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Rule Morning Frost

Zermatt - Morning Frost - Alps

Zermatt, Valais, Switzerland

Frost crystals on calm, cold mornings near sunrise

No opportunities right now
Here’s what usually blocks matches

No Morning Frost opportunities in the next 14 days

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Rule requirements (key thresholds)
Time Window · Sunrise -45m to +90m Frost Probability · ≥ 60.0% Wind Speed · ≤ 1.5m/s

Tip: Scroll down to the 72-hour table to see exactly which condition fails hour by hour.

Most common blockers (next 72 hours)
Frost Probability 100% failing
Time Window 88% failing
Wind Speed 69% failing

Currently

Real-time conditions
Soil Temperature10.3°C
Dew Point0.3°C (low dew point)
Wind Speed4.1m/s (calm conditions)
Cloud Cover100%

Upcoming Opportunities

When all conditions match, PhotoWeather marks an opportunity window.

Times shown in Europe/Zurich

No opportunities in the next 10 days

See the blocker timeline below to understand which conditions are preventing matches.

What this forecast looks for

Plain-language explanation from the rule

This forecast tracks the conditions that create spectacular frost photography opportunities in the Alps. We combine temperature, dewpoint, humidity, and wind data to predict when hoar frost will transform Alpine landscapes into crystalline wonderlands.

The European Alps offer frost photography opportunities from valley floors to high peaks. Clear, calm nights following periods of humidity create heavy hoar frost deposits that coat everything in ice crystals. Alpine waterfalls freeze into spectacular ice sculptures, traditional chalets become fairy-tale scenes, and frozen mountain lakes offer mirror-like surfaces reflecting frost-covered peaks.

What makes the Alps special for frost photography:

  • Alpine village charm - Traditional chalets and churches encrusted with hoar frost crystals
  • Frozen waterfalls - Spectacular ice formations at Lauterbrunnen and other waterfall locations
  • High-altitude frost - Matterhorn and other peaks develop dramatic rime ice formations
  • Frozen lakes - Alpine lakes freeze solid, creating pristine foregrounds for mountain photography

Zermatt's traditional wooden chalets become postcard-perfect when covered in thick hoar frost, with the Matterhorn rising behind. Lauterbrunnen's famous waterfalls partially freeze, creating dramatic ice curtains and pillars. High-altitude locations develop spectacular rime ice—the fine ice feathers that coat everything on exposed peaks. Frozen mountain lakes like those in St. Moritz's Engadin Valley become skating rinks with 4,000m peaks reflected in perfectly smooth ice. The car-free villages of Wengen and Mürren offer pristine frost scenes without modern intrusions. The key is timing—our forecast identifies clear, cold nights that produce heavy frost, and predicts morning conditions for photography before sun melts the formations.

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72-hour requirements breakdown

