According to an article on Quora, "At What Temperature Do Viruses Die?" ¹, for what it's worth:

> All [known] strains of virus can be inactivated at 70 °C.

For reference, an autoclave used for sterilization is around 121 °C.

> A minimum temperature range to inactivate most virus is 48°C to 60°C. Some virus still able to survive at temperature below 60°C e.g. adenoviruses(dsDNA naked virus) relatively thermostable, it able to withstand temperature at 56°C for 10min.

¹ https://www.quora.com/At-what-temperature-do-viruses-die-1

Viruses exist where there is life, it's not a mound I'm willing to die on, but it's accurate here on Earth. There is life that lives in temperatures higher than 70 °C, therefore there are viruses that can survive in temperatures higher than 70 °C: http://www.rcn.montana.edu/Publications/Pdf/2005/4_18Young.p...

Thank you, I stand corrected! Please everyone disregard my previous comment and find a more reliable source of facts.

There can be some or many kinds of viruses that survive under all sorts of conditions, by that doesn't necessarily imply that a particular virus does so as well.

The question was of any virus not a particular virus.

I imagine viruses from underwater volcanic plumes would be pretty heat tolerant. But I don't know if they are a danger to humans or if we are too cold to host them.

How hot is high heat? There are viruses that infect archaea that live in extreme conditions including near-boiling water.