Rule Morning Frost

Morning Frost Forecast for Nara, Japan

Nara, Nara, Japan

Nara's temple roofs, lantern-lined paths, and wooded parkland offer layered scenes, with deer adding scale and movement among old trees.

Currently

Real-time conditions

Frost Probability

Soil Temperature27.3°C

Dew Point23.0°C (high dew point)

Wind Speed0.4m/s (calm conditions)

Cloud Cover49%

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 Speed49% 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 Nara.

Explore Morning Frost conditions across Japan →

Recorded match history

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

Last 30 days

recorded matching windows

Last 90 days

recorded matching windows

Last 365 days

recorded matching window · 57% average confidence

Only 1 completed match is 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%	0.33m/s
05:00	✕	0%	0.38m/s
06:00	✕	0%	0.41m/s
07:00	✕	0%	0.39m/s
08:00	✕	0%	0.89m/s
09:00	✕	0%	1.2m/s
10:00	✕	0%	1.2m/s
11:00	✕	0%	1.3m/s
12:00	✕	0%	2m/s
13:00	✕	0%	2.8m/s
14:00	✕	0%	3.5m/s
15:00	✕	0%	3.9m/s
16:00	✕	0%	4m/s
17:00	✕	0%	3.8m/s
18:00	✕	0%	3.6m/s
19:00	✕	0%	2m/s
20:00	✕	0%	1.6m/s
21:00	✕	0%	1.1m/s
22:00	✕	0%	1.8m/s
23:00	✕	0%	1.6m/s
Sun, Aug 23
24:00	✕	0%	1.2m/s
01:00	✕	0%	0.88m/s
02:00	✕	0%	0.65m/s
03:00	✕	0%	0.22m/s
04:00	✕	0%	0.16m/s
05:00	✕	0%	0.44m/s
06:00	✕	0%	0.83m/s
07:00	✕	0%	0.04m/s
08:00	✕	0%	0.14m/s
09:00	✕	0%	0.74m/s
10:00	✕	0%	0.95m/s
11:00	✕	0%	1.3m/s
12:00	✕	0%	1.9m/s
13:00	✕	0%	2.8m/s
14:00	✕	0%	3.8m/s
15:00	✕	0%	4.3m/s
16:00	✕	0%	4.3m/s
17:00	✕	0%	4.5m/s
18:00	✕	0%	3.6m/s
19:00	✕	0%	3.7m/s
20:00	✕	0%	3.6m/s
21:00	✕	0%	3m/s
22:00	✕	0%	2.3m/s
23:00	✕	0%	2m/s
Mon, Aug 24
24:00	✕	0%	1.9m/s
01:00	✕	0%	1.7m/s
02:00	✕	0%	1.4m/s
03:00	✕	0%	1.2m/s
04:00	✕	0%	0.86m/s
05:00	✕	0%	0.03m/s
06:00	✕	0%	0.36m/s
07:00	✕	0%	0.18m/s
08:00	✕	0%	0.57m/s
09:00	✕	0%	1m/s
10:00	✕	0%	1.3m/s
11:00	✕	0%	1.7m/s
12:00	✕	0%	2.8m/s
13:00	✕	0%	3.2m/s
14:00	✕	0%	3.3m/s
15:00	✕	0%	3.9m/s
16:00	✕	0%	4m/s
17:00	✕	0%	4.1m/s
18:00	✕	0%	3.8m/s
19:00	✕	0%	2.2m/s
20:00	✕	0%	2.1m/s
21:00	✕	0%	1.9m/s
22:00	✕	0%	1.1m/s
23:00	✕	0%	1m/s
Tue, Aug 25
24:00	✕	0%	0.77m/s
01:00	✕	0%	0.9m/s
02:00	✕	0%	0.89m/s
03:00	✕	0%	0.96m/s
04:00	✕	0%	0.23m/s
05:00	✕	0%	0.48m/s
06:00	✕	0%	0.67m/s
07:00	✕	0%	0.48m/s
08:00	✕	0%	1.2m/s
09:00	✕	0%	0.68m/s
10:00	✕	0%	0.7m/s
11:00	✕	0%	0.73m/s
12:00	✕	0%	0.75m/s
13:00	✕	0%	1m/s
14:00	✕	0%	1.3m/s
15:00	✕	0%	1.6m/s
16:00	✕	0%	1.6m/s
17:00	✕	0%	1.6m/s
18:00	✕	0%	1.6m/s
19:00	✕	0%	1.7m/s
20:00	✕	0%	1.8m/s
21:00	✕	0%	2m/s
22:00	✕	0%	1.9m/s
23:00	✕	0%	1.9m/s
Wed, Aug 26
24:00	✕	0%	1.8m/s
01:00	✕	0%	1.4m/s
02:00	✕	0%	0.96m/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 05:22 Sunset 18:36
05:00 ☾	23°C	27°C	26°C	-	49%	0.47kPa
