When to Pressure Wash in Round Rock, TX: Month-by-Month Calendar

The short answer: when to pressure wash in Round Rock

The best time of year to pressure wash in Round Rock is late October through mid-November. Summer algae and mildew have shown up, the heat has broken, and you finish before cedar pollen starts in mid-December. The second-best window is mid to late May, after the oak and pecan pollen has mostly dropped and before the 100F afternoons arrive.

Avoid washing the siding in the middle of cedar season (roughly mid-December to mid-February) if you want it to look clean for more than a few days. Avoid hot afternoons in July and August, when cleaning solution dries before it can work. And never wash a roof that just took hail. If a deadline is driving you (an HOA letter, a listing, a repaint), skip the calendar and use the “by trigger” section below.

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What ruins a pressure wash in Central Texas?

Generic advice says “spring or fall.” In Round Rock, three local conditions decide whether the money you spend still looks good two weeks later.

1. Pollen timing

Ashe juniper (mountain cedar) pollen runs roughly from mid-December to mid-February and usually peaks around mid-January. Cold fronts with dry wind trigger the big releases, and rain knocks the counts down. Oak pollen starts in March, peaks around April and fades in May. Pecan pollen commonly follows in late April into early May. Dates shift with the weather every year, so treat these as typical windows, not guarantees.

Pollen is a thin yellow-tan film. It is mostly cosmetic and a hose will take some of it off. The real cost is paying for a full house wash the week before a pollen peak. The exception: if someone in your house has allergies, or pollen is sitting on shaded siding that stays damp, wash anyway. Pollen that stays wet feeds mildew.

2. Hot surfaces and fast-drying solution

Central Texas summers regularly push surfaces well past 100F. Most pros avoid applying cleaning solution to hot, sun-baked siding because it dries before it finishes working and can leave streaks and dry spots. That is why summer jobs start early, work the shady side first and follow the sun around the house. A cloudy, calm morning is ideal in any season.

3. Hail and storm season

Spring is the stormy stretch in this part of Texas. In the hail reports we have seen for the Round Rock area, April and May are the busiest months, and the September 24, 2023 supercell put hail up to about 4 inches across Round Rock and Georgetown. Two timing lessons: do not schedule a roof cleaning the week after a storm, and do not clean a roof you suspect is hail-damaged. Shingle makers (ARMA) tell homeowners not to high-pressure wash shingles, and bruised, granule-worn shingles are even less forgiving. Get the roof inspected first. Cleaning is not a substitute for an inspection or an insurance claim.

Month-by-month pressure washing calendar for Round Rock

This is the calendar we plan around. “Wash?” is about a full house or roof wash that you want to last. Concrete flatwork is a different story, covered in the surface section.

Month	What is going on in Central Texas	Wash?	Why
January	Cedar pollen at or near its peak; cold fronts	Concrete and roofs only	House siding re-coats with pollen; freezing mornings limit wood and fence work
February	Cedar tapering; oak starting late in the month in warm years	Concrete, roofs, listings	Fine for flatwork; siding best after the cedar finishes
March	Oak pollen begins; cedar tapering off	Maybe	Good for algae-heavy shaded walls, but oak is about to ramp up
April	Oak pollen at its peak; storm and hail season ramps up	Wait if you can	Peak pollen plus storm risk; wash only for a deadline or mold
May	Oak fades, pecan tapers; wettest month on average; storms	Yes, late May	Pick a dry stretch after the catkins drop; before the heat
June	Heat building; surfaces climbing past 100F	Yes, mornings	Early starts, shade first; check your watering day
July	Hot and dry in most years	Mornings only	Solution dries fast on hot walls; good for driveways and patios
August	Peak heat; drought stages possible	Mornings only	Same as July; confirm the City’s current water stage first
September	Heat easing; some years bring big storms	Yes, late month	Algae from summer is visible; watch the forecast for hail
October	Mild days, low pollen, HOA inspection season	Best	Comfortable temperatures and no major pollen
November	Cool, dry, leaves dropping	Best (before leaf drop ends)	Last clean window before cedar; ahead of holiday guests
December	Cedar season starts on the first cold fronts	Early month only	Do house washing before the first big front; flatwork any time

Two notes on that table. First, it describes typical years; a warm winter or an early oak bloom shifts the edges by a few weeks. Second, “wait” never means “ignore.” Black algae streaks, mildew on a north wall and slick green concrete get worse the longer they sit, so a deadline or a slip hazard beats the calendar.

