Some rumor that the player at the carillon keyboard's heart 'dost not announce the weather but governs it', or that in fact some Archmage or Administrator hides secret tunnels running from The Hand to the tower's apex.
There are no doors or windows on the Clocktower until it reaches thirty stories high. Perhaps its entrance is underground, or hidden by some spell. Some suggest the carillon player simply levitates up to the windows, shrouded in fog, invisible, or shapeshifted into a pigeon. Even darker rumors suggest that the Clocktower is in constant temporal malaise, that the player had never left and is still playing the same tune since the tower's creation - that all the shifts in weather are but quick notes slowed down by the time flux.
Investigators of the Clocktower often return preternaturally aged and speak of a lifetime of adventures within the tower, lost to wandering time and space. For most, this is enough confirmation of the Bureau's jurisdiction within the Tower.
The weather and timekeeping in Wizard City follows a strict pattern.
Every Week is 10 Days.
Every Day is 10 Hours.
Every Hour is 100 Minutes.
Every Minute is a 100 Seconds.
1 Week = 10 Days = 100 Hours = 10,000 Minutes = 100,000 Seconds
1 Work Shift = 5 Hours
And every Day has distinct and dramatic weather patterns (see table below), that follow a sequential order. Mayday will follow Stormday will follow Sunday and so on. If you need to randomly know what day is it, roll a d10.
Wizard City Weather
*This includes many of the mutant creatures which spawn and die during Sunday. Muuuutaaaant Ghooooooosts!
(Yes, this is copy/pasted from my Weather-Locked post.)