Pollen Forecast for Yosemite National Park, California

The quantity of pollen grains in the air for Thursday will be falling into the very low range. The cause for the falling pollen levels is falling temperatures, rising humidity and heavy rains in the morning and evening which tend to wash pollen out of the air.

The pollen levels for Friday will be greater than today's levels in the moderate range. This results in part from drier air. If you have these allergies, tomorrow will likely be more difficult outdoors.