天气变化

这个星期开始下雪了和是而且天气非常寒冷.我更爱温暖的天气更多 ^__^!
"This week it started snowing and it is really cold, i like the warmer weather much more :)"

天气变化

这星期开始下雪, 和是非常寒冷.我爱温暖的天气更多 ^__^!
"This week it started snowing and it is really cold, i like the warmer weather much more :)"

Other than the correction, this is an accurate translation of your English meaning but it is too Anglicized.  The following would be more natural in Chinese.

这星期刚刚下雪而且天气非常寒冷. 我更/爱/喜欢/温暖的/天气/日子.

Note: Although "day" = 天 = 日, 日子 is NOT the same as 天子!  天子 = Son of Heaven = emperor!

天气变化

这星期开始下雪，并且天气和是非常寒冷.我更爱温暖的天气 ^__^!
"This week it started snowing and it is really cold, i like the warmer weather much more :)"

There are no "和是“in chinese.

If you want to see "and it is really cold",you can say"并且天气非常寒冷”.Taking some words out is also ok,so you can also say "非常寒冷“。

天气变化

这星期开始下雪和是非常寒冷.我爱温暖的天气更多 ^__^!
"This week it started snowing and it is really cold, i like the warmer weather much more :)"

这周开始下雪了，非常的冷。我更喜欢温暖的天气^_^!

天气变化

这星期开始下雪和是非常寒冷.我爱温暖的天气更多 ^__^!
"This week it started snowing and it is really cold, i like the warmer weather much more :)"

这星期开始下雪了，而且非常的冷，我更喜欢温暖的天气^_^!