Chest Congestion in the Fall: Causes Treatments Although a cold and its accompanying chest congestion can occur at any time of the year, the generally accepted start of the “cold season” in the northern hemisphere arrives in September. The start of cooler seasonal temperatures by itself, however, does not necessarily produce more colds and chest congestion. You can generally blame congestion and its associated symptoms on viruses or seasonal allergies. Rather than determining the cause, your greater interest may concern finding […]