It is, but so is humidity. Too high of humidity has caused me more issues than temperature over the years. I do use an external thermostat on my cheap incubator so my temperature is pretty constant (as long as not one turns it off).@cheezenkwackers wow that's amazing, gives me hope thank you !
I guess I'm more worried than I might be because I hatched out some Pekin Bantam chicks last year in a poor quality incubator I bought online and the temperature wasn't quite right. Only 3 of 12 hatched and those 3 were deformed and died within days. So I realised how important the temperature is to a good hatch....