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Rule Fog Hunter

Fog Hunter Forecast for Chamonix, Alps

Chamonix, Auvergne-Rhône-Alpes, France

Chamonix lies below the Mont Blanc massif, with glaciers, sharp aiguilles and valley architecture supplying dramatic contrasts of rock, ice and settlement.

Currently

Real-time conditions
Fog Probability
0%
Dewpoint Spread0.6°C
Visibility8327 (Moderate)
Relative Humidity96%
Wind Speed2.1m/s (calm conditions)

Upcoming Opportunities

When all conditions match, PhotoWeather marks an opportunity window.

Times shown in Europe/Zurich

No opportunities in the next 14 days

See which requirements block the most forecast hours below.

Most common blockers (95-hour forecast)

  • Fog Probability100% of hours

How this forecast is evaluated

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

Explore Fog Hunter conditions across Alps →

Recorded match history

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

Last 30 days
0
recorded matching windows
Last 90 days
11
recorded matching windows · 83% average confidence
Last 365 days
11
recorded matching windows · 83% average confidence
Most frequent recorded start hour

03:00 local time, shared by 4 of 11 matches recorded in the last 365 days.

Most represented month

June, with 7 of 11 matches recorded in the last 365 days.

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
0matching hours in the next 95 hours
AND logic: all conditions required
Meets requirement
Misses requirement
Time
Europe/Zurich
Fog Probability
≥ 75.0%
Sat, Jul 25
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%
Sun, Jul 26
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%
Mon, Jul 27
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, Jul 28
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%
Wed, Jul 29
24:000%
01:000%
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/Zurich
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 06:08 Sunset 21:09
04:00 ☾
0% 10°C 2.1mm 96% 0cm -17° 11°C 2.7mm 0.05kPa 8327m 2.5m/s 2.1m/s
05:00 ☾
0% 9.6°C 3.1mm 95% 0cm -10° 10°C 5mm 0.06kPa 7095m 1.2m/s 1m/s
06:00 ☾
0% 9.2°C 4.4mm 93% 0cm -1.9° 10°C 8.7mm 0.09kPa 4861m 2m/s 1.7m/s
07:00
0% 8.7°C 0.56mm 90% 0cm 7.4° 10°C 11mm 0.12kPa 19856m 2.3m/s 1.9m/s
08:00
0% 8.1°C 0.02mm 81% 0cm 17° 11°C 11mm 0.25kPa 24134m 1.3m/s 1.1m/s
09:00
0% 8.2°C 0mm 76% 0cm 28° 12°C 0mm 0.33kPa 23207m 1m/s 0.86m/s
10:00
0% 8.7°C 0.07mm 80% 0cm 38° 12°C 0.13mm 0.29kPa 23518m 1.5m/s 1.7m/s
