Earth Data School
About
Full catalog/Daymet_xval_V4R1_2132
Daymet_xval_V4R1_2132·v4.1·dataset

Weather-station inputs that check Daymet climate maps

Daymet: Station-Level Inputs and Cross-Validation for North America, Version 4 R1
atmosphere NASA ORNL_CLOUD Level 4 multiple
In plain English

What it measures. The actual ground weather-station readings (daily minimum and maximum temperature and total precipitation) used to build the Daymet climate maps, along with checks showing how well the maps match those stations.

How it's made. Compiled from surface weather stations across North America, Hawaii, and Puerto Rico, paired with cross-validation results from the Daymet modeling process.

How & where you'd use it. Mainly for researchers who want to verify the accuracy of Daymet climate maps or understand the raw station data behind them, rather than a finished map product itself.

What's measured

ATMOSPHERE › PRECIPITATION › PRECIPITATION AMOUNT › 24 HOUR PRECIPITATION AMOUNTATMOSPHERE › ATMOSPHERIC TEMPERATURE › SURFACE TEMPERATURE › MAXIMUM/MINIMUM TEMPERATURE

Coverage & cadence

  • Time span1950-01-01 → 2023-12-31
  • Measured byMODELS (Computer)
  • Processing levelLevel 4
  • Spatial extent-178.133, 14.0749, -52.6667, 82.9143
  • Formatsmultiple
  • StatusCOMPLETE

What you can do with it

  • Map air pollutants — NO₂, aerosols, ozone
  • Track greenhouse gases and Earth's energy budget
  • Feed weather and air-quality analysis
Official description

This dataset reports the station-level daily weather observation data and the corresponding cross-validation results for three Daymet model parameters: minimum temperature (tmin), maximum temperature (tmax), and daily total precipitation (prcp) across continental North America (including Canada, the United States, and Mexico), Hawaii, and Puerto Rico. Each data file contains the daily observations and cross-validation results for one parameter for each modeled region and each year, that is, from 1980 to the current calendar year for stations across continental North America and Hawaii and from 1950 to the current year for Puerto Rico. Also included are corresponding station metadata files listing every surface weather station used in Daymet processing for each parameter, region, and year and containing the station name, station identification, latitude, and longitude. The data are provided in netCDF and text formats. 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.

Get the data

daymet_xval_v4r1_2132_access.py
import earthaccess
earthaccess.login(strategy="netrc")          # free Earthdata Login

results = earthaccess.search_data(
    short_name="Daymet_xval_V4R1_2132",
    version="4.1",
    bounding_box=(-122.5, 37.2, -121.8, 37.9),  # your area (W,S,E,N)
    temporal=("2024-01-01", "2024-12-31"),       # your dates
)
files = earthaccess.open(results)   # stream straight from ORNL_CLOUD
Browsing CMR needs no login. Downloading or streaming bytes needs a free Earthdata Login + the earthaccess package.