25% increase in tire pressure during the day (above max)

as a point of reference on my truck, running LRE tires, 65psi cold, I commonly see a 10-15F rise in pressure on a hot day.

On my trailer, running LRE tires set at 75psi, 90-95psi on a hot day and an internal temperature of 130F is very common.

In neither case am I running very close to the max load rating, well below it.

so, while the OP temp rise %wise is higher than what I see, it doesn't seem out of reason, especially if he/she is running near max load rating on the tires.