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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
Projects
Daymet
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: 2026-06-06

Documents

Publications Citing This Dataset

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Title Year Author Topic
Yield From Iowa's First Commercial Miscanthus Fields: Implications of Spatial Variability for Productivity and Sustainability Beyond Research Plots Emran, ShahAl, Petersen, Bryan M., Roney, Heather Elizabeth, Masters, Michael David, Varela, Sebastian, Hedrick, Travis, Leakey, Andrew D. B., VanLoocke, Andy, Heaton, Emily A. Maximum/Minimum Temperature, 24 Hour Precipitation Amount, Snow Water Equivalent, Vapor Pressure, Shortwave Radiation
When Do Riverine Systems Feel the Burn? Simulating How Burn Extent and Severity Modulate Hydrologic Controls on Biogeochemical Export Wampler, K. A., MyersPigg, A. N., Kang, H., Regier, P., Scheibe, T. D., Bladon, K. D. Maximum/Minimum Temperature, 24 Hour Precipitation Amount, Snow Water Equivalent, Vapor Pressure, Shortwave Radiation, Leaf Characteristics, Photosynthetically Active Radiation, Leaf Area Index (LAI), Fraction Of Absorbed Photosynthetically Active Radiation (fapar), Evapotranspiration, Photosynthesis, Primary Production, Latent Heat Flux
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, Vapor Pressure, Shortwave Radiation, Surface Pressure, Longwave Radiation, Surface Temperature, Evaporation, Humidity, Convection, Surface Winds, Rain, Land Surface Temperature, Plant Phenology, Enhanced Vegetation Index (EVI)
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, Vapor Pressure, Shortwave Radiation
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, Vapor Pressure, Shortwave Radiation
Catchment Attributes and MEteorology for Large-Sample SPATially Knoben, Wouter J. M., Thebault, Cyril, Keshavarz, Kasra, Torres-Rojas, Laura, Chaney, Nathaniel W., Pietroniro, Alain, Clark, Martyn P. Crop/Plant Yields, Landscape Patterns, Cropland, Land Use/Land Cover Classification, Leaf Characteristics, Photosynthetically Active Radiation, Leaf Area Index (LAI), Fraction Of Absorbed Photosynthetically Active Radiation (fapar), Stratigraphic Sequence, Digital Elevation/Terrain Model (DEM), Soil Depth, Sediments, Maximum/Minimum Temperature, 24 Hour Precipitation Amount, Snow Water Equivalent, Vapor Pressure, Shortwave Radiation
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, Vapor Pressure, Shortwave Radiation
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, Vapor Pressure, Shortwave Radiation
Climate drives variation in optimal phenology: 46 years of multienvironment trials in sunflower Clark, Eliza I., Moore, Miles A., Khoury, Colin K., Hulke, Brent S., Kane, Nolan C., Elmendorf, Sarah C. Maximum/Minimum Temperature, 24 Hour Precipitation Amount, Snow Water Equivalent, Vapor Pressure, Shortwave Radiation
Climate adaptation in the southwest US: The SWPar4. 5 parameter set for stochastic weather generators Fullhart, Andrew T., Gao, Shang, Wang, Wenting, Elias, Emile, Armendariz, Gerardo, Goodrich, David C. Maximum/Minimum Temperature, 24 Hour Precipitation Amount, Snow Water Equivalent, Vapor Pressure, Shortwave Radiation
Hydroclimate-coupled framework for assessing power system resilience under summer drought and climate change Shuai, Hang, Li, Fangxing, Zhu, Jinxiang, Tingen, William Jerome, Mukherjee, Srijib Maximum/Minimum Temperature, 24 Hour Precipitation Amount, Snow Water Equivalent, Vapor Pressure, Shortwave Radiation
Integrated tree canopy expansion and cool roofs can optimize air temperature and heat exposure reductions in Boston Smith, Ian A., Li, Dan, Fork, David K., Wellenius, Gregory A., Hutyra, Lucy R. Maximum/Minimum Temperature, 24 Hour Precipitation Amount, Snow Water Equivalent, Vapor Pressure, Shortwave Radiation
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, Vapor Pressure, Shortwave Radiation
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, Vapor Pressure, Shortwave Radiation
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, Vapor Pressure, Shortwave Radiation
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, Vapor Pressure, Shortwave Radiation
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, Vapor Pressure, Shortwave Radiation
Identifying surface sulphur dioxide (SO2) monitoring gaps in Saint John, Canada with land use regression and hot spot mapping Siu, Tsz Kin, Greene, Christopher S., Fong, Kelvin C. Land Use/Land Cover Classification, Maximum/Minimum Temperature, 24 Hour Precipitation Amount, Snow Water Equivalent, Vapor Pressure, Shortwave Radiation
Effects of ConvectionPermitting Grid Resolution on ColdSeason Precipitation Simulated by the Canadian Regional Climate Model Version 6 Over the Province of Quebec, Canada Chalifour, O., Music, B., Theriault, J. M., Nadeau, D. F., BedardTherrien, A. Maximum/Minimum Temperature, 24 Hour Precipitation Amount, Snow Water Equivalent, Vapor Pressure, Shortwave Radiation
Effect of water delivery and irrigation for riparian restoration in the Colorado River Delta, Mexico Nagler, Pamela L., Sall, Ibrahima, GomezSapiens, Martha M., Flessa, Karl W., BarretoMunoz, Armando, Didan, Kamel Maximum/Minimum Temperature, 24 Hour Precipitation Amount, Snow Water Equivalent, Vapor Pressure, Shortwave Radiation
Evaluating elk distribution and conflict under proposed management alternatives at the National Elk Refuge in Jackson, Wyoming Cotterill, Gavin G., Cross, Paul C., Cole, Eric K., Cook, Jonathan D., Mceachran, Margaret C., Graves, Tabitha A. RADAR IMAGERY, Terrain Elevation, Topographical Relief Maps, Digital Elevation/Terrain Model (DEM), Maximum/Minimum Temperature, 24 Hour Precipitation Amount, Snow Water Equivalent, Vapor Pressure, Shortwave Radiation
Evaluating Vegetation Greening and Browning across the Rio Grande Basin Talchabhadel, Rocky, Rhodes, Edward C., Palmate, Santosh S., Kumar, Saurav Precipitation, Precipitation Amount, Precipitation Rate, Snow, Rain, Leaf Area Index (LAI), Fraction Of Absorbed Photosynthetically Active Radiation (fapar), Reflectance, Maximum/Minimum Temperature, 24 Hour Precipitation Amount, Snow Water Equivalent, Vapor Pressure, Shortwave Radiation
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, Vapor Pressure, Shortwave Radiation
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, Vapor Pressure, Shortwave Radiation
Combining Eddy Covariance Towers, Field Measurements, and the MEMS 2 Ecosystem Model Improves Confidence in the Climate Impacts of Bioenergy With Carbon Capture and Storage Falvo, Grant, Zhang, Yao, Abraha, Michael, Mosier, Samantha, Su, YahnJauh, Lei, Cheyenne, Chen, Jiquan, Cotrufo, M. Francesca, Robertson, G. Philip Maximum/Minimum Temperature, 24 Hour Precipitation Amount, Snow Water Equivalent, Vapor Pressure, Shortwave Radiation
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