Rule Morning Frost

Morning Frost Forecast for Osaka, Japan

Osaka, Osaka, Japan

Osaka combines Dotonbori's illuminated canal and dense signs with castle walls, moats, and modern towers for contrasting urban compositions.

Currently

Real-time conditions

Frost Probability

Soil Temperature28.0°C

Dew Point22.8°C (high dew point)

Wind Speed1.1m/s (calm conditions)

Cloud Cover76%

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 Speed78% 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 Osaka.

Explore Morning Frost conditions across Japan →

Recorded match history

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

Last 30 days

recorded matching windows

Last 90 days

recorded matching windows

Last 365 days

recorded matching windows

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%	2m/s
05:00	✕	0%	1.5m/s
06:00	✕	0%	1.6m/s
07:00	✕	0%	1.8m/s
08:00	✕	0%	1.9m/s
09:00	✕	0%	2.1m/s
10:00	✕	0%	2.2m/s
11:00	✕	0%	2.8m/s
12:00	✕	0%	3.4m/s
13:00	✕	0%	3.8m/s
14:00	✕	0%	4.6m/s
15:00	✕	0%	5m/s
16:00	✕	0%	4.7m/s
17:00	✕	0%	4.5m/s
18:00	✕	0%	4.1m/s
19:00	✕	0%	3.6m/s
20:00	✕	0%	3.1m/s
21:00	✕	0%	3.2m/s
22:00	✕	0%	3.5m/s
23:00	✕	0%	3.3m/s
Sun, Aug 23
24:00	✕	0%	3m/s
01:00	✕	0%	2.6m/s
02:00	✕	0%	2.4m/s
03:00	✕	0%	1.9m/s
04:00	✕	0%	1.4m/s
05:00	✕	0%	1.1m/s
06:00	✕	0%	0.86m/s
07:00	✕	0%	1.2m/s
08:00	✕	0%	0.8m/s
09:00	✕	0%	1.1m/s
10:00	✕	0%	1.7m/s
11:00	✕	0%	2.7m/s
12:00	✕	0%	3.5m/s
13:00	✕	0%	4m/s
14:00	✕	0%	4.2m/s
15:00	✕	0%	4.2m/s
16:00	✕	0%	4.3m/s
17:00	✕	0%	5.1m/s
18:00	✕	0%	5.9m/s
19:00	✕	0%	6m/s
20:00	✕	0%	5.7m/s
21:00	✕	0%	4.9m/s
22:00	✕	0%	4.1m/s
23:00	✕	0%	3.7m/s
Mon, Aug 24
24:00	✕	0%	3.6m/s
01:00	✕	0%	3.2m/s
02:00	✕	0%	2.9m/s
03:00	✕	0%	2.3m/s
04:00	✕	0%	1.9m/s
05:00	✕	0%	1.4m/s
06:00	✕	0%	0.93m/s
07:00	✕	0%	1.2m/s
08:00	✕	0%	1.8m/s
09:00	✕	0%	2.4m/s
10:00	✕	0%	3m/s
11:00	✕	0%	4m/s
12:00	✕	0%	4.4m/s
13:00	✕	0%	4.1m/s
14:00	✕	0%	4.9m/s
15:00	✕	0%	5.1m/s
16:00	✕	0%	5m/s
17:00	✕	0%	5.3m/s
18:00	✕	0%	5.1m/s
19:00	✕	0%	4.4m/s
20:00	✕	0%	5m/s
21:00	✕	0%	4.2m/s
22:00	✕	0%	3.5m/s
23:00	✕	0%	2.8m/s
Tue, Aug 25
24:00	✕	0%	2.7m/s
01:00	✕	0%	3m/s
02:00	✕	0%	3.1m/s
03:00	✕	0%	2.9m/s
04:00	✕	0%	1.7m/s
05:00	✕	0%	0.88m/s
06:00	✕	0%	1.1m/s
07:00	✕	0%	0.76m/s
08:00	✕	0%	1.9m/s
09:00	✕	0%	1.4m/s
10:00	✕	0%	2.2m/s
11:00	✕	0%	2.9m/s
12:00	✕	0%	3.6m/s
13:00	✕	0%	2.9m/s
14:00	✕	0%	2.3m/s
15:00	✕	0%	1.6m/s
16:00	✕	0%	1.5m/s
17:00	✕	0%	1.4m/s
18:00	✕	0%	1.3m/s
19:00	✕	0%	1.6m/s
20:00	✕	0%	1.9m/s
21:00	✕	0%	2.2m/s
22:00	✕	0%	2.2m/s
23:00	✕	0%	2.2m/s
Wed, Aug 26
24:00	✕	0%	2.2m/s
01:00	✕	0%	1.6m/s
02:00	✕	0%	1.1m/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 05:23 Sunset 18:37
05:00 ☾	23°C	28°C	27°C	-	76%	0.71kPa
06:00 ☾	23°C	28°C	27°C	-	78%	0.76kPa
