How can I say this in Japanese

How can I say

He told me that the weather was cold in Tokyo
How can I say “oh really? Put on some warmer clothes so you don’t catch a cold. It’s a lot warmer now in Sweden.”

本当? 厚着して風邪引かないでね。スウェーデンは今とても暖かいです。
Hontou? Atsugi shite Kaze hikanaide ne. Sweden wa ima totemo atatakai desu.

But, read my last answer first.
https://www.japan-guide.com/forum/quereadisplay.html?0+161316

really really ????

Put on some warmer clothes so you don’t catch a cold.
暖かい服をきたら、風邪をひかないよ。