There's actually a lot of advice that suggests weighing either daily or monthly is a better way to track your weight, and that weekly is the worst.
Weighing daily, you observe the fluctuations and can rationalise that every time the scale moves isn't a reflection of fat loss/gain, and can track patterns and it takes the stigma out of the scales.
Weighing monthly, you're taking in a longer length of time and scale movement can more reliably be attributed to fat loss/gain as any fluctuations over this time will most likely have evened themselves out.
Personally, I weigh daily when eating/training for fat loss, and take an average of my weight over the course of a week, and track my progress using that figure week on week. So I'll see the day-to-day fluctuations, observe them but not fret over them and also start to notice patterns with them.
With Weighing weekly in the like of slimming World and weight watchers, I simply would eat on weigh in day, then binge after class and the next day or two, then over restrict the rest of the week to compensate before weigh in day again. That's disordered eating caused by the scale. I also could have had 2lb of bloat on weigh in day thinking I'd put weight on, only for it drop off the next day but I'd miss it because I didn't weigh daily. Logic would tell me I didn't put on or lose 2lb overnight, but if I'd only weighed weekly, I could easily believe I'd put on 2lb in a week, and end up over restricting myself unnecessarily.
I also found weighing monthly useful when I was trying to loose the last stubborn 4lbs, as it was the hardest to lose and I found it quite demoralising not seeing the scales move at all, so tried something call 30 days head down, when I would set myself a step range target, a calorie target range and weekly workout target range (my range was based on bare minimum (ie bad day acceptable level) to optimum level (ie fantastic day level) , and as long as I stayed within those range targets, at the end of each month I would notice the scales move. Whereas weekly, it was looking like no progress was being made.
Personally now I like weighing weekly for maintenance because I like noticing patterns in my body (that are useful for more than jusy my weight!), it keeps me away from my scale fear I had before, it keeps me accountable on a daily basis and keeps me away from.over restrictive eating patterns, and structures a healthful daily routine that incorporates eating well, moving well and generally just taking care of my self and my overall wellbeing.