Seasonal depression is skyrocketing right now for millions of people in the USA, and the new data for 2025 confirms that symptoms peak during the third week of November and are still present in most cases until mid, December. Thriveworks’ analysis of Google Trends and weather patterns reveals that the seasonal depression, related searches are 125% higher in the last week of September than in the middle of August as shortening days and temperature drops take place. In the late fall, peoples interest in the matter is so high that it reflects the spike of real, life incidents of seasonal depression that are characterized by tiredness, low mood, appetite changes, and lack of motivation.
Researches are very clear that seasonal depression is very selective when it comes to different regions in the US, hitting some areas much harder than others. The Mountain West and Northeast cities such as Idaho Falls, Salt Lake City, Missoula, Syracuse, and Binghamton that experience the most sudden and steep declines in daylight hours and an average temperature drop of 27.95 (between September and December) show the most significant search interest for seasonal depression. These sudden changes in the environment seem to trigger seasonal depression as they interfere with the body’s internal clock and serotonin levels.
Health Care Practitioners put it this way that understanding the time when seasonal depression peaks enables people to plan and not be taken by surprise. Besides going through therapy sessions on times when symptoms are about to get worse, they also advise people to expose themselves more to outdoor daylight, keep physically fit, and if they cant help it, use light therapy boxes as a well, researched method to treat seasonal depression.
Source: Thriveworks – Seasonal Depression Peaks Third Week of November 2025
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