The J Months Are Real. Sort Of. What Retail Data Actually Says About Your Slow Season

What the data actually says

The U.S. Census Bureau publishes seasonal adjustment factors for every retail category. These factors are, in plain English, a measure of how far each month runs above or below an average month. A factor of 1.00 is a perfectly average month. Below 1.00 is a slow month. Above it is a hot one.

Here is what those factors look like for clothing and accessories stores, the Census category closest to what most apparel and western wear resellers move. An average month is indexed at 100.

Three things jump out.

1. January is the real cliff, and it is not close. Clothing sales run about 24 percent below an average month in January. February is nearly as bad. The post-holiday hangover is the deepest trough of the year in almost every category the Census tracks. Department stores drop to roughly a third of their December volume.

2. June is actually weaker than July for apparel. The saying blames July, but the Census factors put June at 94 and July at 99, which is nearly an average month. So why does July feel so dead on live selling? More on that below.

3. December is not a good month. It is the entire game. Clothing runs 54 percent above average in December. Categories that resellers love skew even harder: electronics stores run about 38 percent above average in December, and jewelry stores more than double. The St. Louis Fed notes that hobby, toy, and game stores do roughly 30 percent of their entire annual sales in November and December alone.

Why July feels worse than the data says

If July is a nearly average month for clothing overall, why are your shows quiet? A few reasons that hit live sellers and small online resellers harder than big-box retail.

Prime Day compression. Amazon's July event pulls enormous spend into a narrow window. Prime Day 2025 generated a reported $24.1 billion in U.S. online sales over four days. That money does not appear from nowhere. Shoppers hold spending in the weeks before the event and are tapped out in the weeks after, so for small sellers the surrounding weeks feel far quieter than the monthly total suggests.

Attention, not just wallets. Live selling competes for screen time, and July is peak vacation, peak daylight, and peak “the kids are home.” Your buyers are not broke. They are at the lake.

The averages hide the mix. The Census numbers include air conditioners, swimsuits, and back-to-school prep. If your inventory skews toward boots, flannel, layers, and giftable items, your personal seasonality curve is steeper than the national one.

Q4 is where the year is won

The National Retail Federation reports that November and December have averaged about 19 percent of total annual retail sales over the last five years, and the share runs higher for gift-heavy categories. The 2025 season crossed $1 trillion for the first time. NRF also notes those holiday dollars are disproportionately profitable, because the extra volume arrives without much extra fixed cost.

“Consumers came out to spend this holiday season and clearly underscored the solid growth in the US economy,” said NRF Chief Economist Jack Kleinhenz after the 2024 season set records. Source

“We remain bullish about the holiday shopping season and expect that consumers will continue to seek savings in nonessential categories to be able to spend on gifts for loved ones,” said NRF President and CEO Matthew Shay ahead of the 2025 season. Source

Read those two quotes as a reseller and the takeaway is simple: buyers show up in Q4 no matter how nervous they sound in July surveys. The sellers who win Q4 are the ones who used the slow months to get ready for it.

The off-season playbook

Slow months are not a punishment. They are the only part of the calendar where your time is cheap. Here is where to spend it.

Source now, sell later. Your competitors are discouraged in July, which means bins, estate sales, and bulk lots are less contested and often cheaper. Every dollar of inventory you buy in July is inventory you are not fighting for in October. Think in Q4 terms while you source: gifts, toys, boots, cozy, collectible.

Build your listing backlog. The single biggest Q4 bottleneck for resellers is not inventory, it is listing throughput. Photograph, describe, and stage inventory now so you can flood listings live when demand returns. If crosslisting is what eats your hours, this is exactly the problem our AI Crosslisting System was built to kill.

Build audience while attention is cheap. Followers gained in July buy in November. Slow months are the right time to run and join raid trains, because pooling audiences matters most when every individual audience is thin. Browse open trains or grab a slot and put your shop in front of buyers who are already watching someone else's show.

Know your numbers before the rush. Volume hides bad margins in December and exposes them in July. Use the quiet weeks to figure out your true take-home per sale with the Whatnot fee calculator, and cut the inventory categories that only look profitable when everything is selling.

Protect January cash on purpose. Remember the chart: the deepest trough of the year comes immediately after your biggest month. NRF data shows the vast majority of returns land in January too. Set aside a slice of your December take before you spend it, because February you will need it.

The bottom line

The J months saying survives because it feels true, and January genuinely is brutal. But the summer slump is shallower than it feels, and it is partly an attention problem you can work around rather than a demand problem you cannot. The retail year is not twelve equal months. It is a long runway and a short flight. Right now is runway. Use it.