We got a nice dry -49c earlier this week in my little town in the arctic. I was just fine. Last time I went down south to visit my brother, I thought I would die with the humid -25c. In summer, I think life is great at a dry +25c and I will want to die if you add some humidity to that +25c. Humidity makes any weather worst. There is no way around it.
But as a friend from Congo once told me, it's easier to adjust to the cold because you can always add an extra layer. In intense heat, you don't get that kind of luxury.