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Rule Fog Hunter

Fog Hunter Forecast for Rovaniemi, Finnish Lapland

Rovaniemi, Lapland, Finland

The Kemijoki and Ounasjoki rivers meet at Rovaniemi, where bridges and winter ice provide distinctly urban Arctic foregrounds. Ounasvaara rises immediately east of the centre for views across the river junction, forest, and city lights.

Currently

Real-time conditions
Fog Probability
34%
Dewpoint Spread0.4°C
Visibility18235 (Clear)
Relative Humidity98%
Wind Speed3.2m/s (calm conditions)

Upcoming Opportunities

When all conditions match, PhotoWeather marks an opportunity window.

Times shown in Europe/Helsinki
fog weather icon
Next opportunity
Fog Potential at Sunrise
Rovaniemi
Tue, Jul 28 · 04:00–06:00 · 2h window
Low confidence
23%
🌫️Fog Probability75.8%
Dewpoint Spread: 0.1°C
Visibility: 23460 (Clear)
Relative Humidity: 99%
Wind Speed: 1.4m/s (calm conditions)

How this forecast is evaluated

See which weather signals PhotoWeather uses to identify Fog Hunter conditions across Finnish Lapland. The requirements and hourly values below show how those signals apply at Rovaniemi.

Explore Fog Hunter conditions across Finnish Lapland →

Recorded match history

Completed PhotoWeather forecast matches recorded for this exact rule at Rovaniemi during the last 365 days.

Last 30 days
0
recorded matching windows
Last 90 days
2
recorded matching windows · 43% average confidence
Last 365 days
2
recorded matching windows · 43% average confidence

Only 2 completed matches are recorded in the last 365 days—insufficient history to identify a reliable typical start time or month.

These figures use completed PhotoWeather MatchEvent records from the previous 365 days only. They describe recorded forecast matches, not observations, climatological probability, or a guarantee of future conditions.

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95-hour requirements breakdown

When available, the detailed table below covers only the stated 95-hour horizon (typically 72–168 hours, depending on available hourly data). Opportunity records above span the next 14 days, so this table does not explain that entire 14-day period.

