这么这边也很热，到处都是很亮堂堂的

这么这边也很热 => 我们这边也很热

I said "Because it's winter in Australia now, it's very cold here." Chinese often puts two conjunctions in front of two clauses whereas in English we'd put one in front of one ex. We'd say "Because A, B", or "A, so B"; but in Chinese they often say "Because A, so B" (which is incorrect in English). There are lots of sentence structures like that, but the one here (因为。。。, 所以。。。") means "Because..., so...". You can omit '因为', but I think that's more informal or at least less academic. I'm not a native speaker, so it's possible I've made mistakes.

因为现在在澳洲是冬天， 所以这里的天气很冷。

你们的天气是好吗？=> 你们那的天气好吗？