2021 will end warm & muggy in San Antonio

But a strong cold front is right around the corner...

A strong cold front arriving Saturday evening will drop temperatures nearly 30 degrees from Saturday to Sunday (Copyright 2021 by KSAT - All rights reserved.)

No, your mind hasn’t been playing tricks on you. It’s been a really warm December, with high temperatures trending some 15° above average for this high this time of year recently.

With an official high of 77° in San Antonio, Christmas 2021 tied with Christmas 2005 for the 2nd warmest Christmas in the past 50 years!

Apart from dense morning fog in spots, there will be very few weather-related problems if you or your loved ones plan on traveling across the state of Texas through New Year’s Eve. And if you’re hoping for colder weather, a strong cold front is set to arrive the first weekend of 2022.

Here’s what you need to know:


  • There won’t be much change to our weather on Wednesday: unseasonably warm with afternoon sun
  • Thursday will still be a warm day, but humidity will be down slightly - especially in the morning


  • It’ll still be very warm with highs near 80° both Friday and Saturday
  • As we ring in 2022 Friday night, temperatures will be in the mid- to upper 60s and it will be muggy
It will be warm and humid Friday for New Year's Eve (Copyright 2021 by KSAT - All rights reserved.)


  • A strong cold front will arrive late in the day Saturday
  • This front will result in a significant temperature swing - from the low 80s on New Year’s Day to the 50s on January 2nd


  • Believe it or not, it’s not hit freezing yet at San Antonio International Airport
  • However, behind this weekend’s cold front, San Antonio could register its first light freeze Sunday night/early Monday morning


The latest Planning Forecast for the San Antonio area (Copyright 2021 by KSAT - All rights reserved.)


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About the Authors:

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.

Kaiti Blake is a child weather-geek-turned-meteorologist. A member of the KSAT Weather Authority, Kaiti is a co-host of the Whatever the Weather video podcast. After graduating from Texas Tech University, Kaiti worked at WJTV 12 in Jackson, Mississippi and KTAB in Abilene.