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Rule Fog Hunter

Fog Hunter Forecast for San José, Costa Rica

San José, Provincia de San José, Costa Rica

San José spreads across elevated neighbourhoods within the Central Valley. Dense roofs, church towers, and modern blocks overlap below the ridges that enclose the capital.

Currently

Real-time conditions
Fog Probability
0%
Dewpoint Spread1.0°C
Visibility2648 (Mist/Haze)
Relative Humidity94%
Wind Speed2.5m/s (calm conditions)

Upcoming Opportunities

When all conditions match, PhotoWeather marks an opportunity window.

Times shown in America/Costa_Rica
fog weather icon
Next opportunity
Dense Fog
San José
Tomorrow · 01:00–04:00 · 3h window
High confidence
94%
🌫️Fog Probability100%
Dewpoint Spread: 0.3°C
Visibility: 135 (Dense fog)
Relative Humidity: 98%
Wind Speed: 2.3m/s (calm conditions)
fog weather icon
Dense Fog
San José
Thu, Jul 23 · 15:00–17:00
🌫️Fog Probability:80.8-96.2%
Medium
fog weather icon
Dense Fog
San José
Thu, Jul 23 · 20:00–23:00
🌫️Fog Probability:86-100%
High
fog weather icon
Dense Fog
San José
Sat, Jul 25 · 19:00–23:00
🌫️Fog Probability:77.1-88.6%
Low

How this forecast is evaluated

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

Explore Fog Hunter conditions across Costa Rica →

Recorded match history

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

Last 30 days
44
recorded matching windows · 84% average confidence
Last 90 days
77
recorded matching windows · 82% average confidence
Last 365 days
77
recorded matching windows · 82% average confidence
Most frequent recorded start hour

19:00 local time, shared by 22 of 77 matches recorded in the last 365 days.

Most represented month

July, with 34 of 77 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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80-hour requirements breakdown

