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Rule Morning Frost

Morning Frost Forecast for Aulanko, Southern Finland

Hämeenlinna, Kanta-Häme, Finland

Aulanko’s wooded ridge overlooks Lake Vanajavesi, framing islands and farmland from above while smaller ponds provide intimate fog scenes.

Currently

Real-time conditions
Soil Temperature13.1°C
Dew Point10.9°C (moderate dew point)
Wind Speed3.8m/s (calm conditions)
Cloud Cover100%

Upcoming Opportunities

When all conditions match, PhotoWeather marks an opportunity window.

Times shown in Europe/Helsinki

No opportunities in the next 14 days

See which requirements block the most forecast hours below.

Most common blockers (95-hour forecast)

  • Frost Probability100% of hours
  • Time Window88% of hours
  • Wind Speed76% of hours

How this forecast is evaluated

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

Explore Morning Frost conditions across Southern Finland →

Recorded match history

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

Last 30 days
0
recorded matching windows
Last 90 days
0
recorded matching windows
Last 365 days
4
recorded matching windows · 75% average confidence

Only 4 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
Europe/Helsinki
Time Window
Sunrise -45m to +90m
Frost Probability
≥ 60.0%
Wind Speed
≤ 1.5m/s
Sat, Aug 22
22:000%3.5m/s
23:000%4.9m/s
Sun, Aug 23
24:000%5.4m/s
01:000%6.7m/s
02:000%7.5m/s
03:000%7.8m/s
04:000%8.2m/s
05:000%8.3m/s
06:000%8.3m/s
07:000%7.8m/s
08:000%7.7m/s
09:000%7.1m/s
10:000%6.9m/s
11:000%6.6m/s
12:000%6.6m/s
13:000%6.2m/s
14:000%6m/s
15:000%5.1m/s
16:000%4.9m/s
17:000%5.5m/s
18:000%5.2m/s
19:000%4.6m/s
20:000%4m/s
21:000%3.8m/s
22:000%3.7m/s
23:000%3.8m/s
Mon, Aug 24
24:000%3.9m/s
01:000%3.9m/s
02:000%3.8m/s
03:000%3.8m/s
04:000%3.9m/s
05:000%3.8m/s
06:000%3.6m/s
07:000%3.7m/s
08:000%3.8m/s
09:000%4.4m/s
10:000%4.9m/s
11:000%4.8m/s
12:000%4.9m/s
13:000%4.9m/s
14:000%4.9m/s
15:000%4.4m/s
16:000%4.3m/s
17:000%3.9m/s
18:000%3.8m/s
19:000%3.6m/s
20:000%3m/s
21:000%2.6m/s
22:000%2.4m/s
23:000%2.2m/s
Tue, Aug 25
24:000%2.6m/s
01:000%3m/s
02:000%2.9m/s
03:000%2.6m/s
04:000%2.3m/s
05:000%2.3m/s
06:000%2.3m/s
07:000%2.2m/s
08:000%2.8m/s
09:000%3.5m/s
10:000%3.6m/s
11:000%4.1m/s
12:000%4.3m/s
13:000%4.4m/s
14:000%4.3m/s
15:000%4.2m/s
16:000%3.7m/s
17:000%3.5m/s
18:000%2.7m/s
19:000%2.1m/s
20:000%1.5m/s
21:000%1.3m/s
22:000%1.3m/s
23:000%1.3m/s
Wed, Aug 26
24:000%0.86m/s
01:000%0.6m/s
02:000%0.57m/s
03:000%0.43m/s
04:000%0.94m/s
05:000%1.4m/s
06:000%2m/s
07:000%2.1m/s
08:000%2.2m/s
09:000%2.3m/s
10:000%2.1m/s
11:000%1.9m/s
12:000%1.7m/s
13:000%1.3m/s
14:000%0.97m/s
15:000%0.6m/s
16:000%0.42m/s
17:000%0.23m/s
18:000%0.04m/s
19:000%0.1m/s
20:000%0.16m/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
Europe/Helsinki
Dew Point
°C
Surface Temperature
°C
Temperature
°C
Time Window
Total Cloud Coverage
