Internal calculations were are all done in metric, but converted to traditional US units because many of the astronauts were pilots and more used to them
Fahrenheit is, surprisingly, somewhat intuitive in the very specific case of weather.
Not that it never goes beyond the extremes of the scale, but very broadly speaking, 0-100 F is your weather range, with 0F being cold as balls and 100F being hot as balls.
The balls scale of weather temperature is significantly less intuitive.
There are people in the US who will fight tooth and nail to defend the imperial system, as if it's superior in some way. It just doesn't make sense to me. It's harder to learn, completely inconsistent, and unlike standard metric, there is no scientific basis for the measurements. They're just random distances that someone made up.
Tell me, what's easier to remember? 0°C or 32°F? 100°C or 212°F? 1000m = 1km or 5280ft = 1mi
Of all the parts of the imperial measurements, temperature is the one I'd keep, at least for weather measures. It's a human centric scale rather than scientific, so 0 is cold, 100 is hot, but both are survivable with the right cloths and an accommodating environment. If you get outside of those it starts to get particularly hazardous in either direction though and even near the ends it's 'take some heavy precautions' territory.
You mean you're blessed with non idiotic units that are easy to convert and you don't have to get out a calculator every time you need to convert between random body parts, right?