The PRISM Group has created a series of grids showing temperature and precipitation datasets for the continental United States. Datasets include average maximum and minimun temperatures, precipitation, and average dewpoint. The collection - available both in image and grid format - provides 12 monthly averages for the period 1971 to 2000 but also provides individual monthly averages for 2000 to 2006. The latter is updated monthly. Indivudual monthly data sets are also available back to 1895 in an Arc/Info ascii grid format.

Data is free to download but may only be used for noncommercial purposes.

By way of Geotechnologies in Education