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Poweshiek County rainfall tops normal for October
October 22, 2026
Poweshiek County recorded 2.6 in of precipitation through October 22, 0.9 in above the normal 1.74 in by this date. October is tracking toward above-normal rainfall for the month.
Grinnell logs a warm stretch into late October
October 22, 2026
Grinnell 3 SW weather station 3 km away recorded a mean daily high of 71°F, 4.3°F above normal, and mean daily low of 48.9°F, 8.5°F above normal over the past 30 days. Above-normal temperatures persist well into late October, extending the warm autumn pattern.
Silphium borer moth found near Grinnell
October 22, 2026
A (Papaipema silphii) was recorded on 2026-10-03 in Grinnell during its adult flight period. This threatened prairie specialist depends on Silphium plant roots for larval development and occurs in fragmented mesic prairie habitat. The observation indicates functional prairie habitat remains in the area where this rare Midwestern moth can persist.
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