I think everything is relative.. as to where you live.
During July and August in the South with 90 to 100+ degrees riding I became concerned when stopped in a traffic jam or slow going through a construction zone (and yes they have the crews out in force during the summer).
I watched the temp gauge creep up, could hear the fan going and then it was a toss up as to which would happen first
1. The bike would reach the red zone and have to be pulled over and let cool
2. The battery would be drained from the discharge
3. I'd run out of gas by keeping the revs up to charge the battery to keep the fan going to try and cool the bike.
So... I've done the following..
First I used Water wetter in the coolant to help cool the bike. This helped.
Then I switched to Engine Ice coolant and this also helped. Comparible with water wetter, I think one or the other is fine.
I have a volt meter onthe bike so I can keep an eye on the discharge if stuck in traffic. AND.. I have an 8 gallon auxillary tank in the sidecar so as long as I'm fueled up I can wait out the worse traffic stoppers. (if nothing's moving I just shut down and polish the bike while I wait.