Rule Morning Frost

Morning Frost Forecast for Pen-y-ghent, Yorkshire Dales

Horton in Ribblesdale, England, United Kingdom

A steep-sided, flat-topped summit rises above Ribblesdale, with exposed gritstone, stone walls and views to the other Three Peaks.

Currently

Real-time conditions

Frost Probability

Soil Temperature11.5°C

Dew Point7.9°C (moderate dew point)

Wind Speed0.7m/s (calm conditions)

Cloud Cover19%

Upcoming Opportunities

When all conditions match, PhotoWeather marks an opportunity window.

Times shown in Europe/London

No opportunities in the next 14 days

See which requirements block the most forecast hours below.

Most common blockers (85-hour forecast)

Frost Probability100% of hours
Time Window88% of hours
Wind Speed67% of hours

How this forecast is evaluated

See which weather signals PhotoWeather uses to identify Morning Frost conditions across Yorkshire Dales. The requirements and hourly values below show how those signals apply at Pen-y-ghent.

Explore Morning Frost conditions across Yorkshire Dales →

Recorded match history

Completed PhotoWeather forecast matches recorded for this exact rule at Pen-y-ghent 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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85-hour requirements breakdown

When available, the detailed table below covers only the stated 85-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 85 hours

AND logic: all conditions required

Meets requirement

Misses requirement

Time Europe/London	Time Window Sunrise -45m to +90m	Frost Probability ≥ 60.0%	Wind Speed ≤ 1.5m/s
Sat, Aug 22
06:00	✓	0%	0.59m/s
07:00	✓	0%	0.29m/s
08:00	✕	0%	0.25m/s
09:00	✕	0%	0.73m/s
10:00	✕	0%	1.3m/s
11:00	✕	0%	1.9m/s
12:00	✕	0%	2.5m/s
13:00	✕	0%	2.6m/s
14:00	✕	0%	3.7m/s
15:00	✕	0%	4.1m/s
16:00	✕	0%	3.4m/s
17:00	✕	0%	3.3m/s
18:00	✕	0%	3.3m/s
19:00	✕	0%	2.2m/s
20:00	✕	0%	1.4m/s
21:00	✕	0%	0.73m/s
22:00	✕	0%	0.23m/s
23:00	✕	0%	0.17m/s
Sun, Aug 23
24:00	✕	0%	0.26m/s
01:00	✕	0%	0.28m/s
02:00	✕	0%	0.25m/s
03:00	✕	0%	0.28m/s
04:00	✕	0%	0.5m/s
05:00	✓	0%	0.59m/s
06:00	✓	0%	0.55m/s
07:00	✓	0%	0.56m/s
08:00	✕	0%	0.58m/s
09:00	✕	0%	0.85m/s
10:00	✕	0%	0.6m/s
11:00	✕	0%	0.31m/s
12:00	✕	0%	0.54m/s
13:00	✕	0%	0.71m/s
14:00	✕	0%	0.78m/s
15:00	✕	0%	0.66m/s
16:00	✕	0%	0.82m/s
17:00	✕	0%	0.76m/s
18:00	✕	0%	0.6m/s
19:00	✕	0%	0.8m/s
20:00	✕	0%	2m/s
21:00	✕	0%	3.3m/s
22:00	✕	0%	2.2m/s
23:00	✕	0%	2m/s
Mon, Aug 24
24:00	✕	0%	2m/s
01:00	✕	0%	1.9m/s
02:00	✕	0%	1.9m/s
03:00	✕	0%	1.9m/s
04:00	✕	0%	1.8m/s
05:00	✓	0%	1.8m/s
06:00	✓	0%	1.8m/s
07:00	✓	0%	1.7m/s
08:00	✕	0%	1.7m/s
09:00	✕	0%	2.1m/s
10:00	✕	0%	2.9m/s
11:00	✕	0%	4.4m/s
12:00	✕	0%	4.9m/s
13:00	✕	0%	5.1m/s
14:00	✕	0%	5.3m/s
15:00	✕	0%	5.4m/s
16:00	✕	0%	5.7m/s
17:00	✕	0%	5.8m/s
18:00	✕	0%	5.9m/s
19:00	✕	0%	6m/s
20:00	✕	0%	5.8m/s
21:00	✕	0%	5m/s
22:00	✕	0%	5m/s
23:00	✕	0%	4.7m/s
Tue, Aug 25
24:00	✕	0%	5.3m/s
01:00	✕	0%	5.1m/s
02:00	✕	0%	6m/s
03:00	✕	0%	6.9m/s
04:00	✕	0%	7.8m/s
05:00	✓	0%	7.6m/s
06:00	✓	0%	7.4m/s
07:00	✓	0%	7.2m/s
08:00	✕	0%	7.4m/s
09:00	✕	0%	7.5m/s
10:00	✕	0%	7.7m/s
11:00	✕	0%	7.6m/s
12:00	✕	0%	7.5m/s
13:00	✕	0%	7.4m/s
14:00	✕	0%	7.5m/s
15:00	✕	0%	7.7m/s
