The Infectious risk has eased over the past 12 weeks, ending the period well below its earlier peak..
Allergy risk activity has been trending downward over the past 12 weeks in Lewis and Clark, Montana.
Pollution risk activity has been trending upward over the past 12 weeks in Lewis and Clark, Montana.
Weather risk activity has held steady over the past 12 weeks in Lewis and Clark, Montana.
Last updated: August 31, 2026
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