What conditions does Fog Hunter look for?

Fog Probability: ≥ 85.0%. Dewpoint Spread: ≤ 2.0°C. Visibility: ≤ 3000.0m. Wind Speed: ≤ 2.0m/s

How often do conditions match?

There are 4 upcoming opportunity windows in the next 10 days.

More Fog Hunter in Southern Finland

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Rule Fog Hunter

Aulanko - Fog Hunter - Southern Finland

Hämeenlinna, Kanta-Häme, Finland

Thick, moody fog for atmospheric forest and landscape shots

Currently

Real-time conditions

Fog Probability

86%

Dewpoint Spread0.2°C

Visibility6562 (Moderate)

Relative Humidity99%

Wind Speed0.1m/s (calm conditions)

Upcoming Opportunities

When all conditions match, PhotoWeather marks an opportunity window.

Times shown in Europe/Helsinki

Next opportunity

Dense Fog (lingering)

Aulanko

Tomorrow · 23:00–03:00 · 4h window

Medium confidence

63%

🌫️Fog Probability97.2-100%

Dewpoint Spread: 0.5°C

Visibility: 998 (Fog)

Relative Humidity: 97%

Wind Speed: 1.8m/s (calm conditions)

Dense Fog (lingering)

Aulanko

Tue, Feb 10 · 14:00–15:00

🌫️Fog Probability:100%

Medium

Dense Fog (lingering)

Aulanko

Tue, Feb 10 · 23:00–02:00

🌫️Fog Probability:100%

High

Dense Fog (lingering)

