What Happens If It Rains in Kitchener After Pest Control?

You have taken an appointment for the pest control treatment next week, but there is a prediction of rain in the coming days. You have no idea what you should do. Get your property treated or not? If it rains, how long is the treatment going to be effective after the rain? These are the questions that you might ask yourself.

Well, if you have gotten the treatment and it rains, the insecticide and pesticide treatment would get diluted and not very effective after the precipitation. However, the amount of dilution depends on two factors: the amount of rainfall and the product used.

To be honest, it is difficult to give a single response that would identify if the pest control is going to work after the rain or not.

Let’s get into the details of what happens to the pest control treatment after the rain.

Why it’s difficult to keep insecticide after rainfall

Whenever farmers spray pesticides, they do it on those days when the weather is perfect. Why do they do that? Weather plays an important role. If the weather is windy, most of the pesticide will blow away the moment it gets sprayed.

On the other hand, rain would dilute the efficacy of the treatment, and you’d have to reapply the pesticide. The potency of the pesticide and insecticide decreases with each rainfall. If it rains every other day, then the homeowners or the farmers must reapply it again and again.

However, there is an exception, there is one pesticide called the lawn granule pellets, and it works best when it gets the water and gets activated by the water.

Most of the time, the insecticides used by the homeowners are for the elimination of the pest rather than repelling it. For instance, the farmers would most probably use the insecticide to protect the crop, while the homeowners would use it to get rid of the pests.

The good news is you shouldn’t worry too much about the rain when you have applied the insecticides because it works very fast to eliminate the pests.

Contact the Manufacturer

If you perform the treatment by yourself, you should read the label at the back. Does it mention anywhere that it is ‘rainproof?’ They might mention it on the label. But for the safe side, you should always apply the pesticide when it is a nice day, and there is no forecast for rain in the upcoming days. If you can get in touch with the manufacturer or supplier of the product, they would guide you very well.


Now you know whether you should apply pesticide when it is going to rain or not. To sum up, using the insecticide on a perfect day when there is no rain prediction would be the best as the rain dilutes the insecticide, which reduces the effectiveness. Secondly, if the wind is blowing, then it could blow away the insecticides. It all depends on whether you are spraying outside your house or inside. Contact us if you have any more questions, and we would be happy to answer them.

Waheed Ahmed, CEO of Pesticon Pest Control

Written by: Waheed Ahmed Founder & CEO, Pesticon Pest Control

For over 18 years, Waheed has provided customers with the best pest control services in the Greater Toronto Area. The longevity of Pesticon is due to his philosophy of genuinely caring for his customers and putting them first. It's this kind of passion that has won him the HomeStars Award over 9 years in a row. 

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