Rule Morning Frost

Morning Frost Forecast for Teijo, Southern Finland

Matildedal, Southwest Finland, Finland

Teijo combines quiet forest lakes, coastal wetlands, and old ironworks buildings around Mathildedal, with reeds and woodland reflected in calm water.

Currently

Real-time conditions

Frost Probability

Soil Temperature17.0°C

Dew Point5.1°C (moderate dew point)

Wind Speed4.3m/s (calm conditions)

Cloud Cover0%

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 (81-hour forecast)

Frost Probability100% of hours
Time Window88% of hours
Wind Speed82% 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 Teijo.

Explore Morning Frost conditions across Southern Finland →

Recorded match history

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

Last 30 days

recorded matching windows

Last 90 days

recorded matching windows

Last 365 days

recorded matching windows · 62% average confidence

Only 5 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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81-hour requirements breakdown

When available, the detailed table below covers only the stated 81-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 81 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
Tue, Aug 18
07:00	✓	0%	1.4m/s
08:00	✕	0%	1.7m/s
09:00	✕	0%	2.3m/s
10:00	✕	0%	2.6m/s
11:00	✕	0%	2.8m/s
12:00	✕	0%	3.8m/s
13:00	✕	0%	4.2m/s
14:00	✕	0%	4.5m/s
15:00	✕	0%	4.5m/s
16:00	✕	0%	4.4m/s
17:00	✕	0%	4.3m/s
18:00	✕	0%	3.7m/s
19:00	✕	0%	3.5m/s
20:00	✕	0%	2.8m/s
21:00	✕	0%	2.1m/s
22:00	✕	0%	2.1m/s
23:00	✕	0%	1.9m/s
Wed, Aug 19
24:00	✕	0%	1.7m/s
01:00	✕	0%	1.7m/s
02:00	✕	0%	1.7m/s
03:00	✕	0%	1.7m/s
04:00	✕	0%	1.7m/s
05:00	✓	0%	1.5m/s
06:00	✓	0%	1.5m/s
07:00	✓	0%	1.4m/s
08:00	✕	0%	1.4m/s
09:00	✕	0%	1.7m/s
10:00	✕	0%	1.8m/s
11:00	✕	0%	2.3m/s
12:00	✕	0%	3m/s
13:00	✕	0%	3.9m/s
14:00	✕	0%	4.5m/s
15:00	✕	0%	4.6m/s
16:00	✕	0%	4.5m/s
17:00	✕	0%	4.3m/s
18:00	✕	0%	4.1m/s
19:00	✕	0%	3.7m/s
20:00	✕	0%	2.6m/s
21:00	✕	0%	1.9m/s
22:00	✕	0%	1.8m/s
23:00	✕	0%	1.3m/s
Thu, Aug 20
24:00	✕	0%	1.1m/s
01:00	✕	0%	0.37m/s
02:00	✕	0%	1m/s
03:00	✕	0%	1.5m/s
04:00	✕	0%	1.7m/s
05:00	✓	0%	1.9m/s
06:00	✓	0%	1.9m/s
07:00	✓	0%	1.7m/s
08:00	✕	0%	1.4m/s
09:00	✕	0%	1.4m/s
10:00	✕	0%	1.6m/s
11:00	✕	0%	1.7m/s
12:00	✕	0%	1.7m/s
13:00	✕	0%	1.5m/s
14:00	✕	0%	1.4m/s
15:00	✕	0%	2.1m/s
16:00	✕	0%	3.1m/s
17:00	✕	0%	3.2m/s
18:00	✕	0%	2.9m/s
19:00	✕	0%	2.5m/s
20:00	✕	0%	2.1m/s
21:00	✕	0%	1.6m/s
22:00	✕	0%	1.7m/s
23:00	✕	0%	1.8m/s
Fri, Aug 21
24:00	✕	0%	1.3m/s
01:00	✕	0%	1.3m/s
02:00	✕	0%	1.5m/s
03:00	✕	0%	2m/s
04:00	✕	0%	4.3m/s
05:00	✓	0%	6.6m/s
06:00	✓	0%	8.9m/s
07:00	✓	0%	8m/s
08:00	✕	0%	7.1m/s
09:00	✕	0%	6.1m/s
10:00	✕	0%	6.1m/s
11:00	✕	0%	6.1m/s
12:00	✕	0%	6.1m/s
13:00	✕	0%	6.3m/s
14:00	✕	0%	6.5m/s
15:00	✕	0%	6.8m/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
Tue, Aug 18 Sunrise 05:49 Sunset 21:13
17:00	5.1°C	17°C	18°C	-	0%	1.2kPa
