NOAA nClimGrid-Daily Version 1 – Daily gridded temperature and precipitation for the Contiguous United States since 1951

The product referred to as nClimGrid-Daily is a set of daily gridded fields and area averages of temperature and precipitation that covers the Contiguous United States (CONUS) from 1951 to present and is updated daily. It is related to the monthly version of NClimGrid and NClimDiv, but with a daily temporal resolution. The gridded fields are stored in netCDF format with one file per data month. Area averages for nine types of regions are provided in CSV format with one file per region type and data month. At a resolution of approximately 0.0417 degrees latitude and longitude (nominally 5-km grid), the gridded data provide smoothed representations of the point observations. Since the accuracy of estimates for individual grid points and days can be sensitive to local spatial variability and the ability of the available observations and interpolation technique to capture that variability, the nClimGrid-Daily dataset is recommended for applications that require the aggregation of estimates in space and/or time, such as climate monitoring analyses at regional to national scales.