Aulanko - Morning Frost - Southern Finland
Frost crystals on calm, cold mornings near sunrise
No Morning Frost opportunities in the next 14 days
Tip: Scroll down to the 72-hour table to see exactly which condition fails hour by hour.
Currently
Real-time conditionsUpcoming Opportunities
When all conditions match, PhotoWeather marks an opportunity window.
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 ruleThis 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 hourTime Europe/Helsinki | Time Window Sunrise -45m to +90m | Frost Probability ≥ 60.0% | Wind Speed ≤ 1.5m/s |
|---|---|---|---|
| Tue, Apr 14 | |||
| 07:00 | ✓ | 47% | 1.2m/s |
| 08:00 | ✕ | 52% | 1m/s |
| 09:00 | ✕ | 54% | 1.2m/s |
| 10:00 | ✕ | 50% | 1.7m/s |
| 11:00 | ✕ | 45% | 1.9m/s |
| 12:00 | ✕ | 4.4% | 2.2m/s |
| 13:00 | ✕ | 4.2% | 2.2m/s |
| 14:00 | ✕ | 0% | 2.1m/s |
| 15:00 | ✕ | 0% | 2m/s |
| 16:00 | ✕ | 0% | 2m/s |
| 17:00 | ✕ | 0% | 2m/s |
| 18:00 | ✕ | 0% | 2.2m/s |
| 19:00 | ✕ | 0% | 2.1m/s |
| 20:00 | ✕ | 0% | 2.1m/s |
| 21:00 | ✕ | 0% | 1.9m/s |
| 22:00 | ✕ | 0% | 1.7m/s |
| 23:00 | ✕ | 0% | 1.4m/s |
| Wed, Apr 15 | |||
| 24:00 | ✕ | 5% | 1m/s |
| 01:00 | ✕ | 4.9% | 0.93m/s |
| 02:00 | ✕ | 5% | 0.59m/s |
| 03:00 | ✕ | 5% | 0.12m/s |
| 04:00 | ✕ | 52% | 0.58m/s |
| 05:00 | ✓ | 52% | 0.77m/s |
| 06:00 | ✓ | 50% | 1.2m/s |
| 07:00 | ✓ | 50% | 1.5m/s |
| 08:00 | ✕ | 46% | 1.2m/s |
| 09:00 | ✕ | 44% | 1.6m/s |
| 10:00 | ✕ | 45% | 1.8m/s |
| 11:00 | ✕ | 4.4% | 2.3m/s |
| 12:00 | ✕ | 4.2% | 2.6m/s |
| 13:00 | ✕ | 0% | 2.7m/s |
| 14:00 | ✕ | 0% | 2.6m/s |
| 15:00 | ✕ | 0% | 2.3m/s |
| 16:00 | ✕ | 0% | 2.1m/s |
| 17:00 | ✕ | 0% | 2.3m/s |
| 18:00 | ✕ | 0% | 2.8m/s |
| 19:00 | ✕ | 0% | 3m/s |
| 20:00 | ✕ | 0% | 2.8m/s |
| 21:00 | ✕ | 0% | 2.4m/s |
| 22:00 | ✕ | 0% | 2m/s |
| 23:00 | ✕ | 0% | 1.8m/s |
| Thu, Apr 16 | |||
| 24:00 | ✕ | 0% | 1.9m/s |
| 01:00 | ✕ | 3.4% | 1.6m/s |
| 02:00 | ✕ | 3.4% | 1.5m/s |
| 03:00 | ✕ | 3.4% | 1.6m/s |
| 04:00 | ✕ | 2.7% | 1.8m/s |
| 05:00 | ✓ | 29% | 1.8m/s |
| 06:00 | ✓ | 28% | 1.9m/s |
| 07:00 | ✓ | 28% | 2m/s |
| 08:00 | ✕ | 33% | 2.4m/s |
| 09:00 | ✕ | 35% | 3.2m/s |
| 10:00 | ✕ | 33% | 3.4m/s |
| 11:00 | ✕ | 3.2% | 3.5m/s |
| 12:00 | ✕ | 2.9% | 3.2m/s |
| 13:00 | ✕ | 2.9% | 3.1m/s |
| 14:00 | ✕ | 0% | 3.3m/s |
| 15:00 | ✕ | 0% | 3.3m/s |
| 16:00 | ✕ | 0% | 3.1m/s |
| 17:00 | ✕ | 0% | 2.2m/s |
| 18:00 | ✕ | 0% | 1.5m/s |
| 19:00 | ✕ | 0% | 1.5m/s |
| 20:00 | ✕ | 0% | 1.4m/s |
| 21:00 | ✕ | 0% | 1.5m/s |
| 22:00 | ✕ | 0% | 1.5m/s |
| 23:00 | ✕ | 0% | 1.4m/s |
| Fri, Apr 17 | |||
| 24:00 | ✕ | 0% | 1.4m/s |
| 01:00 | ✕ | 0% | 1.5m/s |
| 02:00 | ✕ | 3.4% | 1.5m/s |
| 03:00 | ✕ | 2.9% | 1.3m/s |
| 04:00 | ✕ | 0% | 1.9m/s |
| 05:00 | ✓ | 0% | 2.5m/s |
| 06:00 | ✓ | 0% | 3.1m/s |
| 07:00 | ✓ | 0% | 3.2m/s |
| 08:00 | ✕ | 0% | 3.2m/s |
| 09:00 | ✕ | 0% | 3.3m/s |
| 10:00 | ✕ | 0% | 3.4m/s |
| 11:00 | ✕ | 0% | 3.6m/s |
| 12:00 | ✕ | 0% | 3.8m/s |
| 13:00 | ✕ | 0% | 3.4m/s |
| 14:00 | ✕ | 0% | 3.1m/s |
| 15:00 | ✕ | 0% | 2.8m/s |
| 16:00 | ✕ | 0% | 2.7m/s |
| 17:00 | ✕ | 0% | 2.5m/s |
| 18:00 | ✕ | 0% | 2.4m/s |
| 19:00 | ✕ | 0% | 2.3m/s |
| 20:00 | ✕ | 0% | 2.2m/s |
What does Frost Probability mean?
