A San Antonio allergy cleaning guide built around mountain cedar, the Ashe juniper pollen that peaks in mid January, plus the long ozone season that keeps families indoors through the hot months.
In most of the country, allergy season means spring. In San Antonio the hardest weeks for many people come in the middle of winter, when the Ashe junipers of the Hill Country release clouds of pollen locals call cedar fever. Then the hot months bring a different problem: ozone days that keep windows shut and everyone inside.
This guide explains when each season runs, where the pollen ends up in a house, and the cleaning habits that cut down what you breathe at home.
Texas A&M reports that Ashe juniper, the tree everyone here calls mountain cedar, usually starts producing pollen in mid December. The release peaks in mid January and tapers off toward the beginning of March. Texas A&M notes the pollen is especially irritating in the Hill Country west of Interstate 35, where the junipers grow mixed with oaks, and that describes much of the land from the northwest side of San Antonio out through Helotes, Fair Oaks Ranch and Boerne.
The weather keeps people moving through it. January normals at the airport are a high of 63.3 degrees and a low of 41.0, with only about 14 nights a year at or below freezing. Mild afternoons mean doors and patios get used, kids play outside and dogs come in carrying pollen in their coats.
Juniper pollen is fine and light. It comes in on clothes, hair and pets, through door gaps and through the air system, and it lands wherever the air slows down.
Texas A&M's advice for high pollen days starts with keeping windows and doors closed, and it notes that a clean, new air filter is better at removing pollen from the air. Put a new filter in before mid December and plan another for mid January, when the peak hits. Finer pleated filters catch more, as long as your system is built for them.
From there the routine is simple: damp dust instead of dry dusting, so pollen is picked up rather than thrown back into the air. Vacuum with a sealed, filtered machine. Wash bedding and pillowcases in hot water often, and brush pets outdoors before they come in. Leave shoes and coats near the door.
Weekly cleaning during these weeks makes a real difference for allergy sufferers. When TotalCare Cleaning comes to San Antonio, a Recurring House Clean will dust reachable baseboards and blind slats on every visit, and a deep clean after cedar season wipes ceiling fans, light fixtures and vents in place. See the recurring cleaning guide.
The San Antonio Metropolitan Health District counts ozone season from March through November, when hot, sunny days push ozone levels higher. On those days many families limit time outdoors, so homes stay sealed with the air conditioning running.
That combination matters for allergies too. About 122 days a year reach 90 degrees or more, and a sealed house recirculates its own dust, pet dander and whatever pollen got in. Change the filter on schedule through the hot months, dust supply vents and fans regularly, and vacuum upholstery where pets sleep.
The yard plays a part. The city's mosquito surveillance runs from March through October and asks residents to avoid standing water. Empty pet bowls, saucers and buckets outside, which also cuts down on muddy paws.
Once the junipers taper off toward early March, a top to bottom clean removes the pollen that settled in all the places a weekly visit cannot reach. Wash the inside of the windows and the screens, clean outdoor furniture and porch lights, launder curtains and wipe the tops of cabinets and shelves. The seasonal cleaning calendar puts this into the rest of the San Antonio year.
The questions San Antonio homeowners ask most often about this topic, answered plainly.
TotalCare Cleaning will service San Antonio and surrounding areas with background-checked cleaners and is insured up to $1 million. Re-clean guarantee: if we missed something, tell us by the end of the next day and we come back to fix it. Beyond Clean. TotalCare.
