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 2 upcoming opportunity windows in the next 10 days.

More Fog Hunter in Southern Finland

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Rule Fog Hunter

Nuuksio - Fog Hunter - Southern Finland

Uusimaa, Finland

Thick, moody fog for atmospheric forest and landscape shots

Currently

Real-time conditions

Fog Probability

60%

Dewpoint Spread0.8°C

Visibility21656 (Clear)

Relative Humidity94%

Wind Speed2.8m/s (calm conditions)

Upcoming Opportunities

When all conditions match, PhotoWeather marks an opportunity window.

Times shown in Europe/Helsinki

Next opportunity

Dense Fog (lingering) at Sunset

Nuuksio

Mon, Feb 23 · 17:00–18:00 · 1h window

Medium confidence

48%

🌫️Fog Probability97.2%

Dewpoint Spread: 0.1°C

Visibility: 2956 (Mist/Haze)

Relative Humidity: 100%

Wind Speed: 1.3m/s (calm conditions)

Dense Fog (lingering)

Nuuksio

Mon, Feb 23 · 21:00–22:00

🌫️Fog Probability:94.4%

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

5matching hours in the next 95 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
Tue, Feb 17
21:00	86%	0°C	6547m	0.99m/s
22:00	86%	0°C	6437m	1.3m/s
23:00	86%	0.1°C	6547m	1.4m/s
Wed, Feb 18
24:00	86%	0°C	6547m	1.5m/s
01:00	86%	0°C	6588m	1.6m/s
02:00	86%	0°C	6510m	1.7m/s
03:00	100%	0°C	214m	1.4m/s
04:00	100%	0°C	229m	1.6m/s
05:00	100%	0°C	260m	1.6m/s
06:00	100%	0°C	350m	1.7m/s
07:00	100%	0°C	706m	1.9m/s
08:00	97%	0°C	3577m	2m/s
09:00	86%	0°C	6388m	2.2m/s
10:00	0%	1.1°C	21856m	2.8m/s
11:00	0%	1.9°C	23983m	3.1m/s
12:00	0%	2.4°C	24134m	3.1m/s
13:00	0%	2.7°C	24134m	3.1m/s
14:00	0%	2.7°C	24134m	3.4m/s
15:00	0%	2.3°C	24135m	3.5m/s
16:00	0%	1.5°C	24135m	3.5m/s
17:00	51%	0.9°C	24045m	3.5m/s
18:00	51%	0.7°C	15420m	3.4m/s
19:00	51%	0.7°C	16651m	3.3m/s
20:00	51%	0.7°C	24135m	3.1m/s
21:00	60%	0.8°C	21656m	2.8m/s
22:00	60%	0.7°C	19781m	2.5m/s
23:00	88%	0.7°C	2946m	2.5m/s
Thu, Feb 19
24:00	100%	0.6°C	597m	2.4m/s
01:00	100%	0.6°C	644m	2.3m/s
02:00	57%	0.6°C	471m	2.1m/s
03:00	100%	0.6°C	451m	2.1m/s
04:00	100%	0.6°C	442m	2.1m/s