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%
Sat, Jul 25
04:000%
05:0026%
06:000%
07:000%
08:000%
09:000%
10:0026%
11:000%
12:000%
13:000%
14:000%
15:000%
16:000%
17:000%
18:000%
19:000%
20:000%
21:000%
22:0048%
23:0026%
Sun, Jul 26
24:0034%
01:0034%
02:0034%
03:0034%
04:0062%
05:0062%
06:0043%
07:000%
08:000%
09:0015%
10:000%
11:0015%
12:000%
13:000%
14:000%
15:000%
16:0026%
17:0026%
18:0015%
19:0016%
20:0018%
21:0018%
22:0018%
23:0018%
Mon, Jul 27
24:0018%
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%
19:0027%
20:000%
21:000%
22:0069%
23:0062%
Tue, Jul 28
24:0034%
01:0041%
02:0042%
03:0042%
04:0076%
05:0076%
06:0073%
07:0064%
08:0048%
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%
Wed, Jul 29
24:000%
01:000%
02:000%
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
Sun, Jul 26 Sunrise 03:30 Sunset 23:12
05:00
0% 13°C 0.24mm 98% 0cm 5° 13°C 0.06mm 0.04kPa 18235m 8.6m/s 3.2m/s
06:00
0% 13°C 0.02mm 98% 0cm 9.9° 13°C 0.31mm 0.03kPa 24135m 8.6m/s 3.2m/s
07:00
0% 13°C 0mm 96% 0cm 16° 14°C 0.38mm 0.06kPa 23464m 8.6m/s 3.7m/s
08:00
0% 13°C 0mm 95% 0cm 21° 14°C 0.44mm 0.08kPa 22764m 8.8m/s 3.9m/s
09:00
0% 13°C 0mm 94% 0cm 27° 14°C 0.5mm 0.1kPa 24134m 9m/s 4.2m/s
10:00
0% 13°C 0mm 94% 0cm 33° 14°C 0.06mm 0.09kPa 23610m 9.6m/s 4.3m/s
11:00
0% 13°C 0mm 95% 0cm 38° 14°C 0.13mm 0.08kPa 24134m 9.8m/s 4.3m/s
12:00
0% 13°C 0.96mm 96% 0cm 41° 14°C 0.5mm 0.06kPa 10659m 10m/s 4.1m/s
13:00
0% 13°C 0.14mm 96% 0cm 43° 13°C 0.94mm 0.05kPa 24134m 9.8m/s 4.1m/s
14:00
0% 13°C 0mm 96% 0cm 43° 14°C 1.1mm 0.06kPa 24134m 10m/s 4.5m/s
15:00
0% 13°C 0.04mm 93% 0cm 40° 14°C 1.2mm 0.11kPa 23453m 10m/s 4.8m/s
16:00
0% 13°C 0.01mm 94% 0cm 37° 14°C 0.06mm 0.1kPa 24134m 11m/s 4.5m/s
17:00
0% 14°C 1.3mm 94% 0cm 32° 14°C 0.63mm 0.09kPa 9275m 9.7m/s 3.3m/s
18:00
0% 13°C 0.02mm 95% 0cm 26° 14°C 1.1mm 0.09kPa 23750m 10m/s 3.8m/s
19:00
0% 13°C 0.2mm 96% 0cm 20° 14°C 1.3mm 0.07kPa 24135m 9.9m/s 3.9m/s
20:00
0% 13°C 0.05mm 97% 0cm 14° 14°C 1.4mm 0.05kPa 24135m 11m/s 4.4m/s
21:00
0% 13°C 0.06mm 97% 0cm 8.7° 14°C 1.4mm 0.05kPa 24134m 11m/s 4.4m/s
22:00
0% 13°C 0.01mm 97% 0cm 4° 14°C 0.06mm 0.04kPa 24003m 11m/s 4.2m/s
23:00
0% 13°C 0mm 97% 0cm 0.39° 14°C 0.06mm 0.05kPa 24135m 10m/s 4m/s
Mon, Jul 27 Sunrise 03:30 Sunset 23:12
24:00 ☾
0% 13°C 0mm 96% 0cm -2.7° 14°C 0.13mm 0.06kPa 20115m 10m/s 3.9m/s
01:00 ☾
0% 14°C 0.01mm 96% 0cm -4° 14°C 0.5mm 0.06kPa 23458m 10m/s 4m/s
02:00 ☾
0% 14°C 0mm 96% 0cm -3.9° 14°C 0.75mm 0.07kPa 22577m 10m/s 4.3m/s
03:00 ☾
0% 13°C 0mm 94% 0cm -2.2° 14°C 0.94mm 0.1kPa 24135m 9.8m/s 4.2m/s
04:00
1% 13°C 0mm 97% 0cm 0.98° 13°C 0.13mm 0.05kPa 24135m 8.8m/s 3.1m/s
05:00
2% 13°C 0mm 97% 0cm 4.8° 14°C 0.31mm 0.04kPa 15816m 8m/s 2.9m/s
06:00
3% 13°C 0mm 94% 0cm 9.7° 14°C 0.44mm 0.09kPa 24134m 7.5m/s 2.8m/s
07:00
2% 13°C 0mm 94% 0cm 15° 14°C 0.5mm 0.11kPa 24135m 7.4m/s 3.1m/s
08:00
2% 14°C 0mm 91% 0cm 21° 15°C 0.63mm 0.15kPa 24134m 7.1m/s 3.3m/s
09:00
1% 14°C 0mm 86% 0cm 27° 16°C 0.75mm 0.24kPa 22846m 6.3m/s 3.5m/s
10:00
4% 13°C 0mm 81% 0cm 33° 16°C 0.25mm 0.35kPa 24134m 6m/s 3.8m/s
11:00
7% 13°C 0mm 75% 0cm 37° 17°C 0.31mm 0.49kPa 24135m 5.5m/s 3.7m/s
12:00
10% 11°C 0mm 61% 0cm 41° 19°C 0.31mm 0.83kPa 24135m 5.8m/s 3.8m/s
13:00
8% 9.8°C 0mm 52% 0cm 43° 20°C 0.38mm 1.1kPa 24134m 5.7m/s 3.6m/s
14:00
6% 9.2°C 0mm 48% 0cm 42° 21°C 0.38mm 1.3kPa 24134m 5.5m/s 3.3m/s
15:00
4% 10°C 0.01mm 55% 0cm 40° 19°C 0.38mm 1kPa 24135m 4.4m/s 3m/s
16:00
3% 12°C 0.59mm 79% 0cm 36° 16°C 0.19mm 0.38kPa 15691m 4.8m/s 2.1m/s
17:00
