Do wooden storm windows need weep holes

I live in Colorado, where it can go from 70F and sunny to 20F and snowing in a day. I have metal-clad wood windows in my house--not a problem. Wood window manufacturers try to use wood that minimizes movement. Aluminum has a larger linear coefficient of thermal expansion than wood (12.3 versus 3.0), so I don't believe aluminum would handle temperature variation any better than wood. Perhaps the contractor is worried about other climate effects. I wouldn't do wood that isn't clad in Colorado, for instance, because you would have to refinish it every year--our sun is brutal to wood products. Good windows are built in a manner to handle temperature fluctuations. Perhaps your climate is very extreme and I just don't know your local building requirements, but the contractor's reasoning sounds a little strange to me.

Single glazing with storm windows absorbs sound reasonably well, I would not expect a huge decrease in sound level with triple glazing, but certainly not an increase. Single glazing alone is another story, it's sound absorption is terrible.

The increased sound is certainly due to the frames and adjacent construction. While there is often a correlation between thermal loss and sound transmission, sound is much trickier to manage well. It is sometimes counter intuitive. The construction joints must be carefully detailed. The general concept is to avoid any solid connection between inner and outer surfaces. Any connections should be via resilient, absorbent materials. Typically, you want to fill any voids with sound insulation, though in some cases this has been worse than a simple air gap.

Also consider exterior sound attenuators. Walls, fences, trellises, large shrubs, trees, berms all will help attenuate sound, but when you consider cost vs. benefits, such measures need to be carefully considered.