Rule
Morning Frost
Morning Frost Forecast for Cairngorms, Scotland
Aviemore, Scotland, United Kingdom
Cairngorms compositions range from granite plateaus and Scots pine forest to lochs and broad glens, often simplified by winter snow or low cloud.
1 matching opportunities in the 14-day forecast.
Hourly forecast scores
Forecast valid from Oct 22, 2026, 9:00 PM UTC (one hour; not an observation)Soil Temperature1.7°C
Dew Point1.7°C
Wind Speed2.1m/s
Cloud Cover0%
Upcoming Opportunities
When all conditions match, PhotoWeather marks an opportunity window.
Times shown in Europe/London
First upcoming window
Light Frost at Sunrise
Cairngorms
Fri, Oct 23 · 07:21–08:00 · 1h window
Medium confidence
55%
❄️Frost Probability64%
Soil Temperature: -0.6°C
Dew Point: -0.4°C (low dew point)
Wind Speed: 1.0m/s (calm conditions)
Cloud Cover: 46%
72-hour requirements breakdown
When available, this detailed table covers only the stated 72-hour horizon (typically 72–168 hours, depending on available hourly data). Opportunity records above span the full 14-day forecast period, so this table does not explain that entire period. Times shown in Europe/London.
Most common blockers
Ranked across the 89-hour forecast horizon, not the full opportunity period.
- Frost Probability89% of hours
- Time Window88% of hours
- Wind Speed72% of 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 |
|---|---|---|---|
| Thu, Oct 22 | |||
| Rule fails. 22:00 | Time Window: No. Misses requirement | Frost Probability: 59%. Misses requirement | Wind Speed: 2.1m/s. Misses requirement |
| Rule fails. 23:00 | Time Window: No. Misses requirement | Frost Probability: 59%. Misses requirement | Wind Speed: 2m/s. Misses requirement |
| Fri, Oct 23 | |||
| Rule fails. 24:00 | Time Window: No. Misses requirement | Frost Probability: 68%. Meets requirement | Wind Speed: 1.8m/s. Misses requirement |
| Rule fails. 01:00 | Time Window: No. Misses requirement | Frost Probability: 68%. Meets requirement | Wind Speed: 1.8m/s. Misses requirement |
| Rule fails. 02:00 | Time Window: No. Misses requirement | Frost Probability: 74%. Meets requirement | Wind Speed: 1.2m/s. Meets requirement |
| Rule fails. 03:00 | Time Window: No. Misses requirement | Frost Probability: 75%. Meets requirement | Wind Speed: 1m/s. Meets requirement |
| Rule fails. 04:00 | Time Window: No. Misses requirement | Frost Probability: 63%. Meets requirement | Wind Speed: 0.2m/s. Meets requirement |
| Rule fails. 05:00 | Time Window: No. Misses requirement | Frost Probability: 57%. Misses requirement | Wind Speed: 1.1m/s. Meets requirement |
| Rule fails. 06:00 | Time Window: No. Misses requirement | Frost Probability: 57%. Misses requirement | Wind Speed: 1.3m/s. Meets requirement |
| Rule passes. 07:00 | Time Window: Yes. Meets requirement | Frost Probability: 64%. Meets requirement | Wind Speed: 1m/s. Meets requirement |
| Rule fails. 08:00 | Time Window: Yes. Meets requirement | Frost Probability: 46%. Misses requirement | Wind Speed: 1.1m/s. Meets requirement |
| Rule fails. 09:00 | Time Window: Yes. Meets requirement | Frost Probability: 33%. Misses requirement | Wind Speed: 1.6m/s. Misses requirement |
| Rule fails. 10:00 | Time Window: No. Misses requirement | Frost Probability: 24%. Misses requirement | Wind Speed: 1.7m/s. Misses requirement |
| Rule fails. 11:00 | Time Window: No. Misses requirement | Frost Probability: 24%. Misses requirement | Wind Speed: 0.4m/s. Meets requirement |
| Rule fails. 12:00 | Time Window: No. Misses requirement | Frost Probability: 2.3%. Misses requirement | Wind Speed: 0.2m/s. Meets requirement |
| Rule fails. 13:00 | Time Window: No. Misses requirement | Frost Probability: 1.8%. Misses requirement | Wind Speed: 1.5m/s. Meets requirement |
| Rule fails. 14:00 | Time Window: No. Misses requirement | Frost Probability: 1.8%. Misses requirement | Wind Speed: 0.9m/s. Meets requirement |
| Rule fails. 15:00 | Time Window: No. Misses requirement | Frost Probability: 21%. Misses requirement | Wind Speed: 0.7m/s. Meets requirement |
