Summertime brings long, sunny days and a slower pace of life that is absolutely perfect for making family memories. However, the intense Oklahoma summer heat can be incredibly overwhelming for the newest, most delicate members of your family. If you are a new parent bringing your baby home during these sweltering months, figuring out how to keep your newborn cool in the summer can feel like a guessing game.

Because newborns can’t regulate their body temperature the way older children and adults do, the summer season can bring on a layer of anxiety for parents. You want to enjoy the beautiful weather, but your top priority is keeping your little one safe. Fortunately, learning how to keep your newborn cool in the summer doesn’t have to be a mystery.

I am a pediatric RN, a safety-certified newborn photographer, and a mom who has been in your shoes. I’m here to share expert, hard-earned wisdom on baby safety. I also want to give you an stress-free way to capture beautiful summer memories you will treasure forever. Please note that while I am an RN, this guide is for informational purposes only. It does not replace professional medical advice. Always consult your pediatrician with any specific health concerns.

What Outside Temperature is too Hot for a Baby?

As a general rule of thumb, parents should avoid taking their newborns outside for prolonged periods if the temperature or the heat index climbs above 90°F. On these hot days, infants can overheat much faster than we realize, turning a quick backyard visit into a safety hazard.

A regular temperature for a newborn sits consistently between 97.5°F and 99.5°F. Newborn’s sweat glands are not yet fully developed. They do not sweat the way we do, so they lack the ability to cool themselves down. When the Oklahoma heat index begins to soar, your baby relies entirely on you to keep them safe and cool.

Choosing the Right Newborn Summer Clothes and Swimwear

Have you ever heard of the plus one rule for dressing infants? Remember this simple rule of thumb, dress your baby in just one more layer than you would comfortably wear yourself, whether it’s daytime or bedtime. On very hot days, a simple, lightweight cotton onesie or just a diaper is perfect.

Dressing your new baby in miniature, sunny outfits is undeniably one of the most fun parts of being a new parent! However, when you are planning how to keep your newborn cool in the summer, proper sun protection must come first when outdoors. Instead of sleeveless shirts or short rompers that expose delicate skin, look for loose, lightweight, light-colored long sleeves and pants. These provide a physical barrier against harsh UV rays while allowing air to circulate. Don’t forget a breathable, wide-brimmed sun hat to shade their precious face and eyes.

Let’s talk about those irresistible little swimsuits, the ones you walk by at the store and say “aawww”! While they are exceptionally cute, they usually aren’t the most practical choice for actual sun safety. Pediatricians strictly recommend avoiding sunscreen on babies under six months old. Instead of using sunscreen, safely dress them in full-body, long-sleeve swimsuits. Make sure to find the ones with built-in UPF 50+ protection, these are the absolute best choice. They give you complete peace of mind without irritating your newborn’s ultra-sensitive skin.

Staying Safe in the Oklahoma Sun

Getting outside fresh air is wonderful for the emotional and physical development of both you and your baby, but conquering the summer heat requires a deliberate strategy.

Avoid Peak Hours: The easiest way to prevent heat exhaustion is to structure your day intentionally. Plan your outdoor walks or backyard patio time for the cooler early morning or late evening hours. Stay safely indoors during peak sun hours which is typically between 10AM and 4PM. This is when the sun’s rays are direct and the UV index is at its highest.

Prioritize Shade: The American Academy of Pediatrics recommends keeping infants under six months old out of direct sunlight completely. When you are out, park your stroller under a tree canopy, relax under a park pavilion, or invest in a high-quality, breathable pop-up tent with mesh sides for airflow. A personal favorite of mine for park picnics, backyard relaxation, and lake days is the Baby Moov UPF 50+ Beach Tent. No matter how comfortable you feel, aim to take a cooling break in the shade or indoors every 20 minutes. The Oklahoma sun moves fast, and as a new mom, you need to protect your own hydration and energy levels, too!

Never Cover the Stroller with a Blanket: It can be incredibly tempting to drape a light muslin swaddle or blanket over the front of a stroller to block out the bright sun while your baby naps. Please avoid doing this. Draping any fabric over a stroller restricts airflow and can quickly create a dangerous greenhouse effect. Instead, use your stroller’s canopy, attach a clip-on mesh shade, and use a portable stroller fan to keep a fresh breeze constantly moving across your baby.

Spotting Newborn Overheating Signs

Even when you are incredibly careful, changes in temperature can happen quickly. Every parent should be aware of the common newborn overheating signs below so they can respond immediately.

Extreme fatigue, lethargy, or difficult to wake up, a sudden disinterest in feeding or completely refusing to drink, a noticeably red face or skin that feels hot and dry to the touch, rapid and shallow breathing, damp hair or sweat around the neck and chest, fewer wet diapers than usual (a major red flag for dehydration).

If you notice these signs, act immediately. Knowing exactly how to keep your newborn cool in the summer heat means taking swift action. Move your baby into a cool, air-conditioned indoor space. Strip off any damp, sweaty clothing. Replace it with a fresh, dry outfit. Next, gently apply a cool, damp washcloth to their forehead and torso. You can also give them a soothing, lukewarm bath. Finally, offer a feed of breastmilk or formula right away. Small, frequent feedings will help them actively rehydrate.

Staying Hydrated and Comfortable Indoors

Hydrating is key for everyone in the Summer, especially for infants. If your baby is under 6 months old, breastmilk or formula offers all the hydration and electrolytes they need, no extra water is recommended. On particularly hot or humid days, simply offer smaller, more frequent feedings to keep their fluid levels topped off.

Inside your home, focus on creating a cool, restful oasis for daytime naps and nighttime sleep. Keep your curtains and blinds tightly drawn during the afternoon to block out the harsh midday heat. A nursery fan is excellent for keeping the indoor air circulating. Ensure the fan is placed safely out of reach of little fingers and is never pointed directly at your baby’s crib while they rest.

Summer Newborn Photos Captured In-Studio

You shouldn’t have to miss out on preserving your baby’s fleeting first weeks just because it is scorching outside. Every session at Ashley McClintock Photography is a calm, guided sanctuary. Here, mothers can slow down, breathe, and simply soak in this beautiful season. Our boutique studio proudly serves families throughout Oklahoma City, Moore, Edmond, Yukon, and Norman. The space is perfectly climate-controlled. This ensures your baby stays safe and content while I create timeless artwork for your home.

As a trusted OKC newborn photographer and a practicing pediatric registered nurse, I combine newborn care with timeless photography. I am a pediatric RN and one of only two safety-certified newborn photographers in the entire state of Oklahoma, so you can completely let go of any mom anxiety. I know exactly how to monitor your baby’s well-being, giving your family a unique experience that puts safety and comfort above all else.

This combination of safety and tailored photography is precisely why I was named the “Best of the 405” Portrait Photographer for both 2025 and 2026. This experience is entirely stress-free, even for families blessed with multiples; a dedicated assistant is brought in for twin sessions to ensure every single baby is safely handled and expertly wrapped. Best of all, immediately after your session, you will relax in the cool air while you select your favorite photos that same day.

Let’s Celebrate Your Summer Baby

Summertime with a newborn is an incredibly magical chapter for your family. With a few smart adjustments and a clear plan for how to keep your newborn cool in the summer, this season can be entirely safe and stress-free. Don’t let the rising temperatures keep you from slowing down and preserving these beautiful milestone moments. Trust your baby’s first portraits to Oklahoma’s premier pediatric RN and safety-certified newborn photographer. Click here to contact Ashley McClintock Photography and secure your newborn session!