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Rule Fog Hunter

Turrialba - Fog Hunter - Costa Rica

Turrialba, Cartago Province, Costa Rica

Thick, moody fog for atmospheric forest and landscape shots

Currently

Real-time conditions
Fog Probability
0%
Dewpoint Spread1.6°C
Visibility24134 (Clear)
Relative Humidity91%
Wind Speed0.8m/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
Turrialba
Today · 21:00–23:00 · 2h window
High confidence
91%
🌫️Fog Probability88.6-100%
Dewpoint Spread: 0.2°C
Visibility: 952 (Fog)
Relative Humidity: 99%
Wind Speed: 0.3m/s (calm conditions)
fog weather icon
Dense Fog at Dawn
Turrialba
Tomorrow · 04:00–05:00
🌫️Fog Probability:86%
Medium
fog weather icon
Dense Fog at Sunrise
Turrialba
Tomorrow · 05:00–06:00
🌫️Fog Probability:100%
High
fog weather icon
Dense Fog
Turrialba
Fri, Jul 10 · 01:00–04:00
🌫️Fog Probability:98.5-100%
High

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
14matching hours in the next 95 hoursJump to next match
AND logic: all conditions required
Meets requirement
Misses requirement
Time
America/Costa_Rica
Fog Probability
≥ 75.0%
Tue, Jul 7
07:000%
08:000%
09:000%
10:000%
11:000%
12:000%
13:000%
14:000%
15:000%
16:000%
17:000%
18:000%
19:00100%
20:00100%
21:00100%
22:0099%
23:0086%
Wed, Jul 8
24:0069%
01:0067%
02:0067%
03:0099%
04:0099%
05:0069%
06:0058%
07:000%
08:000%
09:000%
10:000%
11:000%
12:000%
13:000%
14:000%
15:000%
16:000%
17:000%
18:000%
19:0055%
20:0073%
21:0089%
22:00100%
23:0063%
Thu, Jul 9
24:0065%
01:0069%
02:0071%
03:0073%
04:0086%
05:00100%
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%
20:0067%
21:0065%
22:0066%
23:0056%
Fri, Jul 10
24:0065%
01:00100%
02:00100%
03:0099%
04:0058%
05:0055%
06:0053%
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%
Sat, Jul 11
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
Wed, Jul 8 Sunrise 05:19 Sunset 17:59
07:00
19% 18°C 0mm 91% 0cm 22° 19°C 0mm 0.21kPa 24134m 1.8m/s 0.84m/s
08:00
32% 18°C 0mm 83% 0cm 36° 21°C 0mm 0.4kPa 24135m 2.2m/s 1.6m/s
09:00
44% 18°C 0mm 75% 0cm 50° 22°C 0.06mm 0.69kPa 24135m 2.9m/s 2.2m/s
10:00
40% 18°C 0mm 70% 0cm 63° 24°C 0.13mm 0.89kPa 24135m 2.9m/s 2.5m/s
11:00
35% 18°C 0mm 71% 0cm 74° 24°C 0.25mm 0.87kPa 22451m 2.8m/s 2.8m/s
12:00
31% 19°C 0mm 74% 0cm 77° 24°C 0.75mm 0.76kPa 18941m 2.5m/s 2.6m/s
13:00
24% 19°C 0mm 80% 0cm 67° 23°C 0.94mm 0.54kPa 20592m 2.4m/s 2.6m/s
14:00
17% 19°C 0mm 82% 0cm 54° 23°C 1.8mm 0.5kPa 20816m 2.7m/s 2.6m/s
15:00