Aulanko

Fri, Feb 13 · 23:00–24:00

🌫️Fog Probability:100%

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

8matching hours in the next 72 hoursJump to next match

AND logic: all conditions required

Meets requirement

Misses requirement

Time Europe/Helsinki	Fog Probability ≥ 85.0%	Dewpoint Spread ≤ 2.0°C	Visibility ≤ 3000.0m	Wind Speed ≤ 2.0m/s
Sun, Feb 8
08:00	86%	0.2°C	8126m	0.71m/s
09:00	86%	0.2°C	6562m	0.11m/s
10:00	60%	0.8°C	24134m	0.16m/s
11:00	0%	1.5°C	24134m	0.47m/s
12:00	0%	2.2°C	24135m	0.9m/s
13:00	0%	2.6°C	24134m	1.3m/s
14:00	0%	2.6°C	24134m	1.5m/s
15:00	0%	1.7°C	24134m	1.3m/s
16:00	64%	0.6°C	24134m	1.1m/s
17:00	75%	0.3°C	10909m	1.4m/s
18:00	64%	0.6°C	19836m	1.7m/s
19:00	64%	0.6°C	24134m	1.7m/s
20:00	60%	0.7°C	24071m	1.8m/s
21:00	51%	0.8°C	24135m	2m/s
22:00	67%	0.4°C	17715m	1.9m/s
23:00	71%	0.3°C	8248m	1.9m/s
Mon, Feb 9
24:00	57%	0.5°C	17697m	2.3m/s
01:00	51%	0.8°C	24135m	2.9m/s
02:00	0%	1.2°C	24135m	3.4m/s
03:00	0%	1.2°C	24134m	3.5m/s
04:00	0%	1.3°C	24134m	3.6m/s
05:00	0%	1.3°C	24135m	3.9m/s
06:00	0%	1.5°C	24135m	4.2m/s
07:00	0%	1.7°C	24135m	4.3m/s
08:00	0%	1.8°C	24134m	4.4m/s
09:00	0%	1.6°C	22967m	4m/s
10:00	0%	1.8°C	20245m	4.1m/s
11:00	0%	2°C	11276m	4.3m/s
12:00	0%	2°C	3946m	4.3m/s
13:00	40%	2.1°C	2526m	4.4m/s
14:00	44%	2.1°C	2833m	4.2m/s
15:00	0%	2.2°C	3960m	4.2m/s
16:00	0%	1.7°C	3395m	3.9m/s
17:00	0%	1.6°C	4998m	3.7m/s
18:00	0%	1.3°C	4426m	3.4m/s
19:00	84%	1°C	1944m	3m/s
20:00	99%	0.9°C	1401m	2.7m/s
21:00	100%	0.7°C	1000m	2.4m/s
22:00	100%	0.5°C	1028m	2.2m/s
23:00	100%	0.5°C	998m	1.8m/s
Tue, Feb 10
24:00	100%	0.3°C	1016m	1.4m/s
01:00	100%	0.2°C	1503m	0.93m/s
02:00	97%	0.2°C	2566m	0.97m/s
03:00	97%	0.2°C	4489m	0.85m/s
04:00	86%	0.2°C	8726m	0.69m/s
05:00	86%	0.2°C	6840m	0.6m/s
06:00	75%	0.4°C	10092m	0.58m/s
07:00	64%	0.6°C	17473m	0.35m/s
08:00	60%	0.7°C	24135m	0.13m/s
09:00	60%	1°C	24134m	0.19m/s
10:00	0%	1.6°C	24135m	0.18m/s
11:00	0%	2.3°C	24135m	0.35m/s
12:00	0%	2.8°C	24135m	0.33m/s
13:00	0%	2.8°C	16275m	0.54m/s
14:00	100%	1.5°C	422m	0.41m/s
15:00	83%	1.1°C	2461m	0.39m/s
16:00	88%	0.7°C	4500m	0.37m/s
17:00	83%	0.3°C	6538m	0.34m/s
18:00	83%	0.3°C	6537m	0.39m/s
19:00	83%	0.4°C	6536m	0.44m/s
20:00	83%	0.4°C	6534m	0.48m/s
21:00	94%	0.3°C	4833m	0.62m/s
22:00	94%	0.4°C	3132m	0.76m/s
23:00	100%	0.4°C	1431m	0.9m/s
Wed, Feb 11
24:00	100%	0.4°C	1059m	0.98m/s
01:00	100%	0.5°C	688m	1.1m/s
02:00	57%	0.5°C	317m	1.1m/s
03:00	55%	0.8°C	374m	1.4m/s
04:00	53%	1.1°C	430m	1.6m/s
05:00	51%	1.4°C	487m	1.8m/s
06:00	51%	1.4°C	446m	1.9m/s
07:00	51%	1.5°C	406m	2m/s