05:00	57%	0.6°C	344m	2m/s
06:00	57%	0.6°C	308m	1.9m/s
07:00	57%	0.6°C	269m	2m/s
08:00	55%	0.7°C	349m	2.1m/s
09:00	100%	0.8°C	241m	2.4m/s
10:00	53%	1.1°C	226m	2.7m/s
11:00	45%	1.6°C	432m	2.8m/s
12:00	45%	1.9°C	835m	2.7m/s
13:00	42%	2°C	851m	2.6m/s
14:00	29%	2.4°C	2367m	2.4m/s
15:00	100%	1.9°C	821m	2.3m/s
16:00	100%	1.4°C	608m	2.2m/s
17:00	55%	0.7°C	483m	2m/s
18:00	57%	0.6°C	632m	2m/s
19:00	49%	0.7°C	1152m	2.3m/s
20:00	44%	0.9°C	3877m	2.7m/s
21:00	0%	1.1°C	21500m	2.8m/s
22:00	0%	1.1°C	24134m	2.7m/s
23:00	0%	1.1°C	24134m	2.7m/s
Fri, Feb 20
24:00	0%	1.2°C	24135m	3m/s
01:00	51%	0.9°C	24134m	3.3m/s
02:00	51%	0.9°C	24135m	3.2m/s
03:00	51%	0.9°C	24135m	3.3m/s
04:00	0%	1.1°C	24134m	3.3m/s
05:00	0%	1.2°C	24134m	3.4m/s
06:00	0%	1.3°C	24134m	3.4m/s
07:00	0%	1.3°C	24134m	3.5m/s
08:00	0%	1.3°C	24134m	3.8m/s
09:00	0%	1.7°C	24134m	3.7m/s
10:00	0%	2.3°C	24134m	3.7m/s
11:00	0%	3°C	24135m	4.1m/s
12:00	0%	3.8°C	24135m	4.2m/s
13:00	0%	4.4°C	24134m	4.1m/s
14:00	0%	4.5°C	24134m	3.9m/s
15:00	0%	4°C	24134m	3.4m/s
16:00	0%	3.5°C	24134m	3.3m/s
17:00	0%	1.8°C	24135m	1.9m/s
18:00	64%	0.5°C	24135m	1.6m/s
19:00	64%	0.6°C	21642m	1.8m/s
20:00	54%	0.5°C	22052m	2.1m/s
21:00	54%	0.5°C	20834m	1.9m/s
22:00	67%	0.4°C	21524m	1.6m/s
23:00	67%	0.5°C	21604m	1.5m/s
Sat, Feb 21
24:00	64%	0.5°C	23985m	1.5m/s
01:00	51%	0.8°C	24135m	1.9m/s
02:00	51%	0.8°C	24135m	2.7m/s
03:00	51%	0.9°C	16572m	3.3m/s
04:00	0%	1°C	9010m	4m/s
05:00	56%	1.1°C	1447m	4.6m/s
06:00	56%	1.1°C	1118m	4.6m/s
07:00	63%	1.1°C	790m	4.6m/s
08:00	33%	1°C	461m	4.6m/s
09:00	33%	0.9°C	357m	4.3m/s
10:00	33%	0.7°C	253m	4.1m/s
11:00	43%	0.6°C	150m	3.9m/s
12:00	43%	0.6°C	146m	3.9m/s
13:00	0%	0.5°C	143m	3.9m/s
14:00	0%	0.6°C	140m	4m/s
15:00	0%	0.6°C	139m	4.1m/s
16:00	0%	0.6°C	138m	4.1m/s
17:00	0%	0.6°C	138m	4.2m/s
18:00	0%	0.5°C	139m	4.1m/s
19:00	0%	0.5°C	140m	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 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
Wed, Feb 18 Sunrise 07:53 Sunset 17:19
21:00 ☾	-12°C	0mm	94%	0cm	-11°C	0mm	0.02kPa	7.7m/s
22:00 ☾	-12°C	0.01mm	95%	0cm	-11°C	0mm	0.01kPa	6.8m/s
