I think your little girl will be fine, if you can cool it to 87 thats great we seem to be around 88 at best. Just keep doing what you are doing...it's all we can with weather like this!
Someone has posted on here, regarding another issue, that beardies are able to deal with the odd temporary temp/humidity change. If they were out in the wild they would cope with the weather by hiding so don't worry.
Yes definately keep
bathing daily to help with the
hydration. Jade loves his 20minute baths lately lol. Do you have water in the viv that she can have if she is
thirsty? Does your beardie seem unhappy at all? What I have been doing is letting jade out as soon as I get home but most of the time when I get back he seems quite happy basking, only a couple of times has he been hiding in the coolest spot.
I completely understand your worries, I have them too despite everything I am doing to get his temps right. If any other ideas come to mind let me know, and keep me posted.