Last updated: August 23, 2025
In September, the average temperature in Sully-sur-Loire, France hovers around 17°C (64°F), providing a comfortable backdrop for outdoor activities. However, temperatures can fluctuate, with a minimum of 4°C (39°F) and a maximum reaching up to 36°C (97°F). Expect an average precipitation of 52 mm (2.1 in) spread across 7 days, complemented by a notable average humidity of 76%.
In September, in Sully-sur-Loire, the average temperature is 17°C (64°F). The maximum can reach 36°C (97°F), while the minimum can drop as low as 4°C (39°F). This range makes Sully-sur-Loire an ideal destination for those who enjoy varied weather and outdoor activities.
In Sully-sur-Loire in September, the precipitation amount is 52 mm (2.1 in) over the course of 7 days.
In Sully-sur-Loire in September, humidity is 76%. With an average temperature of 17°C (64°F), this humidity feels like a warm, sticky embrace that can make outdoor activities feel sluggish and draining, challenging travelers to stay hydrated and seek respite in shaded areas or air-conditioned spaces.
In Sully-sur-Loire in September, the maximum UV index is 6, which corresponds to a high Exposure Category. The time to burn is approximately 25 minutes. To find the hourly UV index in Sully-sur-Loire, you can refer to this Hourly UV Index in Sully-sur-Loire.
UV Risk Categories
Weather in Sully-sur-Loire varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Sully-sur-Loire, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | 5°C (40°F) | 67 mm (2.6 inches) | 90% | low |
| February Weather | 6°C (44°F) | 64 mm (2.5 inches) | 88% | moderate |
| March Weather | 9°C (48°F) | 72 mm (2.8 inches) | 85% | moderate |
| April Weather | 12°C (53°F) | 36 mm (1.4 inches) | 83% | high |
| May Weather | 15°C (59°F) | 83 mm (3.3 inches) | 83% | very high |
| June Weather | 20°C (67°F) | 67 mm (2.6 inches) | 79% | very high |
| July Weather | 21°C (71°F) | 48 mm (1.9 inches) | 71% | very high |
| August Weather | 21°C (70°F) | 40 mm (1.6 inches) | 68% | very high |
| September Weather | 17°C (64°F) | 52 mm (2.1 inches) | 76% | high |
| October Weather | 13°C (56°F) | 80 mm (3.1 inches) | 87% | moderate |
| November Weather | 8°C (46°F) | 66 mm (2.6 inches) | 91% | low |
| December Weather | 6°C (44°F) | 102 mm (4.0 inches) | 93% | low |