Last updated: March 2, 2024
The weather in Sao Mateus, Portugal, during September is characterized by an average temperature of 22°C (71°F). Highs can soar to 24°C (75°F), while lows may dip to 19°C (67°F). Typically, the humidity level in Sao Mateus throughout September hovers around 82%.
Minimum temperature
Average temperature
Maximum temperature
Humidity
In September, Sao Mateus averages 45 mm (1.8 inches) of rainfall, typically over the course of 10 rainy days. The month enjoys an average of 12 hours 23 minutes of daylight, with the sun shining for approximately 10 hours 34 minutes each day. Additionally, there is a 40% probability of sunny days during this period.
Precipitation
Rainy days
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Chance of sun
In September, the UV Index in Sao Mateus reaches a maximum of 9, indicating a level of VeryHigh exposure. The most intense UV radiation typically occurs between 13:00 and 15:00, during which unprotected skin may burn in as little as 15 minutes.
| 07:00 | 08:00 | 09:00 | 10:00 | 11:00 | 12:00 | 13:00 | 14:00 | 15:00 | 16:00 | 17:00 | 18:00 | 19:00 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| UVI | 0 | 1 | 1 | 3 | 5 | 7 | 8 | 8 | 7 | 6 | 4 | 2 | 1 |
| Exposure | Low | Moderate | High | VeryHigh | High | Moderate | Low | ||||||
| Time to burn | 45 min | 30 min | 25 min | 15 min | 25 min | 30 min | 45 min | ||||||