How do you say

We have our holiday itinerary for next month all figured out.

..in Chinese?

我们已经计划好下个月一起去旅行了。

wǒ men yǐ jīng jì huà hǎo xià gè yuè yì qǐ qù lǚ xíng le 。

How do you say "There will be a stretch of one to two months of cold and dry weather in Beijing." in Chinese?