Port Isabel (TX) Weather and Climate: A Comprehensive Guide
The temperature in Port Isabel can vary greatly throughout the year.
The temperatures shift from very warm
to pleasant.
It receives a reasonable amount of rainfall.
Now, let’s break down all the climate details for a clearer picture.
Average maximum day and minimum night temperature
Depending on the time of the year, temperatures range from very warm to pleasant in Port Isabel. Average daytime temperatures reach a very warm 33°C in August. In January, the coolest month of the year, temperatures drop to a pleasant 20°C.
At night, you can expect cooler temperatures, with averages dropping to around 12°C during this month. Check out our detailed temperature page for more information.Temperature ranges by month
Precipitation and rainy days
Generally, Port Isabel has a moderate amount of precipitation, averaging 687 mm of rainfall annually. Port Isabel can be quite wet during September, receiving approximately 171 mm of precipitation over 14 rainy days. In contrast August, experiences much drier conditions, with 25 mm of rainfall, spread across 6 rainy days. For more details, please visit our Port Isabel Precipitation page.The mean monthly precipitation over the year, including rain, hail and snow
The average number of days each month with precipitation
Sunshine over the year
Port Isabel can be enjoyed more throughout the sunniest month of July under a blue sky, with approximately 10.9 hours of sunshine daily. In contrast, the city experiences much darker days in January, with only 4.4 hours of sunlight per day. Visit our detailed sunshine hours page for more information.Monthly hours of sunshine
Daily hours of sunshine
Daily percentage of sunshine
Average humidity
The relative humidity is high throughout the year in Port Isabel.
The city experiences its highest humidity in January, reaching 78%. In July, the humidity drops to its lowest level at 73%. Explore our detailed page on humidity levels for further details.
Relative humidity over the year
partly cloudy and no rain partly cloudy and chance of slight rain partly cloudy and small chance of slight rainForecast for Port Isabel (TX)
8 m/s
7 m/s
3 m/s
The best time of year to visit Port Isabel in the United States of America
During the months of February, March, November and December you are most likely to experience good weather with pleasant average temperatures that fall between 20°C and 26°C.Other facts from our historical weather data:
August has an average maximum temperature of 33°C and is the warmest month of the year.
The coldest month is January with an average maximum temperature of 20°C.
September tops the wettest month list with 171 mm of rainfall.
August is the driest month with 25 mm of precipitation.
July is the sunniest month with an average of 326 hours of sunshine.
No idea where to travel to this year? We have a tool that recommends destinations based on your ideal conditions. Find out where to go with our weather planner.
