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More Morning Frost in Southern Finland
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Rule Morning Frost

Helsinki - Morning Frost - Southern Finland

Helsingfors, Uusimaa, Finland

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 88% failing

Currently

Real-time conditions
Frost Probability
0%
Soil Temperature12.1°C
Dew Point12.1°C (moderate dew point)
Wind Speed1.7m/s (calm conditions)
Cloud Cover100%

Upcoming Opportunities

When all conditions match, PhotoWeather marks an opportunity window.

Times shown in Europe/Helsinki

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 Southern Finland's dramatic frost photography opportunities. From November through March, the region's lakes, forests, and wetlands transform under hoar frost and ice formations, with temperatures regularly dropping to -15°C or colder.

What makes Southern Finland special for frost photography:

  • Lake ice formations - Vesijärvi and Saimaa develop intricate ice patterns and frozen shoreline details
  • Torronsuo's frozen bog - The region's largest raised bog becomes an otherworldly landscape of frosted sphagnum and ice-covered pools
  • Nuuksio forest frost - Hoar frost on birch trees and frozen forest streams create intimate woodland scenes
  • Accessible winter locations - All major frost photography sites within 2 hours of Helsinki

Peak frost conditions occur during stable high-pressure systems when clear nights drop temperatures well below freezing while daytime sun creates backlit opportunities. Nuuksio's mixed forests develop heavy hoar frost on birch branches, transforming familiar trails into sparkling winter scenes. Torronsuo National Park's boardwalks traverse frosted bog landscapes where every sedge and shrub carries ice crystals. The region's thousands of lakes create endless shoreline compositions—ice formations along reed beds, frozen spray patterns, and geometric crack patterns in smooth ice. The forecast identifies calm, clear nights with appropriate temperature drops, then tracks morning visibility to ensure you can photograph the frost before midday sun melts the formations.

