Rule Morning Frost

Morning Frost Forecast for Mürren, Alps

Mürren, Bern, Switzerland

Mürren clings to a high terrace opposite the Eiger, Mönch and Jungfrau, with chalet roofs and meadow lines anchoring the panoramic mountain wall.

Currently

Real-time conditions

Frost Probability

54%

Soil Temperature3.1°C

Dew Point3.1°C (low dew point)

Wind Speed1.2m/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 (73-hour forecast)

Frost Probability100% of hours
Time Window83% of hours
Wind Speed57% 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 Mürren.

Explore Morning Frost conditions across Alps →

Recorded match history

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

Last 30 days

recorded matching windows

Last 90 days

recorded matching windows · 59% average confidence

Last 365 days

114

recorded matching windows · 65% average confidence

Most frequent recorded start hour

05:00 local time, shared by 29 of 114 matches recorded in the last 365 days.

Most represented month

May, with 35 of 114 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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73-hour requirements breakdown

When available, the detailed table below covers only the stated 73-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 73 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
07:00	✓	52%	0.97m/s
08:00	✓	56%	1.1m/s
09:00	✕	54%	1.1m/s
10:00	✕	54%	1.2m/s
11:00	✕	50%	0.89m/s
12:00	✕	50%	0.95m/s
13:00	✕	43%	1.3m/s
14:00	✕	39%	1.4m/s
15:00	✕	39%	1.4m/s
16:00	✕	37%	1.7m/s
17:00	✕	34%	2.6m/s
18:00	✕	33%	3.6m/s
19:00	✕	18%	4.2m/s
20:00	✕	13%	4m/s
21:00	✕	13%	4m/s
22:00	✕	13%	3.3m/s
23:00	✕	13%	2.9m/s
Tue, Aug 25
24:00	✕	13%	3.2m/s
01:00	✕	13%	2.9m/s
02:00	✕	15%	2.7m/s
03:00	✕	15%	2m/s
04:00	✕	15%	2.6m/s
05:00	✓	15%	2.2m/s
06:00	✓	15%	1.8m/s
07:00	✓	24%	1.4m/s
08:00	✓	24%	1.3m/s
09:00	✕	35%	1.3m/s
10:00	✕	44%	1.2m/s
11:00	✕	41%	1.3m/s
12:00	✕	39%	1.3m/s
13:00	✕	39%	1.5m/s
14:00	✕	35%	1.8m/s
15:00	✕	34%	2m/s
16:00	✕	37%	2.2m/s
17:00	✕	37%	2m/s
18:00	✕	42%	1.5m/s
19:00	✕	46%	0.9m/s
20:00	✕	35%	0.43m/s
21:00	✕	29%	1.4m/s
22:00	✕	26%	1.6m/s
23:00	✕	22%	1.3m/s
Wed, Aug 26
24:00	✕	22%	0.99m/s
01:00	✕	24%	1.3m/s
02:00	✕	39%	1.4m/s
03:00	✕	39%	1.4m/s
04:00	✕	39%	1.3m/s
05:00	✓	24%	1.2m/s
06:00	✓	25%	0.82m/s
07:00	✓	26%	0.65m/s
08:00	✓	24%	0.93m/s
09:00	✕	37%	1.3m/s
10:00	✕	37%	1.3m/s
11:00	✕	44%	1.6m/s
12:00	✕	40%	2m/s
13:00	✕	37%	2m/s
14:00	✕	36%	1.8m/s
15:00	✕	33%	2.5m/s
16:00	✕	31%	3.2m/s
17:00	✕	15%	3.9m/s
18:00	✕	15%	3.8m/s
19:00	✕	17%	3.8m/s
20:00	✕	18%	3.7m/s
21:00	✕	18%	3.9m/s
22:00	✕	21%	4.2m/s
23:00	✕	15%	4.4m/s
Thu, Aug 27
24:00	✕	15%	4.4m/s
01:00	✕	12%	4.4m/s
02:00	✕	12%	4.4m/s
03:00	✕	16%	4.6m/s
04:00	✕	19%	4.7m/s
05:00	✓	22%	4.9m/s
06:00	✓	17%	4.8m/s
07:00	✓	29%	4.7m/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/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 20:22
10:00	3.1°C	3.1°C	10°C	-	5%	0.48kPa
