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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: 2026-07-18

Documents

Publications Citing This Dataset

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Title Year Author Topic
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, Vapor Pressure, Shortwave Radiation
WRF-ELM v1. 0: a regional climate model to study landatmosphere interactions over heterogeneous land use regions Huang, Huilin, Qian, Yun, Bisht, Gautam, Wang, Jiali, Chakraborty, Tirthankar, Hao, Dalei, Li, Jianfeng, Thurber, Travis, Singh, Balwinder, Yang, Zhao, Liu, Ye, Xue, Pengfei, Sacks, William J., Coon, Ethan, Hetland, Robert Maximum/Minimum Temperature, 24 Hour Precipitation Amount, Snow Water Equivalent, Vapor Pressure, Shortwave Radiation
Wildland FireRelated Smoke PM2.5 and Cardiovascular Disease Emergency Department Visits in the Western United States Li, Linzi, Wang, Wenhao, Chang, Howard H., Alonso, Alvaro, Liu, Yang Maximum/Minimum Temperature, 24 Hour Precipitation Amount, Snow Water Equivalent, Vapor Pressure, Shortwave Radiation
Hindcasting fine particulate matter in Alaska, US, during wildfire seasons Bredder, Allison, Loboda, Tatiana V., Chen, Dong Vegetation Index, Normalized Difference Vegetation Index (NDVI), Enhanced Vegetation Index (EVI), Aerosol Optical Depth/Thickness, Maximum/Minimum Temperature, 24 Hour Precipitation Amount, Snow Water Equivalent, Vapor Pressure, Shortwave Radiation
Mapping Daily Air Temperature Over the Hawaiian Islands From 1990 to 2021 via an Optimized Piecewise Linear Regression Technique Kodama, Keri M., Kourkchi, Ehsan, Longman, Ryan J., Lucas, Matthew P., Bateni, Sayed M., Huang, YuFen, KagawaViviani, Aurora, Mclean, Jared, Cleveland, Sean B., Giambelluca, Thomas W. Maximum/Minimum Temperature, 24 Hour Precipitation Amount, Snow Water Equivalent, Vapor Pressure, Shortwave Radiation
Modeling the Effects of Artificial Drainage on Agriculture-Dominated Watersheds Using a Fully Distributed Integrated Hydrology Model Rathore, Saubhagya S., Svyatsky, Daniil S., Coon, Ethan T., Son, Kyongho, Painter, Scott L. Maximum/Minimum Temperature, 24 Hour Precipitation Amount, Snow Water Equivalent, Vapor Pressure, Shortwave Radiation
Long-Term Decline of the Spotted Salamander (Ambystoma maculatum) in an Undeveloped Landscape Billet, Logan S., Alshwairikh, Yara A., Freidenburg, L. Kealoha, Rubinstein, Adriana, Tracy, Samantha, Nelson, Sydney, Skelly, David K. Maximum/Minimum Temperature, 24 Hour Precipitation Amount, Snow Water Equivalent, Vapor Pressure, Shortwave Radiation
Leveraging gauge networks and strategic discharge measurements to aid the development of continuous streamflow records Vlah, Michael J., Ross, Matthew R. V., Rhea, Spencer, Bernhardt, Emily S. Maximum/Minimum Temperature, 24 Hour Precipitation Amount, Snow Water Equivalent, Vapor Pressure, Shortwave Radiation
Leveraging satellite observations to reveal ecological drivers of pest densities across landscapes Emery, Sara E., Rosenheim, Jay A., Chaplin-Kramer, Rebecca, Sharp, Richard, Karp, Daniel S. Maximum/Minimum Temperature, 24 Hour Precipitation Amount, Snow Water Equivalent, Vapor Pressure, Shortwave Radiation
Integrating counts from rigorous surveys and participatory science to Zhao, Qing, Latif, Quresh S., Nuse, Bryan L., Pavlacky, David C., Kilner, Christopher L., Ryder, T. Brandt, Latimer, Christopher E. Land Use/Land Cover Classification, Maximum/Minimum Temperature, 24 Hour Precipitation Amount, Snow Water Equivalent, Vapor Pressure, Shortwave Radiation
