The Infectious risk has shown an upward trend over the last 12 weeks, with the most recent week notably higher than earlier in the window..
Allergy risk activity has remained stable over the past 12 weeks in Day, South Dakota.
No Pollution activity has been reported over the past 12 weeks in Day, South Dakota.
Weather risk activity has been trending downward over the past 12 weeks in Day, South Dakota.
Last updated: August 24, 2026
Data refreshed weekly