Which magnetic field is stronger, sunny or cloudy?

The magnetic field intensity of weather is not a definite value, but is influenced by many factors, such as the earth's rotation, solar activity, the change of electron density in the atmosphere and so on. So we can't simply answer "which magnetic field is stronger in sunny or cloudy days?"

But generally speaking, when the sun is active frequently, it will lead to changes in the earth's magnetic field, thus affecting the weather and climate. In addition, the change of electron density in the atmosphere may also have a certain impact on the magnetic field. Therefore, the weather's magnetic field strength may fluctuate with the changes of solar activity and electron density in the atmosphere.

It should be noted that the relationship between magnetic field intensity and weather is not absolute, and there may be differences between weather and magnetic field in different regions and different time periods. Therefore, if you are in doubt about the relationship between weather and magnetic field, it is recommended to consult experts or institutions in related fields to obtain more accurate information.