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Rule Fog Hunter

Vesijärvi - Fog Hunter - Southern Finland

Lahti, Päijänne Tavastia, Finland

Thick, moody fog for atmospheric forest and landscape shots

Currently

Real-time conditions
Fog Probability
0%
Dewpoint Spread1.0°C
Visibility24134 (Clear)
Relative Humidity94%
Wind Speed3.7m/s (calm conditions)

Upcoming Opportunities

When all conditions match, PhotoWeather marks an opportunity window.

Times shown in Europe/Helsinki
fog weather icon
Next opportunity
Dense Fog at Sunset
Vesijärvi
Today · 23:00–24:00 · 1h window
Medium confidence
61%
🌫️Fog Probability86%
Dewpoint Spread: 0.3°C
Visibility: 4761 (Mist/Haze)
Relative Humidity: 98%
Wind Speed: 2.9m/s (calm conditions)
fog weather icon
Dense Fog
Vesijärvi
Tomorrow · 24:00–01:00
🌫️Fog Probability:86%
Medium

What this forecast looks for

Plain-language explanation from the rule

Southern Finland's lake district and boreal forests create ideal conditions for fog photography. The region's 188,000 lakes, countless bogs, and mixed forests generate reliable morning mist from late summer through autumn.

What makes Southern Finland special for fog photography:

  • Lake fog - Large lakes like Vesijärvi and Saimaa produce dramatic ground fog at dawn
  • Bog mist - Torronsuo and other wetlands create ethereal low-lying fog over boardwalks
  • Forest atmosphere - Nuuksio and Repovesi offer misty woodland scenes with cliff viewpoints
  • Accessibility - Most locations within 2 hours of Helsinki

Peak fog season runs from August through October, with the strongest conditions occurring on calm, clear nights when temperatures drop near the dewpoint. Arrive before sunrise for the most dramatic mist.

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72-hour requirements breakdown

What passed or failed, hour by hour
2matching hours in the next 95 hoursJump to next match
AND logic: all conditions required
Meets requirement
Misses requirement
Time
Europe/Helsinki
Fog Probability
≥ 75.0%
Fri, Jun 5
11:000%
12:000%
13:000%
14:000%
15:000%
16:000%
17:000%
18:000%
19:000%
20:000%
21:000%
22:000%
23:000%
Sat, Jun 6
24:000%
01:000%
02:000%
03:000%
04:0039%
05:0043%
06:000%
07:000%
08:000%
09:000%
10:0044%
11:000%
12:000%
13:0014%
14:0015%
15:0015%
16:000%
17:000%
18:000%
19:000%
20:000%
21:000%
22:0062%
23:0086%
Sun, Jun 7
24:0086%
01:0033%
02:0048%
03:0073%
04:0066%
05:0066%
06:0048%
07:000%
08:000%
09:000%
10:000%
11:000%
12:000%
13:000%
14:000%
15:000%
16:000%
17:000%
18:000%
19:000%
20:000%
21:000%
22:000%
23:000%
Mon, Jun 8
24:000%
01:000%
02:000%
03:000%
04:000%
05:000%
06:000%
07:000%
08:000%
09:000%
10:000%
11:000%
12:000%
13:000%
14:000%
15:000%
16:000%
17:000%
18:000%
19:000%
20:000%
21:000%
22:000%
23:000%
Tue, Jun 9
24:000%
01:000%
02:000%
03:000%
04:000%
05:000%
06:000%
07:000%
08:000%
09:000%
How to read: colored cells show whether each predicate requirement is met; highlighted rows mean the full rule matched (an opportunity).

