Best Month to Buy Bitcoin (What 13 Years of Data Say)

Everyone in crypto has heard that October is bitcoin’s best month. “Uptober,” the memes say, every single year. And then October 2026 rolls in and, with three days left, bitcoin is down roughly 3% from the month open. So is the pattern broken, or is seasonality actually useful?

I pulled every completed monthly close from 2013 through 2025, thirteen full years of data, and ranked the best month to buy bitcoin by the two numbers that matter: how often the month finishes green, and by how much.

The best months to buy bitcoin, ranked

Two months stand above the rest.

• October: finished positive in 10 out of 13 years (77% win rate) with a median gain around 13%. It earns the nickname.
• February: also positive in 10 of 13 years (77%) with a median gain near 12%. Almost nobody talks about it.

After those two, the next tier includes April (positive in about 62% of years) and November (historically strong but volatile, with some of the biggest single-month gains and some ugly misses). The entire Q4 block, October through December, has a long track record of above-average returns.

You can see the full breakdown, month by month, on our live monthly returns chart.

The worst month to buy bitcoin

September has the weakest record by a wide margin. It is the only calendar month with a negative average return across the full sample. Roughly half of all Septembers have closed red, and the red ones tend to be steep. If you have ever felt like the market hates you in September, the data agrees.

June and August also land below average, though neither is as consistently bad as September. Summer in general has been a rough stretch for bitcoin, a pattern we covered in our look at bitcoin summer seasonality.

Why 2026 is breaking the Uptober pattern

Bitcoin opened October 2026 near $83,400 and sits around $80,600 as of October 28. That is roughly a 3% loss with only a few days left. So does one bad October kill the whole pattern?

No. A 77% win rate means roughly one in four Octobers is red. That is how averages work. The pattern does not promise that every October is green. It says that if you had bought the October open every year for thirteen years, you would have come out ahead more often than any other month. One losing October in four is baked in.

This is the part most people skip. Seasonality is not a trade signal. It is a base rate, a starting point. It tells you which months have historically had the wind at their back. It does not tell you what this specific month will do.

Should you actually time your buys by the calendar?

Here is the honest answer. If you are a long-term holder using dollar-cost averaging, the data mildly favors buying heavier in September (when prices tend to be lowest) and lighter in November (when prices tend to be highest). The edge is small. Over a multi-year window, the timing of your monthly buys matters far less than whether you kept buying at all.

If you are a shorter-term trader, calendar seasonality alone is not enough to put money on. A 77% hit rate across 13 samples is interesting, not statistically bulletproof. The better use is as a filter. When everything else in your process says buy, and seasonality agrees, you have a small tailwind. When everything says sell and seasonality disagrees, maybe you tighten the leash instead of ignoring it entirely.

The pattern nobody talks about

The most useful takeaway from the data is not any single month. It is the shape of the year. Bitcoin has historically been weakest from late spring through early fall (May to September) and strongest from October through April. That six-month rhythm has held across bull markets, bear markets, and everything in between.

It is not a guarantee. There is no guarantee in markets. But if you zoom out from any single month and look at the seasonal curve across thirteen years, the shape is remarkably consistent. The best month to buy bitcoin, on average, is the one right after the worst stretch. And the worst stretch tends to end around September.

Common questions

What is the best month to buy bitcoin?

October and February are tied for the strongest historical record, both finishing positive in roughly 77% of years since 2013 with median gains near 12 to 13%. The entire October-through-April window has historically outperformed the rest of the year.

What is the worst month to buy bitcoin?

September is the weakest month by a wide margin. It is the only calendar month with a negative average return, and about half of Septembers since 2013 have closed red.

Does bitcoin seasonality actually work?

The seasonal pattern has been consistent across thirteen years, but a 77% win rate over 13 samples is a tendency, not a law. It works best as a filter alongside other analysis, not as a standalone trade signal.

Why is October 2026 red if October is bitcoin's best month?

A 77% win rate means roughly one in four Octobers closes negative. One red October does not break the pattern. It is the expected noise inside a positive average.

Should I time my bitcoin purchases by calendar month?

For long-term holders using dollar-cost averaging, the data mildly favors buying heavier during the weak months (like September) when prices tend to be lower. The edge is small compared to simply buying consistently over time.

Keep reading

• Bitcoin Summer Seasonality: Why Summer Hurts
• Bitcoin Uptober Explained: Is October Really Different?

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Education, not financial advice. Trading involves real risk.