Last updated: August 23, 2025
In September, the average temperature in Portes-les-Valence, France hovers around 18°C (64°F). Expect a comfortable range, with minimums dipping to 5°C (41°F) and maximums soaring to 32°C (91°F). With an average precipitation of 46 mm (1.8 in) spread across 7 days, staying hydrated is key, as humidity tends to linger at around 72%. Enjoy the blend of warmth and occasional showers!
In September in Portes-les-Valence, the average temperature is 18°C (64°F). Maximums can reach up to 32°C (91°F) and minimums can drop as low as 5°C (41°F). This range makes it an ideal time for travelers to enjoy a variety of outdoor activities while comfortably experiencing the local culture.
In Portes-les-Valence in September, the precipitation amount is 46 mm (1.8 in) over the course of 7 days.
In Portes-les-Valence in September, humidity is 72%. With an average temperature of 18°C (64°F), this humidity feels like a warm, sticky embrace, making travel somewhat uncomfortable as the air clings to your skin, leaving you longing for a refreshing breeze.
In Portes-les-Valence in September, the maximum UV index is 7, which corresponds to the high Exposure Category. This means that the time to burn is approximately 25 minutes. For more detailed information, you can check the Hourly UV Index in Portes-les-Valence.
UV Risk Categories
Weather in Portes-les-Valence varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Portes-les-Valence, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | 3°C (39°F) | 49 mm (1.9 inches) | 91% | low |
| February Weather | 6°C (43°F) | 46 mm (1.8 inches) | 88% | moderate |
| March Weather | 8°C (47°F) | 67 mm (2.6 inches) | 84% | moderate |
| April Weather | 11°C (53°F) | 63 mm (2.5 inches) | 81% | high |
| May Weather | 15°C (60°F) | 109 mm (4.3 inches) | 77% | very high |
| June Weather | 20°C (68°F) | 75 mm (2.9 inches) | 76% | very high |
| July Weather | 22°C (72°F) | 71 mm (2.8 inches) | 68% | very high |
| August Weather | 22°C (72°F) | 53 mm (2.1 inches) | 61% | very high |
| September Weather | 18°C (64°F) | 46 mm (1.8 inches) | 72% | high |
| October Weather | 13°C (55°F) | 101 mm (4.0 inches) | 88% | moderate |
| November Weather | 8°C (46°F) | 101 mm (4.0 inches) | 91% | moderate |
| December Weather | 5°C (41°F) | 94 mm (3.7 inches) | 92% | low |