Summer rain brings relief and wellbeing

We had a proper downpour of rain last night. The first time in a month, maybe longer. The sort of downpour that lasts long enough to penetrate the ground. To form puddles. That the plants in the garden might feel like they've had a bit of a drink after weeks of hot dry weather.

I stood in the doorway and watched the rain, grateful for it, knowing how desperately it is needed and it might not last long. And breathed in the earthy smell the ground gives off during and after rain. This familiar scent we all know here in the UK has a name: petrichor.

Curious about this phenomenon, I discovered that scientific and anecdotal research supports the idea that petrichor genuinely offers wellbeing benefits. According to the much missed Dr Michael Mosley, the scent arises from plant-derived oils and a compound called geosmin, produced by bacteria in dry soil. Raindrops hitting the ground aerosolise these compounds, releasing them into the air, along with ozone after thunderstorms.

Studies show that exposure to geosmin-rich petrichor can increase serotonin, reduce C-reactive protein (an inflammation marker linked to depression), and promote alpha brainwave activity—all signs of relaxation and improved mood. According to a Verywell Health article, rain itself—through negative ions, rhythm of water, scent, and cooler air—can ease stress, improve focus, and even boost sleep quality.

So at a time when farmers, gardeners and plenty of others are wishing for rain, remember it's not just the land that gets nourished. We do too