YOU SAID:
Hello. What nice weather we are having today!
INTO JAPANESE
こんにちは。今日は素晴らしい天気です!
BACK INTO ENGLISH
Hello. Today is great weather!
INTO JAPANESE
こんにちは。今日はいい天気です!
BACK INTO ENGLISH
Hello. It is a good weather today!
INTO JAPANESE
こんにちは。今日はいい天気です!
BACK INTO ENGLISH
Hello. It is a good weather today!
That didn't even make that much sense in English.