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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 93% failing
Time Window 83% failing

Currently

Real-time conditions
Soil Temperature9725.9°C
Dew Point15.1°C (high dew point)
Wind Speed4.1m/s (calm conditions)
Cloud Cover25%

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 80 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, Jul 8
07:000%4.5m/s
08:000%4.4m/s
09:000%4.3m/s
10:000%4.6m/s
11:000%4.6m/s
12:000%4.6m/s
13:000%4.8m/s
14:000%4.5m/s
15:000%4.2m/s
16:000%4.1m/s
17:000%4.1m/s
18:000%4.1m/s
19:000%3.9m/s
20:000%3.8m/s
21:000%3.3m/s
22:000%2.6m/s
23:000%2.2m/s
Thu, Jul 9
24:000%2m/s
01:000%1.9m/s
02:000%1.7m/s
03:000%1.7m/s
04:000%1.5m/s
05:000%1.4m/s
06:000%1m/s
07:000%0.8m/s
08:000%1m/s
09:000%1.4m/s
10:000%1.8m/s
11:000%2.5m/s
12:000%3.2m/s
13:000%3.7m/s
14:000%4.1m/s
15:000%4.5m/s
16:000%4.9m/s
17:000%5.2m/s
18:000%5.4m/s
19:000%4.9m/s
20:000%4m/s
21:000%4.2m/s
22:000%4m/s
23:000%3.6m/s
Fri, Jul 10
24:000%3.5m/s
01:000%3.2m/s
02:000%3.1m/s
03:000%3m/s
04:000%2.9m/s
05:000%2.8m/s
06:000%2.8m/s
07:000%2.7m/s
08:000%2.7m/s
09:000%2.5m/s
10:000%2.4m/s
11:000%2.5m/s
12:000%2.7m/s
13:000%3.6m/s
14:000%5m/s
15:000%6.1m/s
16:000%6.4m/s
17:000%6.4m/s
18:000%6.2m/s
19:000%6.5m/s
20:000%6.2m/s
21:000%4.9m/s
22:000%3.7m/s
23:000%2.4m/s
Sat, Jul 11
24:000%2.5m/s
01:000%2.7m/s
02:000%2.8m/s
03:000%3m/s
04:000%3.1m/s
05:000%3.2m/s
06:000%3.6m/s
07:000%4m/s
08:000%4.4m/s
09:000%4.8m/s
10:000%5.2m/s
11:000%5.5m/s
12:000%5.1m/s
13:000%4.6m/s
14:000%4.2m/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
Wed, Jul 8 Sunrise 05:31 Sunset 22:01
16:00
15°C 9726°C 19°C - 25% 0.54kPa
17:00
15°C 9726°C 19°C - 19% 0.54kPa
18:00
15°C 9726°C 19°C - 18% 0.54kPa
19:00
15°C 9726°C 19°C - 10% 0.53kPa
20:00
15°C 9726°C 19°C - 5% 0.5kPa
21:00
15°C 9726°C 19°C - 5% 0.44kPa
22:00
15°C 9726°C 18°C - 5% 0.37kPa
23:00
15°C 9726°C 18°C - 5% 0.32kPa
Thu, Jul 9 Sunrise 05:31 Sunset 22:01
24:00
15°C 9726°C 18°C - 5% 0.31kPa
01:00
15°C 9726°C 17°C - 0% 0.3kPa
02:00
15°C 9726°C 17°C - 0% 0.3kPa
03:00
14°C 9726°C 17°C - 0% 0.29kPa
04:00
14°C 9726°C 17°C - 0% 0.29kPa
05:00
14°C 9726°C 17°C - 0% 0.28kPa
06:00
14°C 9726°C 17°C - 4% 0.29kPa
07:00
