Late August has a ritual. The appointment book loosens a little, the phone goes quiet on a Tuesday afternoon, and somebody supplies the explanation — a consultant, a rep, a Facebook group. Back to school. Families are reorganizing. Wellness visits get deferred. Happens every year. Nothing to do but wait for October.
It's a tidy story, and it has one great advantage: nobody ever checks it. If your September is slow, the story explains it. If your September is fine, nobody brings the story up. That's how seasonal folklore survives in any industry — it only ever gets tested in the direction that confirms it.
I went looking for it in both directions.
I had the data to do it: twenty-nine general-practice accounts with at least three complete years of history each — 142 practice-years between 2016 and 2025, drawn from more than a decade of Google Ads data (August 2015 – August 2026), with robust multi-account coverage from 2017 onward. If demand were perfectly flat, every month would carry 8.33 percent of the year's clicks. August carries 8.53 — above flat, not below it. September carries 8.23. The famous drop, measured, is three tenths of a point. In August, twelve of the twenty-nine practices ran below flat; in September, fifteen. Half on each side, both months, which is what a coin looks like, not a season.
That's the dip. A rounding error with a publicist.
Scale 0–10% · zero baseline, not truncated
29 general-practice Google Ads accounts · 142 practice-years, 2016–2025 · each month's share of its own account-year total, averaged per account, then across accounts · a perfectly flat year is 8.33% every month.
The larger finding is the one nobody tells stories about: the whole year barely moves. The gap between the busiest month and the quietest — January's 9.38 percent to February's 7.93 — is a point and a half. General-practice veterinary demand is close to aseasonal. Pets don't check the calendar before they get sick, and eleven years of clicks say so.
Even January's crown is borrowed. It posts the year's highest click share, and you could build a story around that too — new year, new wellness plans. But January's share of impressions runs a full point above its share of clicks, and that pattern has a much less romantic name: budget resets. Every January, ad budgets refresh, paused campaigns wake up, and more ads get shown. The market didn't surge. Somebody's settings changed. Which is the habit worth taking from this whole exercise — when a month looks special, ask whether the demand moved or the dials did.
While I was in the data, I checked one more piece of received wisdom, because you've almost certainly been given it: pet owners search at night and on weekends, so that's where the budget should lean. Across sixty-three general practices, demand peaks between nine and ten on weekday mornings and decays all afternoon. Monday is the busiest day of the week. Sunday is the quietest. Business hours carry about 62 percent of clicks. For general practice, the nights-and-weekends advice isn't just unsupported — it's backwards.
Here is the part I actually want you to keep, and it isn't a statistic of mine. You own the best dataset on your own practice's seasonality, and it's sitting in your PIMS. Pull last year's appointment counts, August through October. Then the year before. Look at your own curve before you accept anyone's story about it — including this one. If your Septembers genuinely sag year after year, that's real, and worth planning around. If they don't, you've just retired a piece of folklore that was quietly making your decisions for you. It's the same discipline you already practice in the exam room: you don't dose on a story, you weigh the patient. Weigh the month.
If your September still feels lighter than this chart says it should — that can be real, too. What the data measures is people searching; what you feel is the appointment book. The gap between the two is usually a wellness visit deferred by a family reorganizing its calendar, not an owner who stopped needing you — which is exactly why the one who does search this month deserves a running campaign, not a paused one.
And if the phone does soften this week and someone suggests pausing the ads until things pick back up — the numbers above are why that's usually the wrong move. The demand barely moves in September. The owner who searches on the 15th is exactly as real as the one who searches in January. Pausing doesn't save a slow month; it donates your share of a nearly normal one to whoever stayed on.
A note on the math: figures here come from an analysis of general-practice veterinary Google Ads accounts — 29 practices, 142 practice-years, 2016–2025, within a portfolio spanning August 2015 to August 2026. That's one portfolio's client base, not an industry census; practices that hire ads management aren't a random sample. The day-of-week figures cover 63 general practices as a lifetime aggregate. All of it describes general practice — emergency and specialty medicine may behave differently — and for your own practice, your PIMS outranks every number on this page.