Back in January, Google redesigned the weather card for mobile. Now the old interface is back, but it's not clear if this is a bug or Googlers realized that the redesigned card wasn't good enough.
Google's attempt to build an even more powerful web application for weather brought some new information (air quality, UV index, sunrise and sunset times), but also a few extra taps. For example, you had to tap the "10 days" tab to see the forecast for the next 10 days.
Here's a screenshot of the ill-fated redesign: