This was already in test before as some of the users on reddit reported about it but now Google has officially announced that soon you’ll be seeing a new material design (And a bit cartoony) inspired weather card in your search.
The new card will provide you more information as compared to the old one. It will tell you hourly sky conditions and chance of rain, severe weather alerts, a detailed 10-day forecast, air quality, UV index, sunrise and sunset times, and more.
You will also be able to save your favorite locations by searching for a new location and selecting “Add” and later on see those locations can be checked in the dropdown search.
Source: Inside Search