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More Morning Frost in Southern Finland
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Rule Morning Frost

Teijo - Morning Frost - Southern Finland

Matildedal, 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 Temperature14.9°C
Dew Point6.0°C (moderate dew point)
Wind Speed7.1m/s (moderate winds)
Cloud Cover28%

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 79 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
08:00✕0%4.7m/s
09:00✕0%5.6m/s
10:00✕0%5.9m/s
11:00✕0%6.4m/s
12:00✕0%6.4m/s
13:00✕0%7.1m/s
14:00✕0%6.9m/s
15:00✕0%7m/s
16:00✕0%7.1m/s
17:00✕0%7.2m/s
18:00✕0%6.6m/s
19:00✕0%6.3m/s
20:00✕0%5.6m/s
21:00✕0%5.4m/s
22:00✕0%4.7m/s
23:00✕0%3.9m/s
Mon, May 25
24:00✕0%3.1m/s
01:00✕0%2.6m/s
02:00✕0%2.6m/s
03:00✓0%2m/s
04:00✓0%1.9m/s
05:00✓0%3.5m/s
06:00✕0%3.4m/s
07:00✕0%3.5m/s
08:00✕0%3.5m/s
09:00✕0%4.8m/s
10:00✕0%5.9m/s
11:00✕0%6m/s
12:00✕0%6.8m/s
13:00✕0%7.3m/s
14:00✕0%7.3m/s
15:00✕0%7.6m/s
16:00✕0%7.4m/s
17:00✕0%7.1m/s
18:00✕0%6.7m/s
19:00✕0%5.9m/s
20:00✕0%5m/s
21:00✕0%4.9m/s
22:00✕0%4m/s
23:00✕0%3.4m/s
Tue, May 26
24:00✕0%3.6m/s
01:00✕0%3.1m/s
02:00✕0%2.5m/s
03:00✓0%2.5m/s
04:00✓0%2.6m/s
05:00✓0%2.4m/s
06:00✕0%2.3m/s
07:00✕0%3.2m/s
08:00✕0%3.8m/s
09:00✕0%4.5m/s
10:00✕0%5.4m/s
11:00✕0%5.8m/s
12:00✕0%6.2m/s
13:00✕0%6.5m/s
14:00✕0%6.7m/s
15:00✕0%6.6m/s
16:00✕0%6.2m/s
17:00✕0%6.3m/s
18:00✕0%5.3m/s
19:00✕0%4.9m/s
20:00✕0%5.8m/s
21:00✕0%4.6m/s
22:00✕0%6.4m/s
23:00✕0%8.2m/s
Wed, May 27
24:00✕0%10m/s
01:00✕0%9.6m/s
02:00✕0%9.3m/s
03:00✓0%8.9m/s
04:00✓0%8.4m/s
05:00✓0%7.9m/s
06:00✕0%7.3m/s
07:00✕0%8.3m/s
08:00✕0%9.2m/s
09:00✕0%10m/s
10:00✕0%9.9m/s
11:00✕0%9.7m/s
12:00✕0%9.5m/s
13:00✕0%9.9m/s
14:00✕0%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/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 22:21
16:00
6°C 15°C 18°C - 28% 1.1kPa
17:00
6.1°C 15°C 18°C - 18% 1.1kPa
18:00
6.1°C 15°C 18°C - 0% 1.1kPa
19:00
6.3°C 15°C 18°C - 0% 1.1kPa
20:00
6.1°C 15°C 17°C - 0% 0.96kPa
21:00
6.2°C 15°C 15°C - 3% 0.76kPa
22:00
6.2°C 15°C 13°C - 47% 0.59kPa
23:00 ☾
6.1°C 15°C 12°C - 80% 0.44kPa
Mon, May 25 Sunrise 04:30 Sunset 22:21
24:00 ☾
6.3°C 14°C 10°C - 100% 0.3kPa
01:00 ☾
6.1°C 14°C 11°C - 89% 0.34kPa
02:00 ☾
6.1°C 14°C 11°C - 100% 0.36kPa
03:00 ☾
6°C 13°C 9.9°C - 100% 0.29kPa
04:00 ☾
6°C 13°C 11°C - 100% 0.37kPa
05:00
5.1°C 13°C 12°C - 94% 0.48kPa
06:00
