The Infectious risk has fallen noticeably over the last 12 weeks, bringing current levels down from earlier weeks..
Allergy risk activity has held steady over the past 12 weeks in Chelan, Washington.
Pollution risk activity has been climbing over the past 12 weeks in Chelan, Washington.
Weather risk activity has been increasing over the past 12 weeks in Chelan, Washington.
Last updated: August 24, 2026
Data refreshed weekly