So THAT's Why Some People Can Smell Rain Before It Falls

Published: Wednesday, January 21, 2026 at 11:46 am

Can You Smell Rain Before It Falls? Science Says Yes

Have you ever sensed a storm was coming before the first drop of rain? According to recent scientific findings, you might not be imagining things. Research suggests that some individuals possess the ability to detect the approach of rain through their sense of smell.

The phenomenon is linked to several factors. One key element is ozone, a form of oxygen found in the upper atmosphere. Storms and other weather events can bring ozone down to ground level before the rain arrives. Ozone has a distinct, fresh scent, often described as clean or similar to chlorine. Some individuals can detect ozone at incredibly low concentrations, as low as 10 parts per billion.

Another factor contributing to the pre-rain smell is humidity. Before rain falls, humidity often increases. This triggers the release of geosmin, a compound produced by Streptomyces bacteria found in the soil. During dry periods, these bacteria produce spores. When humidity returns, these spores are released into the air, and individuals with a sensitive sense of smell can detect the resulting geosmin.

This research highlights the remarkable sensitivity of the human olfactory system and its ability to detect subtle changes in the environment. While the exact mechanisms and individual sensitivities vary, the scientific evidence supports the idea that some people can indeed smell rain before it falls.

BNN's Perspective: This research is a fascinating example of how our senses can provide us with information about the world around us that we might not otherwise be aware of. It's a reminder that even seemingly simple observations, like smelling rain, can be rooted in complex scientific processes. Further research into the nuances of these olfactory abilities could lead to a better understanding of human perception and environmental awareness.

Keywords: smell rain, ozone, geosmin, humidity, Streptomyces, pre-precipitation, weather, science, human senses, olfactory system

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