This data set consists of air and soil temperatures from various sites in Alaska between 1995 and 2001. Data loggers recorded soil temperatures at 1 cm below the ground or snow surface, and air temperatures at 1.6 m above the surface. Temperatures are given in degrees Celcius. Data collection sites around the state include: Toolik Lake, Galbraith, Happy Valley, Prudhoe Bay, Council, Livengood, Yukon River, Barrow, Gold Creek, Kanuti River, Fairbanks, Chandalar, and Graylink Lake. The data consist of 53 space-delimited ASCII text files, and are available via ftp. Each data file contains date, time, and temperature columns, and some files contain additional data. A table in the documentation for this data set lists each data file and its contents. The research project was funded by the Arctic System Sciences (ARCSS) Program, grant number OPP-9321730.