circular · twelve sectors · drawn over many years
each year drawn over the previous one. the wedges are not strict — the radius is the severity of what happens in that month on average, which is a number no one keeps in any honest book. fog is on the year's calendar in november; that one is reliable.
the small marks are the unaccounted weathers: the day in june that was winter, the warm afternoon in march, the storm that arrived in september and never quite left. these belong on the chart but not in any one segment; the chart of a single storm would have its own wedges.
compare with the chart of an individual day; see also the strange rain that has been going since before the building was built, and the frost that decided to stay until easter. the centre, marked the still moments, is a forecast no instrument is sensitive enough to give.