Last updated: August 23, 2025
In Boulogne-sur-Gesse, France, the average temperature in September hovers around 18°C (66°F). However, temperatures can vary significantly, dipping as low as 7°C (44°F) and soaring up to 34°C (93°F). Visitors should also prepare for some rain, with an average precipitation of 74 mm (2.9 in) over 11 days. The region experiences an average humidity of 73%, making it feel quite comfortable.
In September in Boulogne-sur-Gesse, the average temperature is 18°C (66°F). Maximum temperatures can reach 34°C (93°F), while the minimum can drop as low as 7°C (44°F). This makes Boulogne-sur-Gesse a perfect destination for travelers seeking a pleasant climate with a wide range of temperatures.
In Boulogne-sur-Gesse in September, the precipitation amount is 74 mm (2.9 in) spread over the course of 11 days.
In Boulogne-sur-Gesse in September, humidity is 73%. With an average temperature of 18°C (66°F), this humidity feels like a warm and sticky embrace, making travel somewhat uncomfortable as the air feels heavy, and you may find yourself longing for a refreshing breeze.
In Boulogne-sur-Gesse 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 Boulogne-sur-Gesse.
UV Risk Categories
Weather in Boulogne-sur-Gesse varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Boulogne-sur-Gesse, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | 5°C (42°F) | 82 mm (3.2 inches) | 87% | low |
| February Weather | 8°C (47°F) | 80 mm (3.1 inches) | 83% | moderate |
| March Weather | 10°C (50°F) | 81 mm (3.2 inches) | 80% | high |
| April Weather | 12°C (54°F) | 94 mm (3.7 inches) | 77% | high |
| May Weather | 16°C (60°F) | 111 mm (4.4 inches) | 75% | very high |
| June Weather | 19°C (67°F) | 112 mm (4.4 inches) | 74% | very high |
| July Weather | 21°C (71°F) | 75 mm (2.9 inches) | 72% | very high |
| August Weather | 21°C (71°F) | 68 mm (2.7 inches) | 70% | very high |
| September Weather | 18°C (66°F) | 74 mm (2.9 inches) | 73% | high |
| October Weather | 14°C (58°F) | 84 mm (3.3 inches) | 82% | moderate |
| November Weather | 9°C (48°F) | 98 mm (3.9 inches) | 87% | moderate |
| December Weather | 7°C (46°F) | 134 mm (5.3 inches) | 88% | low |