Normal. It can happen for various reasons, sometimes due to features you turn on, sometimes for other unknown reasons.
If you're showing energy display (%) for your range, you can rule out temperature changes for the most part as the cause. (Temperature fluctuations resulting in available energy loss (or gain) don't typically affect the displayed %. They only affect the displayed rated miles. This is because the definition of 100% is changing with temperature...)
I lost 22 or 24 miles of range in the parking garage overnight just the other day. No obvious reason for it. Most days it is closer to 3-4 miles of loss per day.