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Rule Fog Hunter

San José - Fog Hunter - Costa Rica

San José, Provincia de San José, Costa Rica

Thick, moody fog for atmospheric forest and landscape shots

No opportunities right now
Here’s what usually blocks matches

No Fog Hunter opportunities in the next 14 days

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Rule requirements (key thresholds)
Fog Probability · ≥ 75.0%

Tip: Scroll down to the 72-hour table to see exactly which condition fails hour by hour.

Most common blockers (next 72 hours)
Fog Probability 100% failing

Currently

Real-time conditions
Dewpoint Spread2.3°C
Visibility8975 (Moderate)
Relative Humidity86%
Wind Speed2.7m/s (calm conditions)

Upcoming Opportunities

When all conditions match, PhotoWeather marks an opportunity window.

Times shown in America/Costa_Rica

No opportunities in the next 10 days

See the blocker timeline below to understand which conditions are preventing matches.

What this forecast looks for

Plain-language explanation from the rule

This forecast predicts when cloud forest conditions and valley fog create atmospheric scenes across Costa Rica's diverse elevations and microclimates. We track elevation-specific humidity, temperature differentials, and wind patterns to identify when fog and mist transform rainforest, cloud forest, and volcanic landscapes.

Costa Rica's dramatic topography creates numerous fog microclimates—from Monteverde's perpetual cloud forest mist to volcanic valley inversions to Caribbean coastal morning fog. The collision of Pacific and Caribbean weather systems over mountainous terrain produces exceptional fog photography opportunities year-round, with green season (May-November) bringing the most dramatic conditions.

What makes Costa Rica fog photography special:

  • Cloud forest immersion - Monteverde's permanent fog layer supports epiphyte-draped forests where mist is the defining feature, not occasional visitor
  • Volcanic valley fog - Arenal and Turrialba valleys fill with morning fog while volcanic peaks emerge above inversion layers
  • Microclimate transitions - Experience multiple fog types in single day—cloud forest, valley fog, coastal mist across short distances
  • Jungle emergence - Rainforest canopy trees and cecropia emerging from morning fog layers create layered atmospheric compositions

Monteverde cloud forest reserve exists because of fog—the persistent cloud layer that supports one of Earth's most biodiverse ecosystems. Here, photography captures fog as environment, with epiphytes, bromeliads, and moss-draped trees emerging from perpetual mist. The suspended bridges offer unique elevated perspectives into the fog layer. From La Fortuna, Arenal Volcano's perfect cone rises above valley fog on calm mornings, especially during green season. Turrialba Valley experiences similar inversions with the active volcano emerging above fog pools. Rincón de la Vieja's volcanic slopes create altitude-based fog layers with fumaroles adding volcanic steam to natural mist. Best conditions occur during green season when humidity is highest—arrive early as valley fog often dissipates by 8-9 AM.

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72-hour requirements breakdown

