"It's cool and comfortable today!"

他にもいくつか言い方あるよん Here are some variations.

"It's nice and cool today!"

"It's cool and I feel good today!"

"It's cooler today, so easy to be alive!"

最後のは半分冗談。 The last one is a half joke.

というのも、 Guess what,

オーストラリアでホームステイしてたとき、 when I stayed with a host family in Australia,

ホストファミリー父がよく冗談で聞いてきたんよぉ、 my host father would often tease me by asking

"Still alive?" 「生きてた？」って。

なので俺は言ったんだぁ So I said to him,

"I'm live. Live Kenji!"(Kenji is my real name.) 「ボクは生よ。生ケンジ！」（ケンジは俺の本名。）

どこのアホ日本人ボーイやねん。 Who was this stupid Japanese boy?

そうゆー落ちでした。 That was the punch line.

ごめん、最後ちょっと話し作った To tell you the truth, I just made up the last part.