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U.S. Monthly Gridded Precipitation and Temperature Climate Normals for 1991-2020 (NCEI Accession 0245564)

Published by NOAA National Centers for Environmental Information | National Oceanic and Atmospheric Administration, Department of Commerce | Catalog Last Checked: August 03, 2026 at 04:01 AM | Dataset Last Updated: June 23, 2022 at 12:00 AM
A 1/24 degree by 1/24 degree (~5 km) gridded data set consisting of monthly precipitation and temperature values for the conterminous U.S. was published as part of generating new division climate normals. The underlying data set is nClimGrid, and this is based on a set of station anomalies observed in any given month interpolated spatially using climate guidance and reconstructed into whole values. The resulting monthly grids are the equivalent of homogenous temperature and serially complete precipitation records. Therefore, a simple 30-year average of monthly grids from 1991-2020 yields directly a set of gridded climate normals. Monthly gridded climate normals are calculated for total precipitation, and maximum, minimum and average temperature.

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