Part of macOS
weatherdApple app service
○ Leave it
Keeps one of Apple’s apps or widgets up to date.
What it is
Fetches data for apps and widgets such as Weather, News, Maps, Books and Shazam.
If you stop it
macOS starts it again straight away. Leave it.
The verdict
○ Leave it. Part of macOS, or something that starts again by itself. You never need to close these.
In Activity Monitor
weatherdnewsdtipsdshazamdshazameventsdsportsdstickersdvoicememodmapssyncdmapspushdnavdbookassetdbookdatastoredfinanced
From Procession’s guide, in the words the app shows.