Pollen Forecast for Napa, California

Concentration of pollen grains in the air for Sunday will be increasing but will still remain in the low range. Since the weather has a major influence on pollen dispersal, this increase is due in part to rising temperatures, strong winds and lower relative humidity. Tomorrow's increase could spell trouble for allergy sufferers.

The quantity of pollen grains in the air for Monday will be greater than today's levels in the moderate range. Since the weather has a major influence on pollen dispersal, this increase is due in part to strong winds and decreasing humidity. If you have these allergies, tomorrow will likely be more difficult outdoors.