Is 3 degrees to 1 degree suitable for fishing?

Suitable for fishing. It is best to fish when the temperature difference between day and night is less than 6 degrees. 1~3 degrees seems cold, which is not good for fishing, but some fish are not afraid of cold and still eat hooks at 0 degrees. They are afraid that the temperature difference will make the water temperature unstable and make them feel uncomfortable. The temperature difference of 2 degrees can be ignored and will not cause the change of water temperature at all. The water temperature is stable and suitable for fishing.