Hello,
This issue is related to people using meteotemplate in https.
BOM does not allow for cross platform calls so if want to shoe the Australian Weather Maps plugin you need to :
A) make sure you can access http://<your site url> without it redirecting/rewriting to https://<your site url>
B) instead of using #plugin(australiaWeatherMaps) i Menu setup use
"Weather Maps|http://<your site url>/plugins/australiaWeatherMaps/index.php|icons/<select your icon>"
HTH