This dataset is made up of raw temperature data collected at various sites in Alaska and for various studies from 1995 through 2001. Many of the data sets were collected along the Dalton Highway from Prudhoe Bay to Fairbanks or in other sites like Council and Barrow to characterize overwinter soil surface temperatures as part of our winter CO2 flux measurements. Other measurements were taken at Toolik Lake in experimental climate change plots (e.g., increased winter snow accumulation, elevated summer temperature plots, increased litter plots). All the data were collected using HOBO dataloggers. Unless otherwise indicated, air temperatures were collected at 1.6 m and soil temperatures were collected at 1cm below the soil surface. Measurements made at other soil depths or snow depths are indicated. All data is given in degrees C. A more complete description of each data set is provided in the readme.