11:00	3.7°C	3.1°C	11°C	-	21%	0.53kPa
12:00	4.2°C	3°C	12°C	-	22%	0.57kPa
13:00	4.2°C	3.1°C	12°C	-	57%	0.58kPa
14:00	4.5°C	3.2°C	12°C	-	100%	0.58kPa
15:00	4.8°C	3.4°C	12°C	-	85%	0.57kPa
16:00	5.2°C	3.7°C	12°C	-	100%	0.54kPa
17:00	6.1°C	3.9°C	12°C	-	77%	0.43kPa
18:00	6.7°C	4°C	11°C	-	100%	0.31kPa
19:00	7.2°C	4°C	9.3°C	-	100%	0.15kPa
20:00	6.8°C	4°C	7.5°C	-	100%	0.05kPa
21:00 ☾	6.1°C	4°C	6.6°C	-	100%	0.03kPa
22:00 ☾	5.9°C	3.9°C	6.5°C	-	100%	0.04kPa
23:00 ☾	5.9°C	3.8°C	6.6°C	-	100%	0.04kPa
Tue, Aug 25 Sunrise 06:38 Sunset 20:22
24:00 ☾	5.6°C	3.8°C	6.4°C	-	100%	0.05kPa
01:00 ☾	6.1°C	3.8°C	6.8°C	-	100%	0.05kPa
02:00 ☾	6°C	3.8°C	6.7°C	-	99%	0.04kPa
03:00 ☾	5.5°C	3.7°C	6.2°C	-	100%	0.04kPa
04:00 ☾	5.2°C	3.6°C	5.9°C	-	100%	0.04kPa
05:00 ☾	5.3°C	3.6°C	5.9°C	-	100%	0.04kPa
06:00 ☾	5°C	3.5°C	6°C	-	100%	0.06kPa
07:00	4.3°C	3.5°C	6.1°C	-	100%	0.11kPa
08:00	5.1°C	3.4°C	7.1°C	-	100%	0.13kPa
09:00	5°C	3.5°C	7.8°C	-	21%	0.18kPa
10:00	4.5°C	3.6°C	8.4°C	-	26%	0.26kPa
11:00	4.6°C	3.8°C	9.2°C	-	42%	0.31kPa
12:00	4.6°C	4.1°C	9.9°C	-	47%	0.37kPa
13:00	4.7°C	4.3°C	10°C	-	54%	0.4kPa
14:00	5.2°C	4.5°C	11°C	-	48%	0.41kPa
15:00	5.8°C	4.7°C	11°C	-	68%	0.39kPa
16:00	6.1°C	4.9°C	11°C	-	45%	0.33kPa
17:00	6.4°C	5°C	10°C	-	57%	0.29kPa
18:00	6.2°C	5.1°C	9.8°C	-	27%	0.27kPa
19:00	6°C	5.1°C	9°C	-	23%	0.22kPa
20:00	4.9°C	5°C	6.7°C	-	22%	0.11kPa
21:00 ☾	3.7°C	4.7°C	5.8°C	-	25%	0.12kPa
22:00 ☾	3.2°C	4.5°C	5.7°C	-	57%	0.14kPa
23:00 ☾	3.1°C	4.3°C	5.9°C	-	100%	0.16kPa
Wed, Aug 26 Sunrise 06:39 Sunset 20:20
24:00 ☾	3.3°C	4.1°C	5.9°C	-	100%	0.15kPa
01:00 ☾	3.6°C	3.9°C	6.3°C	-	100%	0.16kPa
02:00 ☾	3.4°C	3.8°C	6.1°C	-	5%	0.16kPa
03:00 ☾	2.6°C	3.7°C	4.9°C	-	5%	0.13kPa
04:00 ☾	2.5°C	3.7°C	4.7°C	-	5%	0.13kPa
05:00 ☾	2.3°C	3.6°C	4.5°C	-	83%	0.12kPa
06:00 ☾	2.5°C	3.5°C	4.9°C	-	72%	0.13kPa
07:00	2.6°C	3.5°C	5.1°C	-	93%	0.14kPa
08:00	5.1°C	3.4°C	8°C	-	90%	0.19kPa
09:00	5.5°C	3.4°C	9°C	-	82%	0.24kPa
10:00	5.9°C	3.4°C	9.9°C	-	100%	0.29kPa
11:00	6.1°C	3.4°C	11°C	-	37%	0.34kPa
12:00	6.2°C	3.5°C	12°C	-	40%	0.42kPa
13:00	6.3°C	3.8°C	13°C	-	100%	0.49kPa
14:00	6.1°C	4.1°C	13°C	-	80%	0.54kPa
15:00	6.1°C	4.1°C	11°C	-	83%	0.36kPa
16:00	5.8°C	4.1°C	8.9°C	-	85%	0.22kPa
17:00	5.3°C	4.2°C	6.9°C	-	88%	0.1kPa
18:00	5.4°C	4.1°C	6.9°C	-	85%	0.1kPa
19:00	5.4°C	4°C	6.9°C	-	82%	0.1kPa
20:00	5.4°C	3.9°C	6.8°C	-	78%	0.09kPa
21:00 ☾	5.5°C	3.8°C	6.8°C	-	69%	0.08kPa
22:00 ☾	5.7°C	3.7°C	6.8°C	-	60%	0.07kPa
23:00 ☾	5.8°C	3.6°C	6.8°C	-	51%	0.06kPa
Thu, Aug 27 Sunrise 06:40 Sunset 20:18
24:00 ☾	6.1°C	3.5°C	7°C	-	60%	0.06kPa
01:00 ☾	6.3°C	3.5°C	7.3°C	-	69%	0.06kPa
02:00 ☾	6.6°C	3.5°C	7.5°C	-	79%	0.07kPa
03:00 ☾	7.3°C	3.6°C	8.6°C	-	70%	0.09kPa
04:00 ☾	8°C	3.7°C	9.6°C	-	61%	0.12kPa
05:00 ☾	8.7°C	3.8°C	11°C	-	52%	0.15kPa
06:00 ☾	8.8°C	4°C	11°C	-	68%	0.2kPa
07:00	8.8°C	4.2°C	12°C	-	84%	0.26kPa
08:00	8.8°C	4.5°C	12°C	-	100%	0.31kPa
09:00	8.8°C	4.6°C	12°C	-	100%	0.3kPa

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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