More Morning Frost in Trossachs & Loch Lomond

Rule Morning Frost

Morning Frost Forecast for Loch Lubnaig, Trossachs & Loch Lomond

Callander, Scotland, United Kingdom

A long, narrow loch fills a steep Highland glen, bordered by pebble shores, woodland and the slopes of Ben Ledi.

Currently

Real-time conditions

Frost Probability

Soil Temperature11.8°C

Dew Point6.5°C (moderate dew point)

Wind Speed2.1m/s (calm conditions)

Cloud Cover23%

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 Speed58% 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 Loch Lubnaig.

Explore Morning Frost conditions across Trossachs & Loch Lomond →

Recorded match history

Completed PhotoWeather forecast matches recorded for this exact rule at Loch Lubnaig 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%	1.6m/s
07:00	✓	0%	1.5m/s
08:00	✕	0%	1m/s
09:00	✕	0%	0.74m/s
10:00	✕	0%	0.43m/s
11:00	✕	0%	0.34m/s
12:00	✕	0%	0.71m/s
13:00	✕	0%	0.93m/s
14:00	✕	0%	1.4m/s
15:00	✕	0%	1.8m/s
16:00	✕	0%	2.6m/s
17:00	✕	0%	3.1m/s
18:00	✕	0%	2.3m/s
19:00	✕	0%	1.8m/s
20:00	✕	0%	2.1m/s
21:00	✕	0%	2.1m/s
22:00	✕	0%	2.1m/s
23:00	✕	0%	2m/s
Sun, Aug 23
24:00	✕	0%	1.8m/s
01:00	✕	0%	1.5m/s
02:00	✕	0%	1.3m/s
03:00	✕	0%	1.1m/s
04:00	✕	0%	1.2m/s
05:00	✓	0%	1.3m/s
06:00	✓	0%	1.5m/s
07:00	✓	0%	1.5m/s
08:00	✕	0%	1.1m/s
09:00	✕	0%	1m/s
10:00	✕	0%	1.2m/s
11:00	✕	0%	1.3m/s
12:00	✕	0%	1.3m/s
13:00	✕	0%	1.4m/s
14:00	✕	0%	1.7m/s
15:00	✕	0%	1.3m/s
16:00	✕	0%	0.92m/s
17:00	✕	0%	0.72m/s
18:00	✕	0%	0.78m/s
19:00	✕	0%	0.95m/s
20:00	✕	0%	1.1m/s
21:00	✕	0%	1.1m/s
22:00	✕	0%	1m/s
23:00	✕	0%	0.93m/s
Mon, Aug 24
24:00	✕	0%	0.78m/s
01:00	✕	0%	0.23m/s
02:00	✕	0%	0.37m/s
03:00	✕	0%	0.84m/s
04:00	✕	0%	0.84m/s
05:00	✓	0%	0.99m/s
06:00	✓	0%	1m/s
07:00	✓	0%	0.95m/s
08:00	✕	0%	0.84m/s
09:00	✕	0%	1.2m/s
10:00	✕	0%	1.4m/s
11:00	✕	0%	1.8m/s
12:00	✕	0%	2.2m/s
13:00	✕	0%	2.4m/s
14:00	✕	0%	2.7m/s
15:00	✕	0%	3.1m/s
16:00	✕	0%	3m/s
17:00	✕	0%	3.1m/s
18:00	✕	0%	3.2m/s
19:00	✕	0%	2.3m/s
20:00	✕	0%	1.8m/s
21:00	✕	0%	2.1m/s
22:00	✕	0%	2.2m/s
23:00	✕	0%	2m/s
Tue, Aug 25
24:00	✕	0%	2m/s
01:00	✕	0%	2m/s
02:00	✕	0%	2m/s
03:00	✕	0%	2m/s
04:00	✕	0%	2m/s
05:00	✓	0%	2.1m/s
06:00	✓	0%	2.2m/s
07:00	✓	0%	2.3m/s
08:00	✕	0%	2.4m/s
09:00	✕	0%	2.5m/s
10:00	✕	0%	2.5m/s
11:00	✕	0%	2.4m/s
12:00	✕	0%	2.2m/s
13:00	✕	0%	2.1m/s
14:00	✕	0%	2.2m/s
15:00	✕	0%	2.4m/s
16:00	✕	0%	2.5m/s
17:00	✕	0%	2.3m/s
18:00	✕	0%	2.1m/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 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 ☾	6.5°C	12°C	12°C	-	23%	0.39kPa
22:00 ☾	6.5°C	12°C	10°C	-	10%	0.27kPa
23:00 ☾	6.8°C	11°C	9.6°C	-	19%	0.2kPa
Sun, Aug 23 Sunrise 06:01 Sunset 20:37
24:00 ☾	6.9°C	11°C	9.4°C	-	49%	0.18kPa
