Check the current weather stats for the Bemidji area below or double click on it to change the location. Check the humidity and temperature in the room your piano is in, then visit the Dampp Chaser menu site to help determine if you need a climate control system. Humidity and temperature variations are the biggest influences in piano pitch variations. Ideal humidity for your piano is 42%, (+-)3%. 72 degrees is an ideal temperature. The outside temperature and humidity drive the indoors temperature and humidity. Don't allow you piano to get too dry or damp! Major damage can occur.