What if the timing is not up to you? Best time by trigger

You got an HOA letter

Do not wait for the perfect month. Read the notice for the cure deadline and the exact item named (driveway, siding, fence, roof). Texas HOA violation notices are supposed to give you a chance to cure, but the details depend on your notice and your community documents, so check them rather than assuming. Get the cleaning done and keep dated proof. Our guide to HOA exterior standards in Round Rock explains what notices usually target, and if your community has a vendor process, our HOA and commercial pressure washing page covers it.

You are about to list your home

Wash before the photographer comes, not after. Most pros recommend finishing a couple of weeks ahead so you have room to fix anything the photos reveal, then spot-touching before showings. Driveway, front walkway, entry siding and the fence line in the background of photos give the most visible lift. If it is cedar or oak season, plan a quick rinse of the front of the house right before photos. Start with house washing and driveway cleaning.

You are repainting

Wash first, let the surface dry fully, then paint. Sherwin-Williams guidance is to wait 24 to 48 hours after washing before painting, and to avoid painting below 50F or above 90F. In practice that points you to October and November, or May mornings, for exterior painting in Round Rock. Longer is better after humid or rainy stretches or on porous surfaces like stucco.

A storm just went through

Walk the property first. If hail hit, photograph and inspect the roof before anything else, and hold off on roof cleaning until it has been checked. Storm debris, leaf litter and tannin from wet oak and pecan leaves are another matter: tannin stains soak into porous concrete, so sweep leaves off flatwork quickly and wash stained spots sooner rather than later.

You are hosting an event or the holidays

Work backward. Concrete and patio cleaning needs a dry stretch and a day to dry; house and fence washing needs a bit more cushion. Booking early is a safe habit for the October to December rush, since that is when everyone else is planning the same thing. See patio and concrete cleaning.

Which surfaces can go in which season, and at what pressure?

Timing and method go together. The wrong pressure ruins a surface in any month.

Surface	Best timing	Method and limit
Concrete driveway, walks, patio	Any month; mornings in summer	True pressure washing, ideally with a surface cleaner so you do not get wand stripes. See driveway cleaning
Fiber cement siding (James Hardie type)	Fall or late spring	Hardie guidance: soft brush and low pressure, wide fan tip, at least 6 feet away, under about 1,500 psi, no acid. Improper cleaning may not be covered by the warranty
Stucco	Fall or late spring	Soft wash. High pressure can strip the finish and push water behind it
Brick and natural limestone	Fall or late spring	Low pressure or soft wash; mortar is the weak point. One limestone supplier advises staying under about 1,200 psi, tip well back
Asphalt shingle roofs	Cool, calm, overcast mornings; never right after hail	Soft wash only, no high pressure. ARMA recommends a gentle low-pressure treatment with a short dwell and a gentle rinse. See roof soft washing
Wood fences	Dry, mild weather; avoid right before a hard freeze	Low pressure, with the grain. See fence cleaning
Gutters and fascia	Late fall, after leaves drop	Clean after most leaves are down; see gutter cleaning

The pattern: concrete is the one surface that happily takes pressure and any month. Everything on the house itself should be timed for a wash that lasts and cleaned gently.

Can you pressure wash on any day in Round Rock?

If you are washing your own house, check the watering rule before you pull out the hose. The City’s published guidance, as we read it, is that residents may pressure wash at home on their designated watering day, and that a company whose main business is pressure washing is not tied to specific watering days. Water waste is prohibited at all times, and the City’s drought stages can add tighter limits, including a ban on street washing in Stage 1. Rules and stages change, so confirm today’s status on the City of Round Rock water page before a DIY wash. To report water waste, the City lists 512-671-2872.

Two practical points. Do not let runoff flow down the street or into storm drains, and watch overspray from your own irrigation: Round Rock city water is hard (the City reports roughly 14.5 grains per gallon), so sprinklers that hit siding or glass leave white mineral spots that no wash schedule will prevent. Moving a sprinkler head helps more than another wash.

