Are ticks active in winter? Yes! When temperatures are above freezing, black legged ticks (deer ticks) are active. These ticks will find shelter in leaf litter to survive winter.
Their activity will decrease when temperatures dip below freezing but they are still out there! As long as they aren't covered in snow, they are looking for hosts.
“There’s a really good correlation with our increase in temperatures in the winter months and the increase in survival [for ticks],” explained Kirby Stafford, chief scientist at the Connecticut Agricultural Experiment Station and state entomologist.