What does Fog 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
Clear Sky Probability (Ensemble)
%
Dew Point
°C
Rainfall
mm
Relative Humidity
%
Snowfall
cm
Solar Elevation
°
Temperature
°C
Total Precipitation
mm
Vapor Pressure Deficit
kPa
Visibility
m
Wind Gusts
m/s
Wind Speed
m/s
Sat, Jun 6 Sunrise 03:50 Sunset 22:43
11:00
0% 16°C 0.01mm 94% 0cm 45° 17°C 0.06mm 0.12kPa 24134m 8.3m/s 3.7m/s
12:00
0% 16°C 0.02mm 94% 0cm 49° 16°C 0.25mm 0.1kPa 24134m 8.2m/s 3.8m/s
13:00
0% 15°C 0.01mm 95% 0cm 52° 16°C 0.25mm 0.09kPa 24134m 9.3m/s 3.8m/s
14:00
0% 15°C 0.09mm 96% 0cm 51° 16°C 0.38mm 0.07kPa 24134m 10m/s 3.8m/s
15:00
0% 15°C 0mm 96% 0cm 48° 16°C 0.38mm 0.08kPa 24134m 10m/s 3.7m/s
16:00
0% 16°C 0.65mm 93% 0cm 42° 17°C 0.31mm 0.12kPa 9431m 9m/s 4.1m/s
17:00
0% 15°C 3.6mm 98% 0cm 36° 15°C 2.9mm 0.03kPa 753m 11m/s 4.1m/s
18:00
0% 14°C 0.32mm 99% 0cm 29° 15°C 4.4mm 0.02kPa 189m 8.9m/s 3.6m/s
19:00
0% 15°C 0.09mm 98% 0cm 22° 15°C 4.8mm 0.03kPa 235m 10m/s 3.7m/s
20:00
0% 15°C 0.04mm 98% 0cm 15° 15°C 4.8mm 0.03kPa 244m 9m/s 3.9m/s
21:00
0% 14°C 0mm 98% 0cm 8.2° 15°C 4.8mm 0.04kPa 5737m 8.2m/s 3.2m/s
22:00
2% 13°C 0.04mm 98% 0cm 2.8° 14°C 0mm 0.04kPa 21065m 8.2m/s 3.1m/s
23:00 ☾
4% 12°C 0mm 98% 0cm -1.7° 12°C 0.06mm 0.03kPa 4761m 6.6m/s 2.9m/s
Sun, Jun 7 Sunrise 03:50 Sunset 22:43
24:00 ☾
6% 12°C 0.01mm 98% 0cm -4.8° 12°C 0.06mm 0.03kPa 6081m 7.8m/s 3.2m/s
01:00 ☾
8% 12°C 0.02mm 97% 0cm -6.2° 12°C 0.13mm 0.05kPa 24135m 8.9m/s 3.6m/s
02:00 ☾
9% 11°C 0mm 96% 0cm -5.8° 12°C 0.13mm 0.06kPa 24134m 8.8m/s 3.2m/s
03:00 ☾
11% 10°C 0mm 98% 0cm -3.6° 10°C 0.13mm 0.02kPa 24135m 7.2m/s 2.3m/s
04:00
21% 9.5°C 0mm 99% 0cm 0.49° 9.7°C 0mm 0.01kPa 24135m 7.8m/s 2.2m/s
05:00
32% 9.5°C 0mm 99% 0cm 5.2° 9.6°C 0mm 0.01kPa 24135m 8.5m/s 2.4m/s
06:00
42% 10°C 0mm 96% 0cm 11° 11°C 0mm 0.06kPa 24134m 10m/s 2.7m/s
07:00
46% 11°C 0mm 91% 0cm 18° 12°C 0mm 0.13kPa 24135m 9.7m/s 3.2m/s
08:00
51% 11°C 0mm 83% 0cm 25° 14°C 0mm 0.27kPa 24134m 7.4m/s 3.6m/s
09:00
55% 11°C 0mm 71% 0cm 32° 16°C 0mm 0.53kPa 24135m 6.5m/s 3.7m/s
10:00
66% 9.7°C 0mm 58% 0cm 39° 18°C 0mm 0.89kPa 24134m 5.8m/s 3.8m/s
11:00
78% 9.1°C 0mm 51% 0cm 45° 20°C 0mm 1.1kPa 24135m 6.2m/s 4m/s
12:00
89% 8.2°C 0mm 44% 0cm 50° 21°C 0mm 1.4kPa 24134m 7.3m/s 4.5m/s
13:00
88% 7.6°C 0mm 42% 0cm 52° 21°C 0mm 1.4kPa 24134m 7.3m/s 4.9m/s
14:00
86% 7.2°C 0mm 40% 0cm 51° 21°C 0mm 1.5kPa 24135m 7.3m/s 4.7m/s
15:00
85% 6.1°C 0mm 36% 0cm 48° 22°C 0mm 1.7kPa 24135m 7.2m/s 5.3m/s
16:00
80% 5.9°C 0mm 36% 0cm 43° 22°C 0mm 1.7kPa 24135m 7m/s 5m/s
17:00
74% 5.5°C 0mm 35% 0cm 36° 22°C 0mm 1.7kPa 24135m 6.5m/s 4.7m/s
18:00
69% 5.2°C 0mm 35% 0cm 29° 21°C 0mm 1.6kPa 24134m 6.1m/s 4.5m/s
19:00
71% 6.6°C 0mm 40% 0cm 22° 21°C 0mm 1.5kPa 24134m 5.3m/s 3.6m/s
20:00
72% 7.2°C 0mm 45% 0cm 15° 19°C 0mm 1.2kPa 24134m 6.3m/s 3.3m/s
21:00
74% 8.1°C 0mm 56% 0cm 8.4° 17°C 0mm 0.85kPa 24134m 7.6m/s 3.1m/s
22:00
