I cannot comment regarding BP's specifically but, mammals has external testicles to keep sperm temp's lower than body temp's. Full body temperature(or overly hot hot-tubs/sauna's) can temproraily render a male mammalian sterile or reduce their fertility.
Snakes, lizards and, even warm-blooded birds etc do not share this physiology with mammals which would lead me to believe that they are less susceptible to temperature induced sterility. i.e. it would take a bigger change to negatively affect them. Otherwise we would see cool or hot years result in disproportionately small hatches in wild populations.
If you aren't far off the needs of the snake you likely shouldn't encounter problems.
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