Because the 'current' weather isn't, it'll be whatever the last update of your chosen weather station reported. Often people choose a generic station that can b

Because the 'current' weather isn't, it'll be whatever the last update of your chosen weather station reported. Often people choose a generic station that can be quite far from where they actually are - my default if I allow weather sites to 'guess' tends to be the airport 14 km away and 200m higher than me. A lot of weather can pass me by and still not have gotten to the airport in the 40 minutes since the last update.