The Weather Station is a special building that reduces the chances of bad weather during flights and gives you an opportunity to get useful weather-related bonuses.
The Weather Station has three upgrade levels, each of which includes three flights to different directions. When you finish the three flights three days in a row, you get a bonus. To see the properties of a bonus, press on its icon. The more consecutive flights you make, the more bonuses you get, up to a maximum of three bonuses for nine days of successive flights. If you miss a day, you lose all your progress and go back to the first day.