Here’s Why Your iPhone’s Weather App Is Wrong So Often – SlashGear

Weather is ever changing, and no one can truly know how it will behave from one day to the next. And even if you wake up to a beautiful 72-degree high, in many cases, it’s still possible for outside temperatures to fall well short.

Weather forecasts are actually created based on simulation models, which use historical data to predict temperature and humidity, precipitation, wind patterns, and microclimate changes. What’s more, not all meteorologists use the same models or interpret data the same way, which is why you can see conflicting weather reports from different sources.

In iPhone’s case, it mostly pulls from The Weather Channel for North America. According to a report from Forecast Watch that tracked weather accuracy from 2017 through 2020, The Weather Channel was found to have the most accurate reporting of any national meteorological survey. But it also aggregates data from other sources, too, so the data it presents may not always match up with what you’d find in the actual Weather Channel app.