| Rule fails. 16:00 | Time Window: No. Misses requirement | Frost Probability: 16%. Misses requirement | Wind Speed: 4.8m/s. Misses requirement |
| Rule fails. 17:00 | Time Window: No. Misses requirement | Frost Probability: 18%. Misses requirement | Wind Speed: 3.6m/s. Misses requirement |
| Rule fails. 18:00 | Time Window: No. Misses requirement | Frost Probability: 20%. Misses requirement | Wind Speed: 1.9m/s. Misses requirement |
| Rule fails. 19:00 | Time Window: No. Misses requirement | Frost Probability: 21%. Misses requirement | Wind Speed: 0.6m/s. Meets requirement |
| Rule fails. 20:00 | Time Window: No. Misses requirement | Frost Probability: 21%. Misses requirement | Wind Speed: 0.3m/s. Meets requirement |
| Rule fails. 21:00 | Time Window: No. Misses requirement | Frost Probability: 24%. Misses requirement | Wind Speed: 0.6m/s. Meets requirement |
| Rule fails. 22:00 | Time Window: No. Misses requirement | Frost Probability: 24%. Misses requirement | Wind Speed: 0.3m/s. Meets requirement |
| Rule fails. 23:00 | Time Window: No. Misses requirement | Frost Probability: 24%. Misses requirement | Wind Speed: 0.8m/s. Meets requirement |
| Sat, Oct 24 | |||
| Rule fails. 24:00 | Time Window: No. Misses requirement | Frost Probability: 26%. Misses requirement | Wind Speed: 0.8m/s. Meets requirement |
| Rule fails. 01:00 | Time Window: No. Misses requirement | Frost Probability: 24%. Misses requirement | Wind Speed: 1.1m/s. Meets requirement |
| Rule fails. 02:00 | Time Window: No. Misses requirement | Frost Probability: 29%. Misses requirement | Wind Speed: 2.1m/s. Misses requirement |
| Rule fails. 03:00 | Time Window: No. Misses requirement | Frost Probability: 35%. Misses requirement | Wind Speed: 2.9m/s. Misses requirement |
| Rule fails. 04:00 | Time Window: No. Misses requirement | Frost Probability: 47%. Misses requirement | Wind Speed: 2.9m/s. Misses requirement |
| Rule fails. 05:00 | Time Window: No. Misses requirement | Frost Probability: 59%. Misses requirement | Wind Speed: 2.8m/s. Misses requirement |
| Rule fails. 06:00 | Time Window: No. Misses requirement | Frost Probability: 67%. Meets requirement | Wind Speed: 2.6m/s. Misses requirement |
| Rule fails. 07:00 | Time Window: Yes. Meets requirement | Frost Probability: 66%. Meets requirement | Wind Speed: 2.5m/s. Misses requirement |
| Rule fails. 08:00 | Time Window: Yes. Meets requirement | Frost Probability: 55%. Misses requirement | Wind Speed: 2.2m/s. Misses requirement |
| Rule fails. 09:00 | Time Window: Yes. Meets requirement | Frost Probability: 39%. Misses requirement | Wind Speed: 2.2m/s. Misses requirement |
| Rule fails. 10:00 | Time Window: No. Misses requirement | Frost Probability: 32%. Misses requirement | Wind Speed: 0.9m/s. Meets requirement |
| Rule fails. 11:00 | Time Window: No. Misses requirement | Frost Probability: 20%. Misses requirement | Wind Speed: 1.8m/s. Misses requirement |
| Rule fails. 12:00 | Time Window: No. Misses requirement | Frost Probability: 29%. Misses requirement | Wind Speed: 4.4m/s. Misses requirement |
| Rule fails. 13:00 | Time Window: No. Misses requirement | Frost Probability: 31%. Misses requirement | Wind Speed: 3.4m/s. Misses requirement |
| Rule fails. 14:00 | Time Window: No. Misses requirement | Frost Probability: 27%. Misses requirement | Wind Speed: 6.5m/s. Misses requirement |
| Rule fails. 15:00 | Time Window: No. Misses requirement | Frost Probability: 1.3%. Misses requirement | Wind Speed: 8.5m/s. Misses requirement |
| Rule fails. 16:00 | Time Window: No. Misses requirement | Frost Probability: 2.6%. Misses requirement | Wind Speed: 10m/s. Misses requirement |
| Rule fails. 17:00 | Time Window: No. Misses requirement | Frost Probability: 1.5%. Misses requirement | Wind Speed: 5m/s. Misses requirement |
| Rule fails. 18:00 | Time Window: No. Misses requirement | Frost Probability: 28%. Misses requirement | Wind Speed: 6.4m/s. Misses requirement |
| Rule fails. 19:00 | Time Window: No. Misses requirement | Frost Probability: 27%. Misses requirement | Wind Speed: 7.6m/s. Misses requirement |
