World Clock Deluxe lets you quickly show the weather in the cities you have associated to your clocks.
Choose View > Clocks.
Select one or more clocks in the list.
To select clocks that are next to each other (contiguous) in the list, press the Shift key and then click the first and last clock; to select clocks that are not next to each other in the list, press the Command key and then click each clock; to select all the clocks, choose Edit > Select All.
Choose Show Weather from the Action pop-up menu (looks like a gear) at the bottom of the list.
Shift-Control-click any clock in the palette and choose a city or All Cities from the pop-up menu.