Port Isabel (TX) monthly weather averages

Contents

Average daytime temperature

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

Port Isabel average temperature chart (Celsius) Port Isabel average temperature chart (Fahrenheit)
Average monthly temperatures in Port Isabel (degrees centigrade and fahrenheit)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
°C 20.1 21.9 25.4 28.4 30.6 32.5 33.7 33.8 32.2 29.3 25.3 21.7
°F 68.2 71.5 77.7 83.2 87.2 90.5 92.6 92.9 89.9 84.8 77.6 71.1

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.

Port Isabel monthly rainfall chart (mm) Port Isabel monthly rainfall chart (inches)
Average monthly rainfall in Port Isabel (mm and inches)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
mm 41 33 21 41 68 79 47 66 144 83 40 40
inches 1.6 1.3 0.8 1.6 2.7 3.1 1.9 2.6 5.7 3.2 1.6 1.6
Rainy days 8 6 4 3 5 6 5 7 10 6 5 6

Average annual rainfall in Port Isabel: 632.333mm (249 inches)

Average daily sunshine

The bar chart below shows the average daily sunshine hours in Port Isabel

Port Isabel average daily sunshine chart
Average daily sunshine Port Isabel
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Hrs sunshine 4.6 5.8 7 8 8.9 10.7 11.3 10.3 8.8 7.8 6 4.6

Day / night temperatures

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

Port Isabel average minimum / maximum temperatures (Celsius) Port Isabel average minimum / maximum temperatures (Fahrenheit)
Maximum and minimum daily temperatures in Port Isabel (degrees centigrade and fahrenheit)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Min °C 9.9 11.4 15.2 19.2 22.2 23.9 24.3 24.2 23 19 15 11.3
Max °C 20.4 22.2 25.7 28.7 30.9 32.7 33.9 34.1 32.4 29.6 25.6 22
Min °F 49.7 52.5 59.3 66.5 71.9 75 75.7 75.5 73.4 66.2 59 52.3
Max °F 59.2 62.2 68.7 75 79.7 82.9 84.4 84.4 81.9 75.7 68.5 61.9

Sea temperature

The graph below shows the average sea temperature.

Port Isabel average sea temperature chart (Celsius) Port Isabel average sea temperature chart (Fahrenheit)
Average sea temperature around Port Isabel in degrees centigrade and fahrenheit
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
°C 20.6 19.8 20.2 22.2 25.2 27.8 28.4 28.8 28.8 27.1 24.4 22.1
°F 69.1 67.6 68.3 71.9 77.4 82 83.2 83.9 83.8 80.8 75.8 71.9

Wind speed

The graph below shows the average wind speed.

Port Isabel average winspeed by month (km/h) Port Isabel average winspeed by month (mph)
Average wind speed in Port Isabel (mph and kmh)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
km/h 18 19 22 22 20 18 17 16 15 15 17 17
mph 11 12 14 14 12 11 11 10 9 9 11 11

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.

Port Isabel relative humidity averages
Average relative humidity in Port Isabel
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
79% 77% 75% 75% 77% 76% 74% 75% 76% 75% 76% 78%

Other monthly averages

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Beta

Current (hourly) weather 15 day forecast

Port Isabel weather stats

Port Isabel weather statistics
Hottest month: July 33.7°C 92.7°F
Driest month: March 21mm 0.8ins
Sunniest month: July 11.3hrs
Coldest month: January 20.1°C 68.2°F
Wettest month: September 144mm 5.7ins
Warmest sea: August 28.8°C 83.8°F
Map showing location of Port Isabel (26.07341, -97.20858) Port Isabel map pin © Google

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