Slightly related. I regret not having taken a screenshot to prove it, but oh well. A friend and I both open google.com and type weather. We are on the same Wifi, both using chrome, both signed in, and we each get our very own current temperature for the exact same city. Different by a few degrees that is. We hard refresh, we sign out, we clear cookies, still different on each machine.
With personalisation I wonder if they go as far as telling you how hot it feels for me as opposed to how hot it is.
I'd be more inclined to believe your queries were just handled by different servers that had cached different sets of data. Seems more likely if you had different DNS settings than your friend, too.
With personalisation I wonder if they go as far as telling you how hot it feels for me as opposed to how hot it is.