Inputs that drive the scoreThis 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 |
|---|---|---|---|---|---|---|
| Tue, Apr 14
Sunrise 06:06
Sunset 20:40 | ||||||
| 22:00 ☾ | -0.2°C | 9.1°C | 6.6°C | - | 38% | 0.37kPa |
| 23:00 ☾ | -0.4°C | 8.5°C | 6°C | - | 5% | 0.34kPa |
| Wed, Apr 15
Sunrise 06:06
Sunset 20:40 | ||||||
| 24:00 ☾ | -0.5°C | 7.9°C | 5.6°C | - | 5% | 0.32kPa |
| 01:00 ☾ | -0.8°C | 7.3°C | 5.3°C | - | 12% | 0.31kPa |
| 02:00 ☾ | -1°C | 6.8°C | 5°C | - | 5% | 0.3kPa |
| 03:00 ☾ | -1.2°C | 6.3°C | 4.6°C | - | 0% | 0.29kPa |
| 04:00 ☾ | -1.3°C | 5.8°C | 4.2°C | - | 0% | 0.27kPa |
| 05:00 ☾ | -1.4°C | 5.3°C | 3.8°C | - | 2% | 0.25kPa |
| 06:00 ☾ | -1.4°C | 4.9°C | 3.6°C | - | 6% | 0.23kPa |
| 07:00 | -1.1°C | 4.6°C | 4.1°C | - | 6% | 0.25kPa |
| 08:00 | -0.6°C | 4.6°C | 6.1°C | - | 38% | 0.36kPa |
| 09:00 | -1°C | 5°C | 8.3°C | - | 33% | 0.53kPa |
| 10:00 | -1.1°C | 5.7°C | 10°C | - | 0% | 0.69kPa |
| 11:00 | -0.8°C | 6.5°C | 12°C | - | 0% | 0.8kPa |
| 12:00 | -1.2°C | 7.5°C | 13°C | - | 0% | 0.9kPa |
| 13:00 | -2.9°C | 8.4°C | 13°C | - | 4% | 1.1kPa |
| 14:00 | -3.4°C | 9.3°C | 14°C | - | 5% | 1.1kPa |
| 15:00 | -3°C | 10°C | 14°C | - | 5% | 1.1kPa |
| 16:00 | -2.5°C | 11°C | 14°C | - | 56% | 1.1kPa |
| 17:00 | -2.1°C | 11°C | 14°C | - | 100% | 1.1kPa |
| 18:00 | -1.8°C | 11°C | 14°C | - | 100% | 1kPa |
| 19:00 | -0.7°C | 11°C | 12°C | - | 94% | 0.84kPa |
| 20:00 | -0.3°C | 11°C | 10°C | - | 56% | 0.65kPa |
| 21:00 ☾ | -0.1°C | 10°C | 8°C | - | 33% | 0.46kPa |
| 22:00 ☾ | 0°C | 9.7°C | 7.1°C | - | 6% | 0.39kPa |
| 23:00 ☾ | -0.1°C | 9.1°C | 6.3°C | - | 12% | 0.35kPa |
| Thu, Apr 16
Sunrise 06:03
Sunset 20:42 | ||||||
| 24:00 ☾ | 0.2°C | 8.5°C | 5.7°C | - | 30% | 0.3kPa |
| 01:00 ☾ | 0.3°C | 7.9°C | 5.1°C | - | 97% | 0.25kPa |
| 02:00 ☾ | 0.3°C | 7.3°C | 4.8°C | - | 100% | 0.24kPa |
| 03:00 ☾ | 0.1°C | 6.8°C | 4.5°C | - | 93% | 0.22kPa |
| 04:00 ☾ | 0.1°C | 6.3°C | 4.1°C | - | 90% | 0.2kPa |
| 05:00 ☾ | 0.1°C | 5.8°C | 3.6°C | - | 70% | 0.17kPa |
| 06:00 ☾ | 0.1°C | 5.4°C | 3.1°C | - | 92% | 0.15kPa |
| 07:00 | 0.2°C | 5°C | 3.6°C | - | 100% | 0.17kPa |
