How likely fog is to form. High scores mean misty, atmospheric conditions for moody landscape and sunrise photography.
Moisture-first fog probability. Scores high when air is saturated even with good visibility. Low visibility alone (haze, smoke) scores zero without moisture confirmation.
Use these as planning patterns, then adjust thresholds for your subject, season, and location.
Fog usually needs several ingredients at once, so the combined score is a better starting point than humidity by itself.
High fog probability close to sunrise with light wind and a small temperature-dew point spread
High humidity alone when wind, visibility, or temperature spread do not support fog
Fog is highly local, so the score should shortlist windows before you apply location knowledge.
Use the score to find soft depth, separation, and low-level atmosphere around valleys, lakes, and forests
Assuming grid-scale fog will form exactly at your composition without checking terrain and water nearby
Fog Probability predicts the likelihood of fog forming by combining humidity, temperature, dewpoint, wind, and time of day. Scores are highest when the air is saturated with moisture and conditions are calm—exactly when fog tends to appear. The score peaks during the prime fog window from late night through early morning, when radiation fog is most common.
Target the calm, moist dawn windows where fog is most likely to form and hold.
Use the combined score as a shortlist, then apply terrain knowledge to pick the right location.
Inspect visibility as one of the forecast signals behind Fog Probability.
Inspect temperature as one of the forecast signals behind Fog Probability.
Inspect dew point as one of the forecast signals behind Fog Probability.
Inspect relative humidity as one of the forecast signals behind Fog Probability.
Inspect vapor pressure deficit as one of the forecast signals behind Fog Probability.
Fog Probability tells you when to set your alarm for a foggy sunrise shoot. Fog creates some of the most compelling photography—soft diffused light, simplified compositions, mysterious depth, and light beams cutting through the mist. But chasing fog means early mornings and long drives, so you need a forecast you can trust.
The score combines humidity, dewpoint, temperature, wind, and time of day to predict when fog will form. Calm conditions with moisture-saturated air score highest, especially during the prime fog window from late night through dawn—exactly when radiation fog is most likely to appear. Clear overnight skies boost the score further, since the ground cools faster and fog forms more readily.
Whether you're planning a misty lake sunrise, waiting for fog to roll through a valley, or hoping for light beams in a forest, this is the number to watch. Set your threshold around 70-80% for notifications. Scores above 80% mean conditions are strongly lined up—grab your camera.
In PhotoWeather, Fog Probability is shown from 0.0% to 100.0%. Use the guide above to choose a narrower range for your subject, season, and location.
Fog Probability combines forecast signals such as Visibility, Temperature, Dew Point, Relative Humidity, Vapor Pressure Deficit into one photography planning cue. Use it as a shortlist, then check the individual fields before committing to a shoot.
Combines aurora activity with viewing conditions (darkness, cloud cover, visibility) to provide photography-ready aurora quality scores. Aurora activity is OVATION-aware from the compute step.
Evaluates atmospheric conditions for blue hour photography quality. Scores sky clarity, cloud type suitability (high thin clouds ideal), visibility, and calm conditions.
Predicts the chance of vivid red, orange, and pink sunrise or sunset color. Best when the sun has a clear opening near the horizon, some clouds are ready to catch the light, and low clouds are not blocking the show.
Atmospheric suitability for golden hour photography across extended time window around golden hour periods
Cloud formation suitability for colorful sunrise and sunset skies around golden hour
Analysis of cloud formations and atmospheric conditions for dramatic sky photography
Storm intensity analysis combining precipitation, wind conditions, atmospheric pressure, visibility, GFS simulated radar reflectivity, and wind shear for enhanced storm organization detection.
Frost formation probability combining temperature, dewpoint spread, cloud cover, and wind analysis
Dew formation probability combining overnight radiative cooling, surface temperature, moisture, and wind analysis
Probability of visible rainbow formation based on solar geometry and precipitation patterns
Analysis of coastal drama combining wave dynamics, wind-driven spray and atmospheric cloud structure for seascape photography.
Comprehensive atmospheric clarity analysis for landscape and astrophotography using CAMS aerosol optical depth, particle composition (dust, smoke, sea salt), particle size distribution (Ångström exponent), and visibility conditions.
Scores forecast sky quality for deep-sky, starscape, and nightscape photography using darkness, moon interference, clouds, atmospheric transparency, precipitation risk, and forecast confidence. This is not a Bortle class or site-darkness/light-pollution rating.
Scores Milky Way core / Galactic Center shootability using Galactic Center altitude plus dark, clear, transparent, moon-friendly forecast sky conditions. This is not a generic Milky Way band detector or site-darkness rating.
Likelihood of sun breaking through clouds creating dramatic rays and dappled light patterns. Best with partial cloud cover (40-70%) and some sunshine reaching the surface.
Quality of diffused light for portrait and product photography. High scores indicate soft, even lighting that minimizes harsh shadows - the 'giant softbox' effect.
Rates how visually interesting the clouds are - distinguishing dramatic formations from boring flat overcast. High scores indicate structured clouds with good light transmission.
How flat and boring the overcast is. HIGH scores indicate uniform gray sky with no breaks or texture - generally unfavorable for most photography. LOW scores indicate breaks, texture, or clearing.
Temperature difference between air temperature and dew point
Horizontal visibility distance
Moisture content relative to saturation
Wind speed at 10 meters above ground
Use Fog Probability with related photography weather fields to get alerts for your locations, subjects, and shooting windows.
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