So as an announcer, the good thing is that there is no day 'typical' to another. Some may be exciting with visiting celebrities for promotions/outdoor broadcasts for sales, events etc while others where one has to hunt for stories. I did evening shows mostly, where the check-in/ report time was 2 hours ahead of show start for producer/ station manager briefing, content integration, show planning, production and execution, music mapping, star/ celebrity interviews (if scheduled, the report time could advance to up to 4 hrs ahead of show for editing interview bytes before airing or sometimes interview the guest outdoors at their filming/ studio location and bring in the raw audio in time for cleaning and editing/ on-air review). And of course coffee-breaks included in all this activity!
My show was a 4/5 hour U-turn (or evening drive-time show) with content more streamlined towards movies, entertainment, light-hearted/ fun news and games compared to the heavy content laden morning shows where listeners are more inclined to city/ national news and business. Some days are such where there is no content needed as they are sales-driven where an entire hour or two are dedicated to the sales content and the show audio is an OB (Outdoor Broadcast).
There are also many days recently, where one hour is dedicated to listener music choice where we take phone calls/ prescreen listeners, play a little musical game and later air the clean recordings.
Traffic/ weather news are also played 2/3 times every hour and I have to co-ordinate them with local govt authorities for accurate information.
So, in short, there is a lot of activity packed in those hours, and the 'typical' day can be 8 hrs(4/5 hours for the show and the rest goes in planning/ debriefing) and more, if we decide to go out and party after the show (which we often always did) ;)