| 08:00 | 0.6°C | 5°C | 5.5°C | - | 100% | 0.27kPa |
| 09:00 | 0.8°C | 5.3°C | 7.6°C | - | 93% | 0.4kPa |
| 10:00 | 0.9°C | 5.8°C | 9.4°C | - | 98% | 0.52kPa |
| 11:00 | 1.2°C | 6.5°C | 11°C | - | 100% | 0.6kPa |
| 12:00 | 1.8°C | 7.2°C | 12°C | - | 83% | 0.67kPa |
| 13:00 | 2.1°C | 8°C | 12°C | - | 94% | 0.69kPa |
| 14:00 | 2.3°C | 8.5°C | 12°C | - | 98% | 0.71kPa |
| 15:00 | 2.6°C | 9.1°C | 13°C | - | 89% | 0.75kPa |
| 16:00 | 2.7°C | 9.5°C | 13°C | - | 98% | 0.71kPa |
| 17:00 | 3.4°C | 9.5°C | 11°C | - | 100% | 0.56kPa |
| 18:00 | 4°C | 9.4°C | 10°C | - | 100% | 0.45kPa |
| 19:00 | 4.3°C | 9.3°C | 10°C | - | 100% | 0.4kPa |
| 20:00 | 4.3°C | 9.1°C | 9.5°C | - | 100% | 0.35kPa |
| 21:00 ☾ | 4.3°C | 8.9°C | 9.1°C | - | 100% | 0.32kPa |
| 22:00 ☾ | 4.4°C | 8.7°C | 8.9°C | - | 99% | 0.3kPa |
| 23:00 ☾ | 4.5°C | 8.5°C | 8.7°C | - | 100% | 0.28kPa |
| Fri, Apr 17
Sunrise 06:00
Sunset 20:45 | ||||||
| 24:00 ☾ | 4.3°C | 8.3°C | 8.5°C | - | 100% | 0.27kPa |
| 01:00 ☾ | 4.3°C | 8.1°C | 8.3°C | - | 100% | 0.26kPa |
| 02:00 ☾ | 4.4°C | 8°C | 7.9°C | - | 100% | 0.23kPa |
| 03:00 ☾ | 4.5°C | 7.8°C | 7.6°C | - | 100% | 0.2kPa |
| 04:00 ☾ | 3.6°C | 8°C | 9.4°C | - | 89% | 0.39kPa |
| 05:00 ☾ | 2.1°C | 8.3°C | 11°C | - | 78% | 0.63kPa |
| 06:00 | -0.5°C | 8.6°C | 13°C | - | 67% | 0.93kPa |
| 07:00 | -0.7°C | 9.3°C | 14°C | - | 74% | 1kPa |
| 08:00 | -1°C | 10°C | 14°C | - | 81% | 1.1kPa |
| 09:00 | -1.2°C | 11°C | 15°C | - | 89% | 1.1kPa |
| 10:00 | -1.2°C | 11°C | 15°C | - | 77% | 1.1kPa |
| 11:00 | -1.2°C | 12°C | 14°C | - | 65% | 1.1kPa |
| 12:00 | -1.1°C | 12°C | 14°C | - | 53% | 1kPa |
| 13:00 | -0.6°C | 12°C | 12°C | - | 69% | 0.86kPa |
| 14:00 | -0.3°C | 11°C | 11°C | - | 84% | 0.72kPa |
| 15:00 | -0.2°C | 11°C | 9.6°C | - | 100% | 0.59kPa |
| 16:00 | 0°C | 11°C | 8.8°C | - | 69% | 0.52kPa |
| 17:00 | 0.1°C | 10°C | 8°C | - | 38% | 0.45kPa |
| 18:00 | 0.1°C | 9.6°C | 7.1°C | - | 8% | 0.39kPa |
| 19:00 | -0.2°C | 9°C | 6.3°C | - | 7% | 0.35kPa |
| 20:00 | -0.5°C | 8.4°C | 5.4°C | - | 6% | 0.31kPa |
| 21:00 ☾ | -0.9°C | 7.8°C | 4.6°C | - | 5% | 0.27kPa |
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