Last updated: August 27, 2025
In September, the average temperature in Sao Marcos da Serra, Portugal is a comfortable 22°C (73°F). Expect a wide range, with minimums dropping to 11°C (52°F) and maximums soaring to 37°C (98°F). Visitors should also prepare for a bit of moisture, as the region experiences 8 mm (0.3 in) of precipitation over just 1 day. With an average humidity level of 71%, it's a great time to enjoy the unique climate of this location!
In September in Sao Marcos da Serra, the average temperature is 22°C (73°F), with maximums reaching up to 37°C (98°F) and minimums dipping as low as 11°C (52°F). This range makes it an ideal time for travelers looking to enjoy a mix of warm sunshine and cooler evenings.
In Sao Marcos da Serra in September, the precipitation amount is 8 mm (0.3 in) over the course of 1 day.
In Sao Marcos da Serra in September humidity is 71%. With an average temperature of 22°C (73°F), this humidity feels like a thick, warm blanket wrapping around you, making travel feel a bit sluggish but still pleasant as long as you stay hydrated and take breaks in the shade.
In Sao Marcos da Serra in September, the maximum UV index is 9, which corresponds to a very high Exposure Category. The time to burn is just 15 minutes, so it's essential to take precautions. For detailed information, you can check the Hourly UV Index in Sao Marcos da Serra.
UV Risk Categories
Weather in Sao Marcos da Serra varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Sao Marcos da Serra, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | 10°C (51°F) | 24 mm (0.9 inches) | 80% | moderate |
| February Weather | 12°C (55°F) | 44 mm (1.7 inches) | 73% | moderate |
| March Weather | 14°C (57°F) | 78 mm (3.1 inches) | 71% | high |
| April Weather | 15°C (60°F) | 65 mm (2.5 inches) | 69% | very high |
| May Weather | 19°C (66°F) | 23 mm (0.9 inches) | 69% | very high |
| June Weather | 21°C (69°F) | 8 mm (0.3 inches) | 67% | extreme |
| July Weather | 23°C (74°F) | 3 mm (0.1 inches) | 69% | very high |
| August Weather | 24°C (75°F) | 1 mm (0.0 inches) | 68% | very high |
| September Weather | 22°C (73°F) | 8 mm (0.3 inches) | 71% | very high |
| October Weather | 19°C (67°F) | 32 mm (1.2 inches) | 75% | high |
| November Weather | 14°C (58°F) | 49 mm (1.9 inches) | 78% | moderate |
| December Weather | 12°C (54°F) | 45 mm (1.8 inches) | 81% | moderate |