Skip to content
✨ New: PhotoWeather is now available on iOS and Android
Rule Morning Frost

Interlaken - Morning Frost - Alps

Interlaken, Bern, Switzerland

Frost crystals on calm, cold mornings near sunrise

Currently

Real-time conditions
Soil Temperature10.5°C
Dew Point5.0°C (moderate dew point)
Wind Speed1.9m/s (calm conditions)
Cloud Cover1%

Upcoming Opportunities

When all conditions match, PhotoWeather marks an opportunity window.

Times shown in Europe/Zurich
Next opportunity
Heavy Frost (radiative)
Interlaken
Fri, Apr 17 · 05:53–06:00 · 1h window
Medium confidence
58%
❄️Frost Probability95%
Soil Temperature: -2.0°C
Dew Point: -7.2°C (low dew point)
Wind Speed: 0.7m/s (calm conditions)
Cloud Cover: 0%
thermometer-snow weather icon
Heavy Frost (radiative) at Sunrise
Interlaken
Fri, Apr 17 · 06:00–08:00
❄️Frost Probability:93-95%
High
thermometer-snow weather icon
Heavy Frost (radiative)
Interlaken
Fri, Apr 17 · 08:00–08:08
❄️Frost Probability:89%
Medium

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.

Create your own Morning Frost alerts

Get notified when these conditions match at your own locations.

