Earth Data School
About
Full catalog/Daymet_Annual_V4R1_2130
Daymet_Annual_V4R1_2130·v4.1·dataset

Yearly weather summaries for North America (1 km)

Daymet: Annual Climate Summaries on a 1-km Grid for North America, Version 4 R1
atmosphere NASA ORNL_CLOUD Level 4 multiple
In plain English

What it measures. Yearly weather summaries for North America at 1 km detail: average high and low temperatures, total precipitation, humidity (vapor pressure), and snow water equivalent.

How it's made. Derived by summarizing Daymet daily weather data, which is itself built from ground weather-station records interpolated onto a fine grid; this is a model-based product, not a satellite one.

How & where you'd use it. Useful for studying regional climate, agriculture, water resources and ecology across the US, Canada, Mexico, Hawaii and Puerto Rico.

What's measured

ATMOSPHERE › ATMOSPHERIC TEMPERATURE › SURFACE TEMPERATURE › MAXIMUM/MINIMUM TEMPERATUREATMOSPHERE › PRECIPITATION › PRECIPITATION AMOUNTATMOSPHERE › PRECIPITATION › SNOW WATER EQUIVALENTATMOSPHERE › ATMOSPHERIC WATER VAPOR › WATER VAPOR INDICATORS › VAPOR PRESSUREATMOSPHERE › ATMOSPHERIC RADIATION › SHORTWAVE RADIATION

Coverage & cadence

  • Time span1950-01-01 → 2024-12-31
  • Measured byMODELS (Computer)
  • Processing levelLevel 4
  • Spatial extent-178.204, 6.07616, -53.055, 83.7064
  • 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 provides annual climate summaries derived from Daymet Version 4 R1 daily data at a 1 km x 1 km spatial resolution for five Daymet variables: minimum and maximum temperature, precipitation, vapor pressure, and snow water equivalent. Annual averages are provided for minimum and maximum temperature, vapor pressure, and snow water equivalent, and annual totals are provided for the precipitation variable. Each data file is provided as a single year by variable and covers the same period of record as the Daymet V4 R1 daily data. The annual climatology files are derived from the larger datasets of daily weather parameters produced on a 1 km x 1 km grid for North America (including Canada, the United States, and Mexico), Hawaii, and Puerto Rico. Separate annual files are provided for the land areas of continental North America, Hawaii, and Puerto Rico. Data are distributed in standardized Climate and Forecast (CF)-compliant netCDF (*.nc) and Cloud Optimized GeoTIFF (*.tif) file formats. In Version 4 R1, all 2020 and 2021 files (60 total) 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_annual_v4r1_2130_access.py
import earthaccess
earthaccess.login(strategy="netrc")          # free Earthdata Login

results = earthaccess.search_data(
    short_name="Daymet_Annual_V4R1_2130",
    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.