The Infectious risk has risen noticeably over the last 12 weeks, reaching a notably higher level in the most recent week compared to prior weeks..
Allergy risk activity has been trending upward 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 24, 2026
Data refreshed weekly