01:00 ☾	6.8°C	11°C	9.2°C	-	96%	0.18kPa
02:00 ☾	6.9°C	11°C	10°C	-	71%	0.23kPa
03:00 ☾	6.9°C	11°C	10°C	-	57%	0.23kPa
04:00 ☾	7°C	11°C	9.8°C	-	60%	0.21kPa
05:00 ☾	6.9°C	11°C	9.2°C	-	59%	0.16kPa
06:00 ☾	6.8°C	11°C	8.2°C	-	18%	0.1kPa
07:00	7.1°C	11°C	8.8°C	-	14%	0.12kPa
08:00	8.1°C	11°C	11°C	-	37%	0.25kPa
09:00	8.4°C	11°C	13°C	-	41%	0.42kPa
10:00	8.6°C	11°C	15°C	-	6%	0.58kPa
11:00	8.6°C	11°C	16°C	-	5%	0.74kPa
12:00	8.3°C	11°C	17°C	-	7%	0.88kPa
13:00	8.1°C	12°C	18°C	-	33%	0.98kPa
14:00	7.9°C	12°C	18°C	-	61%	1kPa
15:00	8°C	12°C	18°C	-	75%	0.99kPa
16:00	9.1°C	13°C	18°C	-	83%	0.87kPa
17:00	10°C	13°C	17°C	-	83%	0.67kPa
18:00	11°C	13°C	17°C	-	72%	0.58kPa
19:00	11°C	13°C	16°C	-	72%	0.48kPa
20:00	10°C	13°C	14°C	-	89%	0.39kPa
21:00 ☾	9.5°C	13°C	14°C	-	95%	0.36kPa
22:00 ☾	9.5°C	13°C	13°C	-	95%	0.32kPa
23:00 ☾	9.4°C	13°C	13°C	-	86%	0.28kPa
Mon, Aug 24 Sunrise 06:03 Sunset 20:35
24:00 ☾	9°C	13°C	11°C	-	85%	0.2kPa
01:00 ☾	8.4°C	12°C	10°C	-	17%	0.13kPa
02:00 ☾	7.9°C	12°C	9.4°C	-	28%	0.11kPa
03:00 ☾	7.6°C	12°C	9°C	-	42%	0.1kPa
04:00 ☾	7.5°C	12°C	8.9°C	-	52%	0.1kPa
05:00 ☾	7.2°C	12°C	8.7°C	-	47%	0.11kPa
06:00 ☾	7.1°C	11°C	8.5°C	-	25%	0.1kPa
07:00	7.6°C	11°C	9.2°C	-	70%	0.12kPa
08:00	8.8°C	11°C	11°C	-	100%	0.21kPa
09:00	9.3°C	11°C	13°C	-	100%	0.31kPa
10:00	9.5°C	11°C	14°C	-	98%	0.45kPa
11:00	9.4°C	12°C	16°C	-	94%	0.6kPa
12:00	9.4°C	12°C	17°C	-	67%	0.71kPa
13:00	9.5°C	12°C	17°C	-	48%	0.81kPa
14:00	9.2°C	12°C	18°C	-	43%	0.9kPa
15:00	9°C	13°C	18°C	-	11%	0.97kPa
16:00	8.9°C	13°C	19°C	-	19%	1kPa
17:00	9.2°C	13°C	19°C	-	40%	0.98kPa
18:00	11°C	13°C	18°C	-	87%	0.74kPa
19:00	11°C	13°C	16°C	-	94%	0.51kPa
20:00	11°C	13°C	15°C	-	100%	0.39kPa
21:00 ☾	9.8°C	13°C	14°C	-	100%	0.37kPa
22:00 ☾	9.8°C	13°C	13°C	-	100%	0.3kPa
23:00 ☾	9.8°C	13°C	12°C	-	100%	0.22kPa
Tue, Aug 25 Sunrise 06:05 Sunset 20:32
24:00 ☾	9.7°C	13°C	11°C	-	100%	0.15kPa
01:00 ☾	9.4°C	13°C	10°C	-	100%	0.09kPa
02:00 ☾	9.2°C	12°C	11°C	-	100%	0.12kPa
03:00 ☾	8.9°C	11°C	11°C	-	100%	0.15kPa
04:00 ☾	8.6°C	10°C	11°C	-	100%	0.19kPa
05:00 ☾	9°C	10°C	11°C	-	100%	0.2kPa
06:00 ☾	9.5°C	11°C	12°C	-	100%	0.21kPa
07:00	9.9°C	11°C	12°C	-	100%	0.22kPa
08:00	9.6°C	11°C	13°C	-	100%	0.3kPa
09:00	9.3°C	11°C	14°C	-	100%	0.39kPa
10:00	8.9°C	11°C	14°C	-	100%	0.48kPa
11:00	9.2°C	11°C	14°C	-	75%	0.44kPa
12:00	9.6°C	11°C	14°C	-	50%	0.39kPa
13:00	9.9°C	11°C	14°C	-	25%	0.35kPa
14:00	9.1°C	11°C	12°C	-	27%	0.24kPa
15:00	8.2°C	11°C	10°C	-	28%	0.14kPa
16:00	7.2°C	11°C	8.1°C	-	29%	0.07kPa
17:00	7.5°C	11°C	8.4°C	-	51%	0.06kPa
18:00	7.9°C	11°C	8.7°C	-	73%	0.06kPa
19:00	8.2°C	10°C	9°C	-	95%	0.06kPa
20:00	8°C	10°C	8.7°C	-	97%	0.05kPa

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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