I have a 30,000-gallon in-ground w/ a Hayward pump (SP2607X10). It's driven by a 1HP A.O Smith motor that runs on 220V. The pump is on a timer that runs 12h/day; 8 a.m. to 8 p.m. A Hayward sand filter (S-240) w/ 300# of new sand is also used and normal system pressure at the multivalve is ~24psi. (FWIW, the pool equipment is in the shade.)

This motor (and similar motors of this type) has an overload protection cutout (breaker) which trips when the motor overheats. No surprise there. In "normal usage" however, this motor will cut out several times a day. When I say "several times a day", I really mean in recent days on the East coast where we've been having 90-degree temps w/ 90% humidity. Once the pump cuts off, it usually cools down in 15-20 minutes, and then cycles back on.

I have seen days when the temps are modest in which I don't recall the pump motor cutting out at all.

My basic question: Is this cycling during an especially hot day "normal", or is there something to be worried about?