Humidity control is probably equally or perhaps more important than temperature control. In something like 2006 or 2007, I cracked a Rob Allen fingerboard a bit because the whole house humidifier wasn't working. That being said, I try to avoid ebony fingerboards on basses. Once I took control of humidity, I found myself adjusting truss rods almost never once things have settled.
Dryness and fluctuations can kill a lot of guitars and basses over time.
In the South and Midwest there have been some huge fluctuations since mid February. In February, it went from -2 F to nearly 70 in just a few days. In the last two weeks, we have gone from a last snowfall to 85.