i was making the point that longitude just has zero bearings on when a plant goes into flower, thats all latitude, longitude indeed plays a serious role in when your harvest season ends though, but has absolutely no impact on when it starts. And that altitude over surrounding landscape also impacts both. Even your distance from the ocean, east and west, works differently on each side of the country thanks to the ocean currents and prevailing westerly winds you tend to have over the usa.
My harvest season start and end, where im at latitude and longitude wise + altitude, has me in the northeaster missouri, illinois, iowa kinda zone photoperiod wise. But i also dont really have twighlight hours, its dark like 30 mins after the last direct sun is on my tallest plants. Season end is just based on averages season to season though, and here the one thing you never get is the average. It tends to be wet in the fall here like the PNW too, ive just had an abnormally dry harvest season so far.
May not really look like it on a map, but latitude wise im as far noth as NorCal/Souther oregon. Damn near as far east as toronto canada lol. And i have a photoperiod like the southern mid west, just minus all the extended twighlight hours. Its just kind of all of a sudden morning, and all of a sudden night here. Tends to be how winter and summer work here too. Its just all of a sudden hot every day. then one day, all of a sudden it just gets cold and stays cold til it isnt anymore. This year has been very abnormal here though.