What passed or failed, hour by hour
0matching hours in the next 80 hours
AND logic: all conditions required
Meets requirement
Misses requirement
Time
America/Costa_Rica
Fog Probability
≥ 75.0%
Sat, May 23
22:0030%
23:0030%
Sun, May 24
24:0030%
01:0055%
02:0065%
03:0067%
04:0067%
05:0069%
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%
22:0049%
23:0063%
Mon, May 25
24:0063%
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%
19:0065%
20:000%
21:000%
22:000%
23:000%
Tue, May 26
24:000%
01:000%
02:0067%
03:0060%
04:0060%
05:0069%
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, May 27
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, May 24 Sunrise 05:14 Sunset 17:52
07:00
0% 16°C 0mm 86% 0cm 24° 19°C 0mm 0.29kPa 8975m 4.7m/s 2.7m/s
08:00
0% 16°C 0mm 76% 0cm 38° 21°C 0mm 0.59kPa 24135m 4.4m/s 2.6m/s
09:00
0% 17°C 0mm 69% 0cm 52° 23°C 0.06mm 0.86kPa 24134m 4.1m/s 2.7m/s
10:00
0% 17°C 0mm 64% 0cm 65° 24°C 0.25mm 1.1kPa 24134m 3.9m/s 2.8m/s
11:00
0% 17°C 0mm 62% 0cm 76° 24°C 0.5mm 1.1kPa 7038m 3.5m/s 2.9m/s
12:00
0% 17°C 0mm 64% 0cm 77° 24°C 1.1mm 1.1kPa 15096m 3.2m/s 3.2m/s
13:00
0% 18°C 0.01mm 72% 0cm 66° 23°C 1mm 0.77kPa 8199m 3.1m/s 2.8m/s
14:00
1% 18°C 0mm 76% 0cm 53° 22°C 1.9mm 0.64kPa 18899m 3.3m/s 2.7m/s
15:00
1% 18°C 0mm 79% 0cm 39° 21°C 2.6mm 0.53kPa 13969m 3.1m/s 2.6m/s
16:00
1% 17°C 0mm 82% 0cm 25° 21°C 2.7mm 0.44kPa 10380m 3.4m/s 2.5m/s
17:00
0% 17°C 0mm 87% 0cm 11° 19°C 2.8mm 0.3kPa 23536m 3.4m/s 2.2m/s
18:00
0% 17°C 0mm 93% 0cm -2.5° 18°C 2.8mm 0.14kPa 24135m 3.7m/s 2m/s
19:00
0% 16°C 0mm 92% 0cm -16° 17°C 0.06mm 0.17kPa 9533m 3.8m/s 2.1m/s
20:00
0% 16°C 0mm 93% 0cm -29° 17°C 0.19mm 0.14kPa 3403m 4.1m/s 2.1m/s
21:00
0% 16°C 0mm 94% 0cm -41° 17°C 0.25mm 0.13kPa 1325m 4.3m/s 2m/s
22:00
0% 16°C 0mm 94% 0cm -52° 17°C 0.31mm 0.11kPa 474m 4.3m/s 2m/s
23:00
0% 17°C 0mm 96% 0cm -58° 17°C 0.38mm 0.07kPa 205m 4.3m/s 2m/s
Mon, May 25 Sunrise 05:14 Sunset 17:52
24:00
0% 17°C 0mm 97% 0cm -58° 17°C 0.44mm 0.06kPa 141m 4.2m/s 1.9m/s
01:00
0% 16°C 0mm 94% 0cm -52° 17°C 0.06mm 0.12kPa 556m 4.4m/s 2.2m/s
02:00
0% 16°C 0mm 93% 0cm -43° 17°C 0.06mm 0.14kPa 20938m 4.9m/s 2.4m/s
03:00
0% 16°C 0mm 95% 0cm -31° 16°C 0.06mm 0.09kPa 7869m 4.8m/s 2.5m/s
04:00
0% 15°C 0mm 94% 0cm -18° 16°C 0.06mm 0.11kPa 10560m 5m/s 2.6m/s
05:00
0% 15°C 0mm 91% 0cm -4° 16°C 0.06mm 0.16kPa 24134m 4.9m/s 2.5m/s
06:00
0% 15°C 0mm 90% 0cm 9.8° 16°C 0.06mm 0.18kPa 24135m 5.5m/s 2.6m/s
07:00
0% 15°C 0mm 83% 0cm 24° 18°C 0mm 0.36kPa 13390m 4.9m/s 2.7m/s
08:00
0% 15°C 0mm 73% 0cm 38° 20°C 0mm 0.62kPa 24134m 4.5m/s 2.8m/s
09:00
0% 15°C 0mm 65% 0cm 52° 22°C 0mm 0.92kPa 24134m 4.5m/s 2.8m/s
10:00
0% 15°C 0mm 58% 0cm 65° 24°C 0mm 1.2kPa 24134m 4.2m/s 2.7m/s
11:00
0% 15°C 0mm 53% 0cm 76° 25°C 0.06mm 1.5kPa 24135m 4.6m/s 2.9m/s
12:00
0% 15°C 0.01mm 52% 0cm 77° 25°C 0.19mm 1.6kPa 24134m 3.9m/s 3m/s
13:00
0% 15°C 0mm 55% 0cm 66° 25°C 0.13mm 1.4kPa 24135m 3.2m/s 3.1m/s
14:00
0% 16°C 0mm 63% 0cm 53° 24°C 0.38mm 1.1kPa 13921m 2.9m/s 2.8m/s
15:00
0% 17°C 0mm 70% 0cm 39° 22°C 0.81mm 0.8kPa 17706m 3.1m/s 2.6m/s
