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This article that I just came across does a nice job at explaining some of the nuances of solar noon https://www.timeanddate.com/astronomy/solar-noon.html .

The time of year does matter a bit, but the effect is smaller than the effect of timezones. Their equation of time article includes a nice graph of the variations in time of solar noon at Greenwich. https://www.timeanddate.com/astronomy/equation-of-time.html

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> This article that I just came across does a nice job at explaining some of the nuances of solar noon https://www.timeanddate.com/astronomy/solar-noon.html .

And a related thing, the analemma - the sun's position at the same place on earth at solar noon over the course of a year doesn't resemble an arc, it's a figure-8: https://en.wikipedia.org/wiki/Analemma

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