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Rule Morning Frost

Morning Frost Forecast for Saas-Fee, Alps

Saas-Fee, Valais, Switzerland

Saas-Fee is enclosed by glaciers and high summits, where traditional timber buildings, larch woods and ice-covered peaks create compact alpine layers.

Currently

Real-time conditions
Soil Temperature8.6°C
Dew Point6.4°C (moderate dew point)
Wind Speed2.2m/s (calm conditions)
Cloud Cover20%

Upcoming Opportunities

When all conditions match, PhotoWeather marks an opportunity window.

Times shown in Europe/Zurich

No opportunities in the next 14 days

See which requirements block the most forecast hours below.

Most common blockers (95-hour forecast)

  • Frost Probability100% of hours
  • Time Window83% of hours
  • Wind Speed60% of hours

How this forecast is evaluated

See which weather signals PhotoWeather uses to identify Morning Frost conditions across Alps. The requirements and hourly values below show how those signals apply at Saas-Fee.

Explore Morning Frost conditions across Alps →

Recorded match history

Completed PhotoWeather forecast matches recorded for this exact rule at Saas-Fee during the last 365 days.

Last 30 days
0
recorded matching windows
Last 90 days
0
recorded matching windows
Last 365 days
22
recorded matching windows · 62% average confidence
Most frequent recorded start hour

08:00 local time, shared by 8 of 22 matches recorded in the last 365 days.

Most represented month

March, with 13 of 22 matches recorded in the last 365 days.

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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95-hour requirements breakdown

