Mean annual temperature ranges from 45 degrees to 54 degrees F., mean annual precipitation ranges from 40 to 50 inches, and the growing season ranges from 120 to 180 days. These are the the Agawam , Hadley , Haven , Hinckley , Lim , Limerick , Merrimac , Occum , Pootatuck , Rippowam , Saco , Windsor , and Winooski soils on nearby landscapes. The well drained Occum, moderately well drained Pootatuck, and poorly drained Rippowam soils are associated in a drainage sequence. Other floodplain associates include the Hadley, Winooski, Lim, Limerick, and Saco soils, all of which have higher silt content. Agawam, Haven, Hinckley, and Merrimac soils are on nearby outwash terraces and are underlain by stratified sand and gravel.
Surface runoff is slow.
Permeability is rapid or very rapid throughout. Flooding varies from once a year to once in ten years, but typically does not occur in the growing season. Most areas are wooded or in brushy unimproved pasture. Cleared areas are in hay or pasture, but a few scattered areas are in cultivated crops. Common trees are sycamore, aspen, white and black oak, red maple, white pine, and ironwood.