Developed by Dr. Peter E Thornton to fulfill the need for daily climatological data necessary for plant growth model inputs, Daymet generates daily, gridded surfaces of temperature, precipitation, humidity, and radiation over large regions and takes into account areas of complex terrain.
A list of suggested citations is at:
National Center for Atmospheric Research Staff (Eds). Last modified 23 Sep 2014. "The Climate Data Guide: Daymet: Daily Surface Weather and Climatological Summaries." Retrieved from https://climatedataguide.ucar.edu/climate-data/daymet-daily-surface-weather-and-climatological-summaries.