Hi iuliia164,
It sounds like you're having an issue with the Weather showing correctly on your Apple Watch. If so, on your paired iPhone navigate to Settings > Privacy & Security > Location Services > Weather and test toggling this off or set to 'never' then restart your devices and turn the feature back on to test.
If the issue continues, try retting your location services using the steps below found in the article here: About privacy and Location Services in iOS, iPadOS, and watchOS - Apple Support
"If you would like to reset all of your Location Services settings to the factory default, go to Settings > General > Transfer or Reset [device], tap Reset, then tap Reset Location & Privacy. When your location and privacy settings are reset, apps will stop using your location until you grant them permission.
Settings > Privacy & Security > Location Services.
"
If the issue remains after the reset, reach out to Apple Support directly to report the issue and further assist.
Get Support
Best.