Hi,<br/><br/>A.I vistited Chile once.<br/><br/>B.Reall?What's the best time of year to visit?<br/><br/>A.You can go anytime.I went in March.<br/><br/>B.What's the weather like then?<br/><br/>I have two questions:<br/><br/>Can ''when?'' replace ''What?''?<br/><br/>Why is it ''What's the weather...'' and not ''What was the weather..." although the indication is to the past ?<br/><br/>I think <i>then</i>means at <i>that time</i>here and not ''at this time".<br/><br/>Thanks.