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Rule Morning Frost

Haarlem - Morning Frost - The Netherlands

Haarlem, North 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 Temperature10.4°C
Dew Point3.2°C (low dew point)
Wind Speed3.3m/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%4.1m/s
05:004%4.1m/s
06:004%3.5m/s
07:004%3.5m/s
08:004.5%3.8m/s
09:004.5%3.9m/s
10:003.4%4.4m/s
11:000%4.1m/s
12:000%4m/s
13:000%3.8m/s
14:000%4.1m/s
15:000%3.7m/s
16:000%3.8m/s
17:000%3.9m/s
18:000%3.8m/s
19:000%3.8m/s
20:000%3.6m/s
21:000%3.8m/s
22:000%3.7m/s
23:000%3.6m/s
Thu, Apr 9
24:000%3.7m/s
01:000%3.8m/s
02:000%3.5m/s
03:000%3.5m/s
04:000%3.3m/s
05:000%3.1m/s
06:000%3.1m/s
07:000%3.2m/s
08:000%3.3m/s
09:000%3.6m/s
10:000%4.1m/s
11:000%4.1m/s
12:000%4.3m/s
13:000%4.5m/s
14:000%4.6m/s
15:000%5.2m/s
16:000%5.8m/s
17:000%5.3m/s
18:000%5.1m/s
19:000%3.9m/s
20:000%3.2m/s
21:000%3.7m/s
22:000%5m/s
23:000%8.8m/s
Fri, Apr 10
24:000%7m/s
01:000%5.5m/s
02:000%6.8m/s
03:000%6.8m/s
04:000%7.1m/s
05:000%6.8m/s
06:000%6m/s
07:000%5.4m/s
08:000%4.5m/s
09:000%3.9m/s
10:000%4.1m/s
11:000%3.2m/s
12:000%3.3m/s
13:000%2.8m/s
14:000%2.9m/s
15:000%3.8m/s
16:000%3.8m/s
17:000%2.6m/s
18:000%1.8m/s
19:000%1.7m/s
20:000%2.5m/s
21:000%3.3m/s
22:000%3m/s
23:000%3.1m/s
Sat, Apr 11
24:000%4.2m/s
01:000%4.4m/s
02:000%4.4m/s
03:000%4.2m/s
04:000%4.3m/s
05:000%4.7m/s
06:002.8%5.1m/s
07:002.8%5.3m/s
08:002.8%5.2m/s
09:000%6.9m/s
10:000%8.6m/s
11:000%10m/s
12:000%10m/s
13:000%9.7m/s
14:000%9.4m/s
15:000%8.2m/s
16:000%7.1m/s
17:000%5.9m/s
18:000%6.8m/s
19:000%7.6m/s
20:000%8.4m/s
21:000%8.9m/s
22:000%9.4m/s
23:000%9.9m/s
Sun, Apr 12
24:000%10m/s
01:000%10m/s
02:000%10m/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
3.2°C 10°C 9°C - 100% 0.38kPa
05:00
3.2°C 10°C 8.7°C - 95% 0.36kPa
06:00
3.4°C 9.9°C 8.6°C - 97% 0.34kPa
07:00
3.8°C 9.6°C 8.5°C - 100% 0.31kPa
08:00
4.7°C 9.5°C 9.3°C - 100% 0.31kPa
09:00
5.6°C 9.6°C 11°C - 100% 0.4kPa
10:00
6°C 10°C 13°C - 100% 0.56kPa
11:00
6.6°C 11°C 15°C - 79% 0.77kPa
12:00
7.2°C 12°C 17°C - 12% 0.93kPa
13:00
8.2°C 12°C 18°C - 99% 1kPa
14:00
9°C 13°C 19°C - 83% 1kPa
15:00
9.8°C 14°C 18°C - 100% 0.9kPa
16:00
10°C 15°C 17°C - 100% 0.7kPa
17:00
11°C 15°C 16°C - 100% 0.56kPa
18:00
11°C 15°C 15°C - 100% 0.37kPa
19:00
10°C 14°C 13°C - 100% 0.29kPa
20:00
9.9°C 14°C 13°C - 100% 0.26kPa
21:00
10°C 14°C 12°C - 100% 0.16kPa
