Some people may feel tired during rain due to a variety of factors. One reason could be the change in atmospheric pressure that often occurs during rainy weather, which can affect some people's energy levels. Additionally, rainy weather can be accompanied by darker skies and lack of sunlight, which can lead to feelings of fatigue or lethargy in some individuals. Lastly, the sound of rain can also have a calming effect on some people, making them feel more relaxed and potentially more inclined to rest or feel tired.