The sensation of feeling hot or experiencing increased temperature before rain is a phenomenon commonly observed and often referred to as "pre-rain heat." While there isn't a single definitive explanation for this phenomenon, it can be attributed to a combination of factors related to weather patterns and atmospheric conditions.
One possible reason is the presence of high humidity in the air before rainfall. When the atmosphere becomes humid, it affects the way our bodies perceive temperature. Humidity interferes with the evaporation of sweat from our skin, which is the body's natural cooling mechanism. As a result, we may feel hotter and uncomfortable even when the actual air temperature is not exceptionally high.
In addition to humidity, the pre-rain heat can also be associated with changes in atmospheric pressure. Before a rainstorm, there may be a drop in barometric pressure in the atmosphere. Some people are sensitive to these changes, and their bodies might react by experiencing sensations of warmth or discomfort.
Furthermore, the approaching rain is often accompanied by cloud cover. Clouds can act as a barrier, preventing the sun's direct rays from reaching the Earth's surface. However, they can also trap heat, creating a localized warming effect known as the greenhouse effect. This can contribute to a sense of warmth before rain.
It's important to note that these explanations are not universally applicable and may vary depending on the specific weather conditions and geographical location. The pre-rain heat phenomenon is a complex interplay of various atmospheric factors, and scientists continue to study and explore the mechanisms behind it.