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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/Helsinki
Time Window
Sunrise -45m to +90m
Frost Probability
≥ 60.0%
Wind Speed
≤ 1.5m/s
Tue, Jul 7
17:00✕0%4.2m/s
18:00✕0%4.3m/s
19:00✕0%4.1m/s
20:00✕0%3.2m/s
21:00✕0%2.9m/s
22:00✕0%2.3m/s
23:00✕0%1.8m/s
Wed, Jul 8
24:00✕0%0.97m/s
01:00✕0%1.3m/s
02:00✕0%1m/s
03:00✓0%1.3m/s
04:00✓0%1.5m/s
05:00✓0%1.9m/s
06:00✕0%2.3m/s
07:00✕0%2.2m/s
08:00✕0%2.6m/s
09:00✕0%2.1m/s
10:00✕0%2.2m/s
11:00✕0%1.9m/s
12:00✕0%1.8m/s
13:00✕0%1.3m/s
14:00✕0%1.2m/s
15:00✕0%1.5m/s
16:00✕0%1.5m/s
17:00✕0%1.7m/s
18:00✕0%3m/s
19:00✕0%4m/s
20:00✕0%3.6m/s
21:00✕0%2.5m/s
22:00✕0%3.5m/s
23:00✕0%3.9m/s
Thu, Jul 9
24:00✕0%4.4m/s
01:00✕0%4.7m/s
02:00✕0%5.3m/s
03:00✓0%5.1m/s
04:00✓0%5.7m/s
05:00✓0%6.3m/s
06:00✕0%6.3m/s
07:00✕0%6.7m/s
08:00✕0%7.3m/s
09:00✕0%7.2m/s
10:00✕0%6.5m/s
11:00✕0%5.6m/s
12:00✕0%4.9m/s
13:00✕0%4.5m/s
14:00✕0%4.5m/s
15:00✕0%4.6m/s
16:00✕0%4.2m/s
17:00✕0%3.6m/s
18:00✕0%2.9m/s
19:00✕0%2.8m/s
20:00✕0%2m/s
21:00✕0%1.8m/s
22:00✕0%2.3m/s
23:00✕0%2.3m/s
Fri, Jul 10
24:00✕0%2.5m/s
01:00✕0%2.6m/s
02:00✕0%2.7m/s
03:00✓0%2.7m/s
04:00✓0%2.5m/s
05:00✓0%2.4m/s
06:00✕0%2.3m/s
07:00✕0%2.3m/s
08:00✕0%2.7m/s
09:00✕0%3.1m/s
10:00✕0%3.7m/s
11:00✕0%3.9m/s
12:00✕0%4.5m/s
13:00✕0%4.5m/s
14:00✕0%4.2m/s
15:00✕0%4.3m/s
16:00✕0%4.3m/s
17:00✕0%3.7m/s
18:00✕0%3.6m/s
19:00✕0%2.9m/s
20:00✕0%1.9m/s
21:00✕0%1.5m/s
22:00✕0%2.9m/s
23:00✕0%4.2m/s
Sat, Jul 11
24:00✕0%5.6m/s
01:00✕0%5.5m/s
02:00✕0%5.4m/s
03:00✓0%5.3m/s
04:00✓0%5.2m/s
05:00✓0%5.1m/s
06:00✕0%5m/s
07:00✕0%4.4m/s
08:00✕0%3.7m/s
09:00✕0%3.1m/s
10:00✕0%2.5m/s
11:00✕0%1.8m/s
12:00✕0%1.2m/s
13:00✕0%0.9m/s
14:00✕0%0.63m/s
15:00✕0%0.37m/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/Helsinki
Dew Point
°C
Surface Temperature
°C
Temperature
°C
Time Window
Total Cloud Coverage
%
Vapor Pressure Deficit
kPa
Wed, Jul 8 Sunrise 04:10 Sunset 22:39
17:00
12°C 12°C 15°C - 100% 0.34kPa
18:00
13°C 12°C 15°C - 100% 0.25kPa
19:00
12°C 12°C 15°C - 100% 0.31kPa
20:00
11°C 12°C 15°C - 100% 0.32kPa
21:00
11°C 12°C 13°C - 100% 0.21kPa
22:00
11°C 12°C 13°C - 100% 0.21kPa
23:00 ☾
11°C 12°C 13°C - 100% 0.23kPa
Thu, Jul 9 Sunrise 04:10 Sunset 22:39
24:00 ☾
10°C 12°C 13°C - 100% 0.3kPa
01:00 ☾
9.8°C 12°C 14°C - 100% 0.36kPa
02:00 ☾
9.6°C 12°C 14°C - 100% 0.39kPa
03:00 ☾
10°C 12°C 13°C - 100% 0.28kPa
04:00 ☾
10°C 12°C 12°C - 100% 0.16kPa
05:00
11°C 12°C 12°C - 100% 0.13kPa
06:00
11°C 12°C 12°C - 100% 0.12kPa
07:00
11°C 12°C 12°C - 100% 0.1kPa
08:00
11°C 12°C 12°C - 100% 0.08kPa
09:00
11°C 12°C 12°C - 100% 0.06kPa
10:00
12°C 12°C 12°C - 100% 0.06kPa
11:00
12°C 12°C 13°C - 100% 0.07kPa
12:00
12°C 12°C 12°C - 100% 0.05kPa
13:00
12°C 12°C 13°C - 100% 0.04kPa
14:00
13°C 12°C 13°C - 100% 0.04kPa
15:00
13°C 12°C 14°C - 100% 0.06kPa
16:00
13°C 12°C 14°C - 99% 0.1kPa
17:00
14°C 12°C 16°C - 79% 0.24kPa
18:00
13°C 12°C 17°C - 22% 0.48kPa
19:00
12°C 13°C 18°C - 13% 0.7kPa
20:00
13°C 13°C 17°C - 2% 0.49kPa
21:00
13°C 13°C 16°C - 6% 0.3kPa
22:00
13°C 13°C 14°C - 22% 0.18kPa
23:00 ☾
12°C 13°C 13°C - 3% 0.16kPa
Fri, Jul 10 Sunrise 04:11 Sunset 22:38
24:00 ☾
11°C 13°C 13°C - 0% 0.15kPa
01:00 ☾
11°C 13°C 12°C - 0% 0.14kPa
02:00 ☾
11°C 12°C 12°C - 6% 0.11kPa
03:00 ☾
11°C 12°C 12°C - 20% 0.07kPa
04:00 ☾
11°C 12°C 11°C - 44% 0.06kPa
05:00
11°C 12°C 11°C - 17% 0.06kPa
06:00
11°C 12°C 13°C - 100% 0.1kPa
07:00
12°C 12°C 14°C - 100% 0.19kPa
08:00
13°C 12°C 16°C - 100% 0.36kPa
09:00
12°C 12°C 17°C - 63% 0.57kPa
10:00
12°C 13°C 19°C - 2% 0.79kPa
11:00
11°C 13°C 19°C - 30% 0.91kPa
12:00
11°C 13°C 20°C - 100% 0.97kPa
13:00
11°C 14°C 20°C - 100% 0.98kPa
14:00
11°C 14°C 20°C - 100% 1kPa
15:00
11°C 14°C 20°C - 66% 1kPa
16:00
11°C 14°C 20°C - 8% 1.1kPa
17:00
11°C 15°C 20°C - 5% 1.1kPa
18:00
11°C 15°C 21°C - 5% 1.1kPa
19:00
11°C 15°C 20°C - 89% 1kPa
20:00
13°C 15°C 19°C - 100% 0.74kPa
21:00
13°C 15°C 17°C - 100% 0.54kPa
22:00
13°C 3252°C 17°C - 100% 0.39kPa
23:00 ☾
14°C 6489°C 16°C - 100% 0.26kPa
Sat, Jul 11 Sunrise 04:13 Sunset 22:36
24:00 ☾
15°C 9726°C 16°C - 100% 0.13kPa
01:00 ☾
15°C 9726°C 16°C - 96% 0.15kPa
02:00 ☾
15°C 9726°C 16°C - 93% 0.16kPa
03:00 ☾
15°C 9726°C 16°C - 90% 0.18kPa
04:00 ☾
15°C 9726°C 16°C - 88% 0.19kPa
05:00
15°C 9726°C 16°C - 87% 0.2kPa
06:00
15°C 9726°C 16°C - 85% 0.21kPa
07:00
15°C 9726°C 16°C - 90% 0.21kPa
08:00
15°C 9726°C 16°C - 95% 0.2kPa
09:00
15°C 9726°C 17°C - 100% 0.19kPa
10:00
15°C 9726°C 17°C - 99% 0.22kPa
11:00
15°C 9726°C 17°C - 97% 0.24kPa
12:00
15°C 9726°C 18°C - 96% 0.27kPa
13:00
16°C 9726°C 18°C - 97% 0.26kPa
14:00
16°C 9726°C 18°C - 99% 0.25kPa
15:00
16°C 9726°C 18°C - 100% 0.24kPa
16:00
16°C 9726°C 18°C - 100% 0.23kPa
How to read: these inputs help produce the derived score; they are not requirements by themselves.

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