The daily suggested workout feature is great but sometimes the suggestions don't make sense for local weather conditions. Today we're in the middle of a heat wave and my watch suggested doing an intense VO2 Max intervals workout. Since I didn't want to die I skipped that and just did an easy run instead.
The watch has weather data available so it ought to account for that in suggested outdoor workouts. Once the temperature passes some threshold then dial down the intensity for safety.
One of the implications of this would be that the recommendation would have to change during the day. There are plenty of hot days where VO2Max intervals are perfectly feasible for a dawn run, but would…
TrainAsOne adjusts the pace according to the weather for their training plans. You can even change the temperature adjustment interactively. So with their service it is doable. We’ll see if Garmin eventually…
One of the implications of this would be that the recommendation would have to change during the day. There are plenty of hot days where VO2Max intervals are perfectly feasible for a dawn run, but would be a nightmare at lunchtime... 
