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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: 2026-06-02

Documents

Publications Citing This Dataset

Filters
Title Year Author Topic
Plant functional traits as key regulators of interannual phenological variability in temperate forests Zhao, Yingyi, Wang, Zhihui, Dronova, Iryna, Yan, Zhengbing, Moon, Minkyu, Meng, Lin, Wang, Jing, Song, Guangqin, Guo, Zhengfei, Su, Yanjun, Liu, Lingli, Wu, Jin Reflectance, Maximum/Minimum Temperature, 24 Hour Precipitation Amount, Snow Water Equivalent, Shortwave Radiation, Vapor Pressure
Precipitation leads the long-term vegetation increase in the conterminous United States drylands Chang, Yuhe, Winkler, Alexander J, Noori, Amirhossein, Knyazikhin, Yuri, Myneni, Ranga B Land Use/Land Cover Classification, 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
Projected evolution of droughts and human exposure in the contiguous United States under SSP5-8.5: a regional downscaling perspective Zhang, Leyuan, Rubin, Hannah J, Chien, Rong-You, Fu, Joshua S, Rastogi, Deeksha, Kao, Shih-Chieh, Ashfaq, Moetasim Maximum/Minimum Temperature, 24 Hour Precipitation Amount, Snow Water Equivalent, Shortwave Radiation, Vapor Pressure
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, Shortwave Radiation, Vapor Pressure
Urbanization results in highly dynamic, degraded benthic macroinvertebrate communities in North Carolina streams Westman, Riley C., Martin, Katherine L. Maximum/Minimum Temperature, 24 Hour Precipitation Amount, Snow Water Equivalent, Shortwave Radiation, Vapor Pressure
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, Shortwave Radiation, Vapor Pressure
Regional scale simulations of daily suspended sediment concentration at Gupta, Abhinav, Feng, Dongmei Leaf Area Index (LAI), Fraction Of Absorbed Photosynthetically Active Radiation (fapar), Leaf Characteristics, Photosynthetically Active Radiation, Maximum/Minimum Temperature, 24 Hour Precipitation Amount, Snow Water Equivalent, Shortwave Radiation, Vapor Pressure
Regional-specific trends of PM2.5 and O3 temperature sensitivity in the United States Yin, Lifei, Bai, Bin, Zhang, Bingqing, Zhu, Qiao, Di, Qian, Requia, Weeberb J., Schwartz, Joel D., Shi, Liuhua, Liu, Pengfei Carbonaceous Aerosols, Nitrogen Oxides, Particulates, Hydrogen Cyanide, Emissions, Non-methane Hydrocarbons/Volatile Organic Compounds, Particulate Matter, Fire Occurrence, Nitrogen Oxides, Sulfur Dioxide, Carbon And Hydrocarbon Compounds, Maximum/Minimum Temperature, 24 Hour Precipitation Amount, Snow Water Equivalent, Shortwave Radiation, Vapor Pressure
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, Shortwave Radiation, Vapor Pressure
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, Shortwave Radiation, Vapor Pressure
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, Shortwave Radiation, Vapor Pressure
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, Shortwave Radiation, Vapor Pressure
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, Shortwave Radiation, Vapor Pressure
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, Shortwave Radiation, Vapor Pressure, Carbon, Soil Ph, Cation Exchange Capacity, Soil Bulk Density, Soil Depth
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, Shortwave Radiation, Vapor Pressure, Carbon, Soil Ph, Cation Exchange Capacity, Soil Bulk Density, Soil Depth
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, Shortwave Radiation, Vapor Pressure
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, Shortwave Radiation, Vapor Pressure
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, Shortwave Radiation, Vapor Pressure
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, Shortwave Radiation, Vapor Pressure
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, Shortwave Radiation, Vapor Pressure
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, Shortwave Radiation, Vapor Pressure
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, Shortwave Radiation, Vapor Pressure
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, Shortwave Radiation, Vapor Pressure
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, Shortwave Radiation, Vapor Pressure
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, Shortwave Radiation, Vapor Pressure
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