07:00 ☾	22°C	28°C	28°C	-	84%	1kPa
08:00 ☾	22°C	29°C	29°C	-	38%	1.3kPa
09:00	22°C	30°C	30°C	-	11%	1.7kPa
10:00	22°C	32°C	32°C	-	98%	2.1kPa
11:00	21°C	33°C	33°C	-	51%	2.4kPa
12:00	21°C	35°C	33°C	-	100%	2.6kPa
13:00	20°C	36°C	33°C	-	94%	2.8kPa
14:00	20°C	36°C	33°C	-	96%	2.8kPa
15:00	20°C	36°C	33°C	-	2%	2.9kPa
16:00	19°C	36°C	33°C	-	4%	2.9kPa
17:00	20°C	36°C	32°C	-	71%	2.6kPa
18:00	21°C	35°C	31°C	-	100%	2kPa
19:00 ☾	23°C	34°C	29°C	-	100%	1.4kPa
20:00 ☾	23°C	33°C	29°C	-	100%	1.1kPa
21:00 ☾	23°C	32°C	29°C	-	38%	1.1kPa
22:00 ☾	23°C	31°C	28°C	-	3%	1kPa
23:00 ☾	23°C	30°C	28°C	-	2%	1kPa
Mon, Aug 24 Sunrise 05:24 Sunset 18:36
24:00 ☾	23°C	30°C	28°C	-	0%	0.96kPa
01:00 ☾	23°C	30°C	28°C	-	4%	0.91kPa
02:00 ☾	23°C	29°C	27°C	-	0%	0.87kPa
03:00 ☾	23°C	29°C	27°C	-	0%	0.84kPa
04:00 ☾	23°C	29°C	27°C	-	0%	0.8kPa
05:00 ☾	23°C	28°C	27°C	-	0%	0.76kPa
06:00 ☾	23°C	28°C	27°C	-	0%	0.76kPa
07:00 ☾	23°C	28°C	28°C	-	6%	0.89kPa
08:00 ☾	23°C	29°C	29°C	-	36%	1.1kPa
09:00	23°C	30°C	30°C	-	33%	1.5kPa
10:00	23°C	32°C	31°C	-	42%	1.8kPa
11:00	22°C	33°C	32°C	-	31%	2kPa
12:00	22°C	34°C	32°C	-	13%	2.1kPa
13:00	22°C	35°C	33°C	-	4%	2.4kPa
14:00	22°C	36°C	33°C	-	3%	2.4kPa
15:00	22°C	36°C	32°C	-	2%	2.2kPa
16:00	22°C	36°C	32°C	-	5%	2.1kPa
17:00	23°C	35°C	31°C	-	6%	1.7kPa
18:00	23°C	34°C	30°C	-	7%	1.3kPa
19:00 ☾	23°C	33°C	29°C	-	51%	1.1kPa
20:00 ☾	23°C	32°C	28°C	-	70%	0.99kPa
21:00 ☾	23°C	31°C	28°C	-	99%	0.94kPa
22:00 ☾	23°C	31°C	28°C	-	100%	0.96kPa
23:00 ☾	23°C	30°C	28°C	-	94%	0.99kPa
Tue, Aug 25 Sunrise 05:25 Sunset 18:35
24:00 ☾	23°C	30°C	28°C	-	91%	0.99kPa
01:00 ☾	23°C	29°C	28°C	-	27%	0.92kPa
02:00 ☾	23°C	29°C	27°C	-	74%	0.85kPa
03:00 ☾	23°C	29°C	27°C	-	85%	0.8kPa
04:00 ☾	23°C	29°C	27°C	-	8%	0.8kPa
05:00 ☾	23°C	28°C	27°C	-	5%	0.83kPa
06:00 ☾	23°C	28°C	27°C	-	5%	0.86kPa
07:00 ☾	23°C	28°C	28°C	-	5%	1kPa
08:00 ☾	22°C	29°C	29°C	-	18%	1.2kPa
09:00	22°C	30°C	30°C	-	24%	1.5kPa
10:00	23°C	31°C	30°C	-	16%	1.4kPa
11:00	23°C	32°C	30°C	-	8%	1.3kPa
12:00	23°C	33°C	30°C	-	0%	1.3kPa
13:00	24°C	32°C	29°C	-	0%	1kPa
14:00	24°C	31°C	28°C	-	0%	0.82kPa
15:00	24°C	30°C	27°C	-	0%	0.63kPa
16:00	24°C	30°C	27°C	-	0%	0.6kPa
17:00	24°C	29°C	27°C	-	0%	0.56kPa
18:00	24°C	29°C	27°C	-	0%	0.53kPa
19:00 ☾	24°C	28°C	26°C	-	2%	0.51kPa
20:00 ☾	23°C	28°C	26°C	-	3%	0.49kPa
21:00 ☾	23°C	28°C	25°C	-	5%	0.47kPa
22:00 ☾	22°C	27°C	25°C	-	36%	0.59kPa
23:00 ☾	21°C	27°C	25°C	-	68%	0.7kPa
Wed, Aug 26 Sunrise 05:25 Sunset 18:34
24:00 ☾	20°C	26°C	25°C	-	99%	0.81kPa
01:00 ☾	20°C	27°C	26°C	-	100%	1.1kPa
02:00 ☾	20°C	28°C	28°C	-	100%	1.5kPa
03:00 ☾	20°C	28°C	30°C	-	100%	2kPa
04:00 ☾	20°C	30°C	31°C	-	99%	2.1kPa

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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