Rule Morning Frost

Morning Frost Forecast for Zermatt, Alps

Zermatt, Valais, Switzerland

Zermatt provides Matterhorn views above larch forest, village rooftops and mountain lakes, with winter snow simplifying slopes into graphic tonal layers.

Currently

Real-time conditions

Frost Probability

Soil Temperature6.8°C

Dew Point-1.3°C (low dew point)

Wind Speed1.3m/s (calm conditions)

Cloud Cover5%

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 (74-hour forecast)

Frost Probability100% of hours
Time Window83% of hours
Wind Speed78% 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 Zermatt.

Explore Morning Frost conditions across Alps →

Recorded match history

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

Last 30 days

recorded matching windows

Last 90 days

recorded matching windows

Last 365 days

recorded matching windows · 64% average confidence

Most frequent recorded start hour

06:00 local time, shared by 21 of 56 matches recorded in the last 365 days.

Most represented month

April, with 18 of 56 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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74-hour requirements breakdown

When available, the detailed table below covers only the stated 74-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 74 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
Mon, Aug 24
06:00	✓	3.8%	0.98m/s
07:00	✓	5%	0.69m/s
08:00	✓	5%	0.81m/s
09:00	✕	4.9%	1.1m/s
10:00	✕	4.6%	1.3m/s
11:00	✕	4.8%	1.4m/s
12:00	✕	4.3%	1.6m/s
13:00	✕	3.6%	1.3m/s
14:00	✕	0%	1.7m/s
15:00	✕	0%	1.5m/s
16:00	✕	0%	1.3m/s
17:00	✕	0%	2.8m/s
18:00	✕	0%	4m/s
19:00	✕	0%	4.2m/s
20:00	✕	0%	3.8m/s
21:00	✕	0%	3.1m/s
22:00	✕	0%	2.8m/s
23:00	✕	0%	4.1m/s
Tue, Aug 25
24:00	✕	0%	0.39m/s
01:00	✕	0%	2.4m/s
02:00	✕	0%	2m/s
03:00	✕	1.6%	1.9m/s
04:00	✕	1.2%	2.5m/s
05:00	✓	1.2%	1.9m/s
06:00	✓	1.2%	2.1m/s
07:00	✓	1.7%	2m/s
08:00	✓	2.7%	2m/s
09:00	✕	4.3%	2.2m/s
10:00	✕	4.3%	2.1m/s
11:00	✕	4.2%	1.6m/s
12:00	✕	0%	1.2m/s
13:00	✕	0%	1.2m/s
14:00	✕	0%	0.93m/s
15:00	✕	0%	1.2m/s
16:00	✕	0%	1.7m/s
17:00	✕	0%	1.7m/s
18:00	✕	0%	1.5m/s
19:00	✕	0%	1.2m/s
20:00	✕	0%	1.5m/s
21:00	✕	0%	0.95m/s
22:00	✕	0%	0.79m/s
23:00	✕	0%	1.6m/s
Wed, Aug 26
24:00	✕	0%	1.7m/s
01:00	✕	2.1%	1.5m/s
02:00	✕	3.1%	1.7m/s
03:00	✕	3.3%	1.7m/s
04:00	✕	3.1%	1.7m/s
05:00	✓	2%	2m/s
06:00	✓	32%	1.8m/s
07:00	✓	32%	1.9m/s
08:00	✓	29%	1.7m/s
09:00	✕	40%	1.9m/s
10:00	✕	3.3%	2m/s
11:00	✕	4.9%	1.9m/s
12:00	✕	3.4%	2.4m/s
13:00	✕	0%	2.6m/s
14:00	✕	0%	2.4m/s
15:00	✕	0%	3.4m/s
16:00	✕	0%	4.4m/s
17:00	✕	0%	5.4m/s
18:00	✕	0%	5.5m/s
19:00	✕	0%	5.6m/s
20:00	✕	0%	5.7m/s
21:00	✕	0%	5.8m/s
22:00	✕	0%	5.9m/s
23:00	✕	0%	6m/s
Thu, Aug 27
24:00	✕	0%	6m/s
01:00	✕	0%	5.9m/s
02:00	✕	0%	5.8m/s
03:00	✕	0%	5.8m/s
04:00	✕	0%	5.7m/s
05:00	✓	0%	5.7m/s
06:00	✓	0%	5.8m/s
07:00	✓	0%	5.8m/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 06:39 Sunset 20:22
10:00	-1.3°C	6.8°C	9.2°C	-	5%	0.61kPa
11:00	0.2°C	6.9°C	10°C	-	6%	0.61kPa
