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More Morning Frost in Southern Finland
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Rule Morning Frost

Kurjenrahka - Morning Frost - Southern Finland

Turku, Southwest Finland, 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 100% failing
Time Window 88% failing

Currently

Real-time conditions
Frost Probability
0%
Soil Temperature14.5°C
Dew Point6.7°C (moderate dew point)
Wind Speed7.7m/s (moderate winds)
Cloud Cover11%

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 80 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
Sun, May 24
07:00✕0%4.7m/s
08:00✕0%5.6m/s
09:00✕0%6.2m/s
10:00✕0%5.8m/s
11:00✕0%6.8m/s
12:00✕0%7.6m/s
13:00✕0%7.4m/s
14:00✕0%7.6m/s
15:00✕0%7.6m/s
16:00✕0%7.7m/s
17:00✕0%7.3m/s
18:00✕0%6.8m/s
19:00✕0%6.1m/s
20:00✕0%5.8m/s
21:00✕0%5m/s
22:00✕0%3.9m/s
23:00✕0%2.8m/s
Mon, May 25
24:00✕0%2.4m/s
01:00✕0%2m/s
02:00✕0%2.1m/s
03:00✓0%1.8m/s
04:00✓0%4.9m/s
05:00✓0%4.4m/s
06:00✕0%3.3m/s
07:00✕0%3.8m/s
08:00✕0%4.5m/s
09:00✕0%5.6m/s
10:00✕0%6.1m/s
11:00✕0%6.6m/s
12:00✕0%7.3m/s
13:00✕0%7.6m/s
14:00✕0%7.7m/s
15:00✕0%7.9m/s
16:00✕0%7.9m/s
17:00✕0%7.4m/s
18:00✕0%6.8m/s
19:00✕0%5.7m/s
20:00✕0%4.5m/s
21:00✕0%4.5m/s
22:00✕0%3.5m/s
23:00✕0%3.6m/s
Tue, May 26
24:00✕0%3.9m/s
01:00✕0%3.1m/s
02:00✕0%2.1m/s
03:00✓0%2.2m/s
04:00✓0%2.1m/s
05:00✓0%2m/s
06:00✕0%1.9m/s
07:00✕0%3.2m/s
08:00✕0%3.9m/s
09:00✕0%5.1m/s
10:00✕0%5.3m/s
11:00✕0%5.8m/s
12:00✕0%6m/s
13:00✕0%6.5m/s
14:00✕0%6.5m/s
15:00✕0%6.1m/s
16:00✕0%5.9m/s
17:00✕0%6.1m/s
18:00✕0%5.2m/s
19:00✕0%6.4m/s
20:00✕0%5.1m/s
21:00✕0%4.7m/s
22:00✕0%5.1m/s
23:00✕0%5.5m/s
Wed, May 27
24:00✕0%5.9m/s
01:00✕0%5.7m/s
02:00✕0%5.5m/s
03:00✓0%5.3m/s
04:00✓0%5.3m/s
05:00✓0%5.3m/s
06:00✕0%5.3m/s
07:00✕0%5.8m/s
08:00✕0%6.3m/s
09:00✕0%6.7m/s
10:00✕0%6.8m/s
11:00✕0%6.9m/s
12:00✕0%6.9m/s
13:00✕0%6.7m/s
14:00✕0%6.4m/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/Helsinki
Dew Point
°C
Surface Temperature
°C
Temperature
°C
Time Window
Total Cloud Coverage
%
Vapor Pressure Deficit
kPa
Sun, May 24 Sunrise 04:30 Sunset 22:26
16:00
6.7°C 14°C 17°C - 11% 0.97kPa
17:00
6.5°C 15°C 17°C - 0% 0.98kPa
18:00
6.7°C 15°C 17°C - 0% 1kPa
19:00
6.4°C 15°C 17°C - 0% 0.96kPa
20:00
6.5°C 15°C 16°C - 5% 0.8kPa
21:00
6.5°C 15°C 14°C - 8% 0.66kPa
22:00
6.4°C 15°C 13°C - 26% 0.5kPa
23:00 ☾
6.5°C 14°C 10°C - 7% 0.26kPa
Mon, May 25 Sunrise 04:30 Sunset 22:26
24:00 ☾
6.3°C 14°C 9.2°C - 68% 0.21kPa
01:00 ☾
6.3°C 13°C 10°C - 84% 0.29kPa
02:00 ☾
