September Weather in Unhais-o-Velho, Portugal

Last updated: August 27, 2025

In September, the average temperature in Unhais-o-Velho, Portugal hovers around 19°C (66°F), offering a pleasant climate. Expect minimum temperatures dipping to 7°C (45°F) and peaks soaring to 33°C (92°F). With an average humidity of 71% and 48 mm (1.9 in) of precipitation over just 5 days, be prepared for a refreshing mix of sun and occasional showers.

September Temperature in Unhais-o-Velho

In September in Unhais-o-Velho, the average temperature is 19°C (66°F). Maximum temperatures can reach 33°C (92°F), while the minimum can drop to as low as 7°C (45°F). This variation makes it a great time to explore outdoor activities while packing for fluctuating temperatures.

September Weather in Unhais-o-Velho: Daily Temperature Highs, Lows, and Averages

The chart illustrates September temperature patterns in Unhais-o-Velho, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Unhais-o-Velho, September typically has an average temperature of 19°C (66°F), with highs reaching up to 33°C (92°F) and lows dropping to around 7°C (45°F).

Data source: Temperature data for Unhais-o-Velho generated using information from the Copernicus Climate Change Service.

September Precipitation in Unhais-o-Velho

In Unhais-o-Velho in September, the precipitation amount is 48 mm (1.9 in) spread over the course of 5 days.

September Precipitation Trends in Unhais-o-Velho

The chart displays monthly precipitation patterns in Unhais-o-Velho, 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 Unhais-o-Velho, September typically receives around 48 mm (1.9 inches) of precipitation spread over approximately 5 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 Unhais-o-Velho

In Unhais-o-Velho in September humidity is 71%. With an average temperature of 19°C (66°F), this humidity feels like a warm, balmy embrace that enhances the tropical atmosphere, making it a perfect backdrop for leisurely strolls and outdoor adventures, though it may also lead to a slightly sticky feeling as you explore.

September Average Humidity in Unhais-o-Velho

This chart illustrates the average monthly humidity levels in Unhais-o-Velho, 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 Unhais-o-Velho 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 Unhais-o-Velho

In Unhais-o-Velho 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 Unhais-o-Velho.

Maximum UV Index Levels in Unhais-o-Velho for September

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

Data source: Unhais-o-Velho 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 Unhais-o-Velho Compares to Other Months

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

This table compares monthly weather conditions in Unhais-o-Velho, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	6°C (43°F)	64 mm (2.5 inches)	87%	moderate
February Weather	9°C (48°F)	104 mm (4.1 inches)	81%	moderate
March Weather	10°C (50°F)	135 mm (5.3 inches)	78%	high
April Weather	12°C (53°F)	138 mm (5.4 inches)	79%	very high
May Weather	16°C (60°F)	66 mm (2.6 inches)	78%	very high
June Weather	18°C (64°F)	41 mm (1.6 inches)	71%	extreme
July Weather	21°C (70°F)	15 mm (0.6 inches)	63%	very high
August Weather	21°C (70°F)	18 mm (0.7 inches)	64%	very high
September Weather	19°C (66°F)	48 mm (1.9 inches)	71%	very high
October Weather	15°C (59°F)	98 mm (3.9 inches)	79%	high
November Weather	10°C (50°F)	145 mm (5.7 inches)	86%	moderate
December Weather	8°C (47°F)	134 mm (5.3 inches)	87%	moderate