How do you say

The weather in Beijing has been fluctuating wildly between hot and cold in the past two months.

..in Chinese?

北京这两月天气变化无常,时冷时热的。

běi jīng zhè liǎng yuè tiān qì biàn huà wú cháng , shí lěng shí rè de 。

How do you say "I've been collecting recipes online, and I'm planning to make pan-seared duck breast from the Precision Kitchen next month." in Chinese?