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St. LouisSt. Louis Public Radio · Oct 2, 2026

St. Louis logs longest 90-degree season on record

191 days from first 90° day (March 22) to the last; September warmest on record.

St. Louis Public Radio reports the metro broke the record for longest stretch between 90-degree days: first 90° on March 22, last midweek — 191 days, topping a 1950 mark.

NWS St. Louis said September was the warmest on record at 78.4° average.

Source: STLPR

Paraphrased for the Oct 3, 2026 digest. Read the original at the source link. Not affiliated with the newsroom.