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Description

This dataset provides Daymet Version 4 R1 data as gridded estimates of daily weather parameters for North America, Hawaii, and Puerto Rico. Daymet variables include the following parameters: 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 December 31 (or December 30 in leap years) of the most recent full calendar year for the Continental North America and Hawaii spatial regions. Data for Puerto Rico is available starting in 1950. Each subsequent year is processed individually at the close of a calendar year. Daymet variables are provided as individual files, by variable and year, at a 1 km x 1 km spatial resolution and a daily temporal resolution. Areas of Hawaii and Puerto Rico are available as files separate from the continental North America. Data are in a North America Lambert Conformal Conic projection and are distributed in a standardized Climate and Forecast (CF)-compliant netCDF file format. In Version 4 R1, all 2020 and 2021 files were updated to improve predictions especially in high-latitude areas. It was found that input files used for deriving 2020 and 2021 data had, for a significant portion of Canadian weather stations, missing daily variable readings for the month of January. NCEI has corrected issues with the Environment Canada ingest feed which led to the missing readings. The revised 2020 and 2021 Daymet V4 R1 files were derived with new GHCNd inputs. Files outside of 2020 and 2021 have not changed from the previous V4 release.

Product Summary

Platforms
MODELS
Instruments
Computer
Spatial Extent

N: 82.9143 S: 14.0749 E: -53.0567 W: -178.133

Location
NORTH AMERICA ,
PUERTO RICO
Coordinate System
CARTESIAN
Granule Spatial Representation
CARTESIAN
Temporal Extent
1950-01-01 to 2025-12-31
Data Partner
THE OAK RIDGE NATIONAL LABORATORY (ORNL) DISTRIBUTED ACTIVE ARCHIVE CENTER (DAAC) (ORNL_DAAC)
Concept ID
C2532426483-ORNL_CLOUD
Data State
COMPLETE
Number of Files/Granules
1176
Processing Level
4
Published
Updated
Science Keywords
Maximum/Minimum Temperature ,
24 Hour Precipitation Amount ,
Maximum/Minimum Temperature ,
Snow Water Equivalent ,
Vapor Pressure ,
Shortwave Radiation

Citation

Citation is critically important for dataset documentation and discovery. This dataset is openly shared, without restriction, in accordance with the EOSDIS Data Use and Citation Guidance.

Copy Citation

Thornton, M. M., Shrestha, R., Wei, Y., Thornton, P. E., & Kao, S.-C. (2022). Daymet: Daily Surface Weather Data on a 1-km Grid for North America, Version 4 R1 (Version 4.1). ORNL Distributed Active Archive Center. https://doi.org/10.3334/ORNLDAAC/2129 Date Accessed: 2026-06-01

