01/25/2026
WHY ANXIETY CAN SPIKE IN WINTER
Anxiety often spikes during the cold, dark months, and it’s not “all in your head.” Shorter days mean less sunlight, which can disrupt serotonin and melatonin—chemicals that regulate mood and sleep. When sleep is off, anxiety tends to rise. Cold weather also keeps people indoors more, reducing movement and social interaction, both of which help calm the nervous system.
Winter can shrink our routines. Walks, errands, and casual social contact decrease, leaving more time alone with our thoughts. For people prone to anxiety, this extra mental space can quickly turn into rumination and worry. There’s also a subtle psychological effect of darkness itself: long nights can make problems feel heavier and more permanent.
Add holiday pressure, financial stress, health concerns, and weather-related fears, and the nervous system stays on high alert. Understanding these seasonal triggers matters. When we recognize that winter anxiety has real biological and environmental roots, we can respond with compassion, not self-blame—and take steps to support our mental health through the season.