%
Vapor Pressure Deficit
kPa
Sun, Aug 23 Sunrise 05:51 Sunset 20:55
23:00
11°C 13°C 13°C - 100% 0.21kPa
Mon, Aug 24 Sunrise 05:51 Sunset 20:55
24:00
11°C 13°C 13°C - 100% 0.19kPa
01:00
11°C 13°C 13°C - 95% 0.17kPa
02:00
11°C 13°C 12°C - 90% 0.14kPa
03:00
11°C 13°C 12°C - 96% 0.1kPa
04:00
11°C 13°C 12°C - 100% 0.09kPa
05:00
11°C 13°C 12°C - 94% 0.07kPa
06:00
10°C 12°C 11°C - 92% 0.07kPa
07:00
10°C 12°C 12°C - 100% 0.11kPa
08:00
10°C 12°C 12°C - 99% 0.19kPa
09:00
10°C 12°C 14°C - 80% 0.31kPa
10:00
9.9°C 13°C 15°C - 59% 0.45kPa
11:00
9.8°C 13°C 16°C - 71% 0.56kPa
12:00
9.6°C 13°C 16°C - 58% 0.66kPa
13:00
9.2°C 13°C 17°C - 96% 0.78kPa
14:00
8.9°C 13°C 18°C - 44% 0.91kPa
15:00
8.4°C 14°C 18°C - 97% 1kPa
16:00
9.9°C 14°C 17°C - 87% 0.77kPa
17:00
10°C 14°C 17°C - 12% 0.73kPa
18:00
9.6°C 14°C 17°C - 32% 0.78kPa
19:00
9.5°C 14°C 17°C - 31% 0.7kPa
20:00
9.1°C 14°C 15°C - 96% 0.53kPa
21:00
9°C 14°C 13°C - 17% 0.34kPa
22:00
9°C 14°C 12°C - 56% 0.21kPa
23:00
9.2°C 14°C 11°C - 51% 0.18kPa
Tue, Aug 25 Sunrise 05:54 Sunset 20:52
24:00
9.6°C 14°C 12°C - 73% 0.17kPa
01:00
9.8°C 13°C 12°C - 23% 0.22kPa
02:00
9.6°C 13°C 11°C - 5% 0.14kPa
03:00
9.2°C 13°C 10°C - 5% 0.1kPa
04:00
9.1°C 13°C 9.6°C - 1% 0.04kPa
05:00
8.8°C 13°C 9.3°C - 6% 0.04kPa
06:00
8.3°C 12°C 9°C - 1% 0.05kPa
07:00
8.1°C 12°C 9.4°C - 9% 0.1kPa
08:00
8.3°C 12°C 12°C - 5% 0.27kPa
09:00
7.8°C 12°C 13°C - 5% 0.48kPa
10:00
7.5°C 12°C 15°C - 5% 0.69kPa
11:00
7.5°C 13°C 16°C - 5% 0.84kPa
12:00
7.7°C 13°C 18°C - 5% 0.96kPa
13:00
7.8°C 13°C 18°C - 26% 1.1kPa
14:00
7.8°C 14°C 19°C - 56% 1.2kPa
15:00
7.7°C 14°C 19°C - 94% 1.2kPa
16:00
8.3°C 14°C 19°C - 98% 1.1kPa
17:00
8.5°C 14°C 18°C - 100% 0.95kPa
18:00
9.1°C 14°C 18°C - 100% 0.93kPa
19:00
9.6°C 15°C 18°C - 100% 0.83kPa
20:00
9.9°C 15°C 15°C - 100% 0.52kPa
21:00
9.4°C 15°C 14°C - 100% 0.38kPa
22:00
9.3°C 14°C 13°C - 92% 0.31kPa
23:00
9.3°C 14°C 12°C - 5% 0.25kPa
Wed, Aug 26 Sunrise 05:56 Sunset 20:49
24:00
9.3°C 14°C 12°C - 5% 0.2kPa
01:00
9.1°C 14°C 11°C - 3% 0.19kPa
02:00
9°C 13°C 11°C - 26% 0.18kPa
03:00
9°C 13°C 11°C - 99% 0.19kPa
04:00
9.3°C 14°C 14°C - 99% 0.4kPa
05:00
9.2°C 14°C 16°C - 99% 0.67kPa
06:00
8.6°C 14°C 19°C - 99% 1kPa
07:00
8.6°C 14°C 19°C - 78% 1kPa
08:00
8.6°C 15°C 19°C - 56% 1.1kPa
09:00
8.6°C 15°C 19°C - 35% 1.1kPa
10:00
8.5°C 15°C 19°C - 41% 1.1kPa
11:00
8.3°C 15°C 20°C - 46% 1.2kPa
12:00
8.1°C 16°C 20°C - 52% 1.2kPa
13:00
8.4°C 16°C 19°C - 68% 1kPa
14:00
8.6°C 16°C 17°C - 84% 0.88kPa
15:00
8.7°C 16°C 16°C - 100% 0.73kPa
16:00
8.5°C 16°C 16°C - 100% 0.72kPa
17:00
8.3°C 16°C 16°C - 100% 0.72kPa
18:00
8.1°C 15°C 16°C - 100% 0.71kPa
19:00
8°C 15°C 16°C - 100% 0.7kPa
20:00
7.9°C 15°C 15°C - 100% 0.69kPa
21:00
7.8°C 15°C 15°C - 100% 0.68kPa
22:00
7.8°C 15°C 15°C - 100% 0.66kPa
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.

Forecast generated

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