18:00	5.6°C	17°C	18°C	-	0%	1.1kPa
19:00	6.2°C	17°C	17°C	-	0%	0.96kPa
20:00	7.5°C	17°C	15°C	-	0%	0.71kPa
21:00	8.5°C	17°C	13°C	-	0%	0.37kPa
22:00 ☾	8.7°C	16°C	11°C	-	0%	0.23kPa
23:00 ☾	8.7°C	16°C	11°C	-	0%	0.18kPa
Wed, Aug 19 Sunrise 05:49 Sunset 21:13
24:00 ☾	8.5°C	15°C	11°C	-	0%	0.16kPa
01:00 ☾	8.2°C	15°C	10°C	-	0%	0.16kPa
02:00 ☾	7.9°C	14°C	9.8°C	-	0%	0.15kPa
03:00 ☾	7.7°C	14°C	9.5°C	-	0%	0.14kPa
04:00 ☾	7.5°C	14°C	9.1°C	-	1%	0.12kPa
05:00 ☾	7.4°C	13°C	8.9°C	-	3%	0.11kPa
06:00	7.3°C	13°C	8.6°C	-	5%	0.1kPa
07:00	7.3°C	12°C	9.8°C	-	5%	0.19kPa
08:00	7.3°C	12°C	12°C	-	5%	0.42kPa
09:00	7.1°C	13°C	15°C	-	5%	0.67kPa
10:00	6.2°C	13°C	17°C	-	5%	0.94kPa
11:00	5.5°C	13°C	18°C	-	5%	1.2kPa
12:00	5.2°C	14°C	19°C	-	5%	1.3kPa
13:00	5°C	14°C	19°C	-	30%	1.4kPa
14:00	4.9°C	15°C	20°C	-	39%	1.4kPa
15:00	4.8°C	15°C	19°C	-	14%	1.3kPa
16:00	4.6°C	16°C	19°C	-	3%	1.4kPa
17:00	3.9°C	16°C	19°C	-	3%	1.3kPa
18:00	3.5°C	16°C	18°C	-	5%	1.3kPa
19:00	4.4°C	16°C	17°C	-	5%	1.1kPa
20:00	5.7°C	16°C	15°C	-	6%	0.84kPa
21:00	6.5°C	16°C	12°C	-	27%	0.47kPa
22:00 ☾	7.1°C	15°C	11°C	-	47%	0.33kPa
23:00 ☾	7.1°C	15°C	11°C	-	53%	0.28kPa
Thu, Aug 20 Sunrise 05:51 Sunset 21:10
24:00 ☾	6.9°C	15°C	10°C	-	33%	0.27kPa
01:00 ☾	6.7°C	14°C	10°C	-	42%	0.27kPa
02:00 ☾	6.3°C	14°C	9.8°C	-	51%	0.26kPa
03:00 ☾	6.2°C	13°C	9.5°C	-	93%	0.24kPa
04:00 ☾	6°C	13°C	9.5°C	-	100%	0.25kPa
05:00 ☾	5.8°C	13°C	9.5°C	-	68%	0.26kPa
06:00	5.7°C	12°C	9.2°C	-	96%	0.25kPa
07:00	5.8°C	12°C	11°C	-	96%	0.35kPa
08:00	6.1°C	12°C	13°C	-	100%	0.53kPa
09:00	6.6°C	12°C	13°C	-	100%	0.5kPa
10:00	6.6°C	12°C	12°C	-	100%	0.47kPa
11:00	6.5°C	12°C	13°C	-	100%	0.54kPa
12:00	6.7°C	12°C	14°C	-	100%	0.58kPa
13:00	7.4°C	13°C	14°C	-	100%	0.57kPa
14:00	9°C	13°C	13°C	-	100%	0.34kPa
15:00	9.8°C	13°C	12°C	-	100%	0.17kPa
16:00	9.7°C	12°C	11°C	-	100%	0.13kPa
17:00	9.2°C	12°C	11°C	-	100%	0.13kPa
18:00	9.4°C	12°C	11°C	-	100%	0.1kPa
19:00	9.5°C	12°C	10°C	-	100%	0.08kPa
20:00	9.6°C	12°C	10°C	-	100%	0.07kPa
21:00	9.5°C	12°C	11°C	-	72%	0.09kPa
22:00 ☾	9.1°C	12°C	10°C	-	28%	0.09kPa
23:00 ☾	8.2°C	11°C	9°C	-	5%	0.06kPa
Fri, Aug 21 Sunrise 05:53 Sunset 21:08
24:00 ☾	7.8°C	11°C	8.7°C	-	5%	0.06kPa
01:00 ☾	7.9°C	11°C	8.9°C	-	5%	0.07kPa
02:00 ☾	7.9°C	11°C	9°C	-	5%	0.08kPa
03:00 ☾	8.4°C	11°C	9.5°C	-	5%	0.08kPa
04:00 ☾	9.8°C	3249°C	12°C	-	37%	0.15kPa
05:00 ☾	11°C	6487°C	14°C	-	68%	0.24kPa
06:00	13°C	9726°C	16°C	-	100%	0.35kPa
07:00	13°C	9726°C	16°C	-	97%	0.32kPa
08:00	13°C	9726°C	16°C	-	95%	0.3kPa
09:00	13°C	9726°C	15°C	-	92%	0.28kPa
10:00	13°C	9726°C	16°C	-	68%	0.28kPa
11:00	13°C	9726°C	16°C	-	44%	0.28kPa
12:00	13°C	9726°C	16°C	-	20%	0.28kPa
13:00	14°C	9726°C	16°C	-	16%	0.27kPa
14:00	14°C	9726°C	16°C	-	13%	0.25kPa
15:00	14°C	9726°C	16°C	-	10%	0.24kPa
16:00	14°C	9726°C	16°C	-	8%	0.28kPa

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 18, 2026, 1:27 PM UTC

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