Daymet provides estimates of daily weather parameters in North America on a one-kilometer grid, based on meteorological observations. The motivation for Daymet is to provide measurements of near-surface meteorological conditions where no instrumentation exists.
This dataset provides Daymet Version 3 data for North America; the island areas of Hawaii and Puerto Rico are available as files separate from the continental land mass. Daymet output variables include minimum temperature, maximum temperature, precipitation, shortwave radiation, vapor pressure, snow water equivalent, and day length. The dataset covers the period from January 1, 1980 to the present. Each year is processed individually at the close of a calendar year. Daymet variables are continuous surfaces provided as individual files, by variable and year, at e-kilometer spatial resolution and daily temporal resolution. Data are in a Lambert Conformal Conic projection for North America and are distributed in netCDF format compliant with Climate and Forecast (CF) metadata conventions (version 1.6).
Data are stored in blobs (one blob per image) in the East US data center, in the following blob container:
Within that container, data are named as:
- year is a four-digit year
- region is a region code, one of “na” (North American continental mass), “hawaii”, or “puertorico”
For example, data from 1982 for the continental mass is available at:
We also provide a read-only SAS (shared access signature) token to allow access to Daymet data via, e.g., BlobFuse, which allows you to mount blob containers as drives:
Mounting instructions for Linux are here.
Large-scale processing using this dataset is best performed in the East US Azure data center, where the data is stored. If you are using Daymet data for environmental science applications, consider applying for an AI for Earth grant to support your compute requirements.
If you use this data in a publication, please cite:
Thornton, P.E., M.M. Thornton, B.W. Mayer, Y. Wei, R. Devarakonda, R.S. Vose, and R.B. Cook. 2016. Daymet: Daily Surface Weather Data on a 1-km Grid for North America, Version 3. ORNL DAAC, Oak Ridge, Tennessee, USA.
See the Oak Ridge National Laboratory Distributed Active Archive Center (ORNL DAAC)’s Data Citations and Acknowledgments policy for more information.
The following resources and references may be helpful when working with the Daymet dataset:
MICROSOFT PROVIDES AZURE OPEN DATASETS ON AN “AS IS” BASIS. MICROSOFT MAKES NO WARRANTIES, EXPRESS OR IMPLIED, GUARANTEES OR CONDITIONS WITH RESPECT TO YOUR USE OF THE DATASETS. TO THE EXTENT PERMITTED UNDER YOUR LOCAL LAW, MICROSOFT DISCLAIMS ALL LIABILITY FOR ANY DAMAGES OR LOSSES, INCLUDING DIRECT, CONSEQUENTIAL, SPECIAL, INDIRECT, INCIDENTAL OR PUNITIVE, RESULTING FROM YOUR USE OF THE DATASETS.
This dataset is provided under the original terms that Microsoft received source data. The dataset may include data sourced from Microsoft.
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