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What makes some sunrises or sunsets so colorful?

Winter tends to be particularly beautiful around dawn and dusk

SAN ANTONIO – The last few sunsets in South Central Texas and San Antonio have been gorgeous! Check out some of the pictures sent in by KSAT 12 viewers.

WHY ARE SUNRISES/SUNSETS COLORFUL?

It’s all about the kindergarten staple of how light breaks down into different colors — ROYGBIV!

At sunset, when the sun is low on the horizon, the light scatters through more of the atmosphere than during the day. The longer wavelengths of red and orange light remain visible. Blue light, which has a shorter wavelength, is not visible because all of the particles are broken up.

Sunday Sunset near Canyon Lake
LaskowskiC

Sunday Sunset near Canyon Lake

San Antonio
Sunset 12-4-23 in Seguin.
Kathy Kern

Sunset 12-4-23 in Seguin.

San Antonio

DOES TIME OF YEAR MATTER?

Yes! In the winter, the sun angle is lower which means that sunrises and sunsets last a little longer. There’s also typically less water vapor, or humidity, in the air during the winter. This allows for more vibrant colors and less hazy skies.

Yet another golden hour sky.
SkyWatcher (Oscar)

Yet another golden hour sky.

San Antonio

WHAT TYPE OF CLOUDS MAKE FOR THE BEST VIEWING?

A scattering of mid-level and high-level clouds creates colorful sunrises and sunsets. This is because the higher clouds intercept the longer wavelength red and orange light as the sun is setting.

Vibrant Sunset in The Woodlands tonight
Denise Gavino

Vibrant Sunset in The Woodlands tonight

Houston
Old Town Helotes night of Tree Lighting 2023
lovera420

Old Town Helotes night of Tree Lighting 2023

San Antonio

About the Authors
Sarah Spivey headshot

Sarah Spivey is a San Antonio native who grew up watching KSAT. She has been a proud member of the KSAT Weather Authority Team since 2017. Sarah is a Clark High School and Texas A&M University graduate. She previously worked at KTEN News. When Sarah is not busy forecasting, she enjoys hanging out with her husband and cat, and playing music.

Justin Horne headshot

Justin Horne is a meteorologist and reporter for KSAT 12 News. When severe weather rolls through, Justin will hop in the KSAT 12 Storm Chaser to safely bring you the latest weather conditions from across South Texas. On top of delivering an accurate forecast, Justin often reports on one of his favorite topics: Texas history.

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