September Weather in La Union, Spain

Last updated: August 27, 2025

In La Union, Spain, the average temperature in September hovers around 24°C (76°F), making it a pleasant month to explore. You'll experience temperatures ranging from a comfortable 19°C (66°F) to a warm 29°C (84°F). While you might see some rain with an average precipitation of 49 mm (1.9 in) spread across 4 days, the average humidity sits at a mild 70%. Enjoy your time in this inviting climate!

September Temperature in La Union

In September in La Union, the average temperature is 24°C (76°F). Maximums can reach 29°C (84°F), and minimums can be as low as 19°C (66°F). This mild and pleasant weather makes it an ideal time for travelers to explore the beauty of La Union.

September Weather in La Union: Daily Temperature Highs, Lows, and Averages

The chart illustrates September temperature patterns in La Union, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In La Union, September typically has an average temperature of 24°C (76°F), with highs reaching up to 29°C (84°F) and lows dropping to around 19°C (66°F).

Data source: Temperature data for La Union generated using information from the Copernicus Climate Change Service.

September Precipitation in La Union

In La Union in September, the total precipitation amount is 49 mm (1.9 in) spread over a duration of 4 days.

September Precipitation Trends in La Union

The chart displays monthly precipitation patterns in La Union, with values for each month alongside September’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how September’s conditions compare to those of other months. In La Union, September typically receives around 49 mm (1.9 inches) of precipitation spread over approximately 4 days.

Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.

Choose your preferred precipitation unit

Millimeters (mm) Inches (in)

September Humidity in La Union

In La Union in September, humidity is 70%. With an average temperature of 24°C (76°F), this humidity feels like a warm, enveloping blanket that can make outdoor activities feel a bit sticky and heavier, so travelers should stay hydrated and take regular breaks to enjoy the sights comfortably.

September Average Humidity in La Union

This chart illustrates the average monthly humidity levels in La Union, with September’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In September, average humidity in La Union is approximately 70%, offering insight into how humid the weather typically is during this month.

Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in La Union

In La Union in September, the maximum UV index is 8, which corresponds to a very high Exposure Category. This means that the time to burn is only 15 minutes. For more detailed information, you can refer to the Hourly UV Index in La Union.

Maximum UV Index Levels in La Union for September

The chart shows the monthly maximum UV Index (UVI) for La Union in September, representing the highest UV radiation level. The UVI measures the intensity of ultraviolet radiation from the sun, indicating the potential risk of sunburn and UV-related health issues. In September, the maximum UV index in La Union typically reaches 8, which falls under the very high exposure category.

Data source: La Union September UVI data generated using information from the Copernicus Climate Change Service.

UV Risk Categories

Extreme (11+): Avoid the sun, stay in shade.
Very High (8-10): Limit sun exposure.
High (6-7): Use SPF 30+ and protective clothing.
Moderate (3-5): Midday shade recommended.
Low (0-2): No protection needed.

How September Weather in La Union Compares to Other Months

Weather in La Union varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in La Union, focusing on differences in temperature, rainfall, humidity, and UV levels.

This table compares monthly weather conditions in La Union, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	13°C (56°F)	48 mm (1.9 inches)	72%	moderate
February Weather	14°C (57°F)	9 mm (0.4 inches)	71%	moderate
March Weather	14°C (58°F)	44 mm (1.7 inches)	69%	high
April Weather	15°C (60°F)	44 mm (1.7 inches)	66%	very high
May Weather	18°C (66°F)	18 mm (0.7 inches)	64%	very high
June Weather	22°C (71°F)	9 mm (0.4 inches)	65%	extreme
July Weather	24°C (76°F)	1 mm (0.0 inches)	71%	extreme
August Weather	26°C (79°F)	10 mm (0.4 inches)	69%	very high
September Weather	24°C (76°F)	49 mm (1.9 inches)	70%	very high
October Weather	21°C (70°F)	32 mm (1.3 inches)	74%	high
November Weather	17°C (63°F)	43 mm (1.7 inches)	72%	moderate
December Weather	15°C (59°F)	20 mm (0.8 inches)	74%	moderate