Pollen Alerts For Chevy Chase, MD

Pollen Index: 9.7 Pollen Level: high Predominant Pollen: Ragweed, Nettle and Grass. The amount of pollen in the air for Thursday will be falling but will remain in the high range. This relief in pollen levels is caused in part by rising humidity, weak winds and expected precipitation in the morning and evening which tends to wash pollen out of the air.