When available, the detailed table below covers only the stated 80-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
4matching hours in the next 80 hoursJump to next match
AND logic: all conditions required
Meets requirement
Misses requirement
Time
America/Costa_Rica
Fog Probability
≥ 75.0%
Sat, Jul 18
22:0063%
23:0065%
Sun, Jul 19
24:0065%
01:0067%
02:0067%
03:0078%
04:0069%
05:0063%
06:0063%
07:000%
08:000%
09:000%
10:000%
11:000%
12:000%
13:000%
14:000%
15:000%
16:000%
17:000%
18:000%
19:0069%
20:000%
21:000%
22:0044%
23:0060%
Mon, Jul 20
24:0065%
01:00100%
02:00100%
03:00100%
04:0063%
05:0057%
06:0047%
07:0075%
08:0050%
09:0052%
10:000%
11:000%
12:000%
13:0049%
14:0030%
15:0030%
16:0030%
17:000%
18:000%
19:000%
20:000%
21:000%
22:000%
23:000%
Tue, Jul 21
24:000%
01:000%
02:000%
03:000%
04:000%
05:000%
06:000%
07:0069%
08:0046%
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 22
24:000%
01:000%
02:000%
03:000%
04:000%
05:000%
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
America/Costa_Rica
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 19 Sunrise 05:23 Sunset 18:01
07:00
0% 16°C 0mm 94% 0cm 22° 17°C 0mm 0.12kPa 2648m 4.5m/s 2.5m/s
08:00
0% 16°C 0mm 86% 0cm 36° 18°C 0mm 0.3kPa 4098m 4.8m/s 2.7m/s
09:00
0% 16°C 0mm 77% 0cm 49° 20°C 0.06mm 0.55kPa 24134m 4.7m/s 2.8m/s
10:00
0% 15°C 0mm 68% 0cm 63° 21°C 0.13mm 0.83kPa 24135m 4.8m/s 3m/s
11:00
0% 15°C 0mm 63% 0cm 75° 22°C 0.19mm 0.99kPa 24135m 5.3m/s 3.3m/s
12:00
0% 15°C 0mm 71% 0cm 78° 20°C 0.25mm 0.69kPa 24134m 4.8m/s 3.3m/s
13:00
1% 15°C 0mm 77% 0cm 69° 19°C 0.13mm 0.51kPa 24135m 4.4m/s 2.7m/s
14:00
1% 15°C 0mm 79% 0cm 55° 19°C 0.19mm 0.45kPa 17396m 4.3m/s 2.6m/s
15:00
2% 15°C 0mm 77% 0cm 41° 19°C 0.25mm 0.51kPa 5078m 4.2m/s 2.6m/s
16:00
1% 15°C 0mm 76% 0cm 27° 19°C 0.31mm 0.52kPa 4500m 4.8m/s 2.9m/s
17:00
1% 15°C 0mm 85% 0cm 13° 18°C 0.38mm 0.3kPa 21690m 5.1m/s 2.6m/s
18:00 ☾
0% 15°C 0mm 95% 0cm 0.07° 16°C 0.5mm 0.09kPa 5014m 5.5m/s 2.7m/s
19:00 ☾
0% 15°C 0mm 94% 0cm -14° 16°C 0mm 0.1kPa 956m 5.8m/s 2.7m/s
20:00 ☾
0% 15°C 0mm 93% 0cm -27° 16°C 0.13mm 0.12kPa 19875m 5.8m/s 2.9m/s
21:00 ☾
0% 15°C 0mm 93% 0cm -40° 16°C 0.19mm 0.13kPa 4644m 5.6m/s 2.9m/s
22:00 ☾
0% 15°C 0mm 94% 0cm -50° 16°C 0.25mm 0.1kPa 1436m 5.9m/s 2.7m/s
23:00 ☾
0% 15°C 0mm 97% 0cm -58° 16°C 0.25mm 0.05kPa 1013m 5.6m/s 2.6m/s
Mon, Jul 20 Sunrise 05:24 Sunset 18:01
24:00 ☾
0% 16°C 0.01mm 98% 0cm -59° 16°C 0.25mm 0.03kPa 169m 5.3m/s 2.3m/s
01:00 ☾
0% 16°C 0mm 98% 0cm -54° 16°C 0mm 0.05kPa 135m 5m/s 2.3m/s
02:00 ☾
0% 16°C 0.01mm 98% 0cm -44° 16°C 0.06mm 0.05kPa 185m 4.2m/s 2m/s
03:00 ☾
0% 16°C 0mm 98% 0cm -33° 16°C 0.19mm 0.04kPa 231m 3.8m/s 1.9m/s
04:00 ☾
0% 16°C 0mm 96% 0cm -20° 16°C 0.25mm 0.07kPa 434m 4.1m/s 1.9m/s
05:00 ☾
0% 16°C 0mm 95% 0cm -6.3° 16°C 0.38mm 0.09kPa 1073m 4.1m/s 2m/s
06:00
0% 15°C 0mm 95% 0cm 7.6° 16°C 0.5mm 0.09kPa 693m 3.8m/s 1.8m/s
07:00
0% 16°C 0.02mm 94% 0cm 21° 16°C 0.06mm 0.11kPa 660m 3.7m/s 1.8m/s
08:00
0% 16°C 0.22mm 95% 0cm 36° 17°C 0.38mm 0.09kPa 353m 2.9m/s 1.5m/s
09:00
0% 16°C 0.11mm 97% 0cm 49° 16°C 0.63mm 0.05kPa 441m 3.1m/s 1.3m/s
10:00
0% 16°C 1.5mm 97% 0cm 63° 17°C 1.7mm 0.06kPa 603m 2.5m/s 1.1m/s
11:00
0% 17°C 3.1mm 98% 0cm 75° 17°C 5.4mm 0.05kPa 253m 2.7m/s 1.4m/s
12:00
0% 16°C 0.27mm 98% 0cm 79° 17°C 7mm 0.04kPa 189m 3.4m/s 1.7m/s
