average wettest month is July which corresponds with the annual peak in thunderstorm activity. Since 1981, the wettest calendar day was 6.46 inches (164 mm) on 08/27/2011. During the winter months, the plant hardiness zone is 7a with an average annual extreme minimum air temperature of . Since 1981, the coldest air temperature was on 01/22/1984. Episodes of extreme cold and wind can occur with wind chill values < . The average annual snowfall (Nov-Apr) is between 24 and 30 inches (61 and 76 cm). Ice storms and large snowstorms depositing ≥ 12 inches (30 cm) occur once every few years, particularly during nor’easters from December through February. Ecology According to the A. W. Kuchler U.S. potential natural vegetation types, Tyler State Park would have dominant vegetation type of Appalachian Oak (104) with a dominant vegetation form of Eastern Hardwood Forest (25). The forested areas have been impacted by invasive insects like the emerald ash beetle and the spotted lanternfly. The management directive for Tyler State Park includes allowing for some of the land to be leased as farmland; however, there are also acers set aside as maintained pollinator meadows and warm season grasslands, which are mowed once per year. Some of the meadows are maintained and researched by the Bucks County Community College STEM department. Neshaminy Creek watershed The Neshaminy Creek flows through the middle of Tyler State Park and connects to the Delaware River a few miles downstream near Neshaminy State Park. Neshaminy Creek is home to many warm water species including bluegill, black crappie, carp, smallmouth bass, and various other panfishes. The creek and associated waters also offers habitat for Eastern Water Snakes, box turtles, and many amphibians. Neshaminy Creek provides excellent catch-and-release fishing opportunities. Anglers may fish along the banks or from a canoe or kayak. Pennsylvania Fish and Boat Commission regulations and laws apply. Tyler State Park does not allow visitors to swim in Neshaminy Creek, as per DCNR rules and regulations. However, activities such as fishing and kayaking are permitted. Pollution Concerns The Neshaminy Creek basin in Bucks and Montgomery counties has tested as "extremely high" for levels of Perfluorooctane Sulfonate (PFOS). For this reason the Pennsylvania Department of Agriculture (PDA), Department of Environmental Protection (DEP), and Department of Health (DOH), along with the Pennsylvania Fish and Boat Commission (PAFB), announced a “DO NOT EAT” advisory for all fish species caught in the Neshaminy