When available, the detailed table below covers only the stated 95-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 95 hours
AND logic: all conditions required
Meets requirement
Misses requirement
Time
Europe/Zurich
Time Window
Sunrise -45m to +90m
Frost Probability
≥ 60.0%
Wind Speed
≤ 1.5m/s
Sun, Aug 23
09:004.7%1.9m/s
10:004.9%2.3m/s
11:004.9%2.8m/s
12:000%3.2m/s
13:000%3.5m/s
14:000%3.3m/s
15:000%2.6m/s
16:000%2.3m/s
17:000%1.9m/s
18:000%1.7m/s
19:000%1.1m/s
20:000%0.46m/s
21:000%0.95m/s
22:000%0.95m/s
23:000%0.37m/s
Mon, Aug 24
24:000%1.2m/s
01:000%1.9m/s
02:000%1.2m/s
03:000%0.71m/s
04:000%0.71m/s
05:000%0.69m/s
06:000%0.55m/s
07:000%0.43m/s
08:000%0.52m/s
09:000%1.6m/s
10:000%2.2m/s
11:000%2.8m/s
12:000%3.3m/s
13:000%3.4m/s
14:000%3.1m/s
15:000%2.5m/s
16:000%2.9m/s
17:000%3m/s
18:000%3.1m/s
19:000%3.1m/s
20:000%2.2m/s
21:000%1.7m/s
22:000%1.7m/s
23:000%3.7m/s
Tue, Aug 25
24:000%1.9m/s
01:000%0.82m/s
02:000%1.3m/s
03:000%1m/s
04:000%0.44m/s
05:000%0.13m/s
06:000%0.42m/s
07:000%0.73m/s
08:000%1m/s
09:000%0.85m/s
10:000%1.5m/s
11:000%1.9m/s
12:000%2m/s
13:000%1.8m/s
14:000%1.4m/s
15:000%1.6m/s
16:000%0.8m/s
17:000%0.88m/s
18:000%1.2m/s
19:000%0.91m/s
20:000%0.63m/s
21:000%1.4m/s
22:000%0.46m/s
23:000%0.35m/s
Wed, Aug 26
24:000%1.5m/s
01:000%1.5m/s
02:000%1.4m/s
03:000%1.4m/s
04:000%1.4m/s
05:000%1.3m/s
06:000%1.1m/s
07:000%1.2m/s
08:000%1m/s
09:000%1.7m/s
10:000%2.3m/s
11:000%2.8m/s
12:000%3m/s
13:000%3m/s
14:000%3.3m/s
15:000%3m/s
16:000%2.7m/s
17:000%2.5m/s
18:000%2.4m/s
19:000%2.3m/s
20:000%2.2m/s
21:000%2.2m/s
22:000%2.2m/s
23:000%2.2m/s
Thu, Aug 27
24:000%2.2m/s
01:000%2.3m/s
02:000%2.4m/s
03:000%2.5m/s
04:000%2.6m/s
05:000%2.8m/s
06:000%3.1m/s
07:000%3.4m/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/Zurich
Dew Point
°C
Surface Temperature
°C
Temperature
°C
Time Window
Total Cloud Coverage
%
Vapor Pressure Deficit
kPa
Mon, Aug 24 Sunrise 06:38 Sunset 20:21
10:00
6.4°C 8.6°C 11°C - 20% 0.34kPa
11:00
7.2°C 8.9°C 12°C - 24% 0.38kPa
12:00
7.9°C 9.2°C 13°C - 34% 0.39kPa
13:00
8.7°C 9.8°C 12°C - 100% 0.31kPa
14:00
9.6°C 10°C 12°C - 93% 0.2kPa
15:00
9.6°C 11°C 12°C - 71% 0.17kPa
16:00
9.7°C 11°C 12°C - 95% 0.18kPa
17:00
10°C 11°C 11°C - 100% 0.08kPa
18:00
10°C 11°C 10°C - 100% 0.02kPa
19:00
10°C 11°C 10°C - 100% 0.01kPa
20:00
9°C 11°C 9.1°C - 100% 0.01kPa
21:00
8.9°C 11°C 9°C - 100% 0kPa
22:00
8.7°C 11°C 8.8°C - 100% 0.01kPa
23:00
8.2°C 11°C 8.3°C - 100% 0.01kPa
Tue, Aug 25 Sunrise 06:38 Sunset 20:21
24:00
5.7°C 10°C 7°C - 100% 0.08kPa
01:00
5.3°C 10°C 7.3°C - 100% 0.14kPa
02:00
5.9°C 10°C 7.6°C - 100% 0.11kPa
03:00
6°C 10°C 7.8°C - 100% 0.12kPa
04:00
6.3°C 9.9°C 7.2°C - 100% 0.07kPa
05:00
5.8°C 9.6°C 7°C - 100% 0.08kPa
06:00
5.9°C 9.5°C 7.1°C - 100% 0.08kPa
07:00
5.9°C 9.3°C 7.2°C - 77% 0.09kPa
08:00
6.3°C 9.2°C 8.6°C - 67% 0.16kPa
09:00
6.3°C 9.4°C 10°C - 34% 0.28kPa
10:00
6.6°C 9.7°C 11°C - 12% 0.37kPa
11:00
7°C 10°C 12°C - 26% 0.4kPa
12:00
7.5°C 11°C 12°C - 43% 0.39kPa
13:00
7.8°C 11°C 12°C - 78% 0.38kPa
14:00
7.7°C 11°C 12°C - 79% 0.35kPa
15:00
7.8°C 12°C 12°C - 89% 0.37kPa
16:00
7.3°C 12°C 12°C - 92% 0.41kPa
17:00
7.4°C 12°C 12°C - 29% 0.41kPa
18:00
7.7°C 12°C 13°C - 18% 0.4kPa
19:00
8°C 12°C 12°C - 18% 0.33kPa
20:00
7.2°C 12°C 9.1°C - 36% 0.14kPa
21:00
5.4°C 12°C 8.2°C - 41% 0.19kPa
22:00
4.9°C 11°C 7.5°C - 100% 0.17kPa
23:00
5.4°C 11°C 7.6°C - 100% 0.14kPa
Wed, Aug 26 Sunrise 06:40 Sunset 20:19
24:00
5.6°C 11°C 7.7°C - 100% 0.14kPa
01:00
5.2°C 10°C 7.5°C - 67% 0.15kPa
02:00
4.9°C 10°C 7.3°C - 6% 0.15kPa
03:00
4.5°C 9.8°C 6.8°C - 17% 0.15kPa
04:00
4.3°C 9.5°C 6.5°C - 5% 0.14kPa
05:00
4.2°C 9.1°C 6.3°C - 51% 0.13kPa
06:00
4°C 8.8°C 5.9°C - 31% 0.11kPa
07:00
4.4°C 8.5°C 6°C - 5% 0.1kPa
08:00
7.1°C 8.4°C 9.5°C - 9% 0.17kPa
09:00
7.8°C 8.7°C 11°C - 51% 0.21kPa
10:00
8.5°C 9°C 11°C - 92% 0.23kPa
11:00
8.8°C 9.5°C 12°C - 60% 0.27kPa
12:00
9.2°C 10°C 13°C - 82% 0.31kPa
13:00
9.6°C 10°C 13°C - 78% 0.29kPa
14:00
10°C 11°C 14°C - 81% 0.33kPa
15:00
9.5°C 11°C 12°C - 71% 0.22kPa
16:00
8.9°C 11°C 10°C - 61% 0.12kPa
17:00
8.3°C 11°C 8.8°C - 51% 0.04kPa
18:00
8.2°C 10°C 8.8°C - 61% 0.04kPa
19:00
8.1°C 10°C 8.8°C - 70% 0.05kPa
20:00
8.1°C 10°C 8.7°C - 80% 0.05kPa
21:00
8.2°C 10°C 9°C - 83% 0.06kPa
22:00
8.4°C 10°C 9.2°C - 86% 0.06kPa
23:00
8.5°C 10°C 9.5°C - 89% 0.07kPa
Thu, Aug 27 Sunrise 06:41 Sunset 20:17
24:00
9°C 9.9°C 9.7°C - 91% 0.06kPa
01:00
9.4°C 9.9°C 10°C - 93% 0.05kPa
02:00
9.8°C 9.9°C 10°C - 95% 0.03kPa
03:00
10°C 10°C 10°C - 94% 0.03kPa
04:00
10°C 10°C 11°C - 92% 0.02kPa
05:00
11°C 10°C 11°C - 91% 0.02kPa
06:00
11°C 10°C 12°C - 94% 0.05kPa
07:00
11°C 11°C 12°C - 97% 0.09kPa
08:00
11°C 11°C 13°C - 100% 0.13kPa
09:00
12°C 11°C 13°C - 100% 0.09kPa
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.

Forecast generated

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