Pollen Alerts For Port Huron, MI

Pollen Index: 9.5 Pollen Level: medium-high Predominant Pollen: Birch, Maple and Poplar/Aspen/Cottonwood. Pollen concentrations for Saturday will be on the increase and extend further into the very high range. This rise is a result of seasonally normal weather conditions which are favorable for the production and dispersal of pollen.