The Infectious risk has shown little change over the last 12 weeks, with the most recent week close to the 12-week average..
Allergy risk activity has been increasing over the past 12 weeks in Billings, North Dakota.
Pollution risk activity has been climbing over the past 12 weeks in Billings, North Dakota.
Weather risk activity has been decreasing over the past 12 weeks in Billings, North Dakota.
Last updated: July 13, 2026
Data refreshed weekly