The Infectious risk has eased over the past 12 weeks, ending the period well below its earlier peak..
Allergy risk activity has stayed relatively flat over the past 12 weeks in Billings, North Dakota.
Pollution risk activity has been trending upward over the past 12 weeks in Billings, North Dakota.
Weather risk activity has remained stable over the past 12 weeks in Billings, North Dakota.
Last updated: August 31, 2026
Data refreshed weekly