I believe it would not be a problem if you DON'T have opposite side of the street parking or if your gut feeling tells you that the cover WON'T get stolen. When in doubt call the local precinct.13BRAVO said:
IMHO letting your car sit for over a month would not be beneficial to your car. I would ask a close family member or a good friend to do you a favor and watch your X, just for the peace of mind.