I can understand your problems with high heat ridding. Your just not used to it. 105°F degree riding around central Texas is not unusual. The problems are getting water, air circulation, and sun protection during your ride. Loose cotton clothing, light weight long sleeves and pants, gloves, hat with neck protection. Ya gotta dress like your going to go pick in the fields. And ya gotta drink water like a summer time roofer.
Of course you know this.
Now try to get me ridding when the temps less than 50°F... No Way!!! Ha...
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No matter where you're at... There you are... Δf:=f(1/2)-f(-1/2)