To discover new Weather and Phenomenon, there is no need to make an investigation with Maps or Quests. If you meet certain conditions in particular locations and at specific time periods, you always have a chance to see the spectacular phenomenon of nature!
Once you discover the Weather or Phenomenon, you should report it to Robert Boyle at Oxford College so that you will receive a special reward.
Here is the list of hints which help you make new Weather and Phenomenon discoveries.
[Updated on July 14th, 2021]