Documents

Publications Citing This Dataset

Filters
Title Year Author Topic
Cities as hotspots of compound heat and fine particulate matter Leffel, Jessica, Wang, Chenghao, Hu, Xiao-Ming, Feron, Sarah, Henry, Sarah Maximum/Minimum Temperature, 24 Hour Precipitation Amount, Snow Water Equivalent, Shortwave Radiation, Vapor Pressure
Cereal rye biomass effects on giant ragweed suppression inform management decisions Chudzik, Guilherme, Nunes, Jose J., Arneson, Nicholas J., Stoltenberg, David E., Werle, Rodrigo Maximum/Minimum Temperature, 24 Hour Precipitation Amount, Snow Water Equivalent, Shortwave Radiation, Vapor Pressure
Estimating Daily Suspended Sediment Flux From Multiple Data Sources Using Deep Learning Langhorst, Theodore, Andreadis, Konstantinos M., He, Xinchen, Friedmann, Elisa, Gardner, John, Pavelsky, Tamlin Maximum/Minimum Temperature, 24 Hour Precipitation Amount, Snow Water Equivalent, Shortwave Radiation, Vapor Pressure
Estimating indicators of cyanobacterial harmful algal blooms in New York State Savoy, Philip, Gorney, Rebecca M., Graham, Jennifer L. Maximum/Minimum Temperature, 24 Hour Precipitation Amount, Snow Water Equivalent, Shortwave Radiation, Vapor Pressure
Movements and habitat use of the Rocky Mountain Population of trumpeter swans Poessel, Sharon A., Sanders, Todd A., Long, William, Kristof, Andrea, Reishus, Brandon, Proett, Matt, Gower, Claire, Ibrahim, Nicole, Katzner, Todd E. Maximum/Minimum Temperature, 24 Hour Precipitation Amount, Snow Water Equivalent, Shortwave Radiation, Vapor Pressure
Modeling Wildfire Effects on Ecosystem Services in two Disparate California Watersheds and Communities Busari, Ibrahim, Sloggy, Matthew R., Rouhi Rad, Mani, Sahoo, Debabrata, Drury, Stacy A., Escobedo, Francisco J. Maximum/Minimum Temperature, 24 Hour Precipitation Amount, Snow Water Equivalent, Shortwave Radiation, Vapor Pressure
Nitrogen fertilizer rate not timing determines no-till corn yield following cereal rye cover crop in northeastern United States Huddell, Alexandra M., Davis, Brian, Richards, Nate, Tully, Kate, Thapa, Resham, Hashemi, Masoud, VanGessel, Mark, Miller, Jarrod, Ketterings, Quirine M., White, Charles, Roth, Greg, Spargo, John T., Mirsky, Steven B. Maximum/Minimum Temperature, 24 Hour Precipitation Amount, Snow Water Equivalent, Shortwave Radiation, Vapor Pressure
Nonlinear behavior of urban flood peaks in the U.S. Mid-Atlantic region Hua, Ge, Li, Hongyi, Leung, L. Ruby Maximum/Minimum Temperature, 24 Hour Precipitation Amount, Snow Water Equivalent, Shortwave Radiation, Vapor Pressure
Microscale temperatures affect the incidence and implications of predator-avoidance behavior in monarch caterpillars Singh, Prabhjot, Yang, Louie H. Maximum/Minimum Temperature, 24 Hour Precipitation Amount, Snow Water Equivalent, Shortwave Radiation, Vapor Pressure
Mapping Floral Resources in Montane Landscapes Using Unmanned Aerial Systems and Two-step Random Forest Classifications Tabor, Jesse, Hernandez, Alexander, Cox-Foster, Diana, Love, Byron G., McCabe, Lindsie M., Robbins, Matthew, Koch, Jonathan B.U. Maximum/Minimum Temperature, 24 Hour Precipitation Amount, Snow Water Equivalent, Shortwave Radiation, Vapor Pressure
Major changes in climate, vegetation, and ecological resilience in recent decades suggest climate smart management strategies for western US dryland shrublands and woodlands Chambers, Jeanne C., Brown, Jessi L., Koutzoukis, Sofia, Miller, Richard F., Barga, Sarah, Boswell, Rhett, Heckman, Robert W., Madsen, Mark, Reeves, Matthew C., Thacker, Vaughn, Yelenik, Stephanie G. Maximum/Minimum Temperature, 24 Hour Precipitation Amount, Snow Water Equivalent, Shortwave Radiation, Vapor Pressure
Management and natural regeneration in multiple ponderosa pine forests of the southwestern United States Petrie, Matthew D., Hubbard, Robert M., Bradford, John B., Kolb, Tom E., Noel, Adam, Schlaepfer, Daniel R., Bowen, Marisa A., Fuller, Lloyd R., Moser, W. Keith Maximum/Minimum Temperature, 24 Hour Precipitation Amount, Snow Water Equivalent, Shortwave Radiation, Vapor Pressure
