San Francisco, CA

Ongoing: Beach Hazards - Statement

Current weather

9:28 PM

Clear

Clear

The skies will be clear. The low will be 57°.

Good air quality (0-50)
Primary pollutant PM2.5 9.0 μg/m³

Light air (1 - 3 mph)

Direction shown by smoke drift but not by wind vanes.

Amount of moisture present in the air relative to the maximum amount of moisture the air can contain at its current temperature.

Good visibility (5 - 10 mi)

Pressure is the weight of the air in the atmosphere. It is normalized to the standard atmospheric pressure of 1,013.25 mb (29.9212 inHg). Higher pressure is usually associated with sunny weather, lower pressure with stormy weather.

The temperature to which the air needs to be cooled for moisture to condense, for example, as dew. The higher the dew point, the more "muggy" it feels.