Seems to be a common issue based on reports. It's about 1am Wednesday in Manhattan but Weather app says it's Tuesday here. The source weather.com doesn't say this. Phone is up-to-date and tried deleting all added cities in Weather, deleting app, restarting phone and reinstalling app; didn't work. Settings > Date & Time > Set Automatically is on with New York as the time zone. Calendar doesn't have this issue.
iPhone 7
If you see the wrong date, time, or time zone on your device, or if it doesn't automatically adjust for daylight saving time, learn what to do.
Check your settings
See if you still need help after each step:
If you still need help
If your device still shows an incorrect date, time, or time zone,2 change each setting instead of using Set Automatically. For example, you might have iOS 9 or earlier, and your country or region, or government changes the time zone or the observance of daylight saving time. If so, follow these steps:
At least partly an issue with the Weather Channel since the iOS Weather app draws from them and the Daily tab in the Weather Channel app also suffers this issue.
None of those worked. And it's not my entire device at issue here, just the Weather app. Also, the incorrect day shows not only on the current location tab but also the tab for New York itself. See the attached screenshot: it's currently almost 3am Wednesday but it still says Tuesday.
P.S. If Apple did this intentionally as "it's Tuesday night, just a few hours after midnight of Tuesday", that's unacceptable.
Solution?
Weather app says wrong day