23:00 ☾	-12°C	0.05mm	95%	0cm	-11°C	0mm	0.01kPa	6.6m/s
Thu, Feb 19 Sunrise 07:53 Sunset 17:19
24:00 ☾	-11°C	0.07mm	95%	0.07cm	-11°C	0.13mm	0.01kPa	6.5m/s
01:00 ☾	-11°C	0.06mm	95%	0.06cm	-10°C	0.13mm	0.01kPa	6.3m/s
02:00 ☾	-11°C	0.08mm	95%	0.08cm	-10°C	0.25mm	0.01kPa	5.9m/s
03:00 ☾	-10°C	0.08mm	96%	0.08cm	-9.9°C	0.06mm	0.01kPa	5.9m/s
04:00 ☾	-10°C	0.08mm	96%	0.08cm	-9.7°C	0.19mm	0.01kPa	5.7m/s
05:00 ☾	-10°C	0.1mm	96%	0.1cm	-9.7°C	0.25mm	0.01kPa	5.3m/s
06:00 ☾	-10°C	0.11mm	95%	0.11cm	-9.6°C	0.38mm	0.01kPa	5.1m/s
07:00 ☾	-10°C	0.13mm	95%	0.13cm	-9.6°C	0.5mm	0.01kPa	5.1m/s
08:00	-10°C	0.1mm	95%	0.1cm	-9.6°C	0.63mm	0.02kPa	5.2m/s
09:00	-10°C	0.15mm	94%	0.15cm	-9.4°C	0.13mm	0.02kPa	5.6m/s
10:00	-10°C	0.18mm	91%	0.18cm	-9°C	0.31mm	0.03kPa	5.5m/s
11:00	-10°C	0.12mm	88%	0.12cm	-8.6°C	0.44mm	0.04kPa	4.8m/s
12:00	-10°C	0.07mm	86%	0.07cm	-8.3°C	0.56mm	0.05kPa	4.1m/s
13:00	-10°C	0.07mm	85%	0.08cm	-8°C	0.63mm	0.05kPa	3.8m/s
14:00	-10°C	0.03mm	83%	0.04cm	-7.7°C	0.69mm	0.06kPa	3.6m/s
15:00	-9.7°C	0.06mm	86%	0.07cm	-7.8°C	0.06mm	0.05kPa	3.8m/s
16:00	-9.4°C	0.07mm	90%	0.08cm	-8°C	0.13mm	0.03kPa	4.4m/s
17:00	-9.3°C	0.08mm	94%	0.08cm	-8.6°C	0.25mm	0.02kPa	5m/s
18:00 ☾	-9.7°C	0.06mm	96%	0.06cm	-9.1°C	0.31mm	0.01kPa	5.9m/s
19:00 ☾	-9.9°C	0.03mm	95%	0.03cm	-9.2°C	0.31mm	0.02kPa	6.8m/s
20:00 ☾	-10°C	0.01mm	93%	0cm	-9.1°C	0.38mm	0.02kPa	7.2m/s
21:00 ☾	-11°C	0mm	92%	0cm	-9.5°C	0mm	0.02kPa	7.5m/s
22:00 ☾	-11°C	0mm	92%	0cm	-9.9°C	0mm	0.02kPa	7.8m/s
23:00 ☾	-11°C	0mm	92%	0cm	-10°C	0mm	0.02kPa	7.6m/s
Fri, Feb 20 Sunrise 07:50 Sunset 17:21
24:00 ☾	-11°C	0mm	91%	0cm	-10°C	0mm	0.03kPa	8.3m/s
01:00 ☾	-12°C	0mm	93%	0cm	-11°C	0mm	0.02kPa	9.3m/s
02:00 ☾	-13°C	0mm	93%	0cm	-12°C	0mm	0.02kPa	9.7m/s
03:00 ☾	-13°C	0mm	93%	0cm	-12°C	0mm	0.02kPa	11m/s
04:00 ☾	-14°C	0mm	91%	0cm	-13°C	0mm	0.02kPa	11m/s
05:00 ☾	-14°C	0mm	91%	0cm	-13°C	0mm	0.02kPa	11m/s
06:00 ☾	-15°C	0mm	90%	0cm	-14°C	0mm	0.02kPa	11m/s
07:00 ☾	-15°C	0mm	90%	0cm	-14°C	0mm	0.02kPa	11m/s
08:00	-15°C	0mm	90%	0cm	-14°C	0mm	0.02kPa	12m/s
09:00	-15°C	0mm	87%	0cm	-13°C	0mm	0.03kPa	12m/s
