勇太：うん、冬は雨が多くてとても寒いんだ。でも、夏はすずしくて、気持ちがいいよ。梅雨もないし。 マイク：え？何がないって？ごめん。 風太：ああ、「つゆ」。雨がよく降る季節のこと。本州では５月の終わり頃から7月の初めまで、雨がたくさん降るんだけど、それを「梅雨」って言うんだ。湿度が高くて、あまり気持ちのいい季節じゃないんだけど、北海道にはその梅雨がないんだ。 とはどういう意味ですか?

質問を翻訳

Here's my guess:

Yuuta: Yeah, There is a lot of rain in the winter and is very cold. But in the summer, it's cool and feels good. There's also no rainy season.
Mike: Eh?! You said there's no what?
Yuuta: Sorry. Ahh, Tsuyu. It's the season where it rains often. In Honshuu, it rains a lot from around the end of May to the beginning of July, but it's called the "Rainy Season". The humidity level is high and it isn't a season that feels good, but in Hokkaido there isn't a rainy season like that.

@cametan_001 Thanks! I have a little question. For the "それを「梅雨」って言うんだ。" part, I'm a little confused as to what the それ is referring to.

@meika Thanks! I would like to ask you the same question. For the "それを「梅雨」って言うんだ。" part, I'm a little confused as to what the それ is referring to. How would you translate it?

@cametan_001 Ahh, I see. So it literally means "that (季節) is called 梅雨)?

@cametan_001 I see! 手伝ってくれてありがとう！！！😊