A North Texas pool has four seasons of work and no month off. Freeze protection runs December through February, the spring ramp-up March through May, chemistry June through September, and leaves and freeze prep October and November. Doing each job in the right month is most of what separates an easy pool from a running argument, and each month below names the mistake people make in it.
Our calendar differs from the one on the back of a chlorine bucket because the climate swings so far. The National Weather Service’s Dallas/Fort Worth climate narrative calls it “humid subtropical with hot summers” and adds that “it is also continental, characterized by a wide annual temperature range,” so every season here brings its own work. A pool in Minnesota gets covered in September and uncovered in May; ours circulates in February.
Our winter is intermittently cold rather than cold, which is worse for equipment. A pool that freezes solid for three months is a known problem with a known solution. A pool that sits at 55 degrees for six weeks and then drops into the teens overnight is the problem that splits pipe, and it’s the North Texas problem.
The year in one table
Everything below assumes a normal residential pool in Plano, Frisco, McKinney, Allen, or the surrounding Metroplex, running year round with no cover.
| Month | Typical water | The job that matters | The failure it prevents |
|---|---|---|---|
| January | Upper 40s to low 50s | Freeze protection | Split plumbing |
| February | Low 50s | Freeze audit and filter clean | A May emergency |
| March | Upper 50s to 60s | Back to weekly chemistry | An April green pool |
| April | 60s to low 70s | Pollen and storm response | Chlorine collapse |
| May | Mid to upper 70s | Equipment check before the heat | Peak season failure |
| June | Low 80s | Routine and water level | A hidden leak |
| July | Mid 80s | Hold chlorine at the top of range | Algae bloom |
| August | Upper 80s to low 90s | Twice-weekly testing | A full recovery |
| September | Low 80s falling | Repairs and CYA correction | Next summer’s bills |
| October | 70s | Leaf removal | Clogged equipment and stains |
| November | 60s | Freeze prep and testing | First-freeze damage |
| December | 50s | Water level and circulation | A dry, still, frozen pad |
January: protect the equipment, ignore the water
January water sits in the 40s and low 50s. Almost nothing grows down there, chlorine demand is at its floor for the year, and the water will look after itself for weeks at a time. Everything that matters in January is at the equipment pad.
- Set freeze protection properly and test it once. The February 2021 event, 139 consecutive hours at or below freezing at DFW Airport, is the benchmark. Manufacturers set these above freezing: Pentair engages near 36 degrees and Hayward defaults to 38, so treat the high 30s as the trigger point.
- Keep the water level up. A skimmer that drops below its throat during a freeze pulls air and loses prime, which is how a pump ends up dry and the plumbing ends up still.
- Check chlorine every two weeks rather than weekly. It will barely move. Hold the low end of your range instead of the top.
The January mistake
Turning the pump off to save electricity during a cold snap. Moving water is the entire freeze defense on a North Texas pool, and the night you switch it off to save two dollars is the night that costs a plumbing repair. Our freeze protection guide covers the sequence, including what to do when the power goes out.
February: the freeze audit, then the first look at spring
February can hold our coldest snap and our first warm week. Early February is still January. Late February is where spring startup begins, and starting it early is the cheapest advantage on this calendar.
- After every hard freeze, walk the pad in daylight and look for wet concrete, a hairline split along a pipe, a cracked pump lid, or a filter housing weeping at its clamp band. Freeze damage frequently doesn’t leak until the system is pressurized again.
- Pull and clean the filter before the season, so it starts March able to cope with pollen.
- Test calcium hardness and cyanuric acid (CYA, sold as stabilizer), the two numbers that climb over time. February is when a partial water exchange is comfortable to do, because few people want to swim yet.
The February mistake
Waiting until the water is warm to look at the equipment. A cracked pipe found in February is a scheduled repair. The same crack found in May is an emergency in the middle of the spring rush.
March: the month the year is decided
Water crosses 60 degrees somewhere in March, and that’s the number that matters. Below it, algae is effectively dormant. Above it, algae reproduces, and every week of casual chemistry you got away with in January starts compounding.
- Go back to weekly testing and weekly brushing. This is the single highest-value change on the whole calendar.
- Raise the pump schedule from winter hours toward a full daily turnover.
- Get the chemistry balanced rather than approximately balanced, in the order alkalinity, pH, calcium, stabilizer, chlorine. Our water chemistry guide has the targets and the reason for that order.
The March mistake
Treating March like February. Most green pools we recover in April were fine in March and still on a January schedule. Spring pool startup covers the job step by step.
April: pollen, storms, and the first swim
In April, oak pollen falls in sheets, spring storms drop several inches at a time, and the first warm weekend brings the first swimmers. All three consume chlorine, in water that is cold to swim in and warm enough to grow things.
- Skim daily during pollen drop if you can. Pollen that sinks is organic load your chlorine has to deal with.
- After every storm, empty the baskets, brush, then test. Heavy rain dilutes chlorine and stabilizer and drops pH.