10:00	-14°C	0mm	83%	0cm	-11°C	0mm	0.04kPa	12m/s
11:00	-12°C	0mm	78%	0cm	-9.5°C	0mm	0.06kPa	11m/s
12:00	-12°C	0mm	74%	0cm	-7.9°C	0mm	0.09kPa	9.9m/s
13:00	-11°C	0mm	71%	0cm	-6.7°C	0mm	0.11kPa	9m/s
14:00	-10°C	0mm	71%	0cm	-5.9°C	0mm	0.12kPa	8.6m/s
15:00	-9.7°C	0mm	73%	0cm	-5.7°C	0mm	0.11kPa	9.2m/s
16:00	-9.5°C	0mm	76%	0cm	-6°C	0mm	0.09kPa	9m/s
17:00	-9.6°C	0mm	87%	0cm	-7.8°C	0mm	0.04kPa	3.1m/s
18:00 ☾	-11°C	0mm	96%	0cm	-11°C	0mm	0.01kPa	1.5m/s
19:00 ☾	-11°C	0mm	96%	0cm	-10°C	0mm	0.01kPa	4.3m/s
20:00 ☾	-10°C	0mm	96%	0cm	-9.9°C	0mm	0.01kPa	7.8m/s
21:00 ☾	-10°C	0mm	96%	0cm	-10°C	0mm	0.01kPa	7.4m/s
22:00 ☾	-11°C	0mm	97%	0cm	-11°C	0mm	0.01kPa	4.9m/s
23:00 ☾	-11°C	0mm	96%	0cm	-11°C	0mm	0.01kPa	3.5m/s
Sat, Feb 21 Sunrise 07:47 Sunset 17:24
24:00 ☾	-11°C	0mm	96%	0cm	-10°C	0mm	0.01kPa	4.1m/s
01:00 ☾	-8.7°C	0mm	94%	0cm	-7.9°C	0mm	0.02kPa	11m/s
02:00 ☾	-6.6°C	0mm	94%	0cm	-5.8°C	0mm	0.02kPa	12m/s
03:00 ☾	-5.8°C	0.01mm	93%	0.01cm	-4.9°C	0.02mm	0.03kPa	12m/s
04:00 ☾	-5.1°C	0.03mm	93%	0.03cm	-4.1°C	0.04mm	0.03kPa	12m/s
05:00 ☾	-4.3°C	0.04mm	92%	0.04cm	-3.2°C	0.06mm	0.04kPa	11m/s
06:00 ☾	-4.2°C	0.07mm	92%	0.07cm	-3.1°C	0.13mm	0.04kPa	11m/s
07:00 ☾	-4°C	0.1mm	92%	0.1cm	-2.9°C	0.19mm	0.04kPa	11m/s
08:00	-3.8°C	0.13mm	93%	0.13cm	-2.8°C	0.25mm	0.04kPa	12m/s
09:00	-4.1°C	0.18mm	94%	0.18cm	-3.2°C	0.35mm	0.03kPa	11m/s
10:00	-4.4°C	0.23mm	95%	0.23cm	-3.7°C	0.46mm	0.03kPa	11m/s
11:00	-4.7°C	0.28mm	96%	0.28cm	-4.1°C	0.56mm	0.02kPa	10m/s
12:00	-4.7°C	0.35mm	96%	0.35cm	-4.1°C	0.96mm	0.02kPa	11m/s
13:00	-4.6°C	0.41mm	96%	0.41cm	-4.1°C	1.4mm	0.02kPa	11m/s
14:00	-4.6°C	0.48mm	96%	0.48cm	-4°C	1.8mm	0.02kPa	12m/s
15:00	-4.5°C	0.52mm	96%	0.52cm	-3.9°C	1.7mm	0.02kPa	12m/s
16:00	-4.4°C	0.57mm	96%	0.56cm	-3.8°C	1.6mm	0.02kPa	12m/s
17:00	-4.3°C	0.61mm	96%	0.61cm	-3.7°C	1.6mm	0.02kPa	12m/s
18:00 ☾	-4°C	0.54mm	96%	0.54cm	-3.5°C	2.1mm	0.02kPa	12m/s
19:00 ☾	-3.7°C	0.48mm	96%	0.48cm	-3.2°C	2.6mm	0.02kPa	12m/s
20:00 ☾	-3.4°C	0.41mm	97%	0.41cm	-2.9°C	3.1mm	0.02kPa	12m/s

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

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