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Rule Morning Frost

Leiden - Morning Frost - The Netherlands

Leiden, South Holland, The Netherlands

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
Wind Speed 100% failing
Time Window 88% failing

Currently

Real-time conditions
Soil Temperature9725.9°C
Dew Point3.6°C (low dew point)
Wind Speed3.4m/s (calm conditions)
Cloud Cover100%

Upcoming Opportunities

When all conditions match, PhotoWeather marks an opportunity window.

Times shown in Europe/Amsterdam

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

Dutch winters, when temperatures drop below freezing for extended periods, transform the country's canals and polders into a magical frozen landscape. Hoar frost decorates windmills, creating delicate ice crystal coatings that catch morning light. The historic Elfstedentocht (Eleven Cities Tour) ice-skating conditions—though rare—exemplify the photography potential.

The flat landscape and high humidity create ideal conditions for heavy frost formation. Windmills accumulate intricate ice crystals on their wooden blades and structures. When canals freeze solid, the Netherlands' character transforms—the water that defines the landscape becomes walkable, creating unique perspectives.

What makes Dutch frost photography special:

  • Windmill ice crystals - Hoar frost coating historic structures in delicate white patterns
  • Frozen canal perspective - Unique viewpoints walking on typically impassable water
  • Polder snow simplicity - Minimalist white expanses broken only by windmills and farms
  • Urban canal ice - Amsterdam and Leiden's waterways frozen with footprints and skate tracks

True freezing conditions requiring sustained temperatures below -5°C for multiple days are becoming rarer with climate change. When they occur (typically January-February), act quickly—conditions may last only days. Best frost photography occurs at sunrise when low-angle light illuminates ice crystals. The Kinderdijk, Giethoorn's canals, and rural polders of Friesland offer exceptional winter scenes. Safety first—never venture onto ice without local knowledge of thickness.

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72-hour requirements breakdown

