The Infectious risk has eased over the past 12 weeks, ending the period well below its earlier peak..
Allergy risk activity has been increasing over the past 12 weeks in Fergus, Montana.
Pollution risk activity has been climbing over the past 12 weeks in Fergus, Montana.
Weather risk activity has been trending upward over the past 12 weeks in Fergus, Montana.
Last updated: August 31, 2026
Data refreshed weekly