Bathroom Scale vs Humidity

Cillygirl

Hi Everyone!
I have no idea what my true weight is. I weight myself on my scale (electric) and on the scale at the gym (manual) and there is about 2 to 3lbs in the difference! The gym scale tells me I'm lighter (so naturally I'm hoping it's right!) I was doing some research and I keep reading about the effects of humidity. However, I'm getting mixed reviews. It's obviously a lot more humid in my bathroom then the nicely air conditioned gym so it kind of makes sense that if humidity has an effect that my bathroom scale would read me as heavier. Does anyone know which one would be more accurate? Should I invest in a manual scale, or can anyone recommend an accurate scale?