11:00
0% 9.1°C 0.01mm 86% 0cm 48° 11°C 0.31mm 0.19kPa 24135m 1.1m/s 1.5m/s
12:00
0% 9.5°C 0.01mm 87% 0cm 57° 12°C 0.44mm 0.18kPa 23402m 1.5m/s 1.8m/s
13:00
0% 9.5°C 0.04mm 88% 0cm 62° 11°C 0.5mm 0.16kPa 24134m 1.4m/s 1.6m/s
14:00
0% 9.5°C 0.01mm 90% 0cm 63° 11°C 0.56mm 0.14kPa 24134m 0.91m/s 1.1m/s
15:00
0% 9.5°C 0mm 90% 0cm 59° 11°C 0.06mm 0.14kPa 24134m 0.62m/s 0.66m/s
16:00
0% 9.4°C 0mm 87% 0cm 51° 11°C 0.06mm 0.18kPa 24135m 0.33m/s 0.41m/s
17:00
0% 9.4°C 0mm 80% 0cm 41° 13°C 0.13mm 0.29kPa 24135m 0.61m/s 0.66m/s
18:00
0% 9.7°C 0mm 76% 0cm 31° 14°C 0.19mm 0.38kPa 22406m 1.8m/s 2m/s
19:00
0% 9.8°C 0mm 78% 0cm 20° 13°C 0.44mm 0.33kPa 24051m 1.8m/s 1.9m/s
20:00
0% 10°C 0mm 84% 0cm 10° 13°C 0.63mm 0.24kPa 20141m 1.8m/s 1.7m/s
21:00
0% 9.2°C 0mm 86% 0cm 1° 11°C 0.25mm 0.19kPa 24116m 1.5m/s 1.1m/s
22:00 ☾
1% 7.8°C 0mm 89% 0cm -8.1° 9.6°C 0.31mm 0.14kPa 24134m 0.7m/s 0.53m/s
23:00 ☾
1% 7.1°C 0mm 87% 0cm -15° 9.2°C 0.31mm 0.15kPa 24135m 1m/s 1.1m/s
Mon, Jul 27 Sunrise 06:08 Sunset 21:09
24:00 ☾
1% 6.2°C 0mm 84% 0cm -21° 8.8°C 0.31mm 0.18kPa 24134m 1.3m/s 1.4m/s
01:00 ☾
2% 5.7°C 0mm 81% 0cm -24° 8.8°C 0.31mm 0.22kPa 24135m 1.7m/s 1.7m/s
02:00 ☾
2% 5.2°C 0mm 80% 0cm -25° 8.5°C 0.31mm 0.23kPa 24134m 1.5m/s 1.6m/s
03:00 ☾
10% 4.8°C 0mm 80% 0cm -22° 8.1°C 0mm 0.22kPa 24135m 1.3m/s 1.3m/s
04:00 ☾
17% 4.7°C 0mm 81% 0cm -17° 7.8°C 0mm 0.2kPa 24135m 1.1m/s 1.1m/s
05:00 ☾
25% 4.8°C 0mm 83% 0cm -11° 7.6°C 0mm 0.18kPa 24135m 0.91m/s 0.81m/s
06:00 ☾
26% 4.8°C 0mm 85% 0cm -2.1° 7.3°C 0mm 0.16kPa 24134m 0.81m/s 0.76m/s
07:00
26% 6.4°C 0mm 84% 0cm 7.3° 8.9°C 0mm 0.18kPa 24134m 1m/s 1m/s
08:00
27% 7.6°C 0mm 78% 0cm 17° 11°C 0mm 0.29kPa 24134m 0.61m/s 0.63m/s
09:00
24% 8.3°C 0mm 76% 0cm 28° 12°C 0mm 0.34kPa 24135m 1.3m/s 1.4m/s
10:00
20% 8.9°C 0mm 74% 0cm 38° 13°C 0mm 0.4kPa 24135m 1.8m/s 1.9m/s
11:00
17% 9°C 0mm 69% 0cm 48° 15°C 0mm 0.52kPa 24135m 1.7m/s 1.9m/s
12:00
11% 8.7°C 0mm 63% 0cm 56° 16°C 0.06mm 0.67kPa 24134m 1.8m/s 2m/s
13:00
6% 8.7°C 0mm 58% 0cm 62° 17°C 0.06mm 0.83kPa 24135m 2m/s 2.1m/s
14:00
0% 8.8°C 0mm 54% 0cm 63° 18°C 0.06mm 0.96kPa 24134m 2.3m/s 2.6m/s
15:00
0% 9.1°C 0mm 53% 0cm 58° 19°C 0mm 1kPa 24135m 2.3m/s 2.8m/s
16:00
0% 9.3°C 0mm 53% 0cm 51° 19°C 0mm 1.1kPa 24135m 2.4m/s 3.2m/s
17:00
0% 9.5°C 0mm 54% 0cm 41° 19°C 0mm 1kPa 24134m 2.3m/s 3.3m/s
18:00
0% 9.4°C 0mm 55% 0cm 31° 19°C 0mm 0.95kPa 24135m 2.3m/s 3m/s
19:00
0% 9.4°C 0mm 58% 0cm 20° 18°C 0mm 0.87kPa 24134m 2.3m/s 2.8m/s
20:00
