Probably fine — but check the neck, not the hands.
Hands and feet often feel cool even when a baby is comfortable. The back of the neck tells the truth.
Sweaty or damp neck Flushed cheeks A hot tummy or chest Clammy skin
Take one layer off, then check the neck again. That's usually all it takes.
Why it matters most for sleep
The NHS says overheating raises the risk of sudden infant death syndrome, which is why a baby is safer slightly cool than too warm. The Lullaby Trust recommends a room of 16–20°C (61–68°F) for sleep.
Asleep, Baby Layers never suggests a warmer sleep sack than the makers' TOG chart for the room, whatever the baby's age and whatever the parent's setting. And never a hat for sleep: a baby cools down through the head.
In hot weather
In hot weather the NHS suggests a single lightweight cotton layer. Babies under six months are best kept out of direct sun, and a pram is never covered with a muslin or blanket, because that traps the heat.
Indoors, or in a warm car, bus or train, take the hat and outer layers off.
If your baby usually runs warm
Some babies run warmer than others. In the app, Adjust to your baby shifts every answer a touch lighter, and the tool on this site has the same setting. Asleep it only ever goes cooler.