22:00
10°C 13°C 11°C - 100% 0.1kPa
23:00
8.4°C 13°C 9.9°C - 100% 0.12kPa
Fri, Apr 10 Sunrise 06:58 Sunset 20:29
24:00
6.3°C 12°C 8.7°C - 100% 0.17kPa
01:00
6.2°C 12°C 8.5°C - 100% 0.16kPa
02:00
6.3°C 11°C 8.6°C - 100% 0.16kPa
03:00
5.1°C 11°C 8°C - 100% 0.19kPa
04:00
4.4°C 11°C 7.6°C - 100% 0.21kPa
05:00
4.2°C 10°C 7.4°C - 100% 0.2kPa
06:00
3.3°C 9.8°C 7°C - 100% 0.23kPa
07:00
2.2°C 9.5°C 6.6°C - 100% 0.25kPa
08:00
2.7°C 9.2°C 6.8°C - 100% 0.25kPa
09:00
2.9°C 9.1°C 7.4°C - 100% 0.28kPa
10:00
2.9°C 9.1°C 7.9°C - 100% 0.32kPa
11:00
2.6°C 9.3°C 8.4°C - 100% 0.36kPa
12:00
2.5°C 9.6°C 9°C - 100% 0.42kPa
13:00
2.3°C 10°C 9.4°C - 100% 0.46kPa
14:00
2.3°C 10°C 9.8°C - 100% 0.49kPa
15:00
2.4°C 11°C 9.6°C - 79% 0.46kPa
16:00
2.6°C 11°C 9.1°C - 86% 0.42kPa
17:00
2.4°C 11°C 9.4°C - 100% 0.45kPa
18:00
2.3°C 11°C 9.2°C - 95% 0.44kPa
19:00
2.6°C 11°C 9.1°C - 100% 0.41kPa
20:00
3.3°C 10°C 8.2°C - 100% 0.31kPa
21:00
3.2°C 10°C 6.8°C - 100% 0.21kPa
22:00
2.4°C 9.6°C 6.1°C - 100% 0.22kPa
23:00
2.3°C 9.3°C 7°C - 100% 0.28kPa
Sat, Apr 11 Sunrise 06:55 Sunset 20:30
24:00
2.6°C 9.1°C 7.5°C - 100% 0.3kPa
01:00
2.4°C 8.8°C 7.1°C - 99% 0.28kPa
02:00
2°C 8.6°C 7.2°C - 100% 0.31kPa
03:00
1.7°C 8.4°C 7.1°C - 100% 0.32kPa
04:00
1.3°C 8.2°C 7°C - 100% 0.33kPa
05:00
1°C 8.1°C 6.8°C - 100% 0.33kPa
06:00
1.3°C 7.9°C 7.1°C - 100% 0.33kPa
07:00
1.9°C 7.9°C 7.5°C - 100% 0.33kPa
08:00
2.6°C 7.8°C 8.2°C - 100% 0.35kPa
09:00
5°C 3247°C 8.8°C - 100% 0.26kPa
10:00
7.2°C 6487°C 9.3°C - 100% 0.16kPa
11:00
9.2°C 9726°C 9.9°C - 100% 0.05kPa
12:00
8.3°C 9726°C 9.7°C - 100% 0.11kPa
13:00
7.5°C 9726°C 9.6°C - 100% 0.16kPa
14:00
6.6°C 9726°C 9.4°C - 100% 0.21kPa
15:00
5.6°C 9726°C 8.8°C - 100% 0.22kPa
16:00
4.7°C 9726°C 8.3°C - 100% 0.24kPa
17:00
3.7°C 9726°C 7.7°C - 100% 0.25kPa
18:00
4°C 9726°C 8°C - 100% 0.26kPa
19:00
4.2°C 9726°C 8.3°C - 100% 0.27kPa
20:00
4.4°C 9726°C 8.6°C - 100% 0.28kPa
21:00
4.5°C 9726°C 8.6°C - 100% 0.27kPa
22:00
4.6°C 9726°C 8.5°C - 100% 0.26kPa
23:00
4.7°C 9726°C 8.5°C - 100% 0.25kPa
Sun, Apr 12 Sunrise 06:53 Sunset 20:32
24:00
4.4°C 9726°C 8.1°C - 100% 0.25kPa
01:00
4°C 9726°C 7.8°C - 100% 0.24kPa
02:00
3.7°C 9726°C 7.4°C - 100% 0.24kPa
03:00
3.7°C 9726°C 7.5°C - 99% 0.24kPa
How to read: these inputs help produce the derived score; they are not requirements by themselves.

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