When the highest temperature goes under 10 degrees Celsius  I consider it a very cold day. The highest temperature is 8 Celsius degree in Tokyo today.
So, it’s pretty cold for me.
Luckily, however, my office is always warm enough. Thus, I’m comfortable during working time.
I finally wrote up an article about plants at the office and posted on the company’s blog.
Phalanx Press   観葉植物、実はオフィスワーカーの意外な味方 
In the beginning, I give a simple quiz about what kind of tree they are. At the end, I explain how plants have a good influence on productivity and happiness for office workers.
Finishing a task made me feel good.
So, I’m pretty good.