The Weather Company's data is already fully integrated in AEP and should work seamlessly with Target:https://experienceleague.adobe.com/en/docs/experience-platform/datastreams/data-enrichment/weather
Not sure where you are sourcing your weather data from, but this may be an option:https://experienceleague.adobe.com/en/docs/experience-platform/datastreams/data-enrichment/weather