Why does ammonia have a pKa of 32.5 at −33 °C?

According to [Wikipedia](https://en.wikipedia.org/wiki/Ammonia), ammonia has a $\mathrm{p}K\_\mathrm{a}$ of $32.5$ at $\pu{-33 °C}.$ Why does it say that? Is it a typo? Isn't anything above $12$ is a very strong base? And both bases and acids are slightly stronger at higher temperatures, not lower, correct?


