Real family data
When Do Babies Actually Sleep Through the Night? Real Ages from Thousands of Families
Half of babies sleep through the night by 3 months, based on real entries from the Baby Notebook community. The most common age was 2 months; the middle half fell between 2 months and 6 months.
| Age | Share of families |
|---|---|
| 1 month | 10.6% |
| 2 months | 26.5% |
| 3 months | 22.7% |
| 4 months | 8.7% |
| 5 months | 6.9% |
| 6 months | 6.3% |
| 7 months | 3.7% |
| 8 months | 3.4% |
| 9 months | 2.4% |
| 10 months | 2.6% |
| 11 months | 2.1% |
| 12 months | 2% |
| 13 to 15 months | 1.1% |
| 16+ months | 1% |
Boys and girls: boys averaged 4.3 months and girls 3.9 months.
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