16:00
0% 17°C 0mm 79% 0cm 25° 21°C 1.3mm 0.51kPa 4698m 3m/s 2.3m/s
17:00
0% 17°C 0mm 88% 0cm 11° 19°C 1.4mm 0.26kPa 5378m 3m/s 1.9m/s
18:00
0% 17°C 0mm 94% 0cm -2.4° 18°C 1.5mm 0.13kPa 3878m 3.1m/s 1.7m/s
19:00
0% 17°C 0mm 95% 0cm -16° 18°C 0mm 0.1kPa 7188m 3.1m/s 1.6m/s
20:00
0% 17°C 0mm 94% 0cm -29° 17°C 0.06mm 0.12kPa 20084m 3.4m/s 1.7m/s
21:00
0% 16°C 0mm 92% 0cm -41° 17°C 0.06mm 0.15kPa 24134m 3.3m/s 1.7m/s
22:00
0% 16°C 0mm 92% 0cm -51° 17°C 0.06mm 0.17kPa 7204m 3.2m/s 1.8m/s
23:00
0% 16°C 0mm 91% 0cm -58° 17°C 0.06mm 0.17kPa 3641m 3.4m/s 1.6m/s
Tue, May 26 Sunrise 05:14 Sunset 17:52
24:00
0% 16°C 0mm 91% 0cm -58° 17°C 0.13mm 0.17kPa 5374m 3.2m/s 1.6m/s
01:00
0% 16°C 0mm 94% 0cm -52° 17°C 0mm 0.11kPa 24134m 3.2m/s 1.6m/s
02:00
0% 16°C 0mm 96% 0cm -42° 16°C 0mm 0.08kPa 7906m 2.9m/s 1.6m/s
03:00
0% 16°C 0.01mm 96% 0cm -30° 16°C 0mm 0.08kPa 8587m 3.2m/s 1.6m/s
04:00
0% 16°C 0mm 96% 0cm -18° 16°C 0mm 0.08kPa 8036m 3.4m/s 1.7m/s
05:00
0% 15°C 0mm 98% 0cm -4° 16°C 0mm 0.04kPa 3661m 3.1m/s 1.7m/s
06:00
0% 16°C 0mm 94% 0cm 9.8° 17°C 0mm 0.12kPa 6412m 3.4m/s 1.8m/s
07:00
0% 16°C 0mm 82% 0cm 24° 19°C 0mm 0.39kPa 24134m 3.5m/s 2.1m/s
08:00
0% 15°C 0mm 70% 0cm 38° 21°C 0mm 0.74kPa 24135m 2.8m/s 2m/s
09:00
0% 15°C 0mm 61% 0cm 52° 23°C 0.06mm 1.1kPa 24135m 2.5m/s 2.2m/s
10:00
0% 15°C 0mm 62% 0cm 65° 23°C 0.31mm 1.1kPa 21856m 2.4m/s 2.2m/s
11:00
0% 16°C 0mm 75% 0cm 76° 21°C 0.94mm 0.61kPa 9403m 2.1m/s 2.1m/s
12:00
0% 17°C 0mm 78% 0cm 77° 21°C 1.8mm 0.53kPa 18703m 2.1m/s 2.1m/s
13:00
0% 17°C 0.73mm 84% 0cm 66° 19°C 7.6mm 0.35kPa 14355m 3.1m/s 2.1m/s
14:00
0% 17°C 1.5mm 90% 0cm 53° 18°C 14mm 0.2kPa 10007m 4m/s 2.1m/s
15:00
0% 16°C 2.2mm 97% 0cm 39° 17°C 19mm 0.06kPa 5658m 5m/s 2.1m/s
16:00
0% 16°C 1.5mm 96% 0cm 25° 16°C 20mm 0.07kPa 11283m 4.9m/s 2.1m/s
17:00
0% 15°C 0.84mm 95% 0cm 11° 16°C 21mm 0.08kPa 16908m 4.9m/s 2.1m/s
18:00
0% 15°C 0.16mm 95% 0cm -2.4° 16°C 22mm 0.09kPa 22533m 4.8m/s 2.1m/s
19:00
0% 15°C 0.11mm 93% 0cm -16° 16°C 15mm 0.13kPa 23067m 3.6m/s 1.9m/s
20:00
0% 15°C 0.05mm 91% 0cm -29° 16°C 7.5mm 0.17kPa 23601m 2.5m/s 1.6m/s
21:00
0% 14°C 0mm 88% 0cm -41° 16°C 0.06mm 0.21kPa 24135m 1.3m/s 1.4m/s
22:00
0% 14°C 0.003mm 89% 0cm -51° 16°C 0.06mm 0.19kPa 24135m 1.7m/s 1.5m/s
23:00
0% 14°C 0.007mm 90% 0cm -58° 16°C 0.06mm 0.17kPa 24135m 2m/s 1.6m/s
Wed, May 27 Sunrise 05:14 Sunset 17:52
24:00
0% 14°C 0.01mm 91% 0cm -58° 16°C 0.06mm 0.15kPa 24135m 2.3m/s 1.6m/s
01:00
0% 15°C 0.007mm 84% 0cm -52° 18°C 0.04mm 0.33kPa 24135m 1.9m/s 1.2m/s
02:00
0% 16°C 0.003mm 76% 0cm -42° 20°C 0.02mm 0.55kPa 24135m 1.5m/s 0.83m/s
03:00
0% 16°C 0mm 68% 0cm -30° 22°C 0mm 0.83kPa 24135m 1m/s 0.43m/s
04:00
0% 16°C 0mm 67% 0cm -18° 22°C 0.06mm 0.88kPa 21098m 1.2m/s 0.77m/s
05:00
0% 16°C 0mm 66% 0cm -4° 23°C 0.13mm 0.93kPa 18060m 1.3m/s 1.1m/s
06:00
0% 16°C 0mm 66% 0cm 9.8° 23°C 0.19mm 0.98kPa 15023m 1.5m/s 1.4m/s
How to read: these inputs help produce the derived score; they are not requirements by themselves.

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