13:00
0% 16°C 0.01mm 96% 0cm 69° 17°C 0.31mm 0.07kPa 690m 3.7m/s 2.1m/s
14:00
0% 16°C 0.01mm 96% 0cm 55° 17°C 0.56mm 0.07kPa 4288m 3.9m/s 2m/s
15:00
0% 16°C 0.01mm 96% 0cm 41° 17°C 0.69mm 0.07kPa 3909m 3.6m/s 1.9m/s
16:00
0% 16°C 0.18mm 97% 0cm 27° 17°C 0.75mm 0.06kPa 3922m 3.2m/s 1.8m/s
17:00
0% 16°C 5.1mm 98% 0cm 13° 16°C 3.6mm 0.03kPa 687m 3.3m/s 1.7m/s
18:00 ☾
0% 16°C 3mm 99% 0cm 0.05° 16°C 8.8mm 0.01kPa 346m 3.1m/s 1.4m/s
19:00 ☾
0% 16°C 1.8mm 99% 0cm -14° 16°C 2.3mm 0.02kPa 171m 3.6m/s 1.6m/s
20:00 ☾
0% 16°C 0.67mm 99% 0cm -27° 16°C 3.4mm 0.02kPa 516m 3.6m/s 1.6m/s
21:00 ☾
0% 15°C 0.58mm 98% 0cm -40° 16°C 4.1mm 0.03kPa 3023m 4.3m/s 1.8m/s
22:00 ☾
0% 15°C 0.69mm 98% 0cm -50° 16°C 4.9mm 0.03kPa 5891m 3.3m/s 1.7m/s
23:00 ☾
0% 16°C 1.4mm 99% 0cm -58° 16°C 6.1mm 0.02kPa 2071m 2.3m/s 1.2m/s
Tue, Jul 21 Sunrise 05:24 Sunset 18:01
24:00 ☾
0% 16°C 3.8mm 99% 0cm -59° 16°C 8.9mm 0.01kPa 224m 2.6m/s 1.3m/s
01:00 ☾
0% 16°C 2.2mm 99% 0cm -54° 16°C 3.6mm 0.01kPa 140m 3.3m/s 1.6m/s
02:00 ☾
0% 16°C 0.59mm 99% 0cm -45° 16°C 4.8mm 0.02kPa 135m 3.3m/s 1.6m/s
03:00 ☾
0% 16°C 0.24mm 99% 0cm -33° 16°C 5.3mm 0.02kPa 192m 3.3m/s 1.6m/s
04:00 ☾
0% 16°C 0.01mm 99% 0cm -20° 16°C 5.4mm 0.02kPa 722m 3.2m/s 1.3m/s
05:00 ☾
0% 16°C 0mm 98% 0cm -6.3° 16°C 5.4mm 0.03kPa 3934m 3m/s 1.4m/s
06:00
0% 15°C 0mm 98% 0cm 7.6° 16°C 5.4mm 0.03kPa 5847m 3.5m/s 1.8m/s
07:00
0% 16°C 0mm 98% 0cm 21° 16°C 0mm 0.04kPa 4014m 2.5m/s 1.3m/s
08:00
0% 16°C 0mm 95% 0cm 36° 17°C 0mm 0.09kPa 8010m 2.4m/s 1.3m/s
09:00
0% 17°C 0mm 89% 0cm 49° 18°C 0mm 0.24kPa 24134m 1.5m/s 0.97m/s
10:00
0% 17°C 0mm 78% 0cm 63° 21°C 0.13mm 0.53kPa 22393m 2m/s 1.6m/s
11:00
0% 17°C 0.08mm 81% 0cm 75° 20°C 0.69mm 0.46kPa 12115m 1.9m/s 1.7m/s
12:00
0% 18°C 0.27mm 96% 0cm 79° 18°C 1.4mm 0.09kPa 718m 2.8m/s 1.9m/s
13:00
0% 17°C 2.5mm 97% 0cm 69° 18°C 6.6mm 0.06kPa 541m 2.5m/s 1.5m/s
14:00
0% 17°C 4.7mm 98% 0cm 55° 17°C 12mm 0.04kPa 364m 2.1m/s 1.1m/s
15:00
0% 16°C 6.9mm 99% 0cm 41° 16°C 17mm 0.01kPa 187m 1.7m/s 0.68m/s
16:00
0% 16°C 5.4mm 99% 0cm 27° 16°C 24mm 0.01kPa 249m 2.4m/s 1.1m/s
17:00
0% 16°C 3.8mm 99% 0cm 13° 16°C 32mm 0.02kPa 312m 3.1m/s 1.4m/s
18:00 ☾
0% 16°C 2.3mm 99% 0cm 0.03° 16°C 39mm 0.02kPa 374m 3.7m/s 1.8m/s
19:00 ☾
0% 16°C 1.5mm 99% 0cm -14° 16°C 27mm 0.02kPa 619m 3.7m/s 1.8m/s
20:00 ☾
0% 16°C 0.82mm 99% 0cm -27° 16°C 15mm 0.02kPa 864m 3.7m/s 1.8m/s
21:00 ☾
0% 16°C 0.09mm 99% 0cm -40° 16°C 2.5mm 0.02kPa 1110m 3.8m/s 1.9m/s
22:00 ☾
0% 16°C 0.06mm 99% 0cm -51° 16°C 2.5mm 0.02kPa 2588m 3.6m/s 1.8m/s
23:00 ☾
0% 16°C 0.04mm 99% 0cm -58° 16°C 2.5mm 0.02kPa 4066m 3.4m/s 1.7m/s
Wed, Jul 22 Sunrise 05:24 Sunset 18:00
24:00 ☾
0% 16°C 0.01mm 99% 0cm -60° 16°C 2.6mm 0.02kPa 5544m 3.2m/s 1.6m/s
01:00 ☾
0% 16°C 0.03mm 96% 0cm -54° 17°C 1.7mm 0.08kPa 11741m 2.4m/s 1.1m/s
02:00 ☾
0% 16°C 0.04mm 92% 0cm -45° 17°C 0.85mm 0.15kPa 17938m 1.5m/s 0.67m/s
03:00 ☾
0% 16°C 0.06mm 89% 0cm -33° 18°C 0mm 0.22kPa 24135m 0.6m/s 0.22m/s
04:00 ☾
0% 17°C 0.04mm 90% 0cm -20° 18°C 0.46mm 0.2kPa 23818m 0.85m/s 0.4m/s
05:00 ☾
0% 17°C 0.02mm 92% 0cm -6.4° 18°C 0.92mm 0.17kPa 23500m 1.1m/s 0.57m/s
06:00
0% 17°C 0mm 93% 0cm 7.5° 18°C 1.4mm 0.15kPa 23183m 1.3m/s 0.74m/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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