Yes, you do have to take weather into account, I guess I've become accustomed to having the "feel for the weather" automatically work it's way into the observations, mine's dropped an inch in 2 weeks which is also abnormal for around here, but we've also had low humidity, continuous wind and higher than normal temps - somehow, I "calculate" all that in when visually checking the pool and really think nothing of it.
However, topping the pool up daily sounds excessive, even for high heat, low humidity and windy scenarios, every 2-3 days maybe...
The bucket test will tell for sure.