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 McPherson, South Dakota.
Pollution risk activity has been climbing over the past 12 weeks in McPherson, South Dakota.
Weather risk activity has been decreasing over the past 12 weeks in McPherson, South Dakota.
Last updated: August 31, 2026
Data refreshed weekly