76% 8.7°C 0mm 69% 0cm 2.9° 14°C 0mm 0.5kPa 24134m 7.5m/s 2.7m/s
23:00 ☾
77% 8.6°C 0mm 82% 0cm -1.6° 12°C 0mm 0.25kPa 24134m 6m/s 2.3m/s
Mon, Jun 8 Sunrise 03:48 Sunset 22:44
24:00 ☾
79% 8.5°C 0mm 86% 0cm -4.7° 11°C 0mm 0.19kPa 24134m 1.9m/s 1.7m/s
01:00 ☾
80% 8.3°C 0mm 86% 0cm -6.1° 10°C 0mm 0.17kPa 24135m 1.6m/s 1.6m/s
02:00 ☾
82% 8°C 0mm 87% 0cm -5.7° 10°C 0mm 0.15kPa 24134m 1.1m/s 1.1m/s
03:00 ☾
83% 7.7°C 0mm 88% 0cm -3.5° 9.7°C 0mm 0.15kPa 24134m 0.81m/s 0.78m/s
04:00
71% 7.6°C 0mm 88% 0cm 0.55° 9.6°C 0mm 0.15kPa 24134m 0.61m/s 0.55m/s
05:00
58% 7.8°C 0mm 82% 0cm 5.3° 11°C 0mm 0.23kPa 24134m 0.31m/s 0.37m/s
06:00
46% 8.2°C 0mm 76% 0cm 11° 12°C 0mm 0.34kPa 24135m 0.4m/s 0.42m/s
07:00
39% 8.3°C 0mm 69% 0cm 18° 14°C 0mm 0.49kPa 24134m 0.51m/s 0.43m/s
08:00
31% 8.2°C 0mm 60% 0cm 25° 16°C 0mm 0.73kPa 24134m 0.6m/s 0.42m/s
09:00
24% 8°C 0mm 53% 0cm 32° 18°C 0mm 0.95kPa 24134m 0.5m/s 0.41m/s
10:00
23% 7.6°C 0mm 45% 0cm 39° 20°C 0mm 1.3kPa 24134m 0.7m/s 0.61m/s
11:00
22% 7.1°C 0mm 39% 0cm 45° 22°C 0mm 1.6kPa 24135m 0.91m/s 0.95m/s
12:00
21% 6.9°C 0mm 36% 0cm 50° 23°C 0mm 1.8kPa 24135m 0.9m/s 0.82m/s
13:00
18% 6.8°C 0mm 33% 0cm 52° 24°C 0mm 2kPa 24134m 0.6m/s 0.47m/s
14:00
14% 6.7°C 0mm 32% 0cm 51° 24°C 0mm 2.1kPa 24135m 0.5m/s 0.17m/s
15:00
11% 6.5°C 0mm 32% 0cm 48° 24°C 0mm 2.1kPa 24134m 0.7m/s 0.45m/s
16:00
12% 8.4°C 0mm 46% 0cm 43° 21°C 0mm 1.3kPa 24134m 0.65m/s 0.5m/s
17:00
13% 8.9°C 0mm 59% 0cm 36° 17°C 0mm 0.78kPa 24135m 0.6m/s 0.56m/s
18:00
14% 8.4°C 0mm 73% 0cm 29° 13°C 0mm 0.4kPa 24135m 0.56m/s 0.62m/s
19:00
14% 8.3°C 0mm 76% 0cm 22° 12°C 0mm 0.35kPa 24135m 0.47m/s 0.51m/s
20:00
14% 8.2°C 0mm 78% 0cm 15° 12°C 0mm 0.3kPa 24135m 0.39m/s 0.41m/s
21:00
14% 8.1°C 0mm 81% 0cm 8.5° 11°C 0mm 0.25kPa 24135m 0.31m/s 0.3m/s
22:00
15% 8.5°C 0mm 78% 0cm 3° 12°C 0mm 0.31kPa 24135m 0.52m/s 0.49m/s
23:00 ☾
16% 8.8°C 0mm 76% 0cm -1.5° 13°C 0mm 0.36kPa 24135m 0.73m/s 0.69m/s
Tue, Jun 9 Sunrise 03:47 Sunset 22:46
24:00 ☾
17% 9.1°C 0mm 73% 0cm -4.6° 14°C 0mm 0.43kPa 24135m 0.93m/s 0.88m/s
01:00 ☾
17% 9.4°C 0mm 66% 0cm -6° 16°C 0mm 0.61kPa 24135m 1.3m/s 1m/s
02:00 ☾
17% 9.5°C 0mm 59% 0cm -5.6° 18°C 0mm 0.82kPa 24135m 1.7m/s 1.2m/s
03:00 ☾
17% 9.3°C 0mm 52% 0cm -3.4° 19°C 0mm 1.1kPa 24135m 2m/s 1.3m/s
04:00
18% 9.2°C 0mm 48% 0cm 0.61° 21°C 0mm 1.3kPa 24135m 1.9m/s 1.4m/s
05:00
20% 8.9°C 0mm 43% 0cm 5.3° 22°C 0mm 1.5kPa 24135m 1.7m/s 1.4m/s
06:00
21% 8.5°C 0mm 39% 0cm 11° 23°C 0mm 1.7kPa 24135m 1.6m/s 1.5m/s
07:00
19% 9.9°C 0mm 48% 0cm 18° 21°C 0.08mm 1.3kPa 24135m 3.5m/s 2m/s
08:00
17% 11°C 0mm 57% 0cm 25° 19°C 0.17mm 0.96kPa 24135m 5.5m/s 2.5m/s
09:00
15% 11°C 0mm 66% 0cm 32° 17°C 0.25mm 0.67kPa 24135m 7.4m/s 3.1m/s
10:00
18% 11°C 0mm 64% 0cm 39° 18°C 0.19mm 0.73kPa 24135m 6.7m/s 3.1m/s
How to read: these inputs help produce the derived score; they are not requirements by themselves.

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