6.2°C 13°C 9.7°C - 100% 0.26kPa
03:00 ☾
6°C 13°C 11°C - 100% 0.36kPa
04:00 ☾
5.5°C 12°C 11°C - 100% 0.43kPa
05:00
4.8°C 12°C 10°C - 100% 0.38kPa
06:00
4.6°C 12°C 9.6°C - 100% 0.35kPa
07:00
4.3°C 12°C 9.7°C - 100% 0.37kPa
08:00
3.5°C 11°C 11°C - 100% 0.49kPa
09:00
2.2°C 12°C 12°C - 100% 0.64kPa
10:00
1.2°C 12°C 12°C - 100% 0.77kPa
11:00
0.2°C 12°C 13°C - 97% 0.9kPa
12:00
0.5°C 12°C 14°C - 100% 0.94kPa
13:00
0.7°C 12°C 14°C - 83% 0.96kPa
14:00
0.9°C 13°C 14°C - 53% 0.99kPa
15:00
1.3°C 13°C 15°C - 5% 1kPa
16:00
1.9°C 13°C 15°C - 5% 0.98kPa
17:00
2°C 14°C 15°C - 9% 0.98kPa
18:00
2.3°C 14°C 15°C - 71% 0.93kPa
19:00
2.9°C 14°C 14°C - 95% 0.84kPa
20:00
3.1°C 14°C 13°C - 97% 0.73kPa
21:00
3.4°C 13°C 12°C - 97% 0.59kPa
22:00
3.1°C 13°C 10°C - 39% 0.5kPa
23:00 ☾
3.7°C 13°C 8.7°C - 100% 0.33kPa
Tue, May 26 Sunrise 04:28 Sunset 22:28
24:00 ☾
3.9°C 12°C 9.2°C - 100% 0.35kPa
01:00 ☾
4.8°C 12°C 9.5°C - 100% 0.33kPa
02:00 ☾
5.7°C 12°C 9°C - 12% 0.23kPa
03:00 ☾
5.9°C 11°C 7.3°C - 10% 0.1kPa
04:00 ☾
5.4°C 11°C 6.9°C - 5% 0.1kPa
05:00
4.9°C 10°C 6.7°C - 12% 0.12kPa
06:00
5.2°C 10°C 7.7°C - 7% 0.17kPa
07:00
6°C 10°C 9.9°C - 15% 0.28kPa
08:00
5.3°C 10°C 12°C - 6% 0.48kPa
09:00
4.5°C 10°C 13°C - 5% 0.64kPa
10:00
4.1°C 11°C 14°C - 5% 0.78kPa
11:00
4°C 11°C 15°C - 5% 0.86kPa
12:00
3.6°C 12°C 15°C - 5% 0.94kPa
13:00
3.2°C 12°C 15°C - 5% 0.97kPa
14:00
2.7°C 13°C 15°C - 5% 1kPa
15:00
2.4°C 13°C 16°C - 21% 1.1kPa
16:00
3°C 13°C 16°C - 8% 1kPa
17:00
3.4°C 14°C 15°C - 100% 0.96kPa
18:00
3.3°C 14°C 14°C - 97% 0.83kPa
19:00
4.6°C 14°C 13°C - 100% 0.68kPa
20:00
5.4°C 14°C 11°C - 100% 0.4kPa
21:00
5.6°C 13°C 10°C - 100% 0.32kPa
22:00
5.2°C 12°C 9.3°C - 100% 0.29kPa
23:00 ☾
4.9°C 11°C 8.6°C - 100% 0.25kPa
Wed, May 27 Sunrise 04:26 Sunset 22:30
24:00 ☾
4.5°C 10°C 7.9°C - 100% 0.22kPa
01:00 ☾
4.6°C 10°C 8.1°C - 100% 0.23kPa
02:00 ☾
4.7°C 10°C 8.3°C - 100% 0.24kPa
03:00 ☾
4.8°C 9.9°C 8.5°C - 100% 0.25kPa
04:00 ☾
4.1°C 10°C 10°C - 98% 0.43kPa
05:00
2.9°C 10°C 12°C - 96% 0.65kPa
06:00
1°C 10°C 14°C - 93% 0.92kPa
07:00
0.9°C 11°C 14°C - 96% 0.98kPa
08:00
0.8°C 11°C 15°C - 98% 1.1kPa
09:00
0.6°C 11°C 15°C - 100% 1.1kPa
10:00
0.1°C 12°C 15°C - 99% 1.1kPa
11:00
-0.4°C 12°C 15°C - 98% 1.1kPa
12:00
-0.9°C 12°C 15°C - 97% 1.1kPa
13:00
-0.2°C 12°C 14°C - 73% 0.97kPa
14:00
0.2°C 12°C 13°C - 49% 0.83kPa
15:00
0.5°C 12°C 11°C - 26% 0.71kPa
How to read: these inputs help produce the derived score; they are not requirements by themselves.

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