- Before the first swim, confirm free chlorine against your cyanuric acid level rather than against a strip color, and check that the barrier and gate still latch after a winter of ground movement.
The April mistake
Reading a chlorine number without reading the stabilizer number beside it. A pool holding 3 ppm of chlorine at 90 ppm of cyanuric acid isn’t sanitized, and April is when that quietly stops being theoretical. Why chlorine reads fine and the pool goes green explains the ratio.
May: the real start of the season
In May, the pool gets used properly for the first time and spring storms are still active. It is the month the pool stops being a maintenance object and starts being a thing your family is in.
- Get the equipment inspected before the heat arrives, not after something fails in it.
- Check the heater now if you have one, because you’ll want it in October.
- Verify the automatic cleaner covers the floor rather than one favorite corner.
The May mistake
Booking service after the first hot week. Most pool companies in the Metroplex fill their routes between mid-April and Memorial Day. The month you can get on a schedule easily is February.
June: settle into the routine that will carry the summer
In June, air temperatures reach the 90s and the pool begins consuming chlorine in earnest. June is the month to build the habit that August will test.
- Twice-weekly testing from here until September.
- Watch the water level: evaporation is now roughly half an inch a day.
- Check local watering and fill rules before topping off from a hose, especially in a drought year.
The June mistake
Trusting an autofill to watch the water level for you. An autofill hides a leak perfectly. If your water bill jumps in June, run the bucket test before you accept the number.
July: chemistry, not cleaning
July brings relentless UV and heavy use. Chlorine consumption is at or near its annual peak, and the pool isn’t dirty so much as it is chemically hungry.
- Hold the top of your chlorine range, not the middle.
- Shock at dusk. Anything added in the afternoon is partly destroyed before it works.
- Watch filter pressure, which climbs faster in summer.
The July mistake
Sanitizing the July pool on the June dose. Nothing looks wrong until the day it does.
August: the hardest month of the year
August water can reach the low 90s in an unshaded pool and stay there. In our experience chlorine demand can roughly double against a mild June week, algae reproduces fastest, and the equipment pad has the least thermal headroom it will have all year.
- Test twice a week without exception, and dose for six days out rather than for today.
- Buy turnover with longer hours at a lower pump speed rather than the same hours flat out.
- Deal with the afternoon thunderstorm the same evening it lands, not the next weekend.
The August mistake
Going on vacation with a floater full of tablets and no plan. What changes above 100 degrees covers the August routine in full.
September: the reprieve, and the month to fix things
Heat breaks somewhere in September and demand eases. It is the best repair window of the year: parts are available, technicians are free, and nothing is urgent.
- Do the repairs you deferred in July.
- Bring cyanuric acid back down if a summer of tablets pushed it up.
- Clean the filter properly before leaf season rather than after it.
The September mistake
Relaxing the routine before the water has cooled. Mid-September water is still summer water.
October: leaf season, which is our real fall problem
North Texas leaf drop is late, compressed, and heavy. Post oak and pecan put a large share of the year’s debris in the water in four weeks, and all of it consumes chlorine and clogs something. Live oaks wait until late February.
- Empty skimmer and pump baskets every day or two during peak drop.
- Get leaves off the floor before they break down and stain plaster.
- Consider a leaf canister in the vacuum line for the four weeks. A skimmer sock blinds over in hours during a heavy drop.
- The month in full is in leaf season in North Texas.
The October mistake
Letting a packed skimmer basket sit for a week. It starves the pump, which costs you circulation and shortens the pump’s life.
November: winterize the equipment, not the pool
Our first real freeze usually lands in November, and the pad needs to be ready for a hard night with little notice.
- Set and test freeze protection before you need it.
- Insulate exposed plumbing and the pump, and know where your shutoffs are in the dark.
- Finish leaf cleanup and get the filter clean going into winter.
The November mistake
Finding out on the night of the first hard freeze that the freeze protection isn’t configured. Test it in daylight in November while the stakes are zero.
December: light work, high stakes
December brings minimal chemical demand and the least attractive weather to walk outside and look at a pool. The work is small and the consequence of skipping it isn’t.
- Keep the water level at mid-skimmer.
- Confirm the pump runs when it’s told to, on the coldest night of the month.
- Test every two weeks, hold a low chlorine residual, and leave it alone otherwise.
The December mistake
Canceling service for the winter to save four months of fees. Winter service is cheap insurance against a freeze repair, and the pool that is dropped in December is the pool that needs a recovery in March. Weekly versus biweekly covers where the real interval risk sits.
What this looks like if you would rather not do it
Every job above is achievable by a homeowner with a test kit and a Saturday. The hard part is doing the right one in the right week, twelve months running. The week that matters most is in March: most of the expensive problems we get called about in April and May were preventable then, when few owners are looking at their pool. Keeping that rhythm is most of what a service plan buys.
We run weekly service year round rather than seasonally, because the two months where the water needs least are the two months where the equipment needs most. Pricing is published on that page, we cover Plano, Frisco, McKinney, and Allen among others, and you can cancel anytime.
