Newborn crying typically peaks around 2 months of age and then steadily improves between 3 and 5 months. If you’re in the thick of it right now, that timeline can feel impossibly far away, but the pattern is remarkably consistent across healthy babies. Understanding what’s driving all that crying, and what the milestones along the way look like, can make the weeks ahead more manageable.
How Much Crying Is Normal
Healthy infants cry about 1 to 3 hours a day. During the first 6 weeks, the average sits between about 2 and 2.25 hours daily. That number drops noticeably by 8 to 9 weeks, when the average falls closer to just over an hour a day. So while it doesn’t feel like it in the moment, the shift happens relatively quickly once your baby passes the peak.
The overall pattern follows a curve: crying increases from birth, hits its highest point around 6 to 8 weeks, and then tapers off. By 3 to 5 months, most babies cry significantly less and are much easier to soothe. This arc is so predictable that pediatric researchers gave it a name.
The Period of PURPLE Crying
The term “PURPLE crying” is an acronym that describes the specific characteristics of this normal developmental phase. It starts around 2 weeks of age and ends between 3 and 5 months. Each letter captures something parents commonly experience:
- P for peak pattern, with crying increasing over the first weeks and peaking around 2 months
- U for unexpected, meaning bouts can start and stop for no obvious reason
- R for resists soothing, because sometimes nothing you do will calm your baby
- P for pain-like face, even when nothing is actually wrong
- L for long-lasting, with episodes stretching on much longer than you’d expect
- E for evening, since crying tends to cluster in late afternoon and evening hours
The most important takeaway from this framework is the “R”: your baby will sometimes resist every soothing technique you try, and that doesn’t mean you’re doing something wrong. It’s a feature of this developmental stage, not a reflection of your parenting.
Why Evening Crying Is the Worst
Many parents notice that the hardest stretch of crying happens in the late afternoon or evening, sometimes called the “witching hour.” This isn’t a coincidence. Newborns don’t produce the sleep-regulating hormone melatonin in a rhythmic day-night pattern until around 3 months of age. Before that, their internal clock hasn’t sorted out the difference between day and night, and their sleep-wake cycles are unstable.
Without that biological signal telling their body it’s time to wind down, babies accumulate fatigue and overstimulation throughout the day, and it tends to boil over in the evening. Once melatonin production kicks in around 3 months and sleep cycles start to stabilize, the evening crying spells typically fade. This is also when many parents notice their baby begins sleeping in longer stretches at night.
When Crying Crosses Into Colic
If your baby cries for more than 3 hours a day, on more than 3 days a week, for more than 3 weeks, that meets the clinical definition of colic. This “rule of three” has been used by pediatricians for decades. Colic isn’t a disease or a sign that something is medically wrong. It’s essentially the extreme end of the normal crying curve.
Colic follows the same timeline as PURPLE crying. It starts in the first few weeks of life and almost always resolves by 4 months. The crying episodes are intense, inconsolable, and often have no identifiable trigger. Babies with colic may clench their fists, pull their legs up, and look like they’re in severe pain, which is understandably alarming. But in the vast majority of cases, these babies are otherwise healthy, gaining weight normally, and feeding well.
What Changes at 3 to 4 Months
Several things converge around this age that shift your baby away from reflexive crying and toward more varied communication. Around 8 weeks, babies start producing real social smiles, the intentional, responsive kind where they’re actually reacting to your voice or face. Before that, any smiles you see are involuntary reflexes. As these social smiles develop, your baby gains a new tool for interacting with you that isn’t crying.
At the same time, the nervous system is maturing rapidly. Sleep-wake cycles stabilize around 3 months, melatonin production becomes rhythmic, and the digestive system becomes more efficient. Your baby is also getting better at self-regulating, meaning they can handle stimulation without becoming overwhelmed as easily. All of these changes together mean that by 4 months, the daily experience of parenting feels dramatically different from the newborn weeks.
Signs That Crying May Signal Something Else
Normal developmental crying, even colic, doesn’t come with other physical symptoms. If your baby’s crying is accompanied by any of the following, it’s worth having them evaluated promptly:
- Fever in a baby under 8 weeks old: This always warrants immediate medical attention.
- Changes in feeding: Refusing to eat, vomiting (especially if it’s green or forceful), or arching and crying during or after feeds.
- Breathing problems: Rapid breathing, wheezing, or visible effort to breathe.
- Stool changes: Blood in the diaper, persistent diarrhea, or a swollen, tender belly.
- Extreme irritability: A high-pitched cry that sounds distinctly different from their usual crying, or a baby who is inconsolable and also unusually limp or lethargic between episodes.
- Swelling or bruising: Anywhere on the body, or favoring one limb over another.
Normal crying, no matter how intense, will still have calm periods in between. Your baby should be feeding, having wet diapers, and gaining weight on a normal trajectory. If those basics are in place and there are no red-flag symptoms, you’re almost certainly dealing with the standard crying curve.
Getting Through the Peak
Knowing the crying will taper off by 3 to 5 months is helpful, but it doesn’t make 2 a.m. any easier right now. A few things that can help you survive the peak weeks: accept that some crying episodes simply can’t be stopped. This is the hardest part for most parents, because the instinct to fix it is overwhelming. But “resists soothing” is a defining feature of this phase, and putting a baby down in a safe sleep space while you take a few minutes to breathe is not neglect.
Rotate caregiving duties if possible. The peak crying weeks are a physical endurance challenge, and splitting evening shifts with a partner, family member, or friend can prevent burnout. Track your baby’s crying loosely over the weeks rather than day by day. Individual days will vary wildly, but looking back over a two-week window, you’ll start to see the overall trend bending downward once you pass the 8-week mark. That evidence of progress can be the thing that keeps you going.