Daymet V3 provides gridded estimates of daily weather parameters for
United States, Mexico, Canada, Hawaii, and Puerto Rico. It is derived
from selected meteorological station data and various supporting data
sources.
Compared to the previous version, Daymet V3 uses an entirely new suite
of inputs including:
NASA SRTM DEM version 2.1.
Land/Water Mask: MODIS 250 MOD44W_v2.NASA_ORNL_
Horizon files derived from the SRTM DEM.
Ground station weather inputs from several sources with QA/QC.
Thornton, P.E., M.M. Thornton, B.W. Mayer, Y. Wei, R. Devarakonda,
R.S.Vose, and R.B. Cook. {YEAR}. Daymet: Daily Surface Weather Data on a
1-km Grid for North America, Version3. ORNL DAAC, Oak Ridge, Tennessee, USA
Other Citation Details - Thornton, P.E., M.M. Thornton, B.W. Mayer, Y. Wei, R. Devarakonda, R.S. Vose, and R.B. Cook. 2016.
Daymet: Daily Surface Weather Data on a 1-km Grid for North America, Version 3. ORNL DAAC, Oak Ridge, Tennessee, USA.
doi:10.3334/ORNLDAAC/1328
Daymet V3 provides gridded estimates of daily weather parameters for United States, Mexico, Canada, Hawaii, and Puerto Rico. It is derived from selected meteorological station data and various supporting data sources. Compared to the previous version, Daymet V3 uses an entirely new suite of inputs including: NASA SRTM DEM version …
[[["Easy to understand","easyToUnderstand","thumb-up"],["Solved my problem","solvedMyProblem","thumb-up"],["Other","otherUp","thumb-up"]],[["Missing the information I need","missingTheInformationINeed","thumb-down"],["Too complicated / too many steps","tooComplicatedTooManySteps","thumb-down"],["Out of date","outOfDate","thumb-down"],["Samples / code issue","samplesCodeIssue","thumb-down"],["Other","otherDown","thumb-down"]],[],[[["\u003cp\u003eThis dataset, NASA/ORNL/DAYMET_V3, has been superseded by a newer version, NASA/ORNL/DAYMET_V4.\u003c/p\u003e\n"],["\u003cp\u003eDaymet V3 provides daily estimates of weather parameters (e.g., precipitation, temperature, radiation) for North America (including Hawaii and Puerto Rico).\u003c/p\u003e\n"],["\u003cp\u003eData is available from 1980 to 2019 at a 1km resolution and is derived from meteorological station data and supporting sources.\u003c/p\u003e\n"],["\u003cp\u003eThis dataset is in the public domain and freely available for use and distribution.\u003c/p\u003e\n"]]],[],null,["# Daymet V3: Daily Surface Weather and Climatological Summaries [deprecated]\n\n**Caution:** This dataset has been superseded by [NASA/ORNL/DAYMET_V4](/earth-engine/datasets/catalog/NASA_ORNL_DAYMET_V4). \n\nDataset Availability\n: 1980-01-01T00:00:00Z--2019-12-31T00:00:00Z\n\nDataset Provider\n:\n\n\n [NASA ORNL DAAC at Oak Ridge National Laboratory](https://doi.org/10.3334/ORNLDAAC/1328)\n\nCadence\n: 1 Day\n\nTags\n:\n climate \n daily \n daylight \n daymet \n flux \n geophysical \n nasa \n ornl \n precipitation \n radiation \n snow \n temperature \n vapor \n water \nweather \n\n#### Description\n\nDaymet V3 provides gridded estimates of daily weather parameters for\nUnited States, Mexico, Canada, Hawaii, and Puerto Rico. It is derived\nfrom selected meteorological station data and various supporting data\nsources.\n\nCompared to the previous version, Daymet V3 uses an entirely new suite\nof inputs including:\n\n- NASA SRTM DEM version 2.1.\n\n- Land/Water Mask: MODIS 250 `MOD44W_v2.NASA_ORNL_`\n\n- Horizon files derived from the SRTM DEM.\n\n- Ground station weather inputs from several sources with QA/QC.