Hey there Bitzer74,
Thanks for reaching out to the Apple Support Communities.
If having issues with the Weather complication not working as expected on your Apple Watch, give the steps listed in the following resource a try that can help: If the Apple Watch Weather complication isn't working - Apple Support
Reset your iPhone settings
Follow these steps:
1. On your iPhone, open the Settings app, then tap Privacy & Security > Location Services.
2. Scroll down and tap Weather.
3. Under Allow Location Access, tap Never, then tap your original setting.
4. Check whether the issue is resolved.
If weather data still doesn't load, try these steps:
1. On your iPhone, open the Settings app, then tap General > Transfer or Reset iPhone.
2. Tap Reset > Reset Location & Privacy.
3. If prompted, enter your passcode and reset.
4. Check whether the issue is resolved.
If the issue persists after going through the steps above, reach out to Apple Support directly at this next link here: Get Support - Apple
We hope that's able to help.
Take care.