What does the 2 temperatures mean in the Weather app

I've found that this happens because of the delay introduced by the network and retrieving the temperature for your location.

Many things have to happen to show you the temperatures. I see this same thing on my iPhone but I think it's more noticeable on the Watch because you're staring at it, waiting for the data. You can be looking at the old data while the app gets the latest updates and then the numbers will change as the new data rolls in.

In addition, some apps, such as Weather Underground, take an extremely long time to do their updates. I've even given-up using some weather apps because of this delay.

The wind speed unit is determined by your region settings. Depending on your original region you have to change from your region to a similar region using km/h instead of mi/h.

Example: changing the region from UK to Ireland will change the unit from miles per hour to kilometers per hour in Weather.app.

Changing the region settings is not restricted to Weather.app but will change things in all apps!

I will refrain from making jokes about proud Britons forced to use the Irish region settings to get a metric unit!

Edit: found a reasonable solution for the UK: English > Gibraltar apparently also uses km/h instead of mi/h (at least in iOS7) ;-)