| Rule fails. 20:00 | Time Window: No. Misses requirement | Frost Probability: 27%. Misses requirement | Wind Speed: 8.6m/s. Misses requirement |
| Rule fails. 21:00 | Time Window: No. Misses requirement | Frost Probability: 27%. Misses requirement | Wind Speed: 10m/s. Misses requirement |
| Rule fails. 22:00 | Time Window: No. Misses requirement | Frost Probability: 14%. Misses requirement | Wind Speed: 9.3m/s. Misses requirement |
| Rule fails. 23:00 | Time Window: No. Misses requirement | Frost Probability: 14%. Misses requirement | Wind Speed: 8.9m/s. Misses requirement |
| Sun, Oct 25 | |||
| Rule fails. 24:00 | Time Window: No. Misses requirement | Frost Probability: 1.5%. Misses requirement | Wind Speed: 8.9m/s. Misses requirement |
| Rule fails. 01:00 | Time Window: No. Misses requirement | Frost Probability: 0%. Misses requirement | Wind Speed: Value unavailable. Misses requirement |
| Rule fails. 01:00 | Time Window: No. Misses requirement | Frost Probability: 1.6%. Misses requirement | Wind Speed: 9m/s. Misses requirement |
| Rule fails. 02:00 | Time Window: No. Misses requirement | Frost Probability: 1.7%. Misses requirement | Wind Speed: 9.1m/s. Misses requirement |
| Rule fails. 03:00 | Time Window: No. Misses requirement | Frost Probability: 2.6%. Misses requirement | Wind Speed: 9.3m/s. Misses requirement |
| Rule fails. 04:00 | Time Window: No. Misses requirement | Frost Probability: 3.1%. Misses requirement | Wind Speed: 9.5m/s. Misses requirement |
| Rule fails. 05:00 | Time Window: No. Misses requirement | Frost Probability: 2.6%. Misses requirement | Wind Speed: 9.6m/s. Misses requirement |
| Rule fails. 06:00 | Time Window: Yes. Meets requirement | Frost Probability: 1.7%. Misses requirement | Wind Speed: 9.7m/s. Misses requirement |
| Rule fails. 07:00 | Time Window: Yes. Meets requirement | Frost Probability: 1.6%. Misses requirement | Wind Speed: 9.8m/s. Misses requirement |
| Rule fails. 08:00 | Time Window: Yes. Meets requirement | Frost Probability: 16%. Misses requirement | Wind Speed: 9.8m/s. Misses requirement |
| Rule fails. 09:00 | Time Window: No. Misses requirement | Frost Probability: 14%. Misses requirement | Wind Speed: 9.8m/s. Misses requirement |
| Rule fails. 10:00 | Time Window: No. Misses requirement | Frost Probability: 14%. Misses requirement | Wind Speed: 10m/s. Misses requirement |
| Rule fails. 11:00 | Time Window: No. Misses requirement | Frost Probability: 14%. Misses requirement | Wind Speed: 11m/s. Misses requirement |
| Rule fails. 12:00 | Time Window: No. Misses requirement | Frost Probability: 1.3%. Misses requirement | Wind Speed: 12m/s. Misses requirement |
| Rule fails. 13:00 | Time Window: No. Misses requirement | Frost Probability: 1.3%. Misses requirement | Wind Speed: 13m/s. Misses requirement |
| Rule fails. 14:00 | Time Window: No. Misses requirement | Frost Probability: 2.1%. Misses requirement | Wind Speed: 13m/s. Misses requirement |
| Rule fails. 15:00 | Time Window: No. Misses requirement | Frost Probability: 2.6%. Misses requirement | Wind Speed: 13m/s. Misses requirement |
| Rule fails. 16:00 | Time Window: No. Misses requirement | Frost Probability: 2.6%. Misses requirement | Wind Speed: 12m/s. Misses requirement |
| Rule fails. 17:00 | Time Window: No. Misses requirement | Frost Probability: 27%. Misses requirement | Wind Speed: 11m/s. Misses requirement |
| Rule fails. 18:00 | Time Window: No. Misses requirement | Frost Probability: 28%. Misses requirement | Wind Speed: 10m/s. Misses requirement |
| Rule fails. 19:00 | Time Window: No. Misses requirement | Frost Probability: 32%. Misses requirement | Wind Speed: 9.5m/s. Misses requirement |
| Rule fails. 20:00 | Time Window: No. Misses requirement | Frost Probability: 28%. Misses requirement | Wind Speed: 8.8m/s. Misses requirement |
How to read: colored cells show whether each predicate requirement is met; highlighted rows mean the full rule matched (an opportunity).