Get this template

72-hour requirements breakdown

What passed or failed, hour by hour
0matching hours in the next 92 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, Apr 8
06:000%2.1m/s
07:000%2m/s
08:000%1.8m/s
09:000%0.72m/s
10:000%0.64m/s
11:000%1.2m/s
12:000%1.6m/s
13:000%1.8m/s
14:000%2.1m/s
15:000%2.1m/s
16:000%2.7m/s
17:000%2.7m/s
18:000%2.2m/s
19:000%1.6m/s
20:000%0.64m/s
21:000%1.6m/s
22:000%2m/s
23:000%2m/s
Thu, Apr 9
24:000%1.9m/s
01:000%1.9m/s
02:000%2m/s
03:000%1.9m/s
04:000%2m/s
05:000%2.1m/s
06:000%2.2m/s
07:000%2.2m/s
08:000%1.9m/s
09:000%0.77m/s
10:000%0.74m/s
11:000%1.4m/s
12:000%1.7m/s
13:000%1.9m/s
14:000%2m/s
15:000%2.4m/s
16:000%2.3m/s
17:000%2.3m/s
18:000%1.6m/s
19:000%1.1m/s
20:000%0.66m/s
21:000%1.7m/s
22:000%2.2m/s
23:000%2.5m/s
Fri, Apr 10
24:000%2.1m/s
01:000%2.1m/s
02:000%1.9m/s
03:000%2.4m/s
04:000%1.8m/s
05:000%1.7m/s
06:000%1.9m/s
07:000%2m/s
08:000%1.6m/s
09:000%0.7m/s
10:000%1.2m/s
11:000%1.3m/s
12:000%1.7m/s
13:000%2m/s
14:000%2.4m/s
15:000%2.6m/s
16:000%2.4m/s
17:000%1.8m/s
18:000%1.4m/s
19:000%1m/s
20:000%0.55m/s
21:000%1.1m/s
22:000%1.2m/s
23:000%0.9m/s
Sat, Apr 11
24:000%1.1m/s
01:000%1.5m/s
02:000%1.8m/s
03:000%1.8m/s
04:000%1.9m/s
05:000%2m/s
06:000%2.1m/s
07:000%2.4m/s
08:000%2.2m/s
09:0042%1.9m/s
10:0047%1.7m/s
11:0074%1.4m/s
12:0076%1.7m/s
13:0070%1.9m/s
14:0065%2.2m/s
15:0057%2.3m/s
16:0054%2.4m/s
17:0054%2.6m/s
18:0054%2.5m/s
19:0054%2.4m/s
20:0050%2.4m/s
21:0050%2.5m/s
22:0050%2.5m/s
23:0050%2.6m/s
Sun, Apr 12
24:0050%2.5m/s
01:0050%2.4m/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
Thu, Apr 9 Sunrise 06:53 Sunset 20:08
03:00
5°C 10°C 7.4°C - 1% 0.16kPa
04:00
4.4°C 10°C 7.1°C - 0% 0.17kPa
05:00
4°C 9.9°C 6.8°C - 5% 0.17kPa
06:00
3.6°C 9.6°C 6.6°C - 5% 0.18kPa
07:00
3.2°C 9.3°C 6.4°C - 4% 0.19kPa
08:00
3.9°C 9.1°C 7.8°C - 5% 0.25kPa
09:00
5.3°C 9.1°C 11°C - 5% 0.44kPa
10:00
6.4°C 9.4°C 14°C - 5% 0.59kPa
11:00
6.1°C 9.7°C 15°C - 4% 0.75kPa
12:00
5.2°C 10°C 16°C - 14% 0.91kPa
13:00
4.5°C 11°C 17°C - 15% 1kPa
14:00
4°C 11°C 17°C - 5% 1.1kPa
15:00
3.7°C 12°C 17°C - 5% 1.1kPa
16:00
3.4°C 12°C 17°C - 5% 1.1kPa
17:00
3.2°C 12°C 17°C - 2% 1.1kPa
18:00
4.5°C 13°C 16°C - 5% 0.96kPa
19:00
6.7°C 13°C 14°C - 5% 0.61kPa
20:00
5.1°C 12°C 11°C - 6% 0.39kPa
21:00
4.5°C 12°C 9.2°C - 6% 0.32kPa
22:00
4.3°C 12°C 8.5°C - 5% 0.28kPa
23:00
4°C 11°C 8.2°C - 5% 0.27kPa
Fri, Apr 10 Sunrise 06:53 Sunset 20:08
24:00
3.8°C 11°C 7.8°C - 4% 0.25kPa
01:00
3.8°C 11°C 7.6°C - 80% 0.24kPa
02:00
3.8°C 11°C 7.6°C - 19% 0.24kPa
03:00
3.9°C 10°C 7.2°C - 99% 0.2kPa
04:00
4°C 10°C 7.5°C - 100% 0.22kPa
05:00
3.8°C 9.7°C 7.1°C - 100% 0.21kPa
06:00
3.8°C 9.5°C 7°C - 100% 0.2kPa
07:00
4°C 9.3°C 7.4°C - 100% 0.21kPa
08:00
5°C 9.2°C 8.8°C - 100% 0.26kPa
09:00
5.8°C 9.2°C 11°C - 100% 0.36kPa
10:00
6.2°C 9.4°C 12°C - 100% 0.46kPa
11:00
6.5°C 9.7°C 13°C - 100% 0.54kPa
12:00
5.8°C 10°C 14°C - 100% 0.7kPa
13:00
4.8°C 10°C 15°C - 100% 0.85kPa
14:00
4.6°C 11°C 15°C - 100% 0.88kPa
15:00
4.6°C 11°C 15°C - 100% 0.88kPa
16:00
5°C 11°C 15°C - 100% 0.81kPa
17:00
5.7°C 12°C 14°C - 100% 0.72kPa
18:00
6.7°C 12°C 14°C - 100% 0.59kPa
19:00
7.9°C 12°C 12°C - 100% 0.38kPa
20:00
7.2°C 12°C 11°C - 100% 0.27kPa
21:00
6.9°C 12°C 10°C - 100% 0.24kPa
22:00
6.7°C 11°C 9.8°C - 100% 0.23kPa
23:00
6.3°C 11°C 9.5°C - 100% 0.23kPa
Sat, Apr 11 Sunrise 06:51 Sunset 20:09
24:00
5.7°C 11°C 9°C - 100% 0.23kPa
01:00
5.1°C 11°C 8.6°C - 100% 0.24kPa
02:00
4.3°C 10°C 8.3°C - 100% 0.26kPa
03:00
3.5°C 10°C 8.1°C - 100% 0.29kPa
04:00
2.9°C 10°C 7.9°C - 100% 0.31kPa
05:00
2.2°C 9.8°C 7.6°C - 100% 0.32kPa
06:00
1.5°C 9.5°C 7.1°C - 26% 0.32kPa
07:00
0.9°C 9.3°C 6.8°C - 5% 0.34kPa
08:00
1.9°C 9.1°C 8.4°C - 5% 0.4kPa
09:00
0.4°C 5.7°C 7.9°C - 36% 0.43kPa
10:00
-1°C 2.2°C 7.4°C - 67% 0.46kPa
11:00
-2.6°C -1.2°C 6.9°C - 98% 0.49kPa
12:00
-1.6°C -1.2°C 5.6°C - 95% 0.36kPa
13:00
-0.9°C -1.2°C 4.2°C - 91% 0.25kPa
14:00
-0.5°C -1.1°C 2.9°C - 88% 0.16kPa
15:00
-0.3°C -1.2°C 2.4°C - 92% 0.13kPa
16:00
-0.1°C -1.2°C 2°C - 96% 0.1kPa
17:00
0°C -1.2°C 1.5°C - 100% 0.07kPa
18:00
-0.4°C -1.3°C 0.91°C - 95% 0.06kPa
19:00
-0.7°C -1.3°C 0.31°C - 91% 0.04kPa
20:00
-1.1°C -1.4°C -0.29°C - 86% 0.03kPa
21:00
-0.8°C -1.4°C -0.02°C - 91% 0.03kPa
22:00
-0.5°C -1.4°C 0.25°C - 95% 0.03kPa
23:00
-0.3°C -1.4°C 0.52°C - 100% 0.03kPa
Sun, Apr 12 Sunrise 06:49 Sunset 20:10
24:00
-0.3°C -1.5°C 0.41°C - 100% 0.03kPa
01:00
-0.3°C -1.5°C 0.31°C - 100% 0.03kPa
02:00
-0.4°C -1.5°C 0.21°C - 100% 0.02kPa
How to read: these inputs help produce the derived score; they are not requirements by themselves.

Get Notified of Opportunities

Create your own custom alerts for this location and more.

Create Free Account