Weather Alerts For Berthoud, CO

Pollen Index: 10.4 Pollen Level: high Predominant Pollen: Ragweed, Chenopods and Sagebrush/Sage. The quantity of pollen grains in the air for Tuesday will be falling but will remain in the high range. The cause for the falling pollen levels is falling temperatures, rising humidity, and expected precipitation in the morning and evening which tends to wash pollen out of the air.