Do Rainy Days Make Babies Sleepy? 5 Reasons Your Baby May Feel Drowsy

Do you find your baby is napping longer when it rains? Your child might be alert and active on a sunny day. However, when it's raining and the rest of the world is gloomy and dark, your baby might suddenly settle and take a nap. 

Rain doesn't directly influence babies' sleep, but it can do so because of the changes that happen in rainy weather. Some changes, like less sunlight, less noise, cooler temperatures and changes to the normal routine, can make a difference. Read on to know as we reached out to an expert, who explained how all babies have an immature body clock, and any slight changes in their environment can disrupt their sleepiness.

Do Rainy Days Make Babies Sleepy Early?

Yes, many babies may seem sleepier on rainy days. However, this does not mean that rain directly makes babies sleep. Dr Harshit Kumar, Senior Consultant - Paediatrician and Neonatologist at Cloudnine Group of Hospitals, Jalandhar, explains, “Many parents notice their babies sleeping more or feeling drowsier on rainy days, and there's a reasonable physiological explanation behind it, not just a coincidence.”

Several changes happen during rainy weather that may influence a baby's sleep environment. A 2024 review published in the European Journal of Pediatrics found that light exposure plays an important role in establishing an infant's circadian rhythm. The review highlighted that a regular light-dark cycle could help with nighttime sleep and daytime wakefulness.

5 Reasons Why Rainy Days Make Babies Sleepy?

Here is what Dr Kumar explains 

1. Less daylight may affect the baby's body clock

The daytime conditions can be significantly shifted to be darker due to rain or cloudy skies. Light is an important cue for the body clock, or circadian rhythm, according to Dr Kumar.

In darkness, the hormone melatonin is produced in higher amounts, which is related to sleep. In addition, babies gradually establish sleep/wake cycles in the first few months of life.

This means a dark, rainy afternoon may alter the usual environmental cues, although it does not mean every baby will automatically produce more melatonin or sleep longer.

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2. The sound of rain can act like background noise

Dr Kumar. Explains that rain makes a continuous, rhythmic sound. This can be useful to some infants, similar to white noise, to help block out abrupt noises in the house.

Another 2024 trial from Elsevier involving 120 premature infants found that white-noise exposure was associated with longer sleep, better sleep efficiency and fewer awakenings. The study did not specifically focus on rainfall, but the results indicate that a continuous background sound could impact infant sleep in some infants.

3. Cooler weather may make the room more comfortable

Rain often brings cooler temperatures. A comfortable sleep environment may make it easier for a baby to settle.

However, Dr Kumar adds that cooler outdoor weather does not necessarily mean the nursery needs to be cold. Monsoon conditions can also bring high humidity, making indoor spaces feel damp or uncomfortable.

The focus should therefore be on keeping the baby's room comfortable, stable and well ventilated, rather than simply making it colder.

4. Changes in air pressure may contribute to drowsiness

Dr Kumar explains that barometric pressure will decline in rainy conditions. Changes in atmospheric pressure are sometimes associated with changes in energy or mood.

But the connection between pressure changes and babies' sleepiness is not well documented. Therefore, it is recommended that it be taken as a possible factor to be considered as an explanation rather than a confirmed explanation.

5. Rain can make the home quieter

Rain often means fewer outdoor activities and distractions. Parents may stay indoors, and the household can become calmer.

This quieter environment can make it easier for some babies to settle, particularly if they are sensitive to noise or activity around them.

Do Rainy Days Affect A Baby's Sleep Routine?

They can. A particularly dark and wet day may lead to longer daytime naps. If these naps become significantly longer than usual, they may sometimes affect night-time sleep. Dr Kumar recommends keeping the baby's routine as consistent as possible.

“Maintain a consistent sleep routine regardless of the weather outside, since predictability helps babies self-regulate their sleep cycle,” the expert explains.

Parents can focus on keeping familiar:

• Nap timings
• Bedtime routines
• Feeding patterns
• Daytime and night-time cues

The aim is not to prevent a baby from sleeping when tired. It is to avoid allowing the weather to completely disrupt the usual routine.

How To Manage Baby Sleep During Monsoon

Where possible, keep the cues as normal at the same time of day as usual, even during the rainy season. If there's any relief from the rain, natural daylight may help. Therefore, if possible, during breaks in the rain, it is recommended to expose the baby to daylight or bright light, which helps to support a baby's body clock.

• Ensure good room ventilation. Nurseries can get stuffy in the monsoon due to the humidity. A comfortable environment can be maintained with good ventilation.
• Bed covers should also be checked on a regular basis by parents. Excess moisture can be indicated by wet bedding or a musty odour.
• Dr Kumar recommends that parents make sure that the infant's sleep area is kept dry, with no mould or musty smell.
• If necessary, use blackout curtains. Daytime brightness can vary greatly depending on the weather conditions. Use blackout curtains to maintain the sleep cues for nap time. 
• The room need not be dark all day, however, light is also significant during the day to establish sleep-wake cycles.
• Watch daytime naps as parents can check if a day when their baby sleeps for significantly longer than usual on that day affects his/her bedtime or if the baby wakes up in the night. 
• Don't need to wake the baby just because it's raining. Instead, try to find a consistent pattern over a few days.

When Should Parents Speak To A Paediatrician?

A temporary change in sleep during rainy weather is usually not something to assume is a medical problem. However, persistent sleep changes should not automatically be blamed on the monsoon.

Dr Kumar recommends speaking with a paediatrician if sleep problems continue for more than a couple of weeks or occur alongside other changes such as:

• Persistent fussiness
• Feeding changes
• Cold or cough
• Skin problems
• Other signs of illness

The important point is to look at the whole picture, rather than assuming that a sleepy baby is simply responding to rain.

ALSO READ- Newborn Care During Monsoon: Why Rainy Weather Needs Extra Attention From Parents

Conclusion

Some babies may be sleepier on rainy days, but the reasons for this are not clearly understood. This can be a reduction in light, a more consistent noise in the background, a cooler environment and a quieter home. Babies are also developing their circadian rhythms, which is why light and the daytime are so important.

When the monsoon comes, parents don't have to make all the changes. Stick to a sleep schedule, provide comfortable air exchange, get some light in the morning as much as possible, and pay attention to infectious diseases to keep a baby's sleep schedule in check.