Though this is off topic, I’m a scientist, and this is in my area.
First off, viruses aren’t alive. It’s basically software, and needs hardware (a living cell) to replicate. So the terms denatured or deactivated are typically used, but saying kill is easier for people to understand.
The coronavirus sars-cov-2 or COVID-19 has been shown to rapidly degrade at 56C which is about 130F. That’s pretty warm.
And finally, the high heat and humidity of the American south east (where I live) isn’t doing much to slow the spread based on my state’s performance (Florida).
So I’m general, I wouldn’t count on outside temps being hot enough to help anywhere that people can survive. Physical distance, handwashing, masks and limiting exposure to people are the beat way to keep stuff managed.