City have not a weather ID.
There are no cities with weather ID settings in Reunion.
Weatherandtime.net gives you the opportunity to host the weather and time widgets Cilaos on your site, as well as other Reunioncities.
The procedure for obtaining the code is very simple. Click on the "Get widget", select a country and city, as well as additional design elements, Get the code to paste on your site.
Get weather widget for Cilaos.
Cilaos weather forecast for 15 days. Today's weather in Cilaos,Reunion.