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 Custer, South Dakota.
Pollution risk activity has been trending upward over the past 12 weeks in Custer, South Dakota.
Weather risk activity has been increasing over the past 12 weeks in Custer, South Dakota.
Last updated: August 31, 2026
Data refreshed weekly