Pest Seasons in Southern California

Pest Control Cockroach Exterminator


Learn more about seasonal activity for Southern California pests and rodents from the expert pest controllers at Versa-Tech Pest Management below.

In San Dimas and Los Angeles County, California, it is always ‘pest season.’ Living in a location where it does not freeze or even get below 40 degrees makes it ideal for pest activity all year around. Just as humans love to live in Mediterranean climates, pests do as well. The more humid the climate, the more insect activity. For California, we only have two basic seasons, summer and winter. Summer is considered insect season with a rise in ants, spiders, and American Roaches. Winter will see a rise in rodent activity.


From roof rats and mice invading your Los Angeles County attic space to rodents scurrying through your home and crawl space, rodent activity and harborage can increase for a variety of reasons.


California Rodents are mammals just like humans. They want to be warm in the winter and cool in the summer. Starting about mid-October, as daylight starts to become shorter and shorter, the Los Angeles County rats and mice will start looking for a cozy winter shelter. After spending a nice summer climbing and feeding in and out of fruit trees, spending some nights outside in thickets like bougainvillea or ivy patches, rodents want to hunker down as the air chills. Rats and mice will begin to explore for more ‘interior’ areas to spend the winter. You can have the same individual rodent season after season. However, there are several threats to a rodent, and the average rodent’s life span is only 12-18 months. Rodent activity can increase for a variety of reasons such as: breeding, familiarity, good food sources, concealment and scent tracking. Attics and crawl spaces are the most popular residential locations for rodents to harbor. Insulation materials make perfect nesting locations. Some other common areas include but are not limited to, under bathtubs, inside wall voids, and under cabinet areas. During the fall and winter months rodent sounds can be heard and they consist of, scratching and/or squeaking. More regular sightings will occur as the rodents prepare for winter season. Do not ignore interior rodent activity or let it get out of control. Rodents have the potential to do some serious damage to our homes. If they are active long enough, they can damage utility areas and items and cause a serious health concern. Although, rodents are more active inside in the winter, they do not go away in the summer. Rodent activity can be found all year around.


Are you seeing an increase in ants and American Roaches in your home? There’s a reason for that. Insects tend to move when it’s hot. The hotter and more humid, the more the insects like to get around. It is mostly for pleasure but also for water location and hydration. It takes a lot of water to satisfy an ant colony of 10,000 to millions of ants. A common question is “why do I have ants all over my kitchen and bathroom sinks?” This is because of the water and/or toothpaste. A minimum recommendation would be a one-time ant elimination service where the any colony is eliminated and there is an extended ant control for the season. Another popular spot for ant activity can be found at an exterior hose for ants to set up inside of when it gets hot. Also, decaying fruit and other similar things on the ground will attract ants. The heat also changes habitats for insects like Los Angeles County American Roaches. American Roaches like to live in sewer or drainage areas and in moist planter beds. In wintertime, these areas stay a temperate climate, warmer and humid. As the air dries and the temperature heats up, the areas where American Roaches like to live in winter becomes dry and cooler, making the climate outside or above them, more attractive. This is when American roaches will be seen coming out of storm drains, coming up through floor drains, and utility sink areas and flying outside. A regular quarterly service is best for American roach control.



Spiders are another insect that loves the hotter weather. California Spider season is considered to be September through October, but the uptick starts at about the end of May to June in Southern California. Spider webs and egg sacks are the first signs of spider activity. Cellar spiders aka Daddy Long Legs, Black Widows, and Brown Widows are the most common spiders found around a Los Angeles or Orange County home. While Spiders are amazingly beneficial, they also need controlled. Regular service is best, and the frequency of service is the biggest factor in controlling spiders. Frequency of service are determined based on the use of the area and other exterior factors.


Although bed bugs can be found any time of the year, they tend to show increased activity during the warmer months, which has led to summer being commonly referred to as “bed bug season.”

Bed Bugs Pest Control San Dimas

Do you have a Los Angeles County or Northern Orange County, California pest infestation or rodent problem? Call the Pros at Versa-Tech PM today!

San Dimas-based pest control company Versa-Tech Pest Management provides full service professional pest control and pest management for homes and businesses, including targeted ants, bed bugs, rodents, roaches, spiders, birds and more pest treatments as well as general monthly, bi-monthly and quarterly pest service plans in San Dimas, Covina, West Covina, Glendora, Anaheim, Pasadena, Burbank, Los Angeles County & Northern Orange County. Free Estimates & Inspections.

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