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/Amsterdam
Time Window
Sunrise -45m to +90m
Frost Probability
≥ 60.0%
Wind Speed
≤ 1.5m/s
Wed, Apr 8
04:000%4.8m/s
05:000%4.6m/s
06:000%3.8m/s
07:000%4m/s
08:000%4.2m/s
09:000%4.2m/s
10:000%4.3m/s
11:000%4m/s
12:000%4m/s
13:000%3.5m/s
14:000%3.8m/s
15:000%3.2m/s
16:000%3.3m/s
17:000%3.7m/s
18:000%4m/s
19:000%3.6m/s
20:000%3.4m/s
21:000%3.6m/s
22:000%4.2m/s
23:000%3.9m/s
Thu, Apr 9
24:000%4m/s
01:000%4m/s
02:000%3.9m/s
03:000%3.8m/s
04:000%3.4m/s
05:000%3.3m/s
06:000%3.2m/s
07:000%3.4m/s
08:000%3.4m/s
09:000%3.7m/s
10:000%3.7m/s
11:000%3.8m/s
12:000%3.7m/s
13:000%3.9m/s
14:000%4.4m/s
15:000%5m/s
16:000%5.3m/s
17:000%4.5m/s
18:000%4.3m/s
19:000%3.4m/s
20:000%4.1m/s
21:000%4.5m/s
22:000%4.5m/s
23:000%10m/s
Fri, Apr 10
24:000%7.5m/s
01:000%6m/s
02:000%7.6m/s
03:000%7.6m/s
04:000%8m/s
05:000%7.9m/s
06:000%7.3m/s
07:000%6.8m/s
08:000%5.8m/s
09:000%4.6m/s
10:000%4.4m/s
11:000%3.1m/s
12:000%3m/s
13:000%2.9m/s
14:000%2.7m/s
15:000%3.4m/s
16:000%3.7m/s
17:000%3.1m/s
18:000%2.8m/s
19:000%2.4m/s
20:000%2.1m/s
21:000%2.2m/s
22:000%2.9m/s
23:000%3.6m/s
Sat, Apr 11
24:000%4.1m/s
01:000%4.3m/s
02:000%5.2m/s
03:000%5.1m/s
04:000%5.1m/s
05:000%5.7m/s
06:000%5.7m/s
07:000%5.8m/s
08:000%5.9m/s
09:000%6.3m/s
10:000%6.7m/s
11:000%7.1m/s
12:000%6.9m/s
13:000%6.6m/s
14:000%6.4m/s
15:000%5.2m/s
16:000%4m/s
17:000%2.8m/s
18:000%3.3m/s
19:000%3.7m/s
20:000%4.1m/s
21:000%4.2m/s
22:000%4.2m/s
23:000%4.3m/s
Sun, Apr 12
24:002.8%4.4m/s
01:002.8%4.5m/s
02:002.8%4.6m/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/Amsterdam
Dew Point
°C
Surface Temperature
°C
Temperature
°C
Time Window
Total Cloud Coverage
%
Vapor Pressure Deficit
kPa
Thu, Apr 9 Sunrise 06:58 Sunset 20:29
04:00
3.6°C 9726°C 10°C - 100% 0.45kPa
05:00
3.7°C 9726°C 9.9°C - 83% 0.42kPa
06:00
3.9°C 9726°C 9.6°C - 100% 0.39kPa
07:00
4.2°C 9726°C 9.4°C - 100% 0.35kPa
08:00
4.7°C 9726°C 9.7°C - 100% 0.35kPa
09:00
5.5°C 9726°C 11°C - 100% 0.39kPa
10:00
6.1°C 9726°C 12°C - 100% 0.5kPa
11:00
6.4°C 9726°C 14°C - 88% 0.65kPa
12:00
7.1°C 9726°C 16°C - 18% 0.77kPa
13:00
8.2°C 9726°C 16°C - 100% 0.77kPa
14:00
8.9°C 9726°C 16°C - 99% 0.68kPa
15:00
9.4°C 9726°C 16°C - 100% 0.6kPa
16:00
9.8°C 9726°C 15°C - 100% 0.49kPa
17:00
10°C 9726°C 14°C - 100% 0.36kPa
18:00
10°C 9726°C 13°C - 100% 0.24kPa
19:00
9.8°C 9726°C 13°C - 100% 0.24kPa
20:00
10°C 9726°C 13°C - 100% 0.22kPa
21:00
11°C 9726°C 12°C - 100% 0.11kPa
22:00
9.8°C 9726°C 11°C - 100% 0.1kPa
23:00
8.2°C 9726°C 9.8°C - 100% 0.12kPa
Fri, Apr 10 Sunrise 06:58 Sunset 20:29
24:00
6.4°C 9726°C 8.9°C - 100% 0.18kPa
01:00
6.2°C 9726°C 8.8°C - 79% 0.18kPa
02:00
6.2°C 9726°C 8.8°C - 100% 0.18kPa
03:00
5.4°C 9726°C 8.6°C - 100% 0.22kPa
04:00
4.8°C 9726°C 8.3°C - 100% 0.24kPa
05:00
3.9°C 9726°C 8°C - 100% 0.26kPa
06:00
2.7°C 9726°C 7.8°C - 100% 0.32kPa
07:00
2°C 9726°C 7.6°C - 100% 0.34kPa
08:00
2.2°C 9726°C 7.6°C - 100% 0.33kPa
09:00
2.6°C 9726°C 7.7°C - 100% 0.32kPa
10:00
2.6°C 9726°C 7.9°C - 100% 0.33kPa
11:00
2.4°C 9726°C 8.2°C - 100% 0.36kPa
12:00
2.3°C 9726°C 8.5°C - 100% 0.39kPa
13:00
2.2°C 9726°C 8.5°C - 100% 0.39kPa
14:00
2.1°C 9726°C 8.6°C - 95% 0.41kPa
15:00
2.1°C 9726°C 8.7°C - 54% 0.41kPa
16:00
2.2°C 9726°C 8.7°C - 95% 0.41kPa
17:00
2.1°C 9726°C 8.5°C - 100% 0.4kPa
18:00
2°C 9726°C 8.3°C - 100% 0.39kPa
19:00
1.9°C 9726°C 8.3°C - 100% 0.39kPa
20:00
1.9°C 9726°C 8.5°C - 100% 0.41kPa
21:00
2.5°C 9726°C 8.8°C - 100% 0.4kPa
22:00
3°C 9726°C 8.7°C - 100% 0.37kPa
23:00
2.5°C 9726°C 8.3°C - 100% 0.36kPa
Sat, Apr 11 Sunrise 06:56 Sunset 20:31
24:00
2.5°C 9726°C 8.1°C - 100% 0.35kPa
01:00
2.3°C 9726°C 8.2°C - 100% 0.37kPa
02:00
1.9°C 9726°C 8.4°C - 100% 0.4kPa
03:00
1.6°C 9726°C 8.3°C - 100% 0.41kPa
04:00
1.5°C 9726°C 8.2°C - 100% 0.4kPa
05:00
1.6°C 9726°C 8.1°C - 100% 0.39kPa
06:00
2.1°C 9726°C 8.2°C - 100% 0.37kPa
07:00
2.5°C 9726°C 8.3°C - 100% 0.36kPa
08:00
2.9°C 9726°C 8.6°C - 100% 0.36kPa
09:00
5.3°C 6488°C 9.6°C - 100% 0.3kPa
10:00
7.5°C 3250°C 11°C - 100% 0.23kPa
11:00
9.7°C 12°C 11°C - 100% 0.15kPa
12:00
8.5°C 12°C 11°C - 100% 0.19kPa
13:00
7.2°C 12°C 10°C - 100% 0.23kPa
14:00
5.9°C 11°C 9.7°C - 100% 0.27kPa
15:00
5.4°C 11°C 9.1°C - 100% 0.26kPa
16:00
4.9°C 10°C 8.5°C - 100% 0.24kPa
17:00
4.4°C 9.9°C 7.9°C - 100% 0.23kPa
18:00
3.8°C 9.6°C 7.7°C - 100% 0.25kPa
19:00
3.1°C 9.3°C 7.5°C - 100% 0.27kPa
20:00
2.5°C 9°C 7.3°C - 100% 0.29kPa
21:00
2.1°C 8.7°C 6.9°C - 100% 0.28kPa
22:00
1.8°C 8.5°C 6.5°C - 100% 0.27kPa
23:00
1.4°C 8.2°C 6.1°C - 100% 0.26kPa
Sun, Apr 12 Sunrise 06:54 Sunset 20:32
24:00
1.4°C 7.9°C 6°C - 100% 0.26kPa
01:00
1.4°C 7.7°C 5.9°C - 100% 0.25kPa
02:00
1.3°C 7.4°C 5.8°C - 100% 0.25kPa
03:00
1.8°C 7.7°C 6.9°C - 100% 0.3kPa
How to read: these inputs help produce the derived score; they are not requirements by themselves.

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