Increasing Soil Water Drought in Response to Altered Precipitation Timing Across the Western United States Zhang, Fangyue, Biederman, Joel A., Schlaepfer, Daniel R., Bradford, John B., Reed, Sasha C., Smith, William K. Maximum/Minimum Temperature, 24 Hour Precipitation Amount, Snow Water Equivalent, Vapor Pressure, Shortwave Radiation
Impacts of Spatial and Temporal Resolution on Remotely Sensed Corn and Gao, Feng, Anderson, Martha, Houborg, Rasmus Land Use/Land Cover Classification, Reflectance, Enhanced Vegetation Index (EVI), Maximum/Minimum Temperature, 24 Hour Precipitation Amount, Snow Water Equivalent, Vapor Pressure, Shortwave Radiation
Improving the estimation of atmospheric water vapor pressure using interpretable long short-term memory networks Gao, B., Coon, E.T., Thornton, P.E., Lu, D. Leaf Area Index (LAI), Fraction Of Absorbed Photosynthetically Active Radiation (fapar), Land Use/Land Cover Classification, Leaf Characteristics, Photosynthetically Active Radiation, Maximum/Minimum Temperature, 24 Hour Precipitation Amount, Snow Water Equivalent, Vapor Pressure, Shortwave Radiation
Improving the interpretability and predictive power of hydrological models: Applications for daily streamflow in managed and unmanaged catchments Bhasme, Pravin, Bhatia, Udit Maximum/Minimum Temperature, 24 Hour Precipitation Amount, Snow Water Equivalent, Vapor Pressure, Shortwave Radiation
Hydrometric data discretization into environmental flow components: a new, practical approach to explore concentration-discharge relationships Ariano, Sarah S., 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
Large-scale assessment of permafrost conditions using the Canadian Permafrost Electrical Resistivity Survey (CPERS) database University of Calgary, Herring, Teddi, Lewkowicz, Antoni, Way, Robert, Wang, Yifeng, Chiasson, Alexandre, Froese, Duane Maximum/Minimum Temperature, 24 Hour Precipitation Amount, Snow Water Equivalent, Vapor Pressure, Shortwave Radiation
Projected Changes in Precipitation Extremes Across the Mississippi River Basin Using the NASA Global Daily Downscaled Datasets NEX-GDDP-CMIP6 Talchabhadel, Rocky, Bhattarai, Saurav, Bista, Sunil 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
Regularized Latent Trajectory Models for Spatio-temporal Population Dynamics Lu, Xinyi, Kanno, Yoichiro, Valentine, George P., Kulp, Matt A., Hooten, Mevin B. 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
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
Predicting insect population dynamics by linking phenology models and monitoring data Rincon, Diego F., Esch, Evan D., Gutierrez-Illan, Javier, Tesche, Melissa, Crowder, David W. Maximum/Minimum Temperature, 24 Hour Precipitation Amount, Snow Water Equivalent, Vapor Pressure, Shortwave Radiation
Probabilistic flood inundation mapping through copula Bayesian multi-modeling of precipitation products Gomez, Francisco Javier, Jafarzadegan, Keighobad, Moftakhari, Hamed, Moradkhani, Hamid Precipitation, Precipitation Amount, Precipitation Rate, Snow, Rain, 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, Land Surface Temperature
Preterm and Early-Term Delivery After Heat Waves in 50 US Metropolitan Areas Darrow, Lyndsey A., Huang, Mengjiao, Warren, Joshua L., Strickland, Matthew J., Holmes, Heather A., Newman, Andrew J., Chang, Howard H. Maximum/Minimum Temperature, 24 Hour Precipitation Amount, Snow Water Equivalent, Vapor Pressure, Shortwave Radiation
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