During our heatwave here in the EU, I’ve noticed that Apple is getting more and more generous in what the temperature is supposed to be. Here it is pictured side by side with the actual, measured temperature via a Kestrel 2000.
I suspect that this is AI being its usual solicitous self, continually making it better for people asking, ‘Is it cooler on the coast?’ It ain’t, by the way, same here as it is in Paris. That’s my theory, but I’m open to all conspiratorial suggestions.
That’s a negligible difference. Also the sources might use different prediction models. The temperature on the apps is the predicted, not the actual temperature. Go to your local airport website for actual temperature readings (at that location).