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Allergies & Pollen

Pollen Forecast for Portola, California

4.9
Medium
Ash, Mulberry and Sycamore
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Today
The quantity of pollen grains in the air for Sunday will be falling in the moderate range. This relief in pollen levels is caused in part by rising humidity, weakening winds and expected precipitation in the morning, afternoon and evening which tends to wash pollen out of the air. Relief is in sight.
Outlook
Pollen concentrations for Monday will be rising in the high range. This rise is a result of strong winds and decreasing humidity. This heavy increase in pollen concentration could very well cause problems for those who are allergic to airborne pollens.