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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: 2026-06-08

Documents

Publications Citing This Dataset

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Title Year Author Topic
Elevated Ambient Temperature Associated With Increased Cardiovascular DiseaseRisk Among Patients on Hemodialysis Xi, Yuzhi, Wettstein, Zachary S., Kshirsagar, Abhijit V., Liu, Yang, Zhang, Danlu, Hang, Yun, Rappold, Ana G. Maximum/Minimum Temperature, 24 Hour Precipitation Amount, Snow Water Equivalent, Vapor Pressure, Shortwave Radiation
Embedded physical constraints in machine learning to enhance vegetation phenology prediction Cao, Mengying, Weng, Qihao Maximum/Minimum Temperature, 24 Hour Precipitation Amount, Snow Water Equivalent, Vapor Pressure, Shortwave Radiation
Effects of air pollution on emergency room visits for mental disorders: risks and effect modification by comorbid physical disorders and personal characteristics Yoo, Eun-hye, Roberts, John E, Chen, Kai Maximum/Minimum Temperature, 24 Hour Precipitation Amount, Snow Water Equivalent, Vapor Pressure, Shortwave Radiation
Dramatic recent declines in the size of monarch butterfly (Danaus plexippus) roosts during fall migration Davis, Andrew K., Croy, Jordan R., Snyder, William E. Maximum/Minimum Temperature, 24 Hour Precipitation Amount, Snow Water Equivalent, Vapor Pressure, Shortwave Radiation
Evaluating the utility of weather generators in crop simulation models for in-season yield forecasting Nandan, Rohit, Bandaru, Varaprasad, Meduri, Pridhvi, Jones, Curtis, Lollato, Romulo Maximum/Minimum Temperature, 24 Hour Precipitation Amount, Snow Water Equivalent, Vapor Pressure, Shortwave Radiation
Estimating the impacts of nonoptimal temperatures on mortality: A study in British Columbia, Canada, 20012021 Shrestha, Rudra K., Sevcenco, Ioana, Casari, Priscila, Ngo, Henry, Erickson, Anders, Lavoie, Martin, Hinshaw, Deena, Henry, Bonnie, Ye, Xibiao Maximum/Minimum Temperature, 24 Hour Precipitation Amount, Snow Water Equivalent, Vapor Pressure, Shortwave Radiation
Distinct latitudinal patterns of shifting spring phenology across the Appalachian Trail Corridor Tourville, Jordon C., Murray, Georgia L. D., Nelson, Sarah J. Maximum/Minimum Temperature, 24 Hour Precipitation Amount, Snow Water Equivalent, Vapor Pressure, Shortwave Radiation
Customized Statistically Downscaled CMIP5 and CMIP6 Projections: Application in the Edwards Aquifer Region in South-Central Texas Wootten, A. M., Basagaoglu, H., Bertetti, F. P., Chakraborty, D., Sharma, C., Samimi, M., Mirchi, A. Maximum/Minimum Temperature, 24 Hour Precipitation Amount, Snow Water Equivalent, Vapor Pressure, Shortwave Radiation
High ambient temperature in pregnancy and risk of childhood acute lymphoblastic leukaemia: an observational study Rogne, Tormod, Wang, Rong, Wang, Pin, Deziel, Nicole C, Metayer, Catherine, Wiemels, Joseph L, Chen, Kai, Warren, Joshua L, Ma, Xiaomei Maximum/Minimum Temperature, 24 Hour Precipitation Amount, Snow Water Equivalent, Vapor Pressure, Shortwave Radiation
Heat-related illness among workers in British Columbia, Canada: Extreme hot weather in 2021 compared to 20012020 Guo, Xiaocong, Weinberger, Kate R, Tamburic, Lillian, Peters, Cheryl E, McLeod, Christopher B Maximum/Minimum Temperature, 24 Hour Precipitation Amount, Snow Water Equivalent, Vapor Pressure, Shortwave Radiation
Growing degree-days do not explain moth species' distributions at broad scales Keefe, Hannah E., Kharouba, Heather M. Maximum/Minimum Temperature, 24 Hour Precipitation Amount, Snow Water Equivalent, Vapor Pressure, Shortwave Radiation
Habitat alteration or climate: What drives the densities of an invading ungulate? Dickie, Melanie, Serrouya, Robert, Becker, Marcus, DeMars, Craig, Noonan, Michael J., Steenweg, Robin, Boutin, Stan, Ford, Adam T. Land Use/Land Cover, Anthropogenic/Human Influenced Ecosystems, Sustainability, Maximum/Minimum Temperature, 24 Hour Precipitation Amount, Snow Water Equivalent, Vapor Pressure, Shortwave Radiation
Estimates of Southern White-tailed Ptarmigan daily nest survival from multiple sites in the Southern Rocky Mountains of Colorado Wann, Gregory, Seglund, Amy, Street, Phillip, Parker, Nicholas, Nelson, Shelley, Runge, Jonathan, Braun, Clait, Aldridge, Cameron Maximum/Minimum Temperature, 24 Hour Precipitation Amount, Snow Water Equivalent, Vapor Pressure, Shortwave Radiation
