Adding OpenWeatherMap WMS layer using PyQGIS?

I would like to add in QGIS real time weather data.

I found this link and this link and I tried to follow the example, but without any success.

I've added a WMS weather data layer for precipitation to the QGIS map, as follows:

First, the parameters for the service:

service = 'crs=EPSG:900913&dpiMode=7&featureCount=10&format=image/png&layers=precipitation&styles=&url=http://wms.openweathermap.org/service'

Next, create the raster layer, specifying WMS as the type:

rlayer = QgsRasterLayer(service, "precip", "wms")

Finally, add the precipitation layer to the map:

QgsMapLayerRegistry.instance().addMapLayers([rlayer])

the example didn't show any error in the code and no data was added to the weather layer either, I'm not sure why?