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/Zurich
Time Window
Sunrise -45m to +90m
Frost Probability
≥ 60.0%
Wind Speed
≤ 1.5m/s
Wed, Jul 8
06:003%4.4m/s
07:003%4.3m/s
08:003.2%4.2m/s
09:002.5%4.7m/s
10:002.5%4.7m/s
11:002.3%4.5m/s
12:000%4.3m/s
13:000%4m/s
14:000%4m/s
15:000%4.1m/s
16:000%4.1m/s
17:000%4.2m/s
18:000%4.4m/s
19:000%4.3m/s
20:000%4.2m/s
21:000%4.1m/s
22:000%4m/s
23:000%3.9m/s
Thu, Jul 9
24:000%3.7m/s
01:000%3.4m/s
02:000%3m/s
03:000%3.2m/s
04:004%3.2m/s
05:004%3m/s
06:004.5%2.8m/s
07:004.7%2.5m/s
08:004.9%2.2m/s
09:004.4%1.9m/s
10:004.2%2.1m/s
11:000%2m/s
12:000%2m/s
13:000%1.8m/s
14:000%1.8m/s
15:000%2.1m/s
16:000%2.2m/s
17:000%2.2m/s
18:000%2.2m/s
19:000%2m/s
20:000%1.8m/s
21:000%1.6m/s
22:000%0.77m/s
23:000%0.93m/s
Fri, Jul 10
24:000%1.6m/s
01:000%2.2m/s
02:000%2.5m/s
03:000%2.1m/s
04:000%1.2m/s
05:000%1.1m/s
06:000%0.85m/s
07:003.8%0.76m/s
08:000%0.55m/s
09:000%0.46m/s
10:000%0.53m/s
11:000%0.69m/s
12:000%0.83m/s
13:000%0.97m/s
14:000%1.2m/s
15:000%1.3m/s
16:000%2.9m/s
17:000%1.1m/s
18:000%3.6m/s
19:000%3.4m/s
20:000%0.83m/s
21:000%1.1m/s
22:000%1.4m/s
23:004.9%1.6m/s
Sat, Jul 11
24:004.9%1.4m/s
01:004.5%1.2m/s
02:004.7%1m/s
03:004%1.3m/s
04:000%1.5m/s
05:000%1.8m/s
06:000%2.2m/s
07:000%2.7m/s
08:000%3.2m/s
09:000%3.4m/s
10:000%3.6m/s
11:000%3.8m/s
12:000%3.7m/s
13:000%3.6m/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
Wed, Jul 8 Sunrise 05:47 Sunset 21:20
15:00
0.3°C 10°C 13°C - 100% 0.91kPa
16:00
0.6°C 11°C 13°C - 100% 0.89kPa
17:00
1°C 11°C 13°C - 52% 0.86kPa
18:00
1.6°C 12°C 13°C - 52% 0.79kPa
19:00
1.9°C 12°C 12°C - 52% 0.68kPa
20:00
2.7°C 11°C 11°C - 7% 0.53kPa
21:00
2.8°C 11°C 8.1°C - 6% 0.33kPa
22:00
2.3°C 11°C 6.6°C - 6% 0.26kPa
23:00
1.7°C 10°C 6.1°C - 5% 0.25kPa
Thu, Jul 9 Sunrise 05:47 Sunset 21:20
24:00
1.4°C 9.7°C 5.7°C - 5% 0.24kPa
01:00
1.3°C 9.2°C 5.4°C - 3% 0.22kPa
02:00
1.4°C 8.6°C 5.3°C - 4% 0.21kPa
03:00
1.5°C 8.2°C 5.2°C - 5% 0.2kPa
04:00
1.5°C 7.7°C 5°C - 5% 0.19kPa
05:00
1.2°C 7.3°C 4.8°C - 5% 0.2kPa
06:00
0.4°C 7°C 4.7°C - 5% 0.22kPa
07:00
1.1°C 6.8°C 6.5°C - 5% 0.31kPa
08:00
0.7°C 6.8°C 9.1°C - 5% 0.51kPa
09:00
-0.5°C 7°C 11°C - 5% 0.71kPa
10:00
-0.4°C 7.5°C 12°C - 5% 0.84kPa
11:00
0.1°C 8.3°C 13°C - 2% 0.93kPa
12:00
0.8°C 9°C 14°C - 0% 0.97kPa
13:00
1.5°C 9.8°C 15°C - 0% 1kPa
14:00
2.2°C 11°C 15°C - 2% 1kPa
15:00
2.7°C 11°C 16°C - 3% 1kPa
16:00
3.2°C 12°C 16°C - 14% 1kPa
17:00
3.5°C 12°C 15°C - 24% 0.95kPa
18:00
3.9°C 13°C 15°C - 29% 0.88kPa
19:00
4.2°C 13°C 14°C - 27% 0.78kPa
20:00
5.6°C 13°C 13°C - 29% 0.61kPa
21:00
5.9°C 12°C 10°C - 1% 0.31kPa
22:00
4.9°C 12°C 8°C - 1% 0.2kPa
23:00
4.7°C 11°C 7.6°C - 1% 0.19kPa
Fri, Jul 10 Sunrise 05:47 Sunset 21:20
24:00
4.6°C 11°C 7.5°C - 1% 0.19kPa
01:00
4.8°C 10°C 7.5°C - 0% 0.18kPa
02:00
5.1°C 10°C 7.3°C - 0% 0.14kPa
03:00
5°C 9.7°C 6.5°C - 0% 0.09kPa
04:00
4.5°C 9.2°C 5.7°C - 0% 0.07kPa
05:00
4.1°C 8.7°C 5.3°C - 0% 0.07kPa
06:00
3.7°C 8.3°C 5.1°C - 0% 0.08kPa
07:00
5.7°C 8°C 7.7°C - 2% 0.13kPa
08:00
5.8°C 8.1°C 10°C - 10% 0.32kPa
09:00
5.5°C 8.4°C 11°C - 29% 0.44kPa
10:00
5.5°C 8.9°C 12°C - 59% 0.53kPa
11:00
5.5°C 9.7°C 13°C - 100% 0.59kPa
12:00
5.7°C 10°C 13°C - 100% 0.58kPa
13:00
5.9°C 11°C 13°C - 100% 0.57kPa
14:00
5.7°C 11°C 13°C - 100% 0.57kPa
15:00
5.5°C 11°C 12°C - 100% 0.51kPa
16:00
5.9°C 11°C 11°C - 100% 0.41kPa
17:00
5.3°C 11°C 9.8°C - 86% 0.32kPa
18:00
6.7°C 11°C 9.8°C - 100% 0.23kPa
19:00
6.2°C 11°C 7.5°C - 100% 0.08kPa
20:00
5.2°C 11°C 7.6°C - 100% 0.16kPa
21:00
4.1°C 9.9°C 7.2°C - 68% 0.19kPa
22:00
3°C 8.9°C 6.7°C - 37% 0.22kPa
23:00
1.9°C 7.9°C 6.3°C - 5% 0.25kPa
Sat, Jul 11 Sunrise 05:48 Sunset 21:19
24:00
2.6°C 7.7°C 7.8°C - 10% 0.32kPa
01:00
3.3°C 7.6°C 9.2°C - 14% 0.39kPa
02:00
3.8°C 7.5°C 11°C - 19% 0.48kPa
03:00
3.9°C 8°C 12°C - 46% 0.56kPa
04:00
3.9°C 8.5°C 13°C - 73% 0.65kPa
05:00
3.8°C 9°C 14°C - 100% 0.75kPa
06:00
3.8°C 9.5°C 13°C - 100% 0.74kPa
07:00
3.8°C 10°C 13°C - 100% 0.73kPa
08:00
3.8°C 10°C 13°C - 100% 0.73kPa
09:00
4.7°C 10°C 11°C - 100% 0.5kPa
10:00
5.1°C 10°C 9.7°C - 100% 0.32kPa
11:00
5.3°C 10°C 7.8°C - 100% 0.17kPa
12:00
5.5°C 10°C 7.7°C - 100% 0.15kPa
13:00
5.8°C 10°C 7.6°C - 100% 0.12kPa
14:00
6°C 10°C 7.5°C - 100% 0.1kPa
How to read: these inputs help produce the derived score; they are not requirements by themselves.

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