These figures are computed from 15 years of actual monthly closing prices. Past seasonal patterns are not a guarantee of future performance. See our methodology for how this is calculated, or visit the Academy to learn how to read seasonal data responsibly.
Dexcom seasonality — common questions
What is Dexcom's best month historically?
Historically, June has been Dexcom's strongest month, averaging +8.37% with a 81% win rate over 15 years of data. September has been the weakest at -5.12%.
Is Dexcom seasonal?
Dexcom shows a measurable seasonal pattern: its best and worst months differ by 13.49 percentage points on average. These figures come from 15 years of real monthly closing prices. Seasonality is a historical tendency, not a prediction.
How does Dexcom historically perform in July?
Dexcom is currently in July, which has historically averaged -0.65% with a 50% win rate. That is a historically neutral window.
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