September Weather in Fontelo, Portugal

Last updated: August 27, 2025

In September, the average temperature in Fontelo, Portugal is a pleasant 18°C (65°F). Expect a range that can dip to a minimum of 7°C (45°F) and soar up to a maximum of 32°C (90°F). Rainfall is moderate, with an average precipitation of 42 mm (1.7 in) spread over about 6 days. Additionally, enjoy a relatively high average humidity of 71%, adding to the overall climate experience.

September Temperature in Fontelo

In September in Fontelo, the average temperature is 18°C (65°F). The maximum can reach 32°C (90°F), and the minimum can be as low as 7°C (45°F). It’s a great time to explore Fontelo, so pack layers to prepare for the temperature variations!

September Weather in Fontelo: Daily Temperature Highs, Lows, and Averages

The chart illustrates September temperature patterns in Fontelo, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Fontelo, September typically has an average temperature of 18°C (65°F), with highs reaching up to 32°C (90°F) and lows dropping to around 7°C (45°F).

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

September Precipitation in Fontelo

In Fontelo in September, the total precipitation amount is 42 mm (1.7 in) spread over 6 days.

September Precipitation Trends in Fontelo

The chart displays monthly precipitation patterns in Fontelo, 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 Fontelo, September typically receives around 42 mm (1.7 inches) of precipitation spread over approximately 6 days.

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

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Millimeters (mm) Inches (in)

September Humidity in Fontelo

In Fontelo in September humidity is 71%. With an average temperature of 18°C (65°F), this humidity feels like a warm embrace, making it a bit sticky and muggy, which can be slightly uncomfortable for traveling, especially if you're engaging in outdoor activities or exploring the city on foot.

September Average Humidity in Fontelo

This chart illustrates the average monthly humidity levels in Fontelo, 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 Fontelo is approximately 71%, 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 Fontelo

In Fontelo 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 Fontelo.

Maximum UV Index Levels in Fontelo for September

The chart shows the monthly maximum UV Index (UVI) for Fontelo 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 Fontelo typically reaches 8, which falls under the very high exposure category.

Data source: Fontelo 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 Fontelo Compares to Other Months

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

This table compares monthly weather conditions in Fontelo, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	5°C (42°F)	55 mm (2.2 inches)	87%	moderate
February Weather	8°C (47°F)	98 mm (3.9 inches)	81%	moderate
March Weather	9°C (49°F)	113 mm (4.4 inches)	78%	high
April Weather	12°C (53°F)	115 mm (4.5 inches)	79%	very high
May Weather	15°C (60°F)	51 mm (2.0 inches)	78%	very high
June Weather	17°C (64°F)	46 mm (1.8 inches)	71%	extreme
July Weather	20°C (69°F)	22 mm (0.9 inches)	63%	very high
August Weather	20°C (69°F)	18 mm (0.7 inches)	64%	very high
September Weather	18°C (65°F)	42 mm (1.7 inches)	71%	very high
October Weather	14°C (58°F)	78 mm (3.1 inches)	79%	high
November Weather	9°C (49°F)	103 mm (4.1 inches)	86%	moderate
December Weather	7°C (45°F)	125 mm (4.9 inches)	87%	low