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September Weather in Montalegre, Portugal

Last updated: August 27, 2025

In Montalegre, Portugal, the average temperature in September is a pleasant 17°C (63°F). Expect a range that can dip to 4°C (40°F) and peak at 30°C (86°F). During this month, precipitation averages 42 mm (1.7 in) over 7 days, while the average humidity hovers around 71%. Enjoy the mild climate, but don't forget your umbrella!

September Temperature in Montalegre

In September in Montalegre, the average temperature is 17°C (63°F). Maximums can reach 30°C (86°F) and minimums can be as low as 4°C (40°F). This makes it an ideal time for travelers to enjoy a range of outdoor activities while still being prepared for cooler evenings.

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

The chart illustrates September temperature patterns in Montalegre, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Montalegre, September typically has an average temperature of 17°C (63°F), with highs reaching up to 30°C (86°F) and lows dropping to around 4°C (40°F).
JanFebMarAprMayJunJulAugSepOctNovDec414547515761666662564744
Data source: Temperature data for Montalegre generated using information from the Copernicus Climate Change Service.
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The average of daily temperatures (24 hours) calculated across all days in the month.

September Precipitation in Montalegre

In Montalegre in September, the total precipitation amount is 42 mm (1.7 in) over the course of 7 days.

September Precipitation Trends in Montalegre

The chart displays monthly precipitation patterns in Montalegre, 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 Montalegre, September typically receives around 42 mm (1.7 inches) of precipitation spread over approximately 7 days.
JanFebMarAprMayJunJulAugSepOctNovDec761271351197554272342104130170
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Montalegre

In Montalegre in September, humidity is 71%. With an average temperature of 17°C (63°F), this humidity feels like a warm embrace, making outdoor activities enjoyable yet a bit sticky, so travelers should stay hydrated and take breaks in the shade.

September Average Humidity in Montalegre

This chart illustrates the average monthly humidity levels in Montalegre, 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 Montalegre is approximately 71%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec87%81%78%79%78%71%63%64%71%79%86%87%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Montalegre

In Montalegre 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 Montalegre.

Maximum UV Index Levels in Montalegre for September

The chart shows the monthly maximum UV Index (UVI) for Montalegre 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 Montalegre typically reaches 8, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec246910111098642
Data source: Montalegre 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 Montalegre Compares to Other Months

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

This table compares monthly weather conditions in Montalegre, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather5°C (42°F)75 mm (3.0 inches)87%low
February Weather7°C (45°F)127 mm (5.0 inches)81%moderate
March Weather8°C (47°F)135 mm (5.3 inches)78%high
April Weather10°C (51°F)119 mm (4.7 inches)79%very high
May Weather14°C (58°F)75 mm (3.0 inches)78%very high
June Weather16°C (62°F)54 mm (2.1 inches)71%extreme
July Weather19°C (67°F)27 mm (1.0 inches)63%very high
August Weather19°C (67°F)23 mm (0.9 inches)64%very high
September Weather17°C (63°F)42 mm (1.7 inches)71%very high
October Weather13°C (56°F)104 mm (4.1 inches)79%high
November Weather8°C (47°F)130 mm (5.1 inches)86%moderate
December Weather7°C (44°F)170 mm (6.7 inches)87%low

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