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 increasing over the past 12 weeks in Lyman, South Dakota.
No Pollution activity has been reported over the past 12 weeks in Lyman, South Dakota.
Weather risk activity has been easing over the past 12 weeks in Lyman, South Dakota.
Last updated: August 24, 2026
Data refreshed weekly