The answer is yes and no. A private pilot can fly in adverse weather conditions, but there are restrictions. Flying with IMC requires special training and experience and should only be tried by duly certified pilots. This means that if visibility is less than three miles or if the flight is completely covered by clouds, it is not legal for a private pilot to fly in these conditions.
Pilots are trained to fly in all types of weather conditions, including thunderstorms and extreme ice conditions. During IFR flight training, pilots learn to use their artificial horizon and other instruments to determine their position, heading and attitude in the air. IFR flights can be carried out both day and night, but they require special training and certification by the pilot. In the case of private pilots without instrument approval, rain and other inclement weather can reduce visibility to the point that it is no longer legal to fly.
Flying under low cloud cover is not recommended for a private pilot, as it severely limits their visibility. So I started to wonder how it is that people in Great Britain or in other countries where it rains a lot manage to complete their training. In some countries 90% of the year it rains or is it cloudy, so it seems impossible to train pilots in those countries? The above conditions applied only to private pilots, while commercial pilots have more training and experience.