September Weather in Montalvinho, Portugal

Last updated: August 27, 2025

In September, the average temperature in Montalvinho, Portugal is a pleasant 22°C (71°F). However, be prepared for a range in temperatures, with minimums dipping to 9°C (48°F) and maximums soaring to 38°C (100°F). During this period, you can expect about 30 mm (1.2 in) of precipitation over 4 days, and an average humidity of 67%. Enjoy your time in this vibrant locale!

September Temperature in Montalvinho

In September in Montalvinho, the average temperature is 22°C (71°F), with maximums reaching 38°C (100°F) and minimums dropping as low as 9°C (48°F). Overall, it's a great time to visit Montalvinho to enjoy a mix of warm days and cooler nights.

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

The chart illustrates September temperature patterns in Montalvinho, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Montalvinho, September typically has an average temperature of 22°C (71°F), with highs reaching up to 38°C (100°F) and lows dropping to around 9°C (48°F).

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

September Precipitation in Montalvinho

In Montalvinho in September, the precipitation amount is 30 mm (1.2 in) over the course of 4 days.

September Precipitation Trends in Montalvinho

The chart displays monthly precipitation patterns in Montalvinho, 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 Montalvinho, September typically receives around 30 mm (1.2 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 Montalvinho

In Montalvinho in September, humidity is 67%. With an average temperature of 22°C (71°F), this humidity feels like a warm embrace, making outdoor activities enjoyable yet slightly uncomfortable, as the air hangs thick, reminding travelers to stay hydrated and seek shade during the midday sun.

September Average Humidity in Montalvinho

This chart illustrates the average monthly humidity levels in Montalvinho, 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 Montalvinho 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 Montalvinho

In Montalvinho 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 Montalvinho.

Maximum UV Index Levels in Montalvinho for September

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

Data source: Montalvinho 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 Montalvinho Compares to Other Months

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

This table compares monthly weather conditions in Montalvinho, 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 (49°F)	42 mm (1.7 inches)	85%	moderate
February Weather	12°C (53°F)	61 mm (2.4 inches)	75%	moderate
March Weather	13°C (55°F)	94 mm (3.7 inches)	72%	high
April Weather	15°C (59°F)	94 mm (3.7 inches)	70%	very high
May Weather	19°C (66°F)	46 mm (1.8 inches)	70%	very high
June Weather	20°C (69°F)	19 mm (0.7 inches)	63%	extreme
July Weather	23°C (73°F)	5 mm (0.2 inches)	60%	very high
August Weather	23°C (74°F)	7 mm (0.3 inches)	60%	very high
September Weather	22°C (71°F)	30 mm (1.2 inches)	67%	very high
October Weather	18°C (65°F)	63 mm (2.5 inches)	74%	high
November Weather	13°C (55°F)	94 mm (3.7 inches)	83%	moderate
December Weather	11°C (52°F)	68 mm (2.7 inches)	85%	moderate