The Infectious risk has shown a gradual increase over the past 12 weeks, with the most recent week notably higher than earlier in the window..
Allergy risk activity has been easing over the past 12 weeks in Custer, South Dakota.
Pollution risk activity has been increasing 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 24, 2026
Data refreshed weekly