12:00	1.8°C	7.1°C	11°C	-	26%	0.6kPa
13:00	2.5°C	8°C	11°C	-	100%	0.59kPa
14:00	3.6°C	8.9°C	11°C	-	48%	0.5kPa
15:00	4.6°C	9.7°C	11°C	-	77%	0.42kPa
16:00	4.8°C	10°C	10°C	-	49%	0.4kPa
17:00	5.5°C	10°C	9.3°C	-	100%	0.27kPa
18:00	6.4°C	11°C	8.2°C	-	100%	0.13kPa
19:00	6.2°C	10°C	7.3°C	-	100%	0.07kPa
20:00	4.8°C	10°C	6.7°C	-	98%	0.12kPa
21:00 ☾	5.1°C	9.9°C	6°C	-	100%	0.05kPa
22:00 ☾	5.3°C	9.5°C	5.8°C	-	100%	0.03kPa
23:00 ☾	5.2°C	9.2°C	5.6°C	-	100%	0.02kPa
Tue, Aug 25 Sunrise 06:39 Sunset 20:22
24:00 ☾	4.2°C	8.9°C	5.3°C	-	100%	0.06kPa
01:00 ☾	4.1°C	8.7°C	5.5°C	-	100%	0.09kPa
02:00 ☾	4°C	8.4°C	5.2°C	-	100%	0.07kPa
03:00 ☾	3.5°C	8°C	4.6°C	-	100%	0.06kPa
04:00 ☾	3.9°C	7.8°C	4.6°C	-	100%	0.04kPa
05:00 ☾	3.9°C	7.5°C	4.8°C	-	100%	0.05kPa
06:00 ☾	3.7°C	7.3°C	4.7°C	-	100%	0.06kPa
07:00	3.2°C	7.1°C	4.3°C	-	65%	0.06kPa
08:00	3.7°C	6.8°C	5.4°C	-	21%	0.1kPa
09:00	3.2°C	7°C	6.7°C	-	23%	0.21kPa
10:00	2.5°C	7.3°C	7.6°C	-	19%	0.31kPa
11:00	2.1°C	7.9°C	8.5°C	-	51%	0.4kPa
12:00	2°C	8.6°C	9.3°C	-	78%	0.47kPa
13:00	1.9°C	9.3°C	10°C	-	100%	0.52kPa
14:00	1.8°C	9.7°C	9.8°C	-	100%	0.52kPa
15:00	2.2°C	9.7°C	9.3°C	-	100%	0.45kPa
16:00	2.9°C	9.7°C	8.5°C	-	100%	0.36kPa
17:00	3.3°C	9.7°C	8.5°C	-	45%	0.34kPa
18:00	3.4°C	10°C	9°C	-	61%	0.37kPa
19:00	3.4°C	10°C	8.9°C	-	58%	0.37kPa
20:00	3.5°C	9.8°C	7.4°C	-	51%	0.24kPa
21:00 ☾	2.8°C	9.3°C	6.3°C	-	74%	0.21kPa
22:00 ☾	2.5°C	8.9°C	6.1°C	-	100%	0.21kPa
23:00 ☾	2.6°C	8.5°C	6.3°C	-	100%	0.22kPa
Wed, Aug 26 Sunrise 06:41 Sunset 20:20
24:00 ☾	2.7°C	8.1°C	5.6°C	-	100%	0.16kPa
01:00 ☾	2.7°C	7.7°C	4.7°C	-	84%	0.11kPa
02:00 ☾	2.8°C	7.4°C	4.5°C	-	5%	0.09kPa
03:00 ☾	2.5°C	6.9°C	3.7°C	-	5%	0.07kPa
04:00 ☾	2.2°C	6.5°C	3.4°C	-	5%	0.07kPa
05:00 ☾	2°C	6.2°C	3.5°C	-	40%	0.08kPa
06:00 ☾	1.8°C	5.9°C	3.3°C	-	4%	0.08kPa
07:00	1.8°C	5.5°C	3.3°C	-	2%	0.08kPa
08:00	3.7°C	5.4°C	5.9°C	-	29%	0.13kPa
09:00	3.5°C	5.7°C	7.8°C	-	35%	0.27kPa
10:00	3.3°C	6.3°C	8.9°C	-	61%	0.37kPa
11:00	3.5°C	7°C	10°C	-	7%	0.45kPa
12:00	4.1°C	8°C	11°C	-	81%	0.49kPa
13:00	4.3°C	8.8°C	12°C	-	55%	0.53kPa
14:00	4.3°C	9.8°C	13°C	-	50%	0.62kPa
15:00	5.4°C	9.7°C	11°C	-	53%	0.39kPa
16:00	5.9°C	9.6°C	8.9°C	-	56%	0.21kPa
17:00	6.2°C	9.6°C	7°C	-	59%	0.06kPa
18:00	6°C	9.3°C	7°C	-	63%	0.06kPa
19:00	5.9°C	9.1°C	6.9°C	-	67%	0.07kPa
20:00	5.7°C	8.9°C	6.8°C	-	71%	0.07kPa
21:00 ☾	5.7°C	8.7°C	6.8°C	-	71%	0.07kPa
22:00 ☾	5.7°C	8.6°C	6.8°C	-	71%	0.07kPa
23:00 ☾	5.7°C	8.5°C	6.8°C	-	71%	0.07kPa
Thu, Aug 27 Sunrise 06:42 Sunset 20:18
24:00 ☾	6.1°C	8.4°C	7.2°C	-	81%	0.07kPa
01:00 ☾	6.5°C	8.3°C	7.6°C	-	90%	0.07kPa
02:00 ☾	7°C	8.2°C	8°C	-	100%	0.08kPa
03:00 ☾	7.3°C	8.4°C	8.9°C	-	89%	0.11kPa
04:00 ☾	7.7°C	8.6°C	9.7°C	-	77%	0.15kPa
05:00 ☾	8°C	8.9°C	11°C	-	66%	0.2kPa
06:00 ☾	8.2°C	9.3°C	11°C	-	77%	0.25kPa
07:00	8.4°C	9.8°C	12°C	-	89%	0.31kPa
08:00	8.6°C	10°C	13°C	-	100%	0.36kPa
09:00	8.4°C	11°C	13°C	-	100%	0.37kPa

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 24, 2026, 7:34 AM UTC

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