3% 13°C 1.7mm 94% 0cm 31° 14°C 1.3mm 0.09kPa 8083m 2.1m/s 1.2m/s
18:00
2% 13°C 2.3mm 97% 0cm 26° 14°C 2.8mm 0.05kPa 6882m 1.4m/s 1.1m/s
19:00
1% 13°C 1.6mm 99% 0cm 20° 13°C 5.1mm 0.02kPa 8223m 3.1m/s 1.4m/s
20:00
1% 14°C 0.27mm 99% 0cm 14° 14°C 5.9mm 0.01kPa 18777m 5.1m/s 2m/s
21:00
0% 15°C 2.3mm 99% 0cm 8.5° 15°C 7.3mm 0.02kPa 5528m 6.6m/s 1.9m/s
22:00
0% 15°C 2mm 99% 0cm 3.8° 15°C 2.9mm 0.01kPa 2766m 7.1m/s 2m/s
23:00
0% 15°C 1.4mm 99% 0cm 0.21° 15°C 4.6mm 0.02kPa 1709m 8m/s 2.9m/s
Tue, Jul 28 Sunrise 03:35 Sunset 23:08
24:00 ☾
0% 15°C 0.38mm 98% 0cm -2.9° 15°C 5.9mm 0.03kPa 22776m 7.4m/s 2.7m/s
01:00 ☾
0% 15°C 0.08mm 99% 0cm -4.3° 15°C 6.1mm 0.02kPa 22603m 5.9m/s 1.9m/s
02:00 ☾
0% 14°C 0mm 99% 0cm -4.1° 15°C 6.2mm 0.02kPa 24134m 6.6m/s 1.9m/s
03:00 ☾
0% 14°C 0mm 99% 0cm -2.5° 14°C 6.3mm 0.02kPa 24135m 5.7m/s 1.8m/s
04:00
0% 14°C 0.36mm 99% 0cm 0.79° 14°C 0.06mm 0.01kPa 20705m 3.2m/s 1.6m/s
05:00
1% 14°C 0.01mm 99% 0cm 4.6° 14°C 0.25mm 0.01kPa 24134m 4.2m/s 1.6m/s
06:00
1% 14°C 0mm 99% 0cm 9.5° 14°C 0.31mm 0.02kPa 24135m 4.1m/s 1.4m/s
07:00
1% 14°C 0mm 98% 0cm 15° 15°C 0.31mm 0.03kPa 24134m 4.4m/s 1.6m/s
08:00
1% 15°C 0.24mm 97% 0cm 21° 15°C 0.44mm 0.04kPa 23236m 5.4m/s 2.1m/s
09:00
1% 15°C 0.07mm 98% 0cm 27° 15°C 0.56mm 0.04kPa 24135m 5.3m/s 1.8m/s
10:00
2% 15°C 0.12mm 97% 0cm 32° 15°C 0.19mm 0.05kPa 24134m 5.3m/s 1.8m/s
11:00
3% 15°C 0mm 97% 0cm 37° 15°C 0.19mm 0.05kPa 24134m 5.6m/s 2.1m/s
12:00
4% 15°C 0mm 93% 0cm 41° 16°C 0.25mm 0.14kPa 24134m 4.5m/s 1.9m/s
13:00
3% 16°C 0mm 80% 0cm 42° 19°C 0.88mm 0.44kPa 6199m 2.9m/s 1.7m/s
14:00
1% 16°C 0mm 80% 0cm 42° 20°C 1.9mm 0.47kPa 8997m 2.5m/s 1.2m/s
15:00
0% 15°C 0mm 66% 0cm 40° 22°C 2.3mm 0.89kPa 24135m 1.7m/s 0.2m/s
16:00
0% 15°C 0mm 75% 0cm 36° 20°C 1.5mm 0.57kPa 24135m 1.7m/s 0.63m/s
17:00
0% 15°C 0mm 84% 0cm 31° 17°C 0.75mm 0.32kPa 24135m 1.7m/s 1.1m/s
18:00
0% 14°C 0mm 93% 0cm 26° 15°C 0mm 0.11kPa 24135m 1.7m/s 1.5m/s
19:00
0% 14°C 0mm 94% 0cm 20° 15°C 0mm 0.1kPa 24135m 1.6m/s 1.4m/s
20:00
0% 14°C 0mm 94% 0cm 14° 15°C 0mm 0.09kPa 24135m 1.4m/s 1.4m/s
21:00
0% 13°C 0mm 95% 0cm 8.3° 14°C 0mm 0.09kPa 24135m 1.2m/s 1.3m/s
22:00
0% 14°C 0mm 94% 0cm 3.6° 14°C 0mm 0.1kPa 24135m 1.2m/s 1.2m/s
23:00
0% 14°C 0mm 94% 0cm 0.02° 15°C 0mm 0.11kPa 24135m 1.2m/s 1m/s
Wed, Jul 29 Sunrise 03:39 Sunset 23:04
24:00 ☾
0% 14°C 0mm 93% 0cm -3.2° 15°C 0mm 0.12kPa 24135m 1.2m/s 0.89m/s
01:00 ☾
0% 14°C 0mm 87% 0cm -4.5° 16°C 0mm 0.24kPa 24135m 1.2m/s 0.82m/s
02:00 ☾
0% 14°C 0mm 81% 0cm -4.4° 18°C 0mm 0.38kPa 24135m 1.1m/s 0.75m/s
03:00 ☾
0% 15°C 0mm 76% 0cm -2.7° 19°C 0mm 0.53kPa 24135m 1m/s 0.67m/s
04:00
0% 14°C 0mm 69% 0cm 0.59° 20°C 0.02mm 0.75kPa 24135m 1m/s 0.77m/s
How to read: these inputs help produce the derived score; they are not requirements by themselves.

How this forecast is made

Opportunities are threshold-based signals: PhotoWeather checks whether forecast conditions match the rules for a photography scenario. They are planning guidance, not guarantees. Forecasts can change as new model runs arrive, and confidence generally decreases farther into the forecast horizon, so recheck conditions before travelling.

The weather forecast foundation comes through Open-Meteo , which aggregates models from weather agencies. PhotoWeather applies condition-specific thresholds and derived calculations; not every condition uses every model or data input.

How opportunities work → Weather data sources →
Forecast generated

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