Gisaf can now be used to generate widgets to be embedded in other web sites. For now, there's one for rainfall.
It's very easy: just add the following in the web site (adjust the size as needed):
<iframe src='https://gis.auroville.org.in/embed/rainfall' width="300" height="150" frameborder='0'></iframe>
It's easy to generate these widgets, typically in notebooks.