Pollen Alerts For Holmesburg, PA

Pollen Index: 8.7 Pollen Level: medium-high Predominant Pollen: Oak, Birch and Maple. Pollen concentrations for Thursday will be falling but will remain in the high range. This forecast of lower pollen concentration is based on rising humidity, relatively calmer winds and expected precipitation in the morning, afternoon and evening which tends to wash pollen out of the air.