Is it normal?

That's why they say to weigh in around the same time everyday.

Yes very normal. Weight loss is not linear.

Your energy (calorie) balance -- that is, whether you're taking in more or less calories than you need to maintain your current weight and fuel your current activity -- is only one factor in your weight fluctuations. For most people, it's the important factor to focus on, if what you care about is your weight over the long term (months, years).

Other factors, which can have a noticeable impact in the short term (hours, days), include sodium consumption, day-to-day variations in food intake that affect glycogen storage, hormones (reproductive, stress), and muscle repair, all of which can affect the amount of water in your body; and the amount of food in your digestive tract (affected by the size of meals in the last few days; and by how quickly food is moving through your digestive tract, including extreme situations like constipation, which can be affected by how much water, fiber, and fat you're consuming). For most people, this really isn't something to focus on (unless you have health concerns related to excess water retention or you have constipation), and in most cases amount to background "noise" in your weight levels that are only important if you're trying to fit into slightly tight clothes for an event within a week or two, or trying to meet a certain weight that's a few pounds away for some sort of competition (e.g., wrestling). It's just not important for reaching and maintaining a healthy weight for the long term.

In the medium term (weeks), the short-term water-retention and food-waste factors can mask (or exaggerate) weight changes due to the difference between calories consumed and calories used.