Supporting forecast inputs
Additional hourly values for interpreting the forecast and any derived scores. See the separate requirements breakdown for rule logic; missing values are unavailable.
| Forecast time (Europe/London) | Dew Point | Surface Temperature | Temperature | Time Window | Total Cloud Coverage | Vapor Pressure Deficit |
|---|---|---|---|---|---|---|
| Thu, Oct 22, 2026Sunrise · Sunset | ||||||
| Night | 1.7°C | 1.7°C | 4°C | Unavailable | 0% | 0.12kPa |
| Night | 1.5°C | 1.5°C | 3.6°C | Unavailable | 0% | 0.11kPa |
| Fri, Oct 23, 2026Sunrise · Sunset | ||||||
| Night | 1.1°C | 0.9°C | 3.1°C | Unavailable | 0% | 0.1kPa |
| Night | 1.1°C | 0.4°C | 2.7°C | Unavailable | 0% | 0.08kPa |
| Night | 0.1°C | -0.8°C | 1.3°C | Unavailable | 0% | 0.05kPa |
| Night | -0.1°C | -1.3°C | 1.1°C | Unavailable | 0% | 0.05kPa |
| Night | -0.7°C | -1.3°C | 0.4°C | Unavailable | 100% | 0.05kPa |
| Night | 0.5°C | -0.2°C | 1.5°C | Unavailable | 100% | 0.05kPa |
| Night | -0.1°C | -1.1°C | 0.9°C | Unavailable | 82% | 0.05kPa |
| Night | -0.4°C | -0.6°C | 1.2°C | Unavailable | 46% | 0.07kPa |
| Night | 0.7°C | 1.6°C | 2.5°C | Unavailable | 100% | 0.09kPa |
| 0.9°C | 3°C | 3.2°C | Unavailable | 100% | 0.12kPa | |
| 1.5°C | 3.9°C | 3.8°C | Unavailable | 100% | 0.12kPa | |
| 1.9°C | 5.6°C | 4.4°C | Unavailable | 100% | 0.13kPa | |
| 2.4°C | 6.4°C | 4.9°C | Unavailable | 100% | 0.14kPa | |
| 3.8°C | 6.2°C | 5.5°C | Unavailable | 100% | 0.1kPa | |
| 4°C | 6.3°C | 5.4°C | Unavailable | 100% | 0.08kPa | |
| 4°C | 5.8°C | 5.7°C | Unavailable | 100% | 0.1kPa | |
| 3.1°C | 4.9°C | 5.4°C | Unavailable | 100% | 0.13kPa | |
| 2.9°C | 4.7°C | 5.4°C | Unavailable | 100% | 0.14kPa | |
| Night | 3.4°C | 4.7°C | 5.4°C | Unavailable | 100% | 0.12kPa |
| Night | 3.5°C | 4.7°C | 5.2°C | Unavailable | 100% | 0.1kPa |
| Night | 3.7°C | 4.6°C | 5.2°C | Unavailable | 100% | 0.09kPa |
| Night | 3.5°C | 4.6°C | 5.3°C | Unavailable | 100% | 0.11kPa |
| Night | 3.2°C | 4.5°C | 5.2°C | Unavailable | 100% | 0.11kPa |
| Night | 3.1°C | 4.4°C | 5.2°C | Unavailable | 100% | 0.12kPa |
| Sat, Oct 24, 2026Sunrise · Sunset | ||||||
| Night | 2.9°C | 4.2°C | 5.2°C | Unavailable | 100% | 0.13kPa |
| Night | 2.3°C | 4.2°C | 5.1°C | Unavailable | 100% | 0.16kPa |
| Night | 1.7°C | 3.1°C | 4.5°C | Unavailable | 59% | 0.15kPa |
| Night | 1.7°C | 2.4°C | 3.5°C | Unavailable | 40% | 0.09kPa |
| Night | 0.2°C | 1.3°C | 3°C | Unavailable | 100% | 0.14kPa |
| Night | -0.5°C | 0.9°C | 2.4°C | Unavailable | 100% | 0.14kPa |
| Night | -1.1°C | 0.7°C | 2.3°C | Unavailable | 100% | 0.16kPa |
| Night | -1.1°C | 0.7°C | 2.3°C | Unavailable | 100% | 0.16kPa |
| Night | -0.9°C | 1.3°C | 2.5°C | Unavailable | 100% | 0.16kPa |
| -0.6°C | 2.2°C | 3°C | Unavailable | 100% | 0.17kPa | |
| 0.2°C | 3.5°C | 4°C | Unavailable | 100% | 0.2kPa | |
| 2.6°C | 5°C | 5.6°C | Unavailable | 100% | 0.17kPa | |
| 2.3°C | 5.2°C | 6.2°C | Unavailable | 100% | 0.23kPa | |