10% 19°C 0mm 86% 0cm 41° 22°C 2.4mm 0.36kPa 19922m 2.6m/s 2.3m/s
16:00
8% 19°C 0mm 88% 0cm 27° 21°C 2.8mm 0.3kPa 5514m 2.5m/s 1.9m/s
17:00
5% 18°C 0mm 91% 0cm 13° 20°C 3.2mm 0.2kPa 4300m 2.2m/s 1.5m/s
18:00 ☾
3% 18°C 0mm 96% 0cm -0.41° 19°C 3.4mm 0.09kPa 4577m 1.7m/s 0.93m/s
19:00 ☾
3% 18°C 0mm 96% 0cm -14° 19°C 0.06mm 0.08kPa 21635m 1.3m/s 0.64m/s
20:00 ☾
2% 18°C 0mm 99% 0cm -27° 18°C 0.13mm 0.03kPa 23934m 0.9m/s 0.38m/s
21:00 ☾
2% 17°C 0mm 99% 0cm -39° 17°C 0.19mm 0.02kPa 5894m 0.8m/s 0.24m/s
22:00 ☾
2% 17°C 0mm 99% 0cm -49° 18°C 0.19mm 0.02kPa 952m 0.82m/s 0.31m/s
23:00 ☾
1% 18°C 0mm 98% 0cm -56° 18°C 0.25mm 0.04kPa 738m 1.3m/s 0.2m/s
Thu, Jul 9 Sunrise 05:20 Sunset 17:59
24:00 ☾
1% 18°C 0mm 99% 0cm -57° 18°C 0.31mm 0.03kPa 598m 1.4m/s 0.43m/s
01:00 ☾
1% 18°C 0mm 98% 0cm -52° 18°C 0.06mm 0.04kPa 644m 1.4m/s 0.32m/s
02:00 ☾
1% 18°C 0mm 97% 0cm -43° 18°C 0.06mm 0.06kPa 20861m 1.4m/s 0.23m/s
03:00 ☾
1% 17°C 0mm 98% 0cm -31° 17°C 0.13mm 0.03kPa 20859m 0.8m/s 0.31m/s
04:00 ☾
1% 18°C 0mm 98% 0cm -19° 18°C 0.19mm 0.04kPa 3198m 1.2m/s 0.22m/s
05:00 ☾
0% 18°C 0mm 98% 0cm -5.3° 18°C 0.19mm 0.05kPa 1119m 1.2m/s 0.26m/s
06:00
0% 18°C 0mm 98% 0cm 8.4° 18°C 0.25mm 0.05kPa 929m 1.7m/s 0.44m/s
07:00
1% 18°C 0mm 95% 0cm 22° 19°C 0.06mm 0.11kPa 20917m 1.5m/s 0.85m/s
08:00
2% 18°C 0mm 92% 0cm 36° 20°C 0.25mm 0.18kPa 24135m 1.8m/s 1.3m/s
09:00
3% 19°C 0mm 88% 0cm 50° 21°C 0.63mm 0.3kPa 18941m 2.2m/s 1.7m/s
10:00
2% 19°C 0mm 87% 0cm 63° 22°C 2mm 0.35kPa 6400m 2.8m/s 2.1m/s
11:00
2% 20°C 0mm 89% 0cm 74° 21°C 3.8mm 0.28kPa 7177m 2.8m/s 2.2m/s
12:00
1% 20°C 0mm 91% 0cm 77° 21°C 6mm 0.23kPa 5527m 2.9m/s 2.3m/s
13:00
1% 20°C 0mm 94% 0cm 67° 21°C 2.4mm 0.14kPa 1036m 3.5m/s 2.6m/s
14:00
0% 20°C 0.01mm 96% 0cm 54° 20°C 4.6mm 0.11kPa 1037m 3.2m/s 2.2m/s
15:00
0% 20°C 0mm 95% 0cm 41° 20°C 6mm 0.12kPa 1004m 2.9m/s 2m/s
16:00
0% 19°C 0mm 96% 0cm 27° 20°C 6.8mm 0.08kPa 823m 2.6m/s 1.7m/s
17:00
0% 19°C 0.02mm 98% 0cm 13° 19°C 7.4mm 0.04kPa 568m 2.5m/s 1.4m/s
18:00 ☾
0% 19°C 0.02mm 99% 0cm -0.39° 19°C 7.6mm 0.01kPa 162m 1.8m/s 0.77m/s
19:00 ☾
0% 18°C 0mm 99% 0cm -14° 18°C 0.06mm 0.02kPa 270m 2.1m/s 0.93m/s
20:00 ☾
0% 18°C 0mm 99% 0cm -27° 18°C 0.25mm 0.02kPa 418m 1.7m/s 0.7m/s
21:00 ☾
0% 18°C 0mm 99% 0cm -39° 18°C 0.44mm 0.03kPa 692m 1.4m/s 0.61m/s
22:00 ☾
0% 18°C 0mm 99% 0cm -50° 18°C 0.5mm 0.02kPa 679m 1.3m/s 0.38m/s
23:00 ☾
0% 17°C 0mm 98% 0cm -56° 18°C 0.5mm 0.03kPa 2486m 0.83m/s 0.51m/s
Fri, Jul 10 Sunrise 05:20 Sunset 17:59
24:00 ☾
