More Morning Frost in Trossachs & Loch Lomond

Rule Morning Frost

Morning Frost Forecast for Ben A'an, Trossachs & Loch Lomond

Callander, Scotland, United Kingdom

A rocky summit reached through forest overlooks Loch Katrine and Loch Achray, with Ben Venue forming the dominant ridge beyond.

Currently

Real-time conditions

Frost Probability

Soil Temperature11.3°C

Dew Point7.3°C (moderate dew point)

Wind Speed2.0m/s (calm conditions)

Cloud Cover36%

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 Speed64% of hours

How this forecast is evaluated

See which weather signals PhotoWeather uses to identify Morning Frost conditions across Trossachs & Loch Lomond. The requirements and hourly values below show how those signals apply at Ben A'an.

Explore Morning Frost conditions across Trossachs & Loch Lomond →

Recorded match history

Completed PhotoWeather forecast matches recorded for this exact rule at Ben A'an 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%	2m/s
07:00	✓	0%	1.8m/s
08:00	✕	0%	1.4m/s
09:00	✕	0%	1.2m/s
10:00	✕	0%	1.1m/s
11:00	✕	0%	0.98m/s
12:00	✕	0%	0.9m/s
13:00	✕	0%	1.2m/s
14:00	✕	0%	1.5m/s
15:00	✕	0%	1.9m/s
16:00	✕	0%	2.2m/s
17:00	✕	0%	2.2m/s
18:00	✕	0%	1.8m/s
19:00	✕	0%	1.7m/s
20:00	✕	0%	1.9m/s
21:00	✕	0%	2m/s
22:00	✕	0%	2.1m/s
23:00	✕	0%	2.1m/s
Sun, Aug 23
24:00	✕	0%	2m/s
01:00	✕	0%	1.9m/s
02:00	✕	0%	1.7m/s
03:00	✕	0%	1.7m/s
04:00	✕	0%	1.7m/s
05:00	✓	0%	1.7m/s
06:00	✓	0%	1.8m/s
07:00	✓	0%	1.8m/s
08:00	✕	0%	1.2m/s
09:00	✕	0%	1m/s
10:00	✕	0%	0.84m/s
11:00	✕	0%	0.88m/s
12:00	✕	0%	0.82m/s
13:00	✕	0%	0.92m/s
14:00	✕	0%	1.2m/s
15:00	✕	0%	1m/s
16:00	✕	0%	0.97m/s
17:00	✕	0%	0.93m/s
18:00	✕	0%	0.86m/s
19:00	✕	0%	0.8m/s
20:00	✕	0%	0.81m/s
21:00	✕	0%	0.76m/s
22:00	✕	0%	0.77m/s
23:00	✕	0%	0.9m/s
Mon, Aug 24
24:00	✕	0%	0.95m/s
01:00	✕	0%	0.43m/s
02:00	✕	0%	0.47m/s
03:00	✕	0%	0.61m/s
04:00	✕	0%	0.53m/s
05:00	✓	0%	0.73m/s
06:00	✓	0%	0.77m/s
07:00	✓	0%	0.77m/s
08:00	✕	0%	0.79m/s
09:00	✕	0%	1.1m/s
10:00	✕	0%	1.5m/s
11:00	✕	0%	1.9m/s
12:00	✕	0%	2.3m/s
13:00	✕	0%	2.6m/s
14:00	✕	0%	2.6m/s
15:00	✕	0%	2.7m/s
16:00	✕	0%	2.7m/s
17:00	✕	0%	2.7m/s
18:00	✕	0%	2.5m/s
19:00	✕	0%	1.9m/s
20:00	✕	0%	1.6m/s
21:00	✕	0%	1.8m/s
22:00	✕	0%	1.9m/s
23:00	✕	0%	1.8m/s
Tue, Aug 25
24:00	✕	0%	1.8m/s
01:00	✕	0%	1.9m/s
02:00	✕	0%	2.6m/s
03:00	✕	0%	3.3m/s
04:00	✕	0%	4.1m/s
05:00	✓	0%	4.2m/s
06:00	✓	0%	4.4m/s
07:00	✓	0%	4.5m/s
08:00	✕	0%	4.6m/s
09:00	✕	0%	4.7m/s
10:00	✕	0%	4.8m/s
11:00	✕	0%	4.6m/s
12:00	✕	0%	4.5m/s
13:00	✕	0%	4.3m/s
14:00	✕	0%	3.9m/s
15:00	✕	0%	3.6m/s
16:00	✕	0%	3.2m/s
17:00	✕	0%	3.2m/s
18:00	✕	0%	3.2m/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 06:01 Sunset 20:37
21:00 ☾	7.3°C	11°C	12°C	-	36%	0.37kPa
22:00 ☾	7.5°C	11°C	9.9°C	-	39%	0.18kPa
23:00 ☾	7.8°C	11°C	9.6°C	-	44%	0.14kPa