What if you only wash once a year?

Pick late October to mid-November. It resets the whole summer’s algae, mildew and dirt, finishes before cedar and before holiday guests, and avoids the heat and storm problems of the other seasons. Add one cheap habit in late May: hose off the front walk and driveway after the oak and pecan debris drops, so tannin does not set into the concrete.

If you can afford two visits, the second goes in mid to late May, after the catkins drop and before the heat, and it should go to the areas that grow fastest: shaded north and east walls, the base of siding near sprinklers, and any concrete under trees. Roofs are a separate decision. Wash them only when streaks are visible, and not on a schedule. Our pricing page explains what drives the cost of each service, and the services overview shows what we do.

How long does a pressure wash last, and why does it look dirty again?

There is no honest single number. How long a wash lasts depends on shade, trees, irrigation overspray and the surface. Shaded walls, north faces and homes with sprinklers wetting the siding grow algae and mildew back faster. Open, sunny, dry surfaces stay clean longer. Pollen and dust come back regardless, because they are airborne and they land on a clean house the same as a dirty one.

That is why we separate “dirty” from “dusty.” A light pollen film is dusty and rinses off. Green or black growth, embedded grime and slimy concrete are dirty and need a real wash. Ask any cleaner for a realistic expectation before you book. Manufacturers say the same about roofs: algae treatments are temporary, and algae-resistant shingles are the lasting fix at replacement time.

Does the timing change by neighborhood?

A little. Older tree-lined streets collect more oak and pecan leaf drop and tannin on flatwork, so May and November matter more. Newer, sunnier subdivisions with young trees tend to need less frequent washing, except where irrigation hits a wall. See our neighborhoods and service areas pages, including Cedar Park, Georgetown and Pflugerville. If the chalky white dust on your driveway is what is bugging you, read our guide to driveway stains from caliche and cedar first.

When to pressure wash in Round Rock: FAQ

What is the best month to pressure wash in Round Rock?

Late October through mid-November is the best window. Pollen is low, the heat has broken and you finish before cedar season starts in mid-December. The second-best window is mid to late May, after oak and pecan pollen mostly drops and before 100F afternoons. Exact timing shifts a few weeks with the weather each year.

Can you pressure wash in summer in Texas?

Yes, with adjustments. Start early, work the shady side first and avoid applying cleaning solution to hot, sun-baked surfaces, because it can dry before it works and leave streaks. Concrete driveways and patios handle summer well. Check your watering day and the City’s current water stage before washing at home.

Should I wait for pollen season to end before pressure washing?

Usually, if the wash is cosmetic. Cedar pollen runs roughly mid-December to mid-February and oak peaks in April, so a wash mid-season gets re-coated. Wash anyway if someone has allergies, if you have a deadline, or if pollen is sitting on damp siding where it can feed mildew. A light pollen film rinses off easily.

How often should I pressure wash my house in Round Rock?

Plan on about once a year as a baseline. James Hardie suggests cleaning fiber cement siding every 6 to 12 months, and shaded walls or homes with sprinklers hitting siding may need more. Driveways and patios depend on use. Roofs should be cleaned only when streaks appear, using soft washing, not on a fixed calendar.

Can I pressure wash on any day with Round Rock water restrictions?

As we read the City’s published guidance, homeowners may pressure wash on their designated watering day, and companies whose main business is pressure washing are not tied to specific days. Water waste is always prohibited and drought stages can tighten the rules. Confirm today’s status on the City of Round Rock water page before washing.

How long after pressure washing can I paint?

Sherwin-Williams guidance is to wait 24 to 48 hours after washing before painting, and to avoid painting below 50F or above 90F. Wait longer after humid or rainy weather, or on porous surfaces like stucco, until the surface is fully dry. In Round Rock, October, November and May mornings fit those temperature limits best.

Book your window

Tell us what you want cleaned and what deadline you are working against (an HOA notice, a listing, a repaint), and we will recommend the right timing and send a firm written quote. We serve Round Rock first, then Cedar Park, Georgetown, Pflugerville, Leander and Hutto. Prefer to read more first? See the full FAQ.

Get a free quote Call (512) 546-6208