Your hotel voucher should be mailed or emailed by the hotel or travel agent you book from, isn't?! If you want to print it, yes, you can find in business center in the terminal building. As to the weather, it is about 10-15 degrees on March 18. The high temperature is above 20 degrees on March 19-20, then a bit cooler, for it is predicted to be rainy on 22th. However，the report so early is not precise.