The polar _atmosphere_ is colder than expected[1]. According to Wikipedia, the coldest point on the surface is 380 degrees C.
https://sci.esa.int/web/venus-express/-/57735-venus-express-...
https://sci.esa.int/web/venus-express/-/57735-venus-express-...
In Kelvin we see it's about 1.5x as hot.
Or if you look at distance from "comfy" (25 C) to "dead" it's about 3x as far as dead from comfy so the conclusion still works .
Boiling point depends on atmospheric pressure. On Venus (93 bar) melting point is about 0C [1] and it boils at 305.6C. Interestingly under pressure "water becomes less polar and behaves more like an organic solvent such as methanol or ethanol" [2].