-day forecast

See which requirements block the most forecast hours below.

71-hour requirements breakdown

When available, this detailed table covers only the stated 71-hour horizon (typically 72–168 hours, depending on available hourly data). Opportunity records above span the full 14-day forecast period, so this table does not explain that entire period. Times shown in Asia/Tokyo.

Requirements breakdown is temporarily unavailable or expired. This does not mean no opportunities.

Supporting forecast inputs

Additional hourly values for interpreting the forecast and any derived scores. See the separate requirements breakdown for rule logic; missing values are unavailable.

Forecast time (Asia/Tokyo)	Dew Point	Surface Temperature	Temperature	Time Window	Total Cloud Coverage	Vapor Pressure Deficit
Thu, Oct 8, 2026Sunrise 05:35 · Sunset 16:59
08:00	5.9°C	14°C	13°C	Unavailable	94%	0.52kPa
09:00	5.1°C	14°C	14°C	Unavailable	62%	0.66kPa
10:00	5.5°C	18°C	15°C	Unavailable	31%	0.83kPa
11:00	4.2°C	19°C	17°C	Unavailable	19%	1.1kPa
12:00	4.5°C	19°C	18°C	Unavailable	60%	1.2kPa
13:00	4.8°C	19°C	18°C	Unavailable	59%	1.2kPa
14:00	6.9°C	18°C	17°C	Unavailable	69%	0.99kPa
15:00	7.1°C	17°C	17°C	Unavailable	34%	0.93kPa
16:00	8.2°C	15°C	15°C	Unavailable	13%	0.66kPa
17:00 Night	7.7°C	9°C	12°C	Unavailable	18%	0.37kPa
18:00 Night	7.1°C	7.4°C	11°C	Unavailable	11%	0.28kPa
19:00 Night	7.1°C	6.8°C	9.1°C	Unavailable	4%	0.15kPa
20:00 Night	6.1°C	6.7°C	8.6°C	Unavailable	0%	0.18kPa
21:00 Night	5.2°C	6.7°C	8.5°C	Unavailable	0%	0.22kPa
22:00 Night	5.8°C	6.7°C	8.5°C	Unavailable	0%	0.19kPa
23:00 Night	6.2°C	6.3°C	8.2°C	Unavailable	0%	0.14kPa
Fri, Oct 9, 2026Sunrise 05:36 · Sunset 16:57
24:00 Night	6.1°C	5.7°C	7.8°C	Unavailable	1%	0.12kPa
01:00 Night	5.8°C	5.6°C	7.8°C	Unavailable	5%	0.14kPa
02:00 Night	6°C	6.1°C	8°C	Unavailable	9%	0.14kPa
03:00 Night	6.4°C	6.4°C	8.1°C	Unavailable	9%	0.12kPa
04:00 Night	6.6°C	6.5°C	8.3°C	Unavailable	8%	0.12kPa
05:00 Night	6.5°C	6.4°C	8.4°C	Unavailable	17%	0.13kPa
06:00	6.6°C	7.3°C	8.6°C	Unavailable	55%	0.15kPa
07:00	7.6°C	11°C	11°C	Unavailable	23%	0.28kPa
08:00	9.1°C	15°C	14°C	Unavailable	26%	0.41kPa
09:00	9.2°C	18°C	16°C	Unavailable	23%	0.63kPa
10:00	11°C	20°C	18°C	Unavailable	84%	0.75kPa
11:00	11°C	20°C	19°C	Unavailable	34%	0.86kPa
12:00	12°C	20°C	19°C	Unavailable	34%	0.83kPa
13:00	11°C	21°C	19°C	Unavailable	35%	0.94kPa
14:00	12°C	19°C	19°C	Unavailable	50%	0.82kPa
15:00	13°C	18°C	18°C	Unavailable	52%	0.61kPa
16:00	14°C	16°C	17°C	Unavailable	32%	0.31kPa
17:00 Night	13°C	13°C	15°C	Unavailable	28%	0.2kPa
18:00 Night	13°C	13°C	14°C	Unavailable	16%	0.11kPa
19:00 Night	12°C	12°C	13°C	Unavailable	23%	0.09kPa
