I had a hard enough time riding the cart on Sunday. The temperature was about 95 and the heat index was definitely triple-digits. Slamming water the whole way, my buddies and I were a total mess. Not sure if it was just a bad round or what, but I made more than my share of stupid plays. I wasn't hitting the ball well for sure, but dumb mental mistakes buried me.
Walking in that. Forget it.
I enjoy playing golf. Playing in high temperatures/humidity takes away some of the fun. Like playing in the rain or windy/freezing weather, if that is all that is available, I will play.
I have walked 18 when the temperature was over 100 with fairly high humidity (MI is not the desert). Sunscreen and/or sweat gets in your eyes, your glove is soaked, you are dodging from one tree to the next, guzzling water. No one else wants to play. That was pretty close to the upper limit where I would not play, just like I won't play when the ground is frozen and the temps under 32 degrees.