Harlingen Weather in September

September in Harlingen brings very high temperatures around 33°C (91°F) during the day, dropping to 23°C (73°F) at night, with the most rainfall of the year.

Rainfall in Harlingen in September

It's the month with the heaviest rainfall, so an umbrella is a must to navigate the wet weather. Rain is expected on roughly 13 days, totalling around 140 mm (5.5 in) for the month. When showers do arrive, they tend to be on the heavier side. Worth being prepared even if rain days are not that numerous.

Temperature in Harlingen in September

September in Harlingen sees highs of 33°C (91°F) and lows of 23°C (73°F) overnight. For most visitors, the main thing to prepare for is the heat during the day. With overnight lows of 23°C (73°F), evenings stay pleasantly warm.

Sunshine in Harlingen in September

The days are predominantly sunny, with an estimated total of around 246 hours of sunshine. These sun-filled days are perfect for playing sports, visiting parks, or going for a bike ride.

September in Harlingen can still be great, but if you prefer pleasant temperatures along with dry and sunny conditions, our weather planner can help you explore other options in the world.