2. California
California has one of the most diverse spider populations in the United States due to its wide range of climates, from deserts to coastal forests and mountain regions. This environmental variety allows many species to thrive in different habitats across the state. Common spiders include wolf spiders, jumping spiders, cellar spiders, and orb-weavers, which are frequently found in gardens, homes, and natural landscapes. California is also known for seasonal sightings of tarantulas, especially during mating periods in rural and desert areas. In terms of medically significant species, the state has western black widows and several recluse spiders, including the desert recluse and Chilean recluse in limited regions. These spiders are usually hidden in quiet, undisturbed places like storage areas and basements. The combination of mild winters and long growing seasons for insects ensures a steady food supply, making California one of the most spider-active states in the country throughout the year.