| 3°C | 5.7°C | 6.6°C | Unavailable | 100% | 0.21kPa | |
| 3.3°C | 5.7°C | 6.7°C | Unavailable | 100% | 0.21kPa | |
| 4.4°C | 6.7°C | 7.4°C | Unavailable | 100% | 0.2kPa | |
| 5.1°C | 7.1°C | 8.3°C | Unavailable | 100% | 0.22kPa | |
| 4.9°C | 6.4°C | 7.4°C | Unavailable | 100% | 0.16kPa | |
| Night | 2.9°C | 4.6°C | 6.5°C | Unavailable | 73% | 0.21kPa |
| Night | 2.3°C | 4.8°C | 6.4°C | Unavailable | 100% | 0.24kPa |
| Night | 2.2°C | 5.1°C | 6.3°C | Unavailable | 99% | 0.24kPa |
| Night | 2.5°C | 5.1°C | 6°C | Unavailable | 99% | 0.21kPa |
| Night | 3.3°C | 5.4°C | 6°C | Unavailable | 100% | 0.16kPa |
| Night | 3.6°C | 5.5°C | 6.1°C | Unavailable | 100% | 0.15kPa |
| Sun, Oct 25, 2026Sunrise · Sunset | ||||||
| Night | 4.3°C | 6°C | 6.8°C | Unavailable | 100% | 0.16kPa |
| Night | Unavailable | Unavailable | Unavailable | Unavailable | Unavailable | Unavailable |
| Night | 4.6°C | 6.4°C | 7.3°C | Unavailable | 100% | 0.17kPa |
| Night | 4.4°C | 6.3°C | 7.3°C | Unavailable | 99% | 0.18kPa |
| Night | 3.7°C | 6.1°C | 6.9°C | Unavailable | 98% | 0.2kPa |
| Night | 3.3°C | 6°C | 6.7°C | Unavailable | 98% | 0.21kPa |
| Night | 3.2°C | 6°C | 6.6°C | Unavailable | 98% | 0.2kPa |
| Night | 3.7°C | 6°C | 6.7°C | Unavailable | 99% | 0.19kPa |
| Night | 3.8°C | 6°C | 6.7°C | Unavailable | 100% | 0.18kPa |
| 3.8°C | 5.9°C | 6.5°C | Unavailable | 100% | 0.16kPa | |
| 3.9°C | 5.8°C | 6.2°C | Unavailable | 100% | 0.14kPa | |
| 3.8°C | 5.7°C | 6.1°C | Unavailable | 100% | 0.14kPa | |
| 3.8°C | 5.8°C | 6.3°C | Unavailable | 100% | 0.15kPa | |
| 3.9°C | 6°C | 6.6°C | Unavailable | 100% | 0.17kPa | |
| 3.8°C | 6.1°C | 6.8°C | Unavailable | 100% | 0.19kPa | |
| 3.6°C | 6.1°C | 6.8°C | Unavailable | 100% | 0.2kPa | |
| 3.4°C | 6.1°C | 6.8°C | Unavailable | 100% | 0.21kPa | |
| 2.9°C | 6°C | 6.6°C | Unavailable | 98% | 0.22kPa | |
| Night | 2°C | 5.8°C | 6.5°C | Unavailable | 87% | 0.26kPa |
| Night | 0.7°C | 5.5°C | 6.2°C | Unavailable | 73% | 0.3kPa |
| Night | -0.1°C | 5.2°C | 6°C | Unavailable | 64% | 0.33kPa |
| Night | 0.1°C | 5°C | 5.8°C | Unavailable | 66% | 0.3kPa |
How this forecast is evaluated
See which weather signals PhotoWeather uses to identify Morning Frost conditions across Scotland. The requirements and hourly values above show how those signals apply at Cairngorms.
Explore Morning Frost conditions across Scotland →Recorded match history
Completed PhotoWeather forecast matches recorded for this exact rule at Cairngorms during the last 365 days.
Last 30 days
0
recorded matching windows
Last 90 days
0
recorded matching windows
Last 365 days
6
recorded matching windows · 69% average confidence
Only 6 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.
Create your own Morning Frost alerts
Get notified when these conditions match at your own locations.
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.
Get Notified of Opportunities
Create your own custom alerts for this location and more.
Create Free Account