Generally, "weather data" is active almost instantly once I fire up my Garmin Edge 1030 and pair it with my smartphone. But the last two rides, as you can see from my indicators at the bottom left, GPS, Phone and Internet are all good. But weather is not available. Both times, weather came on-line about 15 mins into my ride. Strange that this has happened the last two rides... like something has changed. Not a big deal, since in both cases weather did start working relatively soon. Just FYI I guess.
