help me to translate this to english
Karena hari yang mendung tidak selalu berarti akan hujan
Ketika hari cerah tidak selalu berarti tidak akan hujan

Maybe so?
When the cloudy day did not necessarily mean that it will rain.
When a sunny day, it doesn't necessarily mean that it will not rain.

When is cloudy day, it doesn't mean it will rain.
When is sunny day, it doesn't mean it won't rain.