Hi Steve and WeatherCat fans,
Ours varies so much, I'd never expect two days in a row to be similar, let alone year over year.
I certainly see your point about air temperature. That case it wouldn't make sense. However, there might be other measurements where you might find usable comparisons even with your wild weather. It just occurred to me, would a graph of soil temperature compared say to the same month in the previous year be interesting? That way you could just whether the soil is warming up as fast as your previous planting season. That information might help you decide when say to purchase plants or some other logistics prior to planting.
In the fall, perhaps a graph of the number of frost days compared to the previous year might be useful in judging things like when to winterize. Given that climate seems "more variable," it might also be interesting to see if things that we have periodic done at particular times in the calender might instead need to be done earlier or later because the climatic conditions required are shifting.
Anything like that seem more appealing?
Cheers, Edouard