Harlingen (TX) Weather & Climate: Best Time to Visit
Average temperatures, rainfall, sunshine and the best time to visit Harlingen.
Climate overview of Harlingen
Harlingen, Texas, United States of America, experiences significant temperature variation throughout the year. Summers bring daytime highs of 36°C (97°F) in August, while winters cool to 21°C (70°F) in January.
The city receives around 703 mm (28 in) of rainfall per year. It experiences a distinct dry season from January to March, with very hot summers and pleasant winters. September is the wettest month and February the driest. July is the sunniest month, averaging 10.9 hours of sunshine per day.
Harlingen Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in Harlingen - and find the best time to visit.
Monthly Temperature in Harlingen
Depending on the time of the year, temperatures range from very hot to pleasant in Harlingen. On average, daytime temperatures range from a very hot 36°C (97°F) in August to a pleasant 21°C (70°F) in January.
Nighttime temperatures range from 25°C (77°F) in August to 9°C (48°F) in January.
Check out our detailed temperature page for more information.
Temperature ranges by month
Rainfall in Harlingen
Generally, Harlingen has a moderate amount of precipitation, averaging 703 mm (28 in) of rainfall annually. The seasons in Harlingen bring significant changes in precipitation. The wettest month, September, receives high rainfall, with an average of 140 mm (5.5 in) of precipitation. This rainfall is distributed across 13 rainy days.
In contrast, the driest month, February, experiences much less rainfall, totaling 25 mm (1 in) over 5 rainy days. These distinct seasonal differences provide diverse experiences throughout the year. For more details, please visit our Harlingen Precipitation page.
The mean monthly precipitation over the year, including rain, hail, and snow
The average number of days each month with precipitation
Sunshine Hours in Harlingen
In Harlingen, summer days are longer and more sunny, with daily sunshine hours peaking at 10.9 hours in July. As the darker season arrives, the brightness of the sun becomes less. January sees a soft sun for only 4.4 hours per average day.
Visit our detailed sunshine hours page for more information.
Monthly hours of sunshine
Daily hours of sunshine
Daily percentage of sunshine
Humidity in Harlingen by Month
The relative humidity is high throughout the year in Harlingen.
The city experiences its highest humidity in January, reaching 78%. In July, the humidity drops to its lowest level at 73%. What does this mean? Read our detailed page on humidity levels for further details.
Relative humidity over the year
Best Time to Visit Harlingen
Monthly ratings reflect general weather comfort, based on daytime temperature and rainfall. Swimming and winter conditions are highlighted separately where relevant.
- Best overall: January, February, March, November and December
- Warmest weather: June, July and August
- Most sunshine: July
- Wettest months: September, when rainfall is highest.
- Seasonal pattern: A distinct dry season from January to March, with very hot summers and pleasant winters
Frequently asked questions about the climate in Harlingen
What is the best time to visit Harlingen?
January, February, March, November and December typically offer the most optimal weather in Harlingen. In contrast, June, July, August and September tend to have less optimal conditions. Harlingen has a distinct dry season from January to March, with very hot summers and pleasant winters.
What temperatures can I expect in Harlingen?
Daytime highs range from 21°C (70°F) in January to 36°C (97°F) in August. Nighttime lows range from 9°C (48°F) to 25°C (77°F). Temperatures vary considerably through the year.
How much rain does Harlingen get?
Annual rainfall is around 703 mm (28 in). September is the wettest month with 140 mm (5.5 in), while February is the driest with 25 mm (1 in).
How sunny is Harlingen?
Harlingen receives around 2,715 hours of sunshine per year. July is the sunniest month with 326 hours, while January is the cloudiest with just 133 hours. Overall, Harlingen enjoys abundant sunshine.
Harlingen 3-Day Forecast
Harlingen on the map
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