If you’ve been yawning a lot lately, it could be due to the weather.
Scientists have figured out that we yawn more when we are warm and the air is cool. 68 degrees is peak yawning temperature. They call it the thermal window for yawning, which occurs when our brains are heating up. The cooler temperature outside the body can trigger a yawn to deliver some fresh air to our warm brain and cool it down.
So what does yawning have to do with being tired or bored? Sleepiness and lack of stimulation can cause your brain temperature to rise and a shot of cool air could be just what it needs.
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