Easy fix to raise temperature is to raise the light a bit and increase intensity. It’s ok to let the temp get up to 84-86F in veg the last hour or two before lights off to help maintain a higher temperature after lights off for those few hours.

Why do you think it will get PM? PM is an environmental issue. Are you not able to control the environment? With a proper environment and air circulation there is no reason to believe you’ll have any micro-climates around a plant. Defoliate the large fan leaves if you want more light and air flow through the interior of the plant.

Another world… another time…