I am really anal when it comes to communicating about time, so, in case it's helpful for anyone else, the Japan Meterological Agency has a really convenient guide for terms referring to time (parts of th day, etc), frequency, regions (the coast, off the coast, inland, etc.) and weather (shocking, I know).
- Forecasting terminology guide overview: https://www.jma.go.jp/jma/kishou/know/yougo_hp/mokuji.html
- Time-related words: https://www.jma.go.jp/jma/kishou/know/yougo_hp/toki.html
- Weather: https://www.jma.go.jp/jma/kishou/know/yougo_hp/tenki.html
- Regional terms: https://www.jma.go.jp/jma/kishou/know/yougo_hp/chiiki.html
Take, for instance, this great chart divvying up what the times of the day are called:
Their style guide also includes terms that they DISCOURAGE the use of during forecasts, with explanations for why. Obviously, these words are still fine to use in day-to-day life, but it's nice to see explanations of why they're vague or alternative things you can say. E.g.,:
|| || |しばしば|備考|意味が曖眛なので発表文には用いない。|
by metaandpotatoes