The soothing sound of raindrops tapping on windows may be a melody for some, but for allergy sufferers, it can signal the onset of unwelcome symptoms. As the rain pours down, so do potential triggers for allergies, exacerbating the discomfort for many. In this blog post, we’ll explore the connection between rain and allergies, shedding light on how weather patterns can impact our respiratory well-being.

Rain, Mould, and Allergies:

One of the key culprits behind worsening allergies during rainy weather is mould. Mould spores thrive in damp environments, and rain creates an ideal breeding ground for their proliferation. As rainwater permeates outdoor and indoor spaces, mould spores become airborne, posing a significant challenge for individuals with mould allergies.

Increased Pollen Levels:

Contrary to the belief that rain helps clear the air, it can have the opposite effect on pollen allergy sufferers. Rainfall can lead to an uptick in pollen levels as it encourages plant growth. While the rain may temporarily wash away some pollen, it also provides a conducive environment for plants to release more pollen once the rain subsides, intensifying allergic reactions.

What is the prevalence of Allergies in Australia:

Allergies are a prevalent health concern in Australia, affecting a substantial portion of the population. According to the Australian Institute of Health and Welfare (AIHW), allergic conditions, including hay fever and allergic rhinitis, are common, with millions of Australians experiencing symptoms such as sneezing, itchy eyes, and congestion1.

What Can I do to help with my allergies in the wet?

While rain can pose challenges for allergy sufferers, there are steps that individuals can take to minimize the impact:

  1. Stay Informed: Monitor weather forecasts, particularly pollen counts and mould spore levels, to anticipate days when allergy triggers might be heightened.
  2. Limit Outdoor Exposure: On days with high pollen or mould levels, consider reducing outdoor activities. If you need to be outside, wearing sunglasses and a hat can help minimize exposure to allergens.
  3. Maintain Indoor Air Quality: Keep indoor spaces well-ventilated and use air purifiers to filter out airborne allergens. Regular cleaning and mould prevention measures are essential, especially in damp areas.
  4. Consult a Healthcare Professional: If allergies persist or worsen during rainy seasons, seeking advice from a healthcare professional is advisable. They can provide personalized recommendations and may suggest allergy testing to identify specific triggers.


The correlation between rain and worsening allergies underscores the need for proactive measures, especially for those susceptible to mould and pollen. Stay informed and reach out to your doctor if needed.

Learn More about:  Allergy Testing

Sources: Australian Institute of Health and Welfare. (2021). “Allergic conditions.”