title: Xarray (from grib file) to dataset
body: <p>I have a grib file containing monthly precipitation and temperature from 1989 to 2018 (extracted from ERA5-Land).</p>
  <p>I need to have those data in a dataset format with 6 column : longitude, latitude, ID of the cell/point in the grib file, date, temperature and precipitation.</p>
  <p>I first imported the file using cfgrib. Here is what contains the xdata list after importation:</p>
  <pre><code>import cfgrib
  
  grib_data = cfgrib.open_datasets('\era5land_extract.grib')
  
  grib_data
  Out[6]: 
  [&lt;xarray.Dataset&gt;
   Dimensions:     (latitude: 781, longitude: 761, time: 372)
   Coordinates:
       number      int32 0
     * time        (time) datetime64[ns] 1989-01-01 1989-02-01 ... 2019-12-01
       step        timedelta64[ns] 1 days
       surface     float64 0.0
     * latitude    (latitude) float64 42.0 41.9 41.8 41.7 ... -35.8 -35.9 -36.0
     * longitude   (longitude) float64 -21.0 -20.9 -20.8 -20.7 ... 54.8 54.9 55.0
       valid_time  (time) datetime64[ns] ...
   Data variables:
       t2m         (time, latitude, longitude) float32 ...
   Attributes:
       GRIB_edition:            1
       GRIB_centre:             ecmf
       GRIB_centreDescription:  European Centre for Medium-Range Weather Forecasts
       GRIB_subCentre:          0
       Conventions:             CF-1.7
       institution:             European Centre for Medium-Range Weather Forecasts,
   &lt;xarray.Dataset&gt;
   Dimensions:     (latitude: 781, longitude: 761, time: 156)
   Coordinates:
       number      int32 0
     * time        (time) datetime64[ns] 1989-01-01 1989-02-01 ... 2001-12-01
       step        timedelta64[ns] 1 days
       surface     float64 0.0
     * latitude    (latitude) float64 42.0 41.9 41.8 41.7 ... -35.8 -35.9 -36.0
     * longitude   (longitude) float64 -21.0 -20.9 -20.8 -20.7 ... 54.8 54.9 55.0
       valid_time  (time) datetime64[ns] ...
   Data variables:
       tp          (time, latitude, longitude) float32 ...
   Attributes:
       GRIB_edition:            1
       GRIB_centre:             ecmf
       GRIB_centreDescription:  European Centre for Medium-Range Weather Forecasts
       GRIB_subCentre:          0
       Conventions:             CF-1.7
       institution:             European Centre for Medium-Range Weather Forecasts,
   &lt;xarray.Dataset&gt;
   Dimensions:     (latitude: 781, longitude: 761, time: 216)
   Coordinates:
       number      int32 0
     * time        (time) datetime64[ns] 2002-01-01 2002-02-01 ... 2019-12-01
       step        timedelta64[ns] 1 days
       surface     float64 0.0
     * latitude    (latitude) float64 42.0 41.9 41.8 41.7 ... -35.8 -35.9 -36.0
     * longitude   (longitude) float64 -21.0 -20.9 -20.8 -20.7 ... 54.8 54.9 55.0
       valid_time  (time) datetime64[ns] ...
   Data variables:
       tp          (time, latitude, longitude) float32 ...
   Attributes:
       GRIB_edition:            1
       GRIB_centre:             ecmf
       GRIB_centreDescription:  European Centre for Medium-Range Weather Forecasts
       GRIB_subCentre:          0
       Conventions:             CF-1.7
       institution:             European Centre for Medium-Range Weather Forecasts]
  </code></pre>
  <p>So the temperature variable is called &quot;t2m&quot; and the precipitation variable &quot;tp&quot;.
  Temperature variable is split in two xarrays but I don't understand why.</p>
  <p>How can I obtain the needed dataset from this please ?</p>
  <p>It's the first time I'm dealing with such data, and I'm really lost on how to proceed.</p>