Pollen Alerts For Lewiston, ID

Pollen Index: 8.4 Pollen Level: medium-high Predominant Pollen: Cedar/Juniper, Poplar/Aspen/Cottonwood and Alder. The quantity of pollen grains in the air for Thursday will be falling in the moderate range. The cause for the falling pollen levels is falling temperatures and heavy rains in the morning and evening which tend to wash pollen out of the air. Relief is in sight.