Houston - Hottest Decades





Ranked here are the hottest decades on record for Houston, Texas. The lists include decades when Houston had the highest average temperatures, the most hot days and the fewest cold days. These extremes are for temperatures observed at the William P. Hobby Airport near downtown Houston and cover seven decades, from the 1950s to the 2010s.

That is when Houston had weather measurements that are consistent and complete enough to compare decades. Each decade comprises a standard 10-year range. For instance, the 1990s includes measurements from Jan 1, 1990 to Dec 31, 1999. An exception is the 2010s which so far includes data to the end of 2018. Links to the data behind these lists are in the References section on this page.

Hottest High Temperatures

Average daily maximum temperature at Houston
High °F Decade High °C
Highest 80.3 2010s 26.8
Runner-up 79.6 2000s 26.4

Warmest Low Temperatures

Average daily minimum temperature at Houston
Low °F Decade Low °C
Highest 62.6 2010s 17.0
Runner-up 62.0 2000s 16.7

Most Warm Days

Total days per year on average when Houston had temperatures of at least 70 °F (21 °C)
Days Decade
Highest 292 2010s
Runner-up 291 2000s

Most Hot Days

Total days per year on average when Houston had temperatures of at least 90 °F (32 °C)
Days Decade
Highest 106 2010s
Runner-up 97 2000s, 1960s

Fewest Freezing Days

Total days per year on average when Houston had temperatures of 32 °F (0 °C) or lower
Days Decade
Lowest 3 2000s
Runner-up 4 1990s

How Much Hotter are 2010s?

Compared with averages for the previous 50 years (1960 to 2009), the 2010s in Houston had:

  • 14 more days each year with temperatures of 90 °F and higher
  • 1.4 °F higher daily maximum temperatures (0.8 °C)
  • 1.9 °F higher daily minimum temperatures (1.0 °C)
References

Current Results. 2019. Houston TX Temperature Averages by Decade

Jay Lawrimore, Ron Ray, Scott Applequist, Bryant Korzeniewski, Matthew Menne. 2016. Global Summary of the Year, Version 1.0. NOAA National Centers for Environmental Information.

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