Update the weather information on your Galaxy watch
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When you're unsure what the daily forecast is going to be, you can check the current forecast with the Weather app on your Galaxy watch. However, if the weather information on your watch isn’t updating, or if you want to change additional options like the unit of measurement, you can adjust some of the settings in the Galaxy Wearable app. iPhone users can use the Galaxy Watch iOS app instead.
Other answers that might help
Contact Samsung Support
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