Weather data is extremely unreliable, even after the fact. In most cases it’s interpolated from the nearest weather station, and even over close distances it can be completely different. You also have to ensure that whatever service is using the actual nearest station, not just the most accessible.
At the moment I’m working in an island in northern Vietnam. The nearest actual weather station is the Hai Phong airport, but I can select Hai Phong or Ha Long City as my location on the better services. The two weather reports are very different, and if you dig into the data you find that the Ha Long City weather is interpolated from Hai Phong Airport data, and even the Hai Phong City and Hai Phong Airport data is slightly different as one is actual data and the other is modified data. Both of them are completely wrong for where I am, just a few tens of kilometers away.
Where I physically am can have the difference between thundering rainstorms and heavy wind that drive everything into hiding and bright, calm sun in just a kilometer or two. Indeed, depending on the time of year I can predict certain weather changes to within a couple hundred meters when I’m driving back and forth.
To make matters worse, most of the weather data apps and websites use for my area actually come from Hanoi which is used as the “Northern Vietnam” base for predictions, despite being in a wildly different type of environment than much of the rest of northern Vietnam and has weather totally unlike everywhere else.
This is a common type of problem and is even worse in may areas.
I’d absolutely fight against any automated addition of such data as it would be nearly impossible to have it accurate for the specific location of your observation.
However, if you want to add what you actually see and experience during the observation that would be excellent additional data and far more accurate than an automated system. That said, a certain level of consistency and rigor would need to be applied: is if foggy, or low overcast? What about mist vs fog? Where is the line between rain and drizzle, etc. Those sorts of things can be important distinctions, especially when it comes to insects.