Travel to Taiwan on mid July or mid Dec.

Oh, it is during the typhoon season in mid Jul. which may more or less influence your trip. Therefore, I strongly recommend you to travel in Dec. when the weather condition can be more pleasant. The average temperature shall be 16-18 degrees. It may shower sometimes, but will stop soon. I suggest you prepare long-sleeved shirt, jacket and jeans, as well as light sweater for your baby. Simple rain gear is also needed.

Hi Nathalie, thank you for your prompt reply and advice. How about travel in the Oct and Nov month ?

Yes, the end of October and November are ok for you to tour around. There may have fewer rainy days. And the climate will still be warm and comfortable. Have a nice journey!