Pollen Alerts For Saint Louis, MO

Pollen Index: 9.7 Pollen Level: high Predominant Pollen: Oak, Ash and Mulberry. Based on past pollen counts and expected weather conditions, pollen levels for Friday will be falling but will remain in the high range. Since the weather has a major influence on pollen dispersal, this decrease is due in part to falling temperatures, lack of strong winds and expected precipitation in the morning and evening which tends to wash pollen out of the air.