怪…的【guài … de】

怪 + adjective + 的 means "rather, pretty, quite". It is spoken, and it usually carries a feeling: sympathy, mild embarrassment, surprise at how much something is so.

A verb of feeling can take the same frame, with its object inside it.

Both halves stay

怪 and 的 come as a pair. Without 的 the sentence sounds cut off.

• × 今天怪冷 → 今天怪冷的
• × 怪冷的天气 → 很冷的天气

怪…的 is a comment at the end of a sentence; it doesn't go in front of a noun, so the second line needs an ordinary 很.

Other words with 怪

怪不得 means "no wonder", and 怪 alone as a verb means "to blame": 别怪他 is "don't blame him". Neither has 的 at the end.