20:00 Night	12°C	12°C	13°C	Unavailable	22%	0.07kPa
21:00 Night	11°C	11°C	12°C	Unavailable	27%	0.07kPa
22:00 Night	11°C	11°C	12°C	Unavailable	20%	0.07kPa
23:00 Night	11°C	11°C	11°C	Unavailable	18%	0.05kPa
Sat, Oct 10, 2026Sunrise 05:37 · Sunset 16:55
24:00 Night	11°C	10°C	11°C	Unavailable	23%	0.04kPa
01:00 Night	11°C	11°C	11°C	Unavailable	81%	0.04kPa
02:00 Night	11°C	11°C	12°C	Unavailable	85%	0.05kPa
03:00 Night	11°C	11°C	12°C	Unavailable	16%	0.07kPa
04:00 Night	11°C	11°C	11°C	Unavailable	42%	0.05kPa
05:00 Night	10°C	10°C	11°C	Unavailable	25%	0.05kPa
06:00	10°C	11°C	11°C	Unavailable	24%	0.05kPa
07:00	11°C	13°C	13°C	Unavailable	33%	0.12kPa
08:00	13°C	16°C	15°C	Unavailable	32%	0.24kPa
09:00	13°C	19°C	17°C	Unavailable	19%	0.5kPa
10:00	13°C	22°C	19°C	Unavailable	13%	0.72kPa
11:00	13°C	24°C	20°C	Unavailable	13%	0.89kPa
12:00	12°C	24°C	21°C	Unavailable	26%	1.1kPa
13:00	12°C	24°C	21°C	Unavailable	34%	1.2kPa
14:00	12°C	23°C	21°C	Unavailable	60%	1.1kPa
15:00	12°C	21°C	21°C	Unavailable	34%	1.1kPa
16:00	14°C	19°C	20°C	Unavailable	38%	0.66kPa
17:00 Night	13°C	13°C	17°C	Unavailable	59%	0.47kPa
18:00 Night	12°C	11°C	15°C	Unavailable	93%	0.29kPa
19:00 Night	12°C	11°C	14°C	Unavailable	84%	0.19kPa
20:00 Night	12°C	9.9°C	13°C	Unavailable	43%	0.13kPa
21:00 Night	11°C	8.9°C	12°C	Unavailable	86%	0.1kPa
22:00 Night	11°C	8.6°C	11°C	Unavailable	77%	0.08kPa
23:00 Night	10°C	8.1°C	11°C	Unavailable	100%	0.05kPa
Sun, Oct 11, 2026Sunrise 05:39 · Sunset 16:54
24:00 Night	9.7°C	8°C	10°C	Unavailable	99%	0.02kPa
01:00 Night	9.2°C	7.9°C	9.5°C	Unavailable	95%	0.02kPa
02:00 Night	9°C	7.8°C	9.1°C	Unavailable	75%	0.01kPa
03:00 Night	8.4°C	7.2°C	8.4°C	Unavailable	99%	0kPa
04:00 Night	8.2°C	6.9°C	8.2°C	Unavailable	97%	0kPa
05:00 Night	7.9°C	6.5°C	8°C	Unavailable	93%	0.01kPa
06:00	7.8°C	7°C	8.6°C	Unavailable	92%	0.06kPa
07:00	9°C	12°C	11°C	Unavailable	92%	0.16kPa

How this forecast is evaluated

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

Explore Morning Frost conditions across Japan →

Recorded match history

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

Last 30 days

recorded matching windows

Last 90 days

recorded matching windows

Last 365 days

recorded matching windows · 67% average confidence

Most frequent recorded start hour

05:00 local time, shared by 4 of 12 matches recorded in the last 365 days.

Most represented month

February, with 8 of 12 matches recorded in the last 365 days.

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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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 →

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