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