The Infectious risk has steadily declined over the last 12 weeks, with the most recent week notably lower than earlier in the window..
Allergy risk activity has been trending upward 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 stayed relatively flat over the past 12 weeks in Lyman, South Dakota.
Last updated: July 6, 2026
Data refreshed weekly