Sun, Aug 23 Sunrise 06:01 Sunset 20:37
24:00 ☾	7.8°C	11°C	9.7°C	-	58%	0.14kPa
01:00 ☾	7.8°C	11°C	9.7°C	-	76%	0.15kPa
02:00 ☾	7.8°C	11°C	10°C	-	98%	0.18kPa
03:00 ☾	7.7°C	11°C	10°C	-	77%	0.18kPa
04:00 ☾	7.4°C	11°C	9.5°C	-	56%	0.16kPa
05:00 ☾	7.1°C	11°C	8.7°C	-	54%	0.12kPa
06:00 ☾	6.8°C	10°C	7.9°C	-	14%	0.08kPa
07:00	6.8°C	10°C	8.4°C	-	32%	0.11kPa
08:00	7.8°C	10°C	11°C	-	43%	0.24kPa
09:00	8.2°C	10°C	13°C	-	38%	0.41kPa
10:00	8.4°C	11°C	15°C	-	5%	0.58kPa
11:00	8.5°C	11°C	16°C	-	5%	0.74kPa
12:00	8.3°C	11°C	17°C	-	20%	0.87kPa
13:00	8.4°C	11°C	18°C	-	61%	0.95kPa
14:00	7.9°C	12°C	18°C	-	88%	0.93kPa
15:00	7.9°C	12°C	17°C	-	98%	0.88kPa
16:00	10°C	12°C	16°C	-	100%	0.62kPa
17:00	11°C	12°C	16°C	-	99%	0.5kPa
18:00	11°C	12°C	16°C	-	88%	0.46kPa
19:00	11°C	12°C	15°C	-	78%	0.42kPa
20:00	9.8°C	12°C	13°C	-	70%	0.33kPa
21:00 ☾	9°C	12°C	12°C	-	86%	0.28kPa
22:00 ☾	8.9°C	12°C	12°C	-	94%	0.23kPa
23:00 ☾	8.5°C	12°C	11°C	-	94%	0.17kPa
Mon, Aug 24 Sunrise 06:03 Sunset 20:35
24:00 ☾	8.4°C	12°C	10°C	-	93%	0.16kPa
01:00 ☾	8°C	12°C	9.7°C	-	58%	0.13kPa
02:00 ☾	7.6°C	12°C	9.2°C	-	15%	0.11kPa
03:00 ☾	7.3°C	11°C	8.7°C	-	43%	0.1kPa
04:00 ☾	7.2°C	11°C	8.5°C	-	59%	0.1kPa
05:00 ☾	6.9°C	11°C	8.3°C	-	48%	0.1kPa
06:00 ☾	6.8°C	11°C	8.1°C	-	22%	0.1kPa
07:00	7.3°C	11°C	8.8°C	-	71%	0.11kPa
08:00	8.7°C	11°C	11°C	-	100%	0.19kPa
09:00	9.3°C	11°C	13°C	-	100%	0.3kPa
10:00	9.3°C	11°C	14°C	-	97%	0.44kPa
11:00	9.1°C	11°C	15°C	-	89%	0.6kPa
12:00	9°C	11°C	16°C	-	63%	0.71kPa
13:00	9.1°C	12°C	17°C	-	39%	0.79kPa
14:00	9°C	12°C	18°C	-	45%	0.88kPa
15:00	8.7°C	12°C	18°C	-	10%	0.96kPa
16:00	8.7°C	12°C	19°C	-	23%	1kPa
17:00	8.8°C	13°C	18°C	-	32%	0.99kPa
18:00	10°C	13°C	18°C	-	76%	0.78kPa
19:00	11°C	13°C	16°C	-	100%	0.52kPa
20:00	9.9°C	13°C	14°C	-	100%	0.41kPa
21:00 ☾	9.2°C	13°C	14°C	-	100%	0.41kPa
22:00 ☾	9.2°C	13°C	13°C	-	100%	0.36kPa
23:00 ☾	9.5°C	13°C	13°C	-	96%	0.3kPa
Tue, Aug 25 Sunrise 06:05 Sunset 20:32
24:00 ☾	9.6°C	13°C	12°C	-	100%	0.22kPa
01:00 ☾	9.6°C	12°C	11°C	-	100%	0.15kPa
02:00 ☾	9.8°C	13°C	12°C	-	100%	0.2kPa
03:00 ☾	10°C	13°C	13°C	-	100%	0.26kPa
04:00 ☾	10°C	13°C	14°C	-	100%	0.31kPa
05:00 ☾	11°C	13°C	14°C	-	100%	0.36kPa
06:00 ☾	11°C	13°C	15°C	-	100%	0.4kPa
07:00	11°C	13°C	16°C	-	100%	0.45kPa
08:00	11°C	13°C	16°C	-	99%	0.51kPa
09:00	11°C	13°C	16°C	-	98%	0.57kPa
10:00	11°C	14°C	17°C	-	96%	0.63kPa
11:00	11°C	14°C	16°C	-	76%	0.56kPa
12:00	11°C	14°C	16°C	-	55%	0.49kPa
13:00	11°C	14°C	15°C	-	35%	0.43kPa
14:00	11°C	14°C	14°C	-	28%	0.29kPa
15:00	10°C	14°C	12°C	-	21%	0.17kPa
16:00	9.7°C	14°C	11°C	-	14%	0.07kPa
17:00	9.7°C	13°C	11°C	-	42%	0.09kPa
18:00	9.6°C	13°C	11°C	-	70%	0.11kPa
19:00	9.5°C	13°C	11°C	-	97%	0.13kPa
20:00	9.5°C	13°C	11°C	-	98%	0.11kPa

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, 7:10 PM UTC

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