In Anchorage we had some of the warmest weather on record, and very dry conditions. Good weather for hiking but at 70 def F (21 deg C) quite warm for most of us particularly the dogs. Dogs can't sweat, the dog I walk begins to pant really fast for a real long time.

For dogs you can get a 'cool coat' a wrap around that you can keep wet or my friends keep in the fridge.

Humidity can be a killer, 'cause the human body plan to sweat doesn't work so well when perspiration can't do its thing.

Anchorage used to be bone dry and you rarely had cause to sweat anyway, but in this warmer weather there has been a bit of uncharacteristic moisture in the air. Meanwhile over the past week we've had lower temps and above average rain.

SRS's OP about limiting one's cooling range to the 'warmest possible' cool is spot on. Your body has a temperature range for wherever you live, and you want to gently ease your comfort rather than going super cold and confusing your body and wasting a lot of energy.