My FH & I just booked our venue (which we are very excited about) for 5/26/18 (ETA: Sat of MDW). The reception will be in the beautiful barn -- which is not climate-controlled but has big doors and windows to open for a breeze (it is on a huge hill with a good cross-breeze) and they have portable A/C units, as well.
One of my potential Bridesmaids just told me that she got her dates mixed up - she will be at her best friend's wedding in Europe on 5/26. Unfortunately, however, the only other date option we have is 6/16. We are worried that mid-June could be much hotter than 5/26 and therefore potentially risking it being uncomfortable for our guests. It could also end up being the same temperature, or even nicer, on 6/16 though. 6/16 is also Father's Day weekend and the day after my FBIL's 30th birthday. We don't know what to do. On the one hand - it devastates me to think of my wedding day without her. But I don't want to make our other 179 guests suffer (heat, etc) for one person