She's telling you the time and weather. Depending on the circumstances she will add some tips like "Put on sunscreen", "bring an umbrella" or "put on a mask to protect against pollution". First time I heard the latter one I was like "I'm living in one of these dystopian sci-fi films I love so much...".

edit: To get rid of it, just change the alarm sound. It's nothing special, just one of the options.