Rule Morning Frost

Morning Frost Forecast for Orkney Islands, Scotland

Kirkwall, Scotland, United Kingdom

Orkney combines low sea cliffs, wave-cut shores and Neolithic stone circles beneath broad northern skies, with long summer evenings extending coastal light.

Currently

Real-time conditions

Frost Probability

Soil Temperature9725.9°C

Dew Point11.6°C (moderate dew point)

Wind Speed7.0m/s (moderate winds)

Cloud Cover100%

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 (80-hour forecast)

Frost Probability100% of hours
Wind Speed100% of hours
Time Window83% of hours

How this forecast is evaluated

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

Explore Morning Frost conditions across Scotland →

Recorded match history

Completed PhotoWeather forecast matches recorded for this exact rule at Orkney Islands 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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80-hour requirements breakdown

When available, the detailed table below covers only the stated 80-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 80 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
Sun, Jul 19
05:00	✓	0%	7m/s
06:00	✓	0%	6.2m/s
07:00	✕	0%	5.7m/s
08:00	✕	0%	5.8m/s
09:00	✕	0%	5.7m/s
10:00	✕	0%	5.7m/s
11:00	✕	0%	6.1m/s
12:00	✕	0%	6.2m/s
13:00	✕	0%	6.5m/s
14:00	✕	0%	7m/s
15:00	✕	0%	7.3m/s
16:00	✕	0%	7.6m/s
17:00	✕	0%	7.8m/s
18:00	✕	0%	8.3m/s
19:00	✕	0%	8.6m/s
20:00	✕	0%	6.7m/s
21:00	✕	0%	5.8m/s
22:00	✕	0%	5.9m/s
23:00	✕	0%	5.4m/s
Mon, Jul 20
24:00	✕	0%	6m/s
01:00	✕	0%	6m/s
02:00	✕	0%	5.7m/s
03:00	✓	0%	5.6m/s
04:00	✓	0%	5.3m/s
05:00	✓	0%	5m/s
06:00	✓	0%	4.5m/s
07:00	✕	0%	4.2m/s
08:00	✕	0%	3.8m/s
09:00	✕	0%	4m/s
10:00	✕	0%	4.1m/s
11:00	✕	0%	3.5m/s
12:00	✕	0%	3.3m/s
13:00	✕	0%	3.7m/s
14:00	✕	0%	4.1m/s
15:00	✕	0%	4.1m/s
16:00	✕	0%	4.8m/s
17:00	✕	0%	5.7m/s
18:00	✕	0%	6.4m/s
19:00	✕	0%	6.7m/s
20:00	✕	0%	7.4m/s
21:00	✕	0%	7.7m/s
22:00	✕	0%	8.5m/s
23:00	✕	0%	8.4m/s
Tue, Jul 21
24:00	✕	0%	8.6m/s
01:00	✕	0%	8.6m/s
02:00	✕	0%	8.8m/s
03:00	✓	0%	9.3m/s
04:00	✓	0%	9.9m/s
05:00	✓	0%	10m/s
06:00	✓	0%	10m/s
07:00	✕	0%	11m/s
08:00	✕	0%	11m/s
09:00	✕	0%	11m/s
10:00	✕	0%	12m/s
11:00	✕	0%	13m/s
12:00	✕	0%	13m/s
13:00	✕	0%	13m/s
14:00	✕	0%	13m/s
15:00	✕	0%	13m/s
16:00	✕	0%	14m/s
17:00	✕	0%	14m/s
18:00	✕	0%	14m/s
19:00	✕	0%	14m/s
20:00	✕	0%	12m/s
21:00	✕	0%	10m/s
22:00	✕	0%	8.6m/s
23:00	✕	0%	8m/s
Wed, Jul 22
24:00	✕	0%	7.3m/s
01:00	✕	0%	6.7m/s
02:00	✕	0%	6.1m/s
03:00	✓	0%	5.5m/s
04:00	✓	0%	4.9m/s
05:00	✓	0%	4.8m/s
06:00	✓	0%	4.6m/s
07:00	✕	0%	4.5m/s
08:00	✕	0%	4.5m/s
09:00	✕	0%	4.5m/s
10:00	✕	0%	4.5m/s
11:00	✕	0%	4.1m/s
12:00	✕	0%	3.7m/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
Sun, Jul 19 Sunrise 04:32 Sunset 22:02
14:00	12°C	9726°C	13°C	-	100%	0.12kPa
15:00	12°C	9726°C	13°C	-	100%	0.12kPa
16:00	12°C	9726°C	13°C	-	100%	0.13kPa