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	Dew Point °C	Rainfall mm	Relative Humidity %	Snowfall cm	Temperature °C	Total Precipitation mm	Vapor Pressure Deficit kPa	Wind Gusts m/s
Sun, Feb 8 Sunrise 08:24 Sunset 16:49
09:00	-18°C	0mm	99%	0cm	-18°C	0mm	0kPa	0.11m/s
10:00	-14°C	0mm	94%	0cm	-14°C	0mm	0.01kPa	0.21m/s
11:00	-12°C	0mm	88%	0cm	-11°C	0mm	0.03kPa	0.61m/s
12:00	-11°C	0mm	84%	0cm	-9°C	0mm	0.05kPa	1.3m/s
13:00	-11°C	0mm	82%	0cm	-8°C	0mm	0.06kPa	2.2m/s
14:00	-10°C	0mm	81%	0cm	-7.5°C	0mm	0.06kPa	2.9m/s
15:00	-9.5°C	0mm	88%	0cm	-7.8°C	0mm	0.04kPa	3m/s
16:00	-11°C	0mm	95%	0cm	-10°C	0mm	0.01kPa	1.1m/s
17:00 ☾	-14°C	0mm	97%	0cm	-13°C	0mm	0.01kPa	1.3m/s
18:00 ☾	-15°C	0mm	95%	0cm	-14°C	0mm	0.01kPa	3.7m/s
19:00 ☾	-15°C	0mm	95%	0cm	-14°C	0mm	0.01kPa	4m/s
20:00 ☾	-15°C	0mm	95%	0cm	-15°C	0mm	0.01kPa	5.6m/s
21:00 ☾	-15°C	0mm	94%	0cm	-14°C	0mm	0.01kPa	8.1m/s
22:00 ☾	-15°C	0mm	97%	0cm	-14°C	0mm	0.01kPa	6.6m/s
23:00 ☾	-14°C	0mm	98%	0cm	-14°C	0mm	0kPa	8.7m/s
Mon, Feb 9 Sunrise 08:24 Sunset 16:49
24:00 ☾	-14°C	0mm	96%	0cm	-13°C	0mm	0.01kPa	11m/s
01:00 ☾	-13°C	0mm	94%	0cm	-12°C	0mm	0.01kPa	13m/s
02:00 ☾	-12°C	0mm	91%	0cm	-11°C	0mm	0.02kPa	14m/s
03:00 ☾	-12°C	0mm	90%	0cm	-10°C	0mm	0.03kPa	14m/s
04:00 ☾	-11°C	0mm	90%	0cm	-9.9°C	0mm	0.03kPa	15m/s
05:00 ☾	-11°C	0mm	90%	0cm	-9.3°C	0mm	0.03kPa	16m/s
06:00 ☾	-10°C	0mm	88%	0cm	-8.8°C	0mm	0.04kPa	16m/s
07:00 ☾	-10°C	0mm	87%	0cm	-8.4°C	0mm	0.04kPa	16m/s
08:00 ☾	-10°C	0mm	87%	0cm	-8.2°C	0mm	0.04kPa	15m/s
09:00	-9.9°C	0mm	89%	0cm	-8.3°C	0mm	0.04kPa	14m/s
10:00	-9.1°C	0mm	87%	0cm	-7.3°C	0mm	0.05kPa	14m/s
11:00	-8.5°C	0.01mm	86%	0cm	-6.5°C	0mm	0.05kPa	13m/s
12:00	-7.9°C	0.02mm	86%	0cm	-5.9°C	0mm	0.06kPa	12m/s
13:00	-7.8°C	0.03mm	85%	0.03cm	-5.7°C	0.06mm	0.06kPa	11m/s
14:00	-7.6°C	0.03mm	85%	0.03cm	-5.5°C	0.06mm	0.06kPa	11m/s
15:00	-7.5°C	0.03mm	85%	0.03cm	-5.3°C	0.06mm	0.06kPa	9.9m/s
16:00	-7.2°C	0.02mm	88%	0cm	-5.5°C	0.06mm	0.05kPa	9.8m/s
17:00 ☾	-7.4°C	0.01mm	89%	0cm	-5.8°C	0.06mm	0.04kPa	10m/s
18:00 ☾	-7.3°C	0.01mm	90%	0cm	-6°C	0.13mm	0.04kPa	9.6m/s
19:00 ☾	-7.4°C	0.02mm	92%	0.02cm	-6.4°C	0.13mm	0.03kPa	8.7m/s
20:00 ☾	-7.7°C	0.03mm	94%	0.03cm	-6.8°C	0.13mm	0.02kPa	7.6m/s
21:00 ☾	-8°C	0.03mm	95%	0.03cm	-7.3°C	0.06mm	0.02kPa	7.1m/s
