worst time of year for mold 2

https://wiki-fusion.win/index.php/When_Is_Mold_Season_in_St._Louis%3F_A_Homeowner%E2%80%99s_Guide_to_Peak_Spore_Activity

Late summer and early fall are the worst for mold because the humidity is high and the air gets musty, especially after rain. If you live in a damp climate or have a basement that floods, those warm, wet weeks can make your house smell like a cellar and trigger allergies like crazy. It's a real struggle to keep the windows open without letting more moisture in.