06:00 ☾	23°C	27°C	26°C	-	95%	0.52kPa
07:00 ☾	23°C	27°C	27°C	-	100%	0.82kPa
08:00 ☾	22°C	28°C	29°C	-	69%	1.2kPa
09:00	22°C	29°C	30°C	-	18%	1.8kPa
10:00	22°C	31°C	32°C	-	93%	2.3kPa
11:00	21°C	32°C	34°C	-	89%	2.7kPa
12:00	21°C	34°C	35°C	-	78%	3kPa
13:00	21°C	35°C	35°C	-	93%	3.3kPa
14:00	20°C	35°C	35°C	-	100%	3.4kPa
15:00	20°C	36°C	35°C	-	13%	3.4kPa
16:00	19°C	36°C	35°C	-	4%	3.3kPa
17:00	19°C	35°C	34°C	-	28%	3.1kPa
18:00	20°C	35°C	32°C	-	97%	2.5kPa
19:00 ☾	21°C	34°C	30°C	-	84%	1.9kPa
20:00 ☾	22°C	33°C	29°C	-	96%	1.5kPa
21:00 ☾	23°C	32°C	29°C	-	78%	1.3kPa
22:00 ☾	23°C	31°C	29°C	-	47%	1.1kPa
23:00 ☾	23°C	31°C	28°C	-	20%	1.1kPa
Mon, Aug 24 Sunrise 05:23 Sunset 18:35
24:00 ☾	23°C	30°C	28°C	-	0%	0.95kPa
01:00 ☾	23°C	30°C	27°C	-	0%	0.88kPa
02:00 ☾	23°C	29°C	27°C	-	6%	0.81kPa
03:00 ☾	23°C	29°C	27°C	-	11%	0.76kPa
04:00 ☾	23°C	29°C	27°C	-	13%	0.73kPa
05:00 ☾	23°C	28°C	26°C	-	13%	0.7kPa
06:00 ☾	23°C	28°C	27°C	-	9%	0.72kPa
07:00 ☾	23°C	28°C	27°C	-	28%	0.91kPa
08:00 ☾	23°C	29°C	29°C	-	49%	1.2kPa
09:00	23°C	30°C	31°C	-	59%	1.6kPa
10:00	23°C	31°C	32°C	-	68%	2kPa
11:00	22°C	32°C	33°C	-	92%	2.3kPa
12:00	22°C	33°C	33°C	-	99%	2.4kPa
13:00	22°C	33°C	32°C	-	56%	2.2kPa
14:00	21°C	33°C	33°C	-	36%	2.5kPa
15:00	21°C	34°C	33°C	-	30%	2.6kPa
16:00	21°C	34°C	33°C	-	28%	2.5kPa
17:00	22°C	34°C	32°C	-	9%	2.2kPa
18:00	22°C	33°C	31°C	-	8%	1.7kPa
19:00 ☾	23°C	32°C	29°C	-	28%	1.3kPa
20:00 ☾	23°C	31°C	28°C	-	8%	0.94kPa
21:00 ☾	24°C	31°C	28°C	-	12%	0.79kPa
22:00 ☾	24°C	30°C	27°C	-	59%	0.73kPa
23:00 ☾	24°C	30°C	27°C	-	95%	0.7kPa
Tue, Aug 25 Sunrise 05:23 Sunset 18:34
24:00 ☾	23°C	29°C	27°C	-	95%	0.68kPa
01:00 ☾	23°C	29°C	27°C	-	72%	0.64kPa
02:00 ☾	23°C	28°C	26°C	-	60%	0.62kPa
03:00 ☾	23°C	28°C	26°C	-	87%	0.58kPa
04:00 ☾	23°C	28°C	26°C	-	52%	0.55kPa
05:00 ☾	23°C	28°C	26°C	-	69%	0.53kPa
06:00 ☾	23°C	27°C	26°C	-	4%	0.55kPa
07:00 ☾	23°C	28°C	27°C	-	5%	0.75kPa
08:00 ☾	23°C	28°C	28°C	-	22%	1.1kPa
09:00	23°C	29°C	30°C	-	30%	1.5kPa
10:00	23°C	28°C	29°C	-	20%	1.1kPa
11:00	23°C	27°C	28°C	-	11%	0.84kPa
12:00	23°C	26°C	26°C	-	1%	0.57kPa
13:00	23°C	26°C	25°C	-	1%	0.42kPa
14:00	22°C	26°C	24°C	-	0%	0.29kPa
15:00	22°C	26°C	23°C	-	0%	0.17kPa
16:00	21°C	25°C	22°C	-	0%	0.19kPa
17:00	20°C	25°C	22°C	-	0%	0.22kPa
18:00	20°C	25°C	21°C	-	0%	0.24kPa
19:00 ☾	19°C	25°C	21°C	-	0%	0.27kPa
20:00 ☾	18°C	24°C	20°C	-	0%	0.29kPa
21:00 ☾	18°C	24°C	20°C	-	0%	0.31kPa
22:00 ☾	18°C	24°C	20°C	-	20%	0.28kPa
23:00 ☾	19°C	24°C	20°C	-	40%	0.26kPa
Wed, Aug 26 Sunrise 05:24 Sunset 18:32
24:00 ☾	19°C	23°C	21°C	-	61%	0.24kPa
01:00 ☾	20°C	23°C	23°C	-	74%	0.54kPa
02:00 ☾	21°C	24°C	26°C	-	87%	0.94kPa
03:00 ☾	21°C	24°C	29°C	-	100%	1.4kPa
04:00 ☾	21°C	24°C	30°C	-	94%	1.8kPa

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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