Night waking at 13 months is extremely common and almost always tied to one of a handful of predictable causes: new physical milestones like walking, teething pain from incoming molars, a nap schedule that needs adjusting, or simply the developmental burst happening in your toddler’s brain right now. The good news is that most of these triggers are temporary, and once you identify the likely culprit, the nights usually improve within a few weeks.
Walking Changes Everything
At 13 months, many toddlers are cruising along furniture or taking their first independent steps. Walking is the single most exciting thing that has ever happened to your child, and their brain doesn’t want to stop practicing just because it’s dark outside. You may notice your toddler pulling to stand in the crib, bouncing on their legs, or even trying to cruise along the rails at 2 a.m. This isn’t defiance. Their nervous system is literally wired to rehearse new motor skills during light sleep cycles.
The best thing you can do is give your toddler plenty of chances to practice walking during the day. The more they work on it while the sun is up, the less their brain needs to process at night. This phase typically lasts one to three weeks once a new skill is firmly established.
First Molars May Be Coming In
The first molars tend to start pushing through between 13 and 19 months, and they’re significantly larger and more painful than the front teeth your baby already has. In a clinical trial looking at teething symptoms, 82% of children experienced sleep disturbances during tooth eruption, making it the second most common symptom after drooling (92%). Irritability affected about 76% of teething children.
Molar pain is often worse at night because there are fewer distractions. If your toddler is drooling more than usual, chewing on everything, rubbing their ears, or refusing foods they normally like, teething is a strong suspect. You might also notice red, swollen gums toward the back of their mouth. The disruption from a single tooth usually peaks over a few days, though molars can take longer to fully break through than front teeth did.
Their Brain Is Working Overtime
Around 13 months, toddlers are absorbing language at a remarkable pace. They’re starting to understand simple directions, point at things they want, and connect words with objects. This cognitive leap is exciting for them but taxing for their sleep. The brain consolidates new learning during sleep, and when there’s a lot of new information to process, sleep cycles can become more fragmented. Your toddler may wake between cycles and have trouble settling back down simply because their brain is more active than it was a month ago.
This kind of waking often looks different from pain or hunger. Your child might seem alert, babbling, or even cheerful when they wake, rather than distressed. It passes as the new skills become routine.
The Nap Schedule May Need an Update
At 13 months, most toddlers are still on two naps a day, but some are beginning to show early signs of readiness to drop down to one. If your child is doing any of the following for at least a week or two, the nap transition could be affecting nighttime sleep:
- Refusing or protesting one of their naps
- Taking much shorter naps when they previously napped well
- Waking before 6:00 a.m. most mornings
- Taking longer than 20 minutes to fall asleep at naptime or bedtime
Don’t rush the transition based on a few bad days. Most sleep consultants recommend waiting until you’ve seen consistent signs for at least one to two weeks before switching to a single nap. Dropping a nap too early can backfire and make nights worse, not better.
If you’re sticking with two naps, check your wake windows. At 13 months, most toddlers need about 3.25 to 4 hours of awake time between sleep periods. The first window of the day is usually the shortest (around 3.25 hours after waking), and the longest stretch should come before bedtime (closer to 4 hours). If wake windows are too short, your toddler may not have built up enough sleep pressure to stay asleep through the night. If they’re too long, overtiredness can cause more frequent waking. On days when a nap gets skipped or cut short, moving bedtime earlier by 30 minutes or so helps prevent an overtired spiral.
Hunger Is Rarely the Cause
By 13 months, toddlers get enough nutrition during the day that they don’t physiologically need to eat at night. If your child is waking and seeming to want milk, it’s almost certainly about comfort and habit rather than actual hunger. This is especially true if you’re in the middle of transitioning from breast milk or formula to cow’s milk, which can shift routines enough to create new sleep associations.
If nighttime milk has become part of how your toddler falls back to sleep, gradually reducing the amount or shortening nursing sessions can help them learn to resettle without it. Offering a comfort object like a small lovey (safe for this age in the crib) gives them something else to soothe with.
How Much Sleep They Actually Need
Toddlers between 12 and 24 months need 11 to 14 hours of total sleep in a 24-hour period, including naps. At 13 months, that typically breaks down to about 10 to 12 hours overnight and 2 to 3 hours of daytime naps. If your toddler is sleeping significantly less than 11 hours total or significantly more than 14, adjusting the schedule may help with night waking.
Too much daytime sleep can steal from nighttime sleep, leading to long wakeful periods in the middle of the night. Too little daytime sleep creates overtiredness, which paradoxically causes more night waking, not less. If your child’s total sleep looks about right but nights are rough, the issue is more likely developmental or related to teething than a scheduling problem.
What Actually Helps
The specific fix depends on the cause, but a few strategies help across the board. Keep the bedtime routine consistent and predictable: the same steps, in the same order, at roughly the same time each night. A toddler’s brain thrives on predictability, especially when everything else in their world is changing fast.
During the day, let your child practice whatever milestone they’re working on until they’re bored of it. Walk everywhere. Point at and name objects constantly. Tire out their body and feed their brain while it’s light out. At night, keep interactions brief and boring when they wake. Low light, quiet voice, minimal engagement. You want to communicate that nighttime is for sleeping without turning the wake-up into a stimulating event.
If you suspect teething, cold teething rings before bed and age-appropriate pain relief can help on the worst nights. For nap transitions, make changes slowly, shifting by 15 to 30 minutes at a time rather than overhauling the whole schedule at once.
Most 13-month sleep disruptions resolve within two to four weeks. If night waking is accompanied by fever lasting more than a couple of days, significant changes in appetite or behavior, or breathing difficulties during sleep, those warrant a conversation with your pediatrician rather than a wait-it-out approach.