Pollen Alerts For North Walpole, NH

Pollen Index: 8.4 Pollen Level: medium-high Predominant Pollen: Ragweed and Grass. Concentration of pollen grains in the air for Thursday will be falling in the moderate range. This relief in pollen levels is caused in part by rising humidity, weak winds and expected precipitation in the evening which tends to wash pollen out of the air.