At least in wOS3 beta 4 you can tap the centre of the temperature wheel thingy to see the next 10 days.
I prefer to use Carrot Weather third party app. Among other things it's complications are better than Apple's weather app's complications. Carrot allows you to configure the complication, so that you can choose between temp, temp+condition, wind, precip chance and so on. Apple's weather app has different complications for temp and condition (but no others) meaning that if you want both, you have to use two complication slots.