Future Climate Projections for South Florida: Improving the Accuracy of Air Temperature and Precipitation Extremes With a Hybrid Statistical Bias Correction Technique Rahimi, Leila, Hoque, Mushfiqul, Ahmadisharaf, Ebrahim, Alamdari, Nasrin, Misra, Vasubandhu, Maran, Ana Carolina, Kao, ShihChieh, AghaKouchak, Amir, Talchabhadel, Rocky Maximum/Minimum Temperature, 24 Hour Precipitation Amount, Snow Water Equivalent, Vapor Pressure, Shortwave Radiation
Extreme precipitation promotes invasion in managed grasslands Ratcliffe, Hugh, Kendig, Amy, Vacek, Sara, Carlson, Daren, Ahlering, Marissa, Dee, Laura E. Maximum/Minimum Temperature, 24 Hour Precipitation Amount, Snow Water Equivalent, Vapor Pressure, Shortwave Radiation
Evidence of ecosystem tipping point on St. Lawrence Island: Widespread lake drainage events after 2018 Liu, Aobo, Cheng, Xiao, Wang, Chengxin, Chen, Yating Maximum/Minimum Temperature, 24 Hour Precipitation Amount, Snow Water Equivalent, Vapor Pressure, Shortwave Radiation
Evaluation of precipitation across the contiguous United States, Alaska, and Puerto Rico in multi-decadal convection-permitting simulations Akinsanola, Akintomide Afolayan, Jung, Chunyong, Wang, Jiali, Kotamarthi, Veerabhadra Rao Maximum/Minimum Temperature, 24 Hour Precipitation Amount, Snow Water Equivalent, Vapor Pressure, Shortwave Radiation
Evaluation of the Effect of Sentinel-1 SAR and Environmental Factors in Alfalfa Yield and Quality Estimation Yu, Tong, Zhou, Jing, Ranjbar, Sadegh, Chen, Jiang, Digman, Matthew F., Zhang, Zhou Maximum/Minimum Temperature, 24 Hour Precipitation Amount, Snow Water Equivalent, Vapor Pressure, Shortwave Radiation
Examining contaminant transport hotspots and their predictability across contrasted watersheds Ariano, Sarah S., Bain, Jamie, Ali, Genevieve Maximum/Minimum Temperature, 24 Hour Precipitation Amount, Snow Water Equivalent, Vapor Pressure, Shortwave Radiation, Carbon, Soil Ph, Cation Exchange Capacity, Soil Bulk Density, Soil Depth
Evaluation of groundwater resources in the Upper White River Basin within Mount Rainier National Park, Washington state, 2020 Fuhrig, Leland T., Long, Andrew J., Headman, Alexander O. Maximum/Minimum Temperature, 24 Hour Precipitation Amount, Snow Water Equivalent, Vapor Pressure, Shortwave Radiation
Climate change and C<inf>4</inf> and C<inf>3</inf> grasses in a midlatitude dryland steppe Anderson, Robert C., Martyn, Trace E., Renne, Rachel R., Burke, Ingrid C., Lauenroth, William K. Maximum/Minimum Temperature, 24 Hour Precipitation Amount, Snow Water Equivalent, Vapor Pressure, Shortwave Radiation
Phenologically Corrected Crop Condition Mapping and Assessment with Vegetation Index Time Series Zhao, Haoteng, Gao, Feng, Anderson, Martha, Cirone, Richard, Chang, Jisung, Lin, Li, Zhang, Chen, Li, Hui, Zhao, Haipeng Maximum/Minimum Temperature, 24 Hour Precipitation Amount, Snow Water Equivalent, Vapor Pressure, Shortwave Radiation
Phenology and Plant Functional Type Link Optical Properties of Vegetation Canopies to Patterns of Vertical Vegetation Complexity Jurayj, Duncan, Bowers, Rebecca, Fayne, Jessica V. Aquatic Ecosystems, Terrestrial Ecosystems, Vegetation, Soils, Maximum/Minimum Temperature, 24 Hour Precipitation Amount, Snow Water Equivalent, Vapor Pressure, Shortwave Radiation, Reflectance, Terrain Elevation, Glacier Elevation/Ice Sheet Elevation, Sea Ice Elevation, Vegetation Height, Land Use/Land Cover Classification, Forests, Vegetation Cover, Alpine/Tundra, Dominant Species, Plant Phenology, Land Use/Land Cover, Enhanced Vegetation Index (EVI), Sensor Counts
Post-Fire Sediment Yield From a Central California Watershed: Field Measurements and Validation of the WEPP Model East, Amy E., Logan, Joshua B., Dow, Helen W., Smith, Douglas P., Iampietro, Pat, Warrick, Jonathan A., Lorenson, Thomas D., Hallas, Leticia, Kozlowicz, Benjamin Maximum/Minimum Temperature, 24 Hour Precipitation Amount, Snow Water Equivalent, Vapor Pressure, Shortwave Radiation
Potential long-term, global effects of enhancing the domestic terrestrial carbon sink in the United States through no-till and cover cropping Weber, Maridee, Wise, Marshall, Lamers, Patrick, Wang, Yong, Avery, Greg, Morris, Kendalynn A., Edmonds, Jae Maximum/Minimum Temperature, 24 Hour Precipitation Amount, Snow Water Equivalent, Vapor Pressure, Shortwave Radiation
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