0% 11°C 0mm 70% 0cm 10° 16°C 0mm 0.56kPa 24135m 2.6m/s 2.1m/s
21:00
0% 9.3°C 0mm 81% 0cm 0.85° 12°C 0mm 0.27kPa 24134m 1.8m/s 1.8m/s
22:00 ☾
0% 8.8°C 0mm 82% 0cm -8.3° 12°C 0mm 0.25kPa 24134m 2m/s 2.3m/s
23:00 ☾
0% 8.5°C 0mm 82% 0cm -16° 11°C 0mm 0.24kPa 24134m 1.9m/s 2.2m/s
Tue, Jul 28 Sunrise 06:09 Sunset 21:07
24:00 ☾
0% 8°C 0mm 81% 0cm -21° 11°C 0mm 0.25kPa 24135m 1.9m/s 2.2m/s
01:00 ☾
0% 7.6°C 0mm 79% 0cm -24° 11°C 0mm 0.27kPa 24135m 1.9m/s 2.2m/s
02:00 ☾
0% 6.9°C 0mm 77% 0cm -25° 11°C 0mm 0.3kPa 24135m 1.8m/s 2.2m/s
03:00 ☾
22% 6.2°C 0mm 74% 0cm -23° 11°C 0mm 0.33kPa 24134m 1.5m/s 1.8m/s
04:00 ☾
45% 5.1°C 0mm 68% 0cm -18° 11°C 0mm 0.42kPa 24134m 1.7m/s 2m/s
05:00 ☾
67% 5.2°C 0mm 69% 0cm -11° 11°C 0mm 0.4kPa 24135m 1.6m/s 1.9m/s
06:00 ☾
75% 4.8°C 0mm 68% 0cm -2.3° 10°C 0mm 0.41kPa 24134m 1.5m/s 1.8m/s
07:00
84% 5.3°C 0mm 64% 0cm 7.1° 12°C 0mm 0.5kPa 24135m 1.4m/s 1.6m/s
08:00
92% 7.1°C 0mm 57% 0cm 17° 16°C 0mm 0.75kPa 24134m 0.8m/s 0.82m/s
09:00
94% 8.2°C 0mm 54% 0cm 27° 18°C 0mm 0.92kPa 24134m 1.1m/s 1.4m/s
10:00
97% 9.1°C 0mm 51% 0cm 38° 20°C 0mm 1.1kPa 24135m 1.5m/s 1.9m/s
11:00
99% 10°C 0mm 48% 0cm 48° 22°C 0mm 1.3kPa 24135m 1.8m/s 2.5m/s
12:00
86% 11°C 0.003mm 57% 0cm 56° 20°C 0mm 1kPa 24135m 1.7m/s 2.1m/s
13:00
72% 12°C 0.007mm 66% 0cm 62° 19°C 0mm 0.75kPa 24135m 1.5m/s 1.8m/s
14:00
59% 13°C 0.01mm 75% 0cm 63° 18°C 0mm 0.51kPa 24135m 1.4m/s 1.4m/s
15:00
39% 12°C 0.007mm 78% 0cm 58° 16°C 0.02mm 0.4kPa 24135m 1.5m/s 1.6m/s
16:00
20% 12°C 0.003mm 81% 0cm 50° 15°C 0.04mm 0.32kPa 24135m 1.6m/s 1.8m/s
17:00
0% 11°C 0mm 84% 0cm 41° 13°C 0.06mm 0.24kPa 24135m 1.7m/s 1.9m/s
18:00
0% 11°C 0mm 85% 0cm 31° 13°C 0.06mm 0.23kPa 24135m 2m/s 2.2m/s
19:00
0% 11°C 0mm 85% 0cm 20° 13°C 0.06mm 0.22kPa 24135m 2.3m/s 2.5m/s
20:00
0% 10°C 0mm 86% 0cm 10° 13°C 0.06mm 0.21kPa 24135m 2.7m/s 2.8m/s
21:00
2% 10°C 0.003mm 84% 0cm 0.69° 13°C 0.04mm 0.24kPa 24135m 2.6m/s 2.7m/s
22:00 ☾
5% 10°C 0.007mm 82% 0cm -8.5° 13°C 0.02mm 0.28kPa 24135m 2.5m/s 2.6m/s
23:00 ☾
7% 10°C 0.01mm 80% 0cm -16° 14°C 0mm 0.31kPa 24135m 2.4m/s 2.5m/s
Wed, Jul 29 Sunrise 06:10 Sunset 21:06
24:00 ☾
10% 11°C 0.007mm 79% 0cm -21° 14°C 0mm 0.34kPa 24135m 2.5m/s 2.4m/s
01:00 ☾
13% 11°C 0.003mm 78% 0cm -25° 15°C 0mm 0.37kPa 24135m 2.5m/s 2.3m/s
02:00 ☾
16% 11°C 0mm 77% 0cm -25° 15°C 0mm 0.41kPa 24135m 2.6m/s 2.2m/s
03:00 ☾
31% 11°C 0mm 70% 0cm -23° 17°C 0.02mm 0.57kPa 24135m 2.4m/s 2m/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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