I'm not sure since I have never dealt with that temperature.....we consider it HOT when it is 80ºF
What does your long range forecast say? Usually the weather changes at the full moon (May 14 )
Is you introduce moisture to the seeds and they start to germinate and then dry completely out, you may loose them. You sow them, water well and cover with plastic to keep the moisture in. Once sprouted, they should be ok