September Weather in Nisa, Portugal

Last updated: August 27, 2025

In September, the average temperature in Nisa, Portugal hovers around 22°C (73°F), with temperatures ranging from a refreshing 9°C (49°F) to a scorching 38°C (100°F). Expect some light rainfall, with a total precipitation of about 33 mm (1.3 in) spread over 4 days. The air tends to be fairly humid, with an average humidity of 67%, creating a comfortable yet warm atmosphere.

September Temperature in Nisa

In September in Nisa, the average temperature is 22°C (73°F). Maximum temperatures can reach 38°C (100°F) and minimums can drop as low as 9°C (49°F). Be prepared for a wide range of temperatures and pack accordingly for your travels!

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

The chart illustrates September temperature patterns in Nisa, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Nisa, September typically has an average temperature of 22°C (73°F), with highs reaching up to 38°C (100°F) and lows dropping to around 9°C (49°F).

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

September Precipitation in Nisa

In Nisa in September, the precipitation amount is 33 mm (1.3 in) over a span of 4 days.

September Precipitation Trends in Nisa

The chart displays monthly precipitation patterns in Nisa, 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 Nisa, September typically receives around 33 mm (1.3 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 Nisa

In Nisa in September, humidity is 67%. With an average temperature of 22°C (73°F), this humidity feels like a warm, damp blanket enveloping you, making outdoor activities slightly uncomfortable but still bearable for travelers who enjoy a tropical atmosphere.

September Average Humidity in Nisa

This chart illustrates the average monthly humidity levels in Nisa, 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 Nisa is approximately 67%, 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 Nisa

In Nisa 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 Nisa.

Maximum UV Index Levels in Nisa for September

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

Data source: Nisa 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 Nisa Compares to Other Months

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

This table compares monthly weather conditions in Nisa, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	9°C (48°F)	42 mm (1.6 inches)	85%	moderate
February Weather	11°C (52°F)	57 mm (2.3 inches)	75%	moderate
March Weather	12°C (54°F)	97 mm (3.8 inches)	72%	high
April Weather	14°C (58°F)	92 mm (3.6 inches)	70%	very high
May Weather	19°C (66°F)	39 mm (1.5 inches)	70%	very high
June Weather	21°C (70°F)	15 mm (0.6 inches)	63%	extreme
July Weather	24°C (75°F)	5 mm (0.2 inches)	60%	very high
August Weather	25°C (77°F)	5 mm (0.2 inches)	60%	very high
September Weather	22°C (73°F)	33 mm (1.3 inches)	67%	very high
October Weather	18°C (65°F)	61 mm (2.4 inches)	74%	high
November Weather	13°C (55°F)	88 mm (3.5 inches)	83%	moderate
December Weather	10°C (51°F)	77 mm (3.0 inches)	85%	moderate