In the Oklahoma City area, mosquito season runs from March through October, and most of it is packed into four months: June through September carried 72% of the year's completed mosquito treatment visits. August was the single busiest month, with about one visit in five. Those figures come from counting completed service visits in the Oklahoma City area over the 12 months from October 2025 through September 2026.
Quick answer
Mosquito season in the Oklahoma City area runs from March through October. In the 12 months to September 2026, June through September held 72% of all completed mosquito treatment visits, August was the busiest single month, and no mosquito visits were completed in November, December or January.
Dealing with this right now?
Mosquito season in the metro runs March through October. If your yard is already a problem, Acenitec can take a look and set up treatments for the months that matter.
See how our mosquito control service works around the OKC metro.
Winter is a true off season
Of 308 completed mosquito treatment visits in the Oklahoma City area over the year, none fell in November, December or January, and one fell in February. Oklahoma winters shut the season down completely, which is not true of every Southern metro we looked at.
The work restarted in March, slowly. March held 3.9% of the year's mosquito visits, April 5.5% and May 7.5%. Visits then roughly doubled in June, when the share jumped to 14.6%.
June through September is the core of the season
June, July, August and September together accounted for 221 of the 308 mosquito visits, or 71.8%. August was the peak at 20.8% of the year, and September stayed almost as busy at 19.8%.
October still carried 11.0% of the year's visits. For a homeowner, that means the late part of the season matters more than the spring: a yard that gets no attention after Labor Day misses more than a quarter of the year's mosquito activity, as measured by when treatments were done.
| Month | Share of mosquito visits | Share of flea, tick and chigger visits |
|---|---|---|
| January | 0% | 0% |
| February | Under 1% | 0% |
| March | 3.9% | 11.6% |
| April | 5.5% | 8.1% |
| May | 7.5% | 10.5% |
| June | 14.6% | 14.0% |
| July | 16.6% | 13.4% |
| August | 20.8% | 12.9% |
| September | 19.8% | 10.8% |
| October | 11.0% | 18.3% |
| November | 0% | Under 1% |
| December | 0% | Under 1% |
Chiggers, fleas and ticks start three months earlier
Yard treatments for fleas, ticks and chiggers follow a different calendar. In March, these visits already made up 11.6% of their year (43 of 372), while mosquito visits were at 3.9%. Mosquito work did not pass 40 visits in a month until June.
From March on, flea, tick and chigger visits held steady, between 8% and 15% of the year in every month from March through September, with October the busiest month at 18.3%. November through February together held just 2 of the 372 visits.
The practical point: if you walk tall grass or have pets that roam the yard, spring is when the outdoor biting season starts in Oklahoma City, well before mosquitoes are a nightly problem.
Summer heat brings bugs back between visits
Mosquitoes are not the only summer pressure. For regular general pest service, we counted how often a customer needed a return visit between scheduled treatments because insects came back.
From June through August, there were 6.9 of those callbacks for every 100 routine pest visits (58 callbacks against 843 visits). From November through March, the rate was 2.6 per 100 (39 against 1,493). The callback rate more than doubles in the hot months, so the weeks between treatments are when most surprises happen.
How we counted
The sample is 13,648 completed service visits in the Oklahoma City area from October 1, 2025 through September 30, 2026, at 3,024 homes and businesses. Only visits marked completed were counted; cancelled and rescheduled appointments were left out.
Each visit was grouped by the service performed: mosquito treatments, flea, tick and chigger yard treatments, routine general pest service, and callback visits between scheduled pest treatments. A month's share is that month's visits divided by the year's total for the same service. Service records for this area are complete only from mid-2025, so this page uses one full year rather than a longer window.
Visit counts reflect when treatments were done, which follows when people want relief, so they are a measure of pest season as homeowners experience it, not a trap count. We do not publish a figure for any city, ZIP code or group of months with fewer than 30 visits behind it.
If mosquitoes or chiggers are already a problem in your yard, call (405) 342-0190 and a technician can walk the property with you.