Reporting
Strictly, most of the things
Strictly, most of the things we associate with Spring are neither astronomical nor meteorological, but biological - more specifically botanical (such as flowers appearing) and zoological (such as birds nesting). Of course, these are influenced by the weather but they are not determined by it in any short time period. When the weather doesn't correspond to our ordinary understand of a season we say the season is early or late or didn't happen at all that year. That is how humans, as against robots, think about the world around them.