17:00	12°C	9726°C	13°C	-	100%	0.12kPa
18:00	12°C	9726°C	13°C	-	100%	0.08kPa
19:00	12°C	9726°C	13°C	-	100%	0.07kPa
20:00	12°C	9726°C	13°C	-	98%	0.1kPa
21:00	12°C	9726°C	13°C	-	100%	0.11kPa
22:00	12°C	9726°C	13°C	-	100%	0.11kPa
23:00 ☾	12°C	9726°C	13°C	-	100%	0.12kPa
Mon, Jul 20 Sunrise 04:32 Sunset 22:02
24:00 ☾	12°C	9726°C	13°C	-	100%	0.11kPa
01:00 ☾	12°C	9726°C	13°C	-	100%	0.12kPa
02:00 ☾	11°C	9726°C	13°C	-	100%	0.13kPa
03:00 ☾	11°C	9726°C	13°C	-	100%	0.14kPa
04:00 ☾	11°C	9726°C	13°C	-	100%	0.15kPa
05:00	11°C	9726°C	13°C	-	100%	0.16kPa
06:00	11°C	9726°C	13°C	-	100%	0.17kPa
07:00	11°C	9726°C	13°C	-	100%	0.19kPa
08:00	11°C	9726°C	13°C	-	100%	0.2kPa
09:00	11°C	9726°C	13°C	-	100%	0.21kPa
10:00	11°C	9726°C	13°C	-	100%	0.22kPa
11:00	11°C	9726°C	13°C	-	100%	0.25kPa
12:00	10°C	9726°C	13°C	-	98%	0.25kPa
13:00	11°C	9726°C	13°C	-	99%	0.24kPa
14:00	11°C	9726°C	13°C	-	84%	0.23kPa
15:00	11°C	9726°C	13°C	-	74%	0.23kPa
16:00	11°C	9726°C	13°C	-	53%	0.21kPa
17:00	12°C	9726°C	13°C	-	17%	0.18kPa
18:00	12°C	9726°C	13°C	-	4%	0.17kPa
19:00	12°C	9726°C	13°C	-	60%	0.12kPa
20:00	12°C	9726°C	13°C	-	100%	0.1kPa
21:00	12°C	9726°C	13°C	-	100%	0.12kPa
22:00	12°C	9726°C	13°C	-	32%	0.11kPa
23:00 ☾	12°C	9726°C	13°C	-	5%	0.1kPa
Tue, Jul 21 Sunrise 04:34 Sunset 22:00
24:00 ☾	12°C	9726°C	13°C	-	5%	0.11kPa
01:00 ☾	12°C	9726°C	13°C	-	5%	0.12kPa
02:00 ☾	12°C	9726°C	13°C	-	5%	0.12kPa
03:00 ☾	12°C	9726°C	13°C	-	9%	0.11kPa
04:00 ☾	12°C	9726°C	13°C	-	30%	0.1kPa
05:00	12°C	9726°C	13°C	-	27%	0.1kPa
06:00	12°C	9726°C	13°C	-	29%	0.1kPa
07:00	12°C	9726°C	13°C	-	53%	0.11kPa
08:00	11°C	9726°C	13°C	-	100%	0.12kPa
09:00	11°C	9726°C	13°C	-	100%	0.15kPa
10:00	11°C	9726°C	13°C	-	5%	0.17kPa
11:00	11°C	9726°C	13°C	-	18%	0.17kPa
12:00	11°C	9726°C	13°C	-	73%	0.15kPa
13:00	11°C	9726°C	13°C	-	100%	0.13kPa
14:00	12°C	9726°C	13°C	-	100%	0.13kPa
15:00	11°C	9726°C	13°C	-	56%	0.13kPa
16:00	12°C	9726°C	13°C	-	33%	0.13kPa
17:00	12°C	9726°C	13°C	-	97%	0.13kPa
18:00	12°C	9726°C	13°C	-	100%	0.12kPa
19:00	12°C	9726°C	13°C	-	100%	0.11kPa
20:00	12°C	9726°C	13°C	-	100%	0.1kPa
21:00	12°C	9726°C	13°C	-	100%	0.1kPa
22:00 ☾	12°C	9726°C	13°C	-	100%	0.09kPa
23:00 ☾	12°C	9726°C	13°C	-	100%	0.1kPa
Wed, Jul 22 Sunrise 04:36 Sunset 21:58
24:00 ☾	12°C	9726°C	13°C	-	100%	0.11kPa
01:00 ☾	11°C	9726°C	13°C	-	100%	0.12kPa
02:00 ☾	11°C	9726°C	13°C	-	90%	0.14kPa
03:00 ☾	11°C	9726°C	13°C	-	80%	0.17kPa
04:00 ☾	11°C	9726°C	13°C	-	70%	0.19kPa
05:00	11°C	9726°C	13°C	-	57%	0.2kPa
06:00	11°C	9726°C	13°C	-	44%	0.2kPa
07:00	10°C	9726°C	13°C	-	31%	0.2kPa
08:00	11°C	9726°C	13°C	-	37%	0.2kPa
09:00	11°C	9726°C	13°C	-	43%	0.2kPa
10:00	11°C	9726°C	13°C	-	49%	0.19kPa
11:00	11°C	9726°C	13°C	-	66%	0.2kPa
12:00	10°C	9726°C	13°C	-	83%	0.21kPa
13:00	10°C	9726°C	13°C	-	99%	0.23kPa

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

Jul 19, 2026, 12:54 PM UTC

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