16:00	✕	0%	7.8m/s
17:00	✕	0%	6.6m/s
18:00	✕	0%	5.5m/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/London	Dew Point °C	Surface Temperature °C	Temperature °C	Time Window	Total Cloud Coverage %	Vapor Pressure Deficit kPa
Sat, Aug 22 Sunrise 05:59 Sunset 20:23
21:00 ☾	7.9°C	11°C	9.5°C	-	19%	0.12kPa
22:00 ☾	7.5°C	11°C	8.9°C	-	13%	0.1kPa
23:00 ☾	7°C	11°C	8.4°C	-	4%	0.09kPa
Sun, Aug 23 Sunrise 05:59 Sunset 20:23
24:00 ☾	6.7°C	11°C	8°C	-	5%	0.09kPa
01:00 ☾	6.4°C	11°C	7.6°C	-	5%	0.09kPa
02:00 ☾	6.1°C	10°C	7.5°C	-	2%	0.09kPa
03:00 ☾	5.9°C	10°C	7.3°C	-	5%	0.09kPa
04:00 ☾	5.7°C	10°C	7.1°C	-	6%	0.09kPa
05:00 ☾	5.4°C	9.9°C	7°C	-	5%	0.1kPa
06:00 ☾	5.2°C	9.7°C	6.8°C	-	5%	0.1kPa
07:00	6°C	9.5°C	7.9°C	-	5%	0.12kPa
08:00	7.6°C	9.5°C	10°C	-	6%	0.21kPa
09:00	8.2°C	9.7°C	12°C	-	5%	0.32kPa
10:00	8.3°C	9.9°C	14°C	-	5%	0.48kPa
11:00	7.7°C	10°C	15°C	-	5%	0.67kPa
12:00	7.4°C	11°C	16°C	-	5%	0.83kPa
13:00	7.1°C	11°C	17°C	-	8%	0.95kPa
14:00	7.1°C	12°C	18°C	-	6%	1kPa
15:00	7°C	12°C	18°C	-	20%	1.1kPa
16:00	6.7°C	12°C	18°C	-	17%	1.1kPa
17:00	6.7°C	13°C	18°C	-	32%	1.1kPa
18:00	7.5°C	13°C	18°C	-	46%	0.97kPa
19:00	9.1°C	13°C	16°C	-	57%	0.67kPa
20:00	7.1°C	13°C	14°C	-	82%	0.55kPa
21:00 ☾	5.8°C	13°C	12°C	-	100%	0.48kPa
22:00 ☾	5.6°C	13°C	9.7°C	-	100%	0.29kPa
23:00 ☾	5.9°C	12°C	9.2°C	-	92%	0.23kPa
Mon, Aug 24 Sunrise 06:01 Sunset 20:21
24:00 ☾	5.9°C	12°C	8.8°C	-	52%	0.21kPa
01:00 ☾	5.7°C	12°C	8.6°C	-	43%	0.2kPa
02:00 ☾	5.5°C	12°C	8.3°C	-	11%	0.19kPa
03:00 ☾	5.3°C	11°C	8°C	-	5%	0.18kPa
04:00 ☾	5.3°C	11°C	7.8°C	-	18%	0.16kPa
05:00 ☾	5.3°C	11°C	7.6°C	-	64%	0.15kPa
06:00 ☾	5.4°C	11°C	7.4°C	-	74%	0.14kPa
07:00	6.4°C	11°C	8.6°C	-	64%	0.16kPa
08:00	7.9°C	11°C	11°C	-	69%	0.26kPa
09:00	8.7°C	11°C	13°C	-	28%	0.4kPa
10:00	8.7°C	11°C	15°C	-	23%	0.56kPa
11:00	8.2°C	11°C	16°C	-	5%	0.71kPa
12:00	7.6°C	11°C	17°C	-	5%	0.84kPa
13:00	7.2°C	12°C	17°C	-	5%	0.95kPa
14:00	7°C	12°C	18°C	-	10%	1kPa
15:00	7.2°C	12°C	18°C	-	49%	1.1kPa
16:00	7.4°C	13°C	18°C	-	100%	1.1kPa
17:00	8.4°C	13°C	18°C	-	100%	0.94kPa
18:00	8.9°C	13°C	17°C	-	100%	0.75kPa
19:00	8.5°C	13°C	15°C	-	100%	0.57kPa
20:00	8.4°C	13°C	13°C	-	100%	0.41kPa
21:00 ☾	8.9°C	13°C	11°C	-	100%	0.21kPa
22:00 ☾	9.6°C	13°C	11°C	-	61%	0.09kPa
23:00 ☾	9.9°C	13°C	10°C	-	90%	0.05kPa
Tue, Aug 25 Sunrise 06:02 Sunset 20:18
24:00 ☾	10°C	13°C	11°C	-	100%	0.05kPa
01:00 ☾	11°C	12°C	11°C	-	99%	0.07kPa
02:00 ☾	11°C	13°C	13°C	-	73%	0.21kPa
03:00 ☾	11°C	13°C	14°C	-	48%	0.37kPa
04:00 ☾	10°C	13°C	16°C	-	22%	0.57kPa
05:00 ☾	10°C	14°C	17°C	-	25%	0.73kPa
06:00 ☾	10°C	14°C	19°C	-	29%	0.92kPa
07:00	10°C	14°C	20°C	-	32%	1.1kPa
08:00	9.9°C	15°C	21°C	-	54%	1.2kPa
09:00	9.8°C	15°C	21°C	-	76%	1.3kPa
10:00	9.7°C	15°C	21°C	-	98%	1.3kPa
11:00	10°C	15°C	20°C	-	99%	1.1kPa
12:00	10°C	16°C	19°C	-	99%	0.92kPa
13:00	10°C	16°C	18°C	-	100%	0.76kPa
14:00	11°C	16°C	17°C	-	100%	0.56kPa
15:00	12°C	16°C	16°C	-	100%	0.39kPa
16:00	12°C	15°C	15°C	-	100%	0.24kPa
17:00	12°C	15°C	14°C	-	100%	0.23kPa
18:00	12°C	15°C	14°C	-	100%	0.23kPa
19:00	11°C	15°C	14°C	-	100%	0.22kPa
20:00	12°C	15°C	14°C	-	100%	0.21kPa

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, 7:12 PM UTC

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