4.2°C 13°C 11°C - 100% 0.5kPa
07:00
3.6°C 12°C 11°C - 100% 0.55kPa
08:00
3.3°C 12°C 11°C - 100% 0.52kPa
09:00
2.5°C 12°C 12°C - 100% 0.64kPa
10:00
0.5°C 12°C 13°C - 100% 0.87kPa
11:00
-0.6°C 12°C 14°C - 100% 1kPa
12:00
-1.2°C 13°C 15°C - 100% 1.1kPa
13:00
-1.1°C 13°C 15°C - 98% 1.2kPa
14:00
-0.9°C 13°C 16°C - 78% 1.2kPa
15:00
-0.6°C 14°C 16°C - 7% 1.2kPa
16:00
0°C 14°C 16°C - 49% 1.2kPa
17:00
1°C 14°C 16°C - 49% 1.1kPa
18:00
1.3°C 14°C 15°C - 39% 1.1kPa
19:00
1.8°C 14°C 15°C - 39% 0.99kPa
20:00
2.3°C 14°C 14°C - 88% 0.85kPa
21:00
2.4°C 14°C 12°C - 86% 0.7kPa
22:00
2.7°C 14°C 11°C - 100% 0.56kPa
23:00 ☾
3°C 13°C 10°C - 100% 0.47kPa
Tue, May 26 Sunrise 04:28 Sunset 22:23
24:00 ☾
3.5°C 13°C 9°C - 100% 0.36kPa
01:00 ☾
3.7°C 12°C 9.7°C - 71% 0.41kPa
02:00 ☾
4.5°C 12°C 8.6°C - 43% 0.27kPa
03:00 ☾
5.5°C 12°C 7.2°C - 20% 0.11kPa
04:00 ☾
6.1°C 11°C 6.8°C - 5% 0.04kPa
05:00
5.8°C 11°C 6.6°C - 9% 0.05kPa
06:00
5.1°C 11°C 7.9°C - 6% 0.18kPa
07:00
4.4°C 10°C 9.9°C - 5% 0.38kPa
08:00
5.1°C 11°C 12°C - 16% 0.52kPa
09:00
4.7°C 11°C 14°C - 5% 0.7kPa
10:00
3.8°C 11°C 15°C - 5% 0.87kPa
11:00
3.4°C 12°C 16°C - 20% 1kPa
12:00
3.3°C 12°C 16°C - 14% 1.1kPa
13:00
2.5°C 12°C 17°C - 6% 1.2kPa
14:00
2°C 13°C 17°C - 5% 1.2kPa
15:00
1.7°C 13°C 17°C - 5% 1.2kPa
16:00
1.5°C 14°C 17°C - 12% 1.3kPa
17:00
2.1°C 14°C 17°C - 100% 1.2kPa
18:00
2.9°C 14°C 15°C - 100% 0.99kPa
19:00
2.7°C 14°C 15°C - 100% 0.91kPa
20:00
4.3°C 14°C 13°C - 100% 0.62kPa
21:00
5.8°C 14°C 9.9°C - 100% 0.3kPa
22:00
5.6°C 3251°C 9.4°C - 100% 0.27kPa
23:00 ☾
5.3°C 6488°C 8.8°C - 100% 0.24kPa
Wed, May 27 Sunrise 04:26 Sunset 22:25
24:00 ☾
5.1°C 9726°C 8.2°C - 100% 0.21kPa
01:00 ☾
5.1°C 9726°C 8.4°C - 95% 0.22kPa
02:00 ☾
5.2°C 9726°C 8.6°C - 91% 0.23kPa
03:00 ☾
5.2°C 9726°C 8.8°C - 86% 0.24kPa
04:00 ☾
5°C 9726°C 9.3°C - 91% 0.3kPa
05:00
4.6°C 9726°C 9.8°C - 95% 0.36kPa
06:00
4.3°C 9726°C 10°C - 100% 0.43kPa
07:00
4.2°C 9726°C 11°C - 100% 0.46kPa
08:00
4.2°C 9726°C 11°C - 100% 0.5kPa
09:00
4.2°C 9726°C 12°C - 100% 0.53kPa
10:00
3.3°C 9726°C 12°C - 100% 0.63kPa
11:00
2.2°C 9726°C 13°C - 100% 0.74kPa
12:00
1°C 9726°C 13°C - 100% 0.85kPa
13:00
1.7°C 9726°C 12°C - 95% 0.75kPa
14:00
2.4°C 9726°C 12°C - 90% 0.66kPa
15:00
2.9°C 9726°C 11°C - 84% 0.57kPa
How to read: these inputs help produce the derived score; they are not requirements by themselves.

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