Management practices and soil health: Insights from dairy farms in the United States Hsiao, Che-Jen, Cloutier, Mara, Liptzin, Daniel, Looker, Nathaniel, Molling, Christine, Cope, Michael, Jackson, Randall D., Sanford, Gregg R., Ruark, Matthew D., Busch, Dennis, Czymmek, Karl, Ketterings, Quirine M., Afshar, Reza, Bell, Jourdan, Hagevoort, Robert, Morgan, Cristine Maximum/Minimum Temperature, 24 Hour Precipitation Amount, Snow Water Equivalent, Shortwave Radiation, Vapor Pressure
Mapping range-wide budburst gradients in 22 temperate tree species across the eastern U.S. using quantile regression Liang, Liang RADAR IMAGERY, Terrain Elevation, Topographical Relief Maps, Digital Elevation/Terrain Model (DEM), Maximum/Minimum Temperature, 24 Hour Precipitation Amount, Snow Water Equivalent, Shortwave Radiation, Vapor Pressure
On-farm progress toward soil health potential in Southern US row crops Looker, Nathaniel, Morgan, Cristine L.S., Boniface, Helen, Bagnall, Dianna K. Maximum/Minimum Temperature, 24 Hour Precipitation Amount, Snow Water Equivalent, Shortwave Radiation, Vapor Pressure
A Terrestrial Thermometer Using Carbonate Clumped Isotopes From Gar Scales Gray, Katelyn E., Brandon, Mark T. Maximum/Minimum Temperature, 24 Hour Precipitation Amount, Snow Water Equivalent, Shortwave Radiation, Vapor Pressure
A high resolution, gridded product for vapor pressure deficit using Daymet Corak, Nicholas K., Thornton, Peter E., Lowman, Lauren E. L. Land Use/Land Cover Classification, Maximum/Minimum Temperature, 24 Hour Precipitation Amount, Snow Water Equivalent, Shortwave Radiation, Vapor Pressure, Surface Pressure, Longwave Radiation, Surface Temperature, Evaporation, Humidity, Convection, Surface Winds, Rain, Land Surface Temperature
From Rivers to Floodplains: Leveraging Transfer Learning to Predict Floodplain Dissolved Oxygen Myers, George H., Underwood, Kristen L., Diehl, Rebecca M., Rizzo, Donna M., Chin, Tiffany L., Roy, Eric D. Maximum/Minimum Temperature, 24 Hour Precipitation Amount, Snow Water Equivalent, Shortwave Radiation, Vapor Pressure
Fungal Spore Seasons Advanced Across the US Over Two Decades of Climate Change Wu, Ruoyu, Song, Yiluan, Head, Jennifer R., Katz, Daniel S. W., Peay, Kabir G., Shedden, Kerby, Zhu, Kai Maximum/Minimum Temperature, 24 Hour Precipitation Amount, Snow Water Equivalent, Shortwave Radiation, Vapor Pressure
Evapotranspiration Partitioning Across US Ecoregions: A MultiSite Study Using Field StableIsotope Observations Matos, Katarena A., Bowen, Gabriel J., Good, Stephen P., Allen, Scott T. Leaf Characteristics, Photosynthetically Active Radiation, Leaf Area Index (LAI), Fraction Of Absorbed Photosynthetically Active Radiation (fapar), Maximum/Minimum Temperature, 24 Hour Precipitation Amount, Snow Water Equivalent, Shortwave Radiation, Vapor Pressure
Factors influencing pronghorn migration behavior and plasticity DeVoe, Jesse D., Proffitt, Kelly M., Millspaugh, Joshua J. Maximum/Minimum Temperature, 24 Hour Precipitation Amount, Snow Water Equivalent, Shortwave Radiation, Vapor Pressure
Experimental spring planting and attribution of ponderosa pine seedling survival in a hot and dry subregion of the southwestern United States Petrie, Matthew D. Maximum/Minimum Temperature, 24 Hour Precipitation Amount, Snow Water Equivalent, Shortwave Radiation, Vapor Pressure
Assessment of convection-permitting hydroclimate modeling in urban areas across the contiguous United States Thompson, Liam, Wang, Chenghao, He, Cenlin, Lin, Tzu-Shun, Liu, Changhai, Dudhia, Jimy Maximum/Minimum Temperature, 24 Hour Precipitation Amount, Snow Water Equivalent, Shortwave Radiation, Vapor Pressure
Combined Effect of Heat and Outdoor O3 Pollution on Emergency Department visits in Florida Zhao, Xiuling, Melix, Bertram, Powell, Emily, Harville, Emily W., Uejio, Christopher K. Maximum/Minimum Temperature, 24 Hour Precipitation Amount, Snow Water Equivalent, Shortwave Radiation, Vapor Pressure
Compound heat and ozone pollution in the urban environment Wang, Chenghao, Hu, Xiao-Ming, Feron, Sarah, Leffel, Jessica, Cordero, Raul R. Vegetation Index, Normalized Difference Vegetation Index (NDVI), Enhanced Vegetation Index (EVI), Maximum/Minimum Temperature, 24 Hour Precipitation Amount, Snow Water Equivalent, Shortwave Radiation, Vapor Pressure
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