Bitcoin in September: Every September Since 2015
Bitcoin has risen in 6 of 12 Septembers since 2015 (50%, against 56% for all months), with an average change of −1.1% and a median of −0.2%. Its best September was 2024 (+7.4%) and its worst 2019 (−13.9%). September ranks 11 of 12 by average change.
Bitcoin in every September, 2015–2026
% change in the monthWhat happens in October after September
How often October rose after bitcoin ended September higher or lower, compared with all months (56% rose).
After a higher September
InconclusiveAfter bitcoin ends September higher, October has risen 80% of the time since 2014 (4 of 5), against 56% for all months, with an average change of +16.7% and a median of +15.0%: too few cases to say.
After a lower September
InconclusiveAfter bitcoin ends September lower, October has risen 83% of the time since 2014 (5 of 6), against 56% for all months, with an average change of +21.4% and a median of +19.4%: too few cases to say.
"Momentum" or "rebound" only when the share differs from all months by at least 5 percentage points, with at least 20 cases, and by more than chance would explain (95% confidence); otherwise "inconclusive". With one month a year, most single-month differences are within chance. The same figures for every month together: bitcoin seasonality.
Bitcoin in September, Year by Year
Month-end close and the change in September, with October next to it.
| Year | Close, end of September | September | October after |
|---|---|---|---|
| 2026 | $83,554 | +6.4% | — |
| 2025 | $114,056 | +5.4% | −3.9% |
| 2024 | $63,330 | +7.4% | +10.9% |
| 2023 | $26,968 | +4.0% | +28.6% |
| 2022 | $19,432 | −3.1% | +5.5% |
| 2021 | $43,791 | −7.2% | +40.0% |
| 2020 | $10,784 | −7.7% | +27.8% |
| 2019 | $8,294 | −13.9% | +10.9% |
| 2018 | $6,626 | −5.9% | −4.6% |
| 2017 | $4,339 | −7.8% | +49.1% |
| 2016 | $610 | +6.0% | +15.0% |
| 2015 | $236 | +2.6% | +33.1% |
Bitcoin by Month
Bitcoin in September: FAQ
Is September a good month for bitcoin?
Bitcoin has risen in 50% of Septembers since 2015 (6 of 12), against 56% for all months, with an average change of −1.1%. September ranks 11 of 12 months by average change. In the last 10 years it rose 4 times. Seasonal patterns are not a reliable guide to any single year.
What was bitcoin's best September?
2024, when bitcoin rose 7.4%. The worst was 2019 (−13.9%).
What happens to bitcoin in October after a higher September?
After bitcoin ends September higher, October has risen 80% of the time since 2014 (4 of 5), against 56% for all months, with an average change of +16.7% and a median of +15.0%: too few cases to say.
What happens to bitcoin in October after a lower September?
After bitcoin ends September lower, October has risen 83% of the time since 2014 (5 of 6), against 56% for all months, with an average change of +21.4% and a median of +19.4%: too few cases to say.
History, not advice: past monthly patterns do not predict any single month. Data to 26 October 2026.
Cite this page
For essays, articles and research. Prices on this page update daily, so the citations include today's date as the date you accessed it.
@misc{corgano2026bitcoininseptemberevery, author = {{Corgano}}, title = {Bitcoin in September: every September since 2015}, howpublished = {\url{https://bitcoinprice.corgano.com/bitcoin-in-september}}, year = {2026}, note = {Corgano Bitcoin Price, accessed 2026-10-27}}