\n\nDocumentation:\n\n- [ORNL DAAC Dataset Documentation](https://daac.ornl.gov/DAYMET/guides/Daymet_V3_CFMosaics.html)\n\n- [Dataset Documentation](https://daac.ornl.gov/daacdata/daymet/Daymet_V3_CFMosaics/comp/Daymet_V3_CFMosaics.pdf)\n\n- [The THREDDS location for this Collection](https://thredds.daac.ornl.gov/thredds/catalog/ornldaac/1328/catalog.html)\n\n### Bands\n\n\n**Pixel Size**\n\n1000 meters\n\n**Bands**\n\n| Name | Units | Min | Max | Pixel Size | Description |\n|--------|---------|-------|---------|------------|----------------------------------------------------------------------------------------------------------------------------|\n| `dayl` | seconds | 0\\* | 86400\\* | meters | Duration of the daylight period. Based on the period of the day during which the sun is above a hypothetical flat horizon. |\n| `prcp` | mm | 0\\* | 200\\* | meters | Daily total precipitation, sum of all forms converted to water-equivalent. |\n| `srad` | W/m\\^2 | 0\\* | 800\\* | meters | Incident shortwave radiation flux density, taken as an average over the daylight period of the day. |\n| `swe` | kg/m\\^2 | 0\\* | 1000\\* | meters | Snow water equivalent, the amount of water contained within the snowpack. |\n| `tmax` | °C | -50\\* | 50\\* | meters | Daily maximum 2-meter air temperature. |\n| `tmin` | °C | -50\\* | 50\\* | meters | Daily minimum 2-meter air temperature. |\n| `vp` | Pa | 0\\* | 10000\\* | meters | Daily average partial pressure of water vapor. |\n\n\\* estimated min or max value\n\n### Terms of Use\n\n**Terms of Use**\n\nThis dataset is in the public domain and is available\nwithout restriction on use and distribution. See [NASA's\nEarth Science Data \\& Information Policy](https://www.earthdata.nasa.gov/engage/open-data-services-and-software/data-and-information-policy)\nfor additional information.\n\n### Citations\n\nCitations:\n\n- Thornton, P.E., M.M. Thornton, B.W. Mayer, Y. Wei, R. Devarakonda,\n R.S.Vose, and R.B. Cook. {YEAR}. Daymet: Daily Surface Weather Data on a\n 1-km Grid for North America, Version3. ORNL DAAC, Oak Ridge, Tennessee, USA\n- Other Citation Details - Thornton, P.E., M.M. Thornton, B.W. Mayer, Y. Wei, R. Devarakonda, R.S. Vose, and R.B. Cook. 2016.\n Daymet: Daily Surface Weather Data on a 1-km Grid for North America, Version 3. ORNL DAAC, Oak Ridge, Tennessee, USA.\n [doi:10.3334/ORNLDAAC/1328](https://doi.org/10.3334/ORNLDAAC/1328)\n\n### DOIs\n\n- \u003chttps://doi.org/10.3334/ORNLDAAC/1328\u003e\n\n### Explore with Earth Engine\n\n| **Important:** Earth Engine is a platform for petabyte-scale scientific analysis and visualization of geospatial datasets, both for public benefit and for business and government users. Earth Engine is free to use for research, education, and nonprofit use. To get started, please [register for Earth Engine access.](https://console.cloud.google.com/earth-engine)\n\n### Code Editor (JavaScript)\n\n```javascript\nvar dataset = ee.ImageCollection('NASA/ORNL/DAYMET_V3')\n .filter(ee.Filter.date('2017-04-01', '2017-04-30'));\nvar maximumTemperature = dataset.select('tmax');\nvar maximumTemperatureVis = {\n min: -40.0,\n max: 30.0,\n palette: ['1621A2', 'white', 'cyan', 'green', 'yellow', 'orange', 'red'],\n};\nMap.setCenter(-110.21, 35.1, 4);\nMap.addLayer(maximumTemperature, maximumTemperatureVis, 'Maximum Temperature');\n```\n[Open in Code Editor](https://code.earthengine.google.com/?scriptPath=Examples:Datasets/NASA/NASA_ORNL_DAYMET_V3) \n[Daymet V3: Daily Surface Weather and Climatological Summaries \\[deprecated\\]](/earth-engine/datasets/catalog/NASA_ORNL_DAYMET_V3) \nDaymet V3 provides gridded estimates of daily weather parameters for United States, Mexico, Canada, Hawaii, and Puerto Rico. It is derived from selected meteorological station data and various supporting data sources. Compared to the previous version, Daymet V3 uses an entirely new suite of inputs including: NASA SRTM DEM version ... \nNASA/ORNL/DAYMET_V3, climate,daily,daylight,flux,geophysical,nasa,ornl,precipitation,radiation,snow,temperature,vapor,water,weather \n1980-01-01T00:00:00Z/2019-12-31T00:00:00Z \n1.6 -150.8 84 -1.1 \nGoogle Earth Engine \nhttps://developers.google.com/earth-engine/datasets\n\n- [https://doi.org/10.3334/ORNLDAAC/1328](https://doi.org/https://doi.org/10.3334/ORNLDAAC/1328)\n- [https://doi.org/10.3334/ORNLDAAC/1328](https://doi.org/https://developers.google.com/earth-engine/datasets/catalog/NASA_ORNL_DAYMET_V3)"]]