14°C 9726°C 17°C - 5% 0.35kPa
08:00
14°C 9726°C 18°C - 1% 0.47kPa
09:00
14°C 9726°C 19°C - 5% 0.6kPa
10:00
14°C 9726°C 20°C - 5% 0.73kPa
11:00
14°C 9726°C 21°C - 5% 0.79kPa
12:00
15°C 9726°C 21°C - 5% 0.79kPa
13:00
15°C 9726°C 21°C - 18% 0.78kPa
14:00
15°C 9726°C 21°C - 19% 0.81kPa
15:00
15°C 9726°C 21°C - 15% 0.82kPa
16:00
15°C 9726°C 21°C - 12% 0.8kPa
17:00
16°C 9726°C 22°C - 19% 0.78kPa
18:00
16°C 9726°C 22°C - 19% 0.78kPa
19:00
16°C 9726°C 22°C - 19% 0.83kPa
20:00
16°C 9726°C 23°C - 5% 1kPa
21:00
16°C 9726°C 23°C - 70% 1kPa
22:00
15°C 9726°C 22°C - 88% 0.84kPa
23:00
15°C 9726°C 20°C - 93% 0.69kPa
Fri, Jul 10 Sunrise 05:32 Sunset 22:01
24:00
15°C 9726°C 20°C - 99% 0.62kPa
01:00
15°C 9726°C 20°C - 100% 0.55kPa
02:00
15°C 9726°C 19°C - 100% 0.5kPa
03:00
15°C 9726°C 19°C - 100% 0.45kPa
04:00
14°C 9726°C 18°C - 79% 0.43kPa
05:00
14°C 9726°C 18°C - 28% 0.42kPa
06:00
13°C 9726°C 17°C - 32% 0.43kPa
07:00
13°C 9726°C 18°C - 5% 0.52kPa
08:00
13°C 9726°C 19°C - 5% 0.67kPa
09:00
13°C 9726°C 20°C - 5% 0.85kPa
10:00
14°C 9726°C 22°C - 10% 1kPa
11:00
14°C 9726°C 23°C - 3% 1.2kPa
12:00
14°C 9726°C 24°C - 0% 1.3kPa
13:00
15°C 9726°C 24°C - 50% 1.3kPa
14:00
16°C 9726°C 24°C - 92% 1.2kPa
15:00
16°C 9726°C 23°C - 38% 1kPa
16:00
16°C 9726°C 23°C - 15% 1kPa
17:00
16°C 9726°C 23°C - 17% 1kPa
18:00
16°C 9726°C 24°C - 3% 1.2kPa
19:00
16°C 9726°C 24°C - 0% 1.2kPa
20:00
16°C 9726°C 23°C - 0% 1.1kPa
21:00
16°C 6491°C 21°C - 0% 0.71kPa
22:00
15°C 3256°C 19°C - 0% 0.42kPa
23:00
14°C 20°C 16°C - 0% 0.2kPa
Sat, Jul 11 Sunrise 05:33 Sunset 22:00
24:00
14°C 20°C 17°C - 0% 0.31kPa
01:00
14°C 20°C 18°C - 0% 0.44kPa
02:00
14°C 20°C 19°C - 0% 0.59kPa
03:00
14°C 20°C 21°C - 2% 0.89kPa
04:00
14°C 21°C 23°C - 3% 1.3kPa
05:00
13°C 21°C 25°C - 5% 1.7kPa
06:00
13°C 22°C 26°C - 3% 1.9kPa
07:00
12°C 22°C 27°C - 2% 2.1kPa
08:00
12°C 23°C 28°C - 0% 2.3kPa
09:00
13°C 23°C 27°C - 0% 2.1kPa
10:00
13°C 24°C 26°C - 0% 1.9kPa
11:00
14°C 24°C 26°C - 0% 1.7kPa
12:00
13°C 24°C 26°C - 0% 1.8kPa
13:00
13°C 24°C 26°C - 0% 1.9kPa
14:00
12°C 25°C 26°C - 0% 2kPa
15:00
14°C 24°C 24°C - 0% 1.5kPa
How to read: these inputs help produce the derived score; they are not requirements by themselves.

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