A vehicle in which only gets driven in immaculate weather.
A vehicle in which the owner originally buys for a Nice, Summer car but will not drive in; rain, snow, heavy wind, mist, foggy days, etc.
"Hey man! How come I haven't seen your 'daily driver' Audi lately?"
"It looks like its supposed to rain today even though the forecast shows nothing."
"Oh! So its a weekly driver, not a daily. You drive a daily, everyday."