Common Pests that Come out During Rainy Season

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The rainy season makes it the perfect reason for some of us to stay in bed and enjoy the rest of the day, doing nothing (literally). But, for some reason, the rainy season also calls for pests to invade our homes and cause a range of issues for us to solve.

With Singapore’s temperate weather, the rainy season usually comes from October to December. It may even last until February, depending on the climate.

That said, given the abundance of food and warm shelter, it’s no surprise that pests would seek refuge under our roofs to survive as well as to breed. If you’re curious about what are some of the common pests that come out during the rainy season, continue to read on.

Types of pests that invade homes during rainy season

You see, common household pests such as mosquitoes, ants, roaches, and rats often come out during the rainy season. But, that’s not all. Other pests such as spiders, lizards, and bedbugs can also invade your home. Ahead, we’re sharing why some of these pests are potentially harmful to you and your family.


They may be small but they’re known as one of the deadliest animals on earth. Female mosquitoes rely on stagnant water to be able to reproduce and the rainy season provides just that. One way for you to reduce the risks of contracting mosquito-borne diseases is to discard all stagnant waters in every place you see.

Common ants

During the rainy season, common ants lose their habitats due to the overflow of water, forcing them to seek refuge in your home. With the abundance of food in your home, especially the kitchen, it becomes a gold mine for the ants to feed on. If you want to prevent the entire colony from invading your kitchen, make sure to pack all your food in containers and wipe any food debris off the surface.


Similar to common ants, roaches may start invading your home during the rainy season in search of food, water, and warmth. One way for you to prevent an infestation is to be proactive in maintaining your house’s condition. Fix any leaks, store your food in containers, take out the trash daily, and seal any gaps or cracks that roaches can use to enter your house.


A common enemy for Singaporean households, rats are highly adaptive and resourceful. Like the ants and roaches, rats seek new shelters during the rainy season. However, they can cause structural damages and severe health hazards to humankind. To prevent rat infestation in your home, make sure to take the necessary measures such as covering the gaps in and around your home, repair holes or tears in window or door screens, and de-clutter some of the things in and around your house.

Are these disease-carrying pests?

Mosquitoes, roaches, and rats are known to spread deadly diseases while ants aren’t as significant. However, they do carry and transmit bacterial and fungal organisms that may contain serious disease pathogens.

How to avoid these pests infestations during rainy season?

It all boils down to how attentive you are to your home’s condition and its surroundings. If you notice some gaps and cracks in the walls of your house, chances are that you need to seal them up immediately to prevent pest infestation.

Not only that, but you also need to maintain the highest level of hygiene in your home so that these pests don’t stand a chance to seek refuge in your house. So, take out the trash daily and always wash the dishes after every meal.

Aside from maintaining your house, you may want to engage professional pest control services from PestBusters to reduce the chances of pest infestation and exterminate them wholly from your home.

Our Integrated Pest Management plan begins with preliminary inspections of the affected area to identify pest species and exploit their weaknesses, in addition to establishing food sources used to sustain the infestation.

After gaining sufficient information on the problem, we formulate a strategy and strike with full force to disorientate the pests and ensure they’re unable to regroup. We will follow up with inspections to ensure all remaining infestations are eliminated.

So, do not wait too long to contact us as you may prolong the chance of pest infestation in and around your house. Contact us at General Hotline: (+65) 6288 2828, 24-hour Assistance Hotline: (+65) 9180 9990 or enquire online today for the total pest control services!