If you’ve been seeing two dashes instead of today’s temperature on your Apple Watch Weather complication, Apple has two solutions to try.
If the complication can’t display a temperature, it shows the dashes rather than, say, whatever the last-known temperature was. The dashes may be irritating, but anything else would be inaccurate.
The problem is that sometimes, it doesn’t stop doing that. Even after you’ve got to where there is a good internet service, once it’s gone to the dashes, it may not come back.
After this, your Apple Watch complication should show the correct weather temperature. And the Weather app will show more details, again now correctly.