Why Does It Get Colder On Clear Nights?


By By Steve Pool

SEATTLE - It seems odd, but it usually gets colder at night from warm sunny days than cool, cloudy days.

That's because clouds can act like a blanket. The clouds can keep a good chunk of sunlight out during the day, keeping us cooler in the afternoons. But the clouds will also trap in whatever warmth we get during the day, keeping us warmer at night.

Thus, after a sunny and warm day where we might get to 55 during the day, a clear night will allow that heat to be radiated out back into space, dropping temperatures near freezing. While a cloudy and 45 degree day might only get down to the upper 30s at night.

Your Photos

YouNews Sunset Beach, Oak Harbor Sunset Beach, Oak Harbor
I took this photo tonight at 4:37. Just a calm and beautiful day on the Salish Sea.
YouNews Bordeaux & Paris Bordeaux & Paris

This is my UW daughter and her weekly video from Paris......I think she does a great job and would like to share with others.......especially touching seeing video of where the attacks happened and her feelings....a future news caster...