Houston (TX) monthly weather averages

Average daytime temperature

The bar chart below shows the average monthly peak daytime temperatures at Houston

Houston average temperature chart (Celsius) Houston average temperature chart (Fahrenheit)
Average monthly temperatures in Houston (degrees centigrade and fahrenheit)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
°C 15.2 17 21 24.8 27.9 31 32.5 32.5 29.8 26.1 21.1 16.9
°F 59.3 62.6 69.8 76.7 82.3 87.8 90.5 90.5 85.7 78.9 69.9 62.4

Please note: these are the average peak daytime temperatures (usually around mid-afternoon) so do not show daytime / night highs and lows. To see the daily range of temperatures have a look at the temperature max / min chart below.

Average rainfall & rainy days

The graph below shows the average rainfall and number of rainy days per month.

Houston monthly rainfall chart (mm) Houston monthly rainfall chart (inches)
Average monthly rainfall in Houston (mm and inches)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
mm 84 73 66 78 118 132 93 100 123 93 87 80
inches 3.3 2.9 2.6 3.1 4.6 5.2 3.7 3.9 4.8 3.7 3.4 3.1
Rainy days 10 8 9 6 8 8 9 9 9 7 8 9

Average daily sunshine

The bar chart below shows the average daily sunshine hours in Houston

Houston average daily sunshine chart
Average daily sunshine Houston
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Hrs sunshine 5 6 6.8 7.5 8.6 10.1 10.3 9.5 8.4 8 6.1 5.2

Day / night temperatures

The graph below shows the daily range of temperatures for each month.

Houston average minimum / maximum temperatures (Celsius) Houston average minimum / maximum temperatures (Fahrenheit)
Maximum and minimum daily temperatures in Houston (degrees centigrade and fahrenheit)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Min °C 6.4 7.8 11.8 16.2 19.5 22.6 23.7 23.7 21.4 16.3 11.7 7.7
Max °C 15.4 17.3 21.2 25.1 28.2 31.2 32.7 32.7 30.1 26.3 21.3 17.1
Min °F 43.5 46 53.2 61.1 67 72.7 74.7 74.7 70.4 61.3 53.1 45.9
Max °F 51.6 54.5 61.7 69.1 74.8 80.4 82.8 82.8 78.3 70.3 61.7 54.3

Sea temperature

The graph below shows the average sea temperature.

Houston average sea temperature chart (Celsius) Houston average sea temperature chart (Fahrenheit)
Average sea temperature around Houston in degrees centigrade and fahrenheit
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
°C 18 17.4 18.6 21.1 24.6 28 29.3 29.6 28.8 26.1 22.7 20
°F 64.4 63.3 65.4 70 76.4 82.3 84.7 85.3 83.8 78.9 72.9 68

Wind speed

The graph below shows the average wind speed.

Houston average winspeed by month (km/h) Houston average winspeed by month (mph)
Average wind speed in Houston (mph and kmh)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
km/h 16 17 18 17 16 14 13 12 13 13 15 15
mph 10 10 11 11 10 9 8 7 8 8 9 9

A monthly average windspeed of over 16km/h or 10mph suggests a location is fairly windy.

Relative humidity

The graph below shows the average relative humidity.

Houston relative humidity averages
Average relative humidity in Houston
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
76% 74% 74% 74% 76% 76% 75% 75% 77% 75% 76% 77%

Other monthly averages

UV index Best time to go?

Houston weather stats

Houston weather statistics
Hottest month: July 32.5°C 90.5°F
Driest month: March 66mm 2.6ins
Sunniest month: July 10.3hrs
Coldest month: January 15.2°C 59.4°F
Wettest month: June 132mm 5.2ins
Warmest sea: August 29.6°C 85.3°F
Map showing location of Houston (29.76328, -95.36327)

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