22:00 ☾	-8.3°C	0.03mm	96%	0.03cm	-7.8°C	0.06mm	0.01kPa	6.6m/s
23:00 ☾	-8.7°C	0.03mm	97%	0.03cm	-8.2°C	0.13mm	0.01kPa	5m/s
Tue, Feb 10 Sunrise 08:21 Sunset 16:52
24:00 ☾	-9.2°C	0.03mm	97%	0.03cm	-8.9°C	0.13mm	0.01kPa	4.1m/s
01:00 ☾	-10°C	0.02mm	98%	0cm	-10°C	0.19mm	0kPa	0.91m/s
02:00 ☾	-10°C	0.01mm	99%	0cm	-10°C	0.19mm	0kPa	2.4m/s
03:00 ☾	-11°C	0.01mm	99%	0cm	-11°C	0mm	0kPa	1.7m/s
04:00 ☾	-12°C	0mm	99%	0cm	-12°C	0mm	0kPa	0.7m/s
05:00 ☾	-12°C	0mm	99%	0cm	-12°C	0mm	0kPa	0.6m/s
06:00 ☾	-12°C	0mm	97%	0cm	-12°C	0mm	0.01kPa	0.6m/s
07:00 ☾	-12°C	0mm	96%	0cm	-12°C	0mm	0.01kPa	0.4m/s
08:00 ☾	-12°C	0mm	94%	0cm	-12°C	0mm	0.01kPa	0.1m/s
09:00	-12°C	0mm	92%	0cm	-11°C	0mm	0.02kPa	0.41m/s
10:00	-12°C	0mm	88%	0cm	-10°C	0mm	0.03kPa	0.5m/s
11:00	-12°C	0mm	83%	0cm	-9.3°C	0mm	0.05kPa	1m/s
12:00	-11°C	0mm	80%	0cm	-8.3°C	0mm	0.07kPa	1.1m/s
13:00	-10°C	0.01mm	80%	0cm	-7.6°C	0mm	0.07kPa	1.2m/s
14:00	-8.9°C	0.11mm	89%	0.11cm	-7.4°C	0.06mm	0.04kPa	1.2m/s
15:00	-9.9°C	0.07mm	92%	0.07cm	-8.8°C	0.04mm	0.03kPa	0.91m/s
16:00	-11°C	0.04mm	95%	0.04cm	-10°C	0.02mm	0.02kPa	0.62m/s
17:00 ☾	-12°C	0mm	98%	0cm	-12°C	0mm	0.01kPa	0.32m/s
18:00 ☾	-12°C	0mm	98%	0cm	-12°C	0mm	0.01kPa	0.35m/s
19:00 ☾	-12°C	0mm	97%	0cm	-12°C	0mm	0.01kPa	0.38m/s
20:00 ☾	-12°C	0mm	97%	0cm	-11°C	0mm	0.01kPa	0.41m/s
21:00 ☾	-12°C	0.01mm	97%	0.01cm	-11°C	0mm	0.01kPa	0.57m/s
22:00 ☾	-12°C	0.03mm	97%	0.02cm	-11°C	0mm	0.01kPa	0.74m/s
23:00 ☾	-12°C	0.04mm	97%	0.04cm	-11°C	0mm	0.01kPa	0.91m/s
Wed, Feb 11 Sunrise 08:18 Sunset 16:55
24:00 ☾	-11°C	0.06mm	96%	0.06cm	-11°C	0.08mm	0.01kPa	1.7m/s
01:00 ☾	-11°C	0.09mm	96%	0.08cm	-11°C	0.17mm	0.01kPa	2.5m/s
02:00 ☾	-11°C	0.11mm	96%	0.11cm	-11°C	0.25mm	0.01kPa	3.3m/s
03:00 ☾	-11°C	0.11mm	94%	0.1cm	-10°C	0.27mm	0.02kPa	3.3m/s
04:00 ☾	-11°C	0.1mm	92%	0.1cm	-9.5°C	0.29mm	0.02kPa	3.2m/s
05:00 ☾	-10°C	0.1mm	90%	0.1cm	-8.8°C	0.31mm	0.03kPa	3.2m/s
06:00 ☾	-9.9°C	0.11mm	90%	0.11cm	-8.5°C	0.44mm	0.03kPa	3.2m/s
07:00 ☾	-9.7°C	0.12mm	89%	0.12cm	-8.2°C	0.56mm	0.03kPa	3.2m/s
08:00 ☾	-9.4°C	0.13mm	89%	0.13cm	-7.9°C	0.69mm	0.04kPa	3.1m/s

How to read: these inputs help produce the derived score; they are not requirements by themselves.

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