That would be one consideration ... the weather and temperatures in the areas they will be as they might need different clothing packed. Though wouldn't that be part of the fun to experience "snow"? I'm sure if your child does not have the proper clothing, the host family will not let them freeze!
You mentioned that this portion is a home-stay, so I wouldn't be factoring into it the tourism options. A home-stay usually means to experience life of the other ... and chances are the family includes a mate about the same age and interests. Host families are notorious for taking good care of their charges ... and finding lots to do and giving lots of experiences beyond the tourism realm ... and often far better ones!!!
