As we are entering into the season of cold weather, I have attached a link below which outlines the importance of maintaining the correct moisture content in the solid wood environment. The colder the temperature gets outside, the dryer the air gets as the frigid air outside decreases the moisture levels in the environment. Also, the more heat that is running inside tends to create a dryer environment. As mentioned in the following article, the relative humidity should be retained at 30% – 50% to avoid complications.
If you do not have a moisture meter, I would recommend you purchase one.