Pollen Forecast for Johnston, South Carolina

Based on past pollen counts and expected weather conditions, pollen levels for Saturday will be falling into the extremely low range. This lowering of pollen concentrations is a result of rising humidity, weak winds and expected precipitation in the morning, afternoon and evening which tends to wash pollen out of the air.

Concentration of pollen grains in the air for Sunday will be greater than today's levels but will stay in the very low range. This rise is a result of rising temperatures, strong winds and lower relative humidity.