0% 18°C 0mm 98% 0cm -58° 18°C 0.56mm 0.04kPa 666m 0.93m/s 0.54m/s
01:00 ☾
0% 17°C 0mm 98% 0cm -52° 18°C 0.06mm 0.04kPa 974m 0.83m/s 0.24m/s
02:00 ☾
0% 17°C 0mm 98% 0cm -43° 18°C 0.13mm 0.04kPa 1162m 0.81m/s 0.26m/s
03:00 ☾
0% 17°C 0mm 98% 0cm -31° 18°C 0.13mm 0.04kPa 1641m 0.71m/s 0.37m/s
04:00 ☾
0% 17°C 0mm 97% 0cm -19° 18°C 0.13mm 0.06kPa 24134m 0.4m/s 0.36m/s
05:00 ☾
0% 17°C 0mm 96% 0cm -5.3° 18°C 0.13mm 0.07kPa 24134m 0.5m/s 0.19m/s
06:00
0% 17°C 0mm 96% 0cm 8.4° 18°C 0.19mm 0.09kPa 24134m 0.62m/s 0.22m/s
07:00
0% 17°C 0mm 94% 0cm 22° 18°C 0.13mm 0.14kPa 24135m 0.84m/s 0.4m/s
08:00
0% 18°C 0mm 90% 0cm 36° 20°C 0.19mm 0.22kPa 24134m 1.1m/s 0.74m/s
09:00
0% 18°C 0mm 85% 0cm 50° 21°C 0.44mm 0.37kPa 19261m 1.7m/s 1.5m/s
10:00
0% 18°C 0mm 80% 0cm 63° 22°C 1.1mm 0.55kPa 8816m 2.3m/s 2m/s
11:00
0% 19°C 0mm 87% 0cm 74° 22°C 2.4mm 0.34kPa 10069m 2.2m/s 2.1m/s
12:00
0% 20°C 0mm 89% 0cm 77° 21°C 3.7mm 0.29kPa 7807m 2.2m/s 2.1m/s
13:00
0% 20°C 0mm 92% 0cm 67° 21°C 4.9mm 0.21kPa 6955m 1.7m/s 1.6m/s
14:00
0% 21°C 0mm 95% 0cm 54° 21°C 6mm 0.12kPa 6103m 1.2m/s 1.1m/s
15:00
0% 21°C 0mm 98% 0cm 41° 21°C 7.2mm 0.04kPa 5251m 0.71m/s 0.62m/s
16:00
0% 21°C 0.37mm 98% 0cm 27° 21°C 9.2mm 0.05kPa 5270m 0.82m/s 0.82m/s
17:00
0% 21°C 0.73mm 98% 0cm 13° 21°C 11mm 0.05kPa 5289m 0.93m/s 1m/s
18:00 ☾
0% 21°C 1.1mm 98% 0cm -0.38° 21°C 13mm 0.05kPa 5308m 1m/s 1.2m/s
19:00 ☾
0% 21°C 0.85mm 98% 0cm -14° 21°C 10mm 0.06kPa 8042m 0.94m/s 1.1m/s
20:00 ☾
0% 20°C 0.59mm 97% 0cm -27° 21°C 7.2mm 0.07kPa 10776m 0.84m/s 0.94m/s
21:00 ☾
0% 20°C 0.34mm 97% 0cm -39° 21°C 4.1mm 0.08kPa 13510m 0.74m/s 0.8m/s
22:00 ☾
0% 20°C 0.26mm 96% 0cm -50° 21°C 4.5mm 0.09kPa 17051m 0.86m/s 0.92m/s
23:00 ☾
0% 20°C 0.17mm 96% 0cm -57° 21°C 4.9mm 0.1kPa 20593m 0.99m/s 1m/s
Sat, Jul 11 Sunrise 05:20 Sunset 17:59
24:00 ☾
0% 20°C 0.09mm 95% 0cm -58° 21°C 5.3mm 0.11kPa 24135m 1.1m/s 1.2m/s
01:00 ☾
0% 21°C 0.06mm 94% 0cm -53° 22°C 3.7mm 0.16kPa 21395m 1.1m/s 0.98m/s
02:00 ☾
0% 21°C 0.03mm 93% 0cm -43° 23°C 2.2mm 0.2kPa 18656m 1.1m/s 0.78m/s
03:00 ☾
0% 22°C 0mm 91% 0cm -32° 23°C 0.69mm 0.25kPa 15916m 1m/s 0.59m/s
04:00 ☾
0% 22°C 0.11mm 92% 0cm -19° 23°C 1.7mm 0.23kPa 14345m 0.86m/s 0.6m/s
05:00 ☾
0% 22°C 0.21mm 93% 0cm -5.4° 23°C 2.7mm 0.2kPa 12775m 0.7m/s 0.61m/s
06:00
0% 22°C 0.32mm 94% 0cm 8.3° 23°C 3.7mm 0.18kPa 11205m 0.54m/s 0.62m/s
How to read: these inputs help produce the derived score; they are not requirements by themselves.

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