Meaning of 梅雨 in Japanese

天気予報によれば、まもなく梅雨に入るそうだ。
According to the weather forecast, the rainy season will set in before long.

もうすぐ梅雨入りだ。
The rainy season is near at hand.

うっとうしい梅雨期に、すっきりしない話で恐縮ですが、少しの間お付き合いください。
I'm ashamed to tell such a muddled story in this dreary, rainy season, but please bear with me for a while.

今年は梅雨明けが遅かった。
The end of the rainy season came late this year.

明日から梅雨前線が活発になります。
The seasonal rain front is moving in tomorrow.

梅雨時でもないんだから、傘は要らないんじゃない。
Since it's not the rainy season, there's no need for an umbrella.