From which solar term will it be warm after winter (take off your cotton-padded jacket)

It depends on where you are. Generally speaking, the weather is not very warm in early spring. I'm in Inner Mongolia, and I'm about to have a fright. It's the vernal equinox. In addition, those solar terms are set according to the climate in the middle and lower reaches of the Yellow River, so you can compare them according to your position. In addition, the Yellow River has changed its course many times (it seems to be 26 times). I don't know where the solar terms of the Yellow River come from. Anyway, according to Shandong, the deviation should be small.