What should I wear these two days? urgent

Hometown! The weather forecast said it was over 20 degrees today, but it didn't. I'm still a little cold when I stay indoors. Now that the heating has stopped, it's cloudy outside! Tomorrow will be cloudy during the day, with showers in some areas. The wind will be second or third, and the temperature will be ten to fifteen degrees. Published by Beijing Meteorological Observatory 17.

Dress? Two clothes are almost the same! There is a long-sleeved T-shirt inside and a thin coat outside, but it may be a little cold sooner or later. You can take a later coat.