Last updated: August 27, 2025
In September, the average temperature in San Ildefonso, Spain is a pleasant 17°C (63°F), with daytime highs reaching up to 32°C (89°F) and cooler nights dropping to a minimum of 3°C (39°F). Expect light rain, with an average precipitation of 44 mm (1.7 in) over 8 days. The atmosphere remains comfortably humid, averaging around 65% humidity, perfect for exploring the vibrant surroundings!
In September in San Ildefonso, the average temperature is 17°C (63°F). The maximum can reach 32°C (89°F), while the minimum can be as low as 3°C (39°F). It's advisable to pack a variety of clothing for your trip to San Ildefonso during this month to accommodate the changing temperatures.
In San Ildefonso in September, the total precipitation amount is 44 mm (1.7 in) over a duration of 8 days.
In San Ildefonso in September humidity is 65%. With an average temperature of 17°C (63°F), this humidity feels like a warm blanket enveloping you, making it a comfortable yet slightly muggy experience for traveling, where you might find yourself seeking shade or a refreshing drink to stay cool and refreshed.
In San Ildefonso in September, the maximum UV index is 8, which corresponds to a very high Exposure Category. This means that the time to burn is only 15 minutes. For more detailed information, you can refer to the Hourly UV Index in San Ildefonso.
UV Risk Categories
Weather in San Ildefonso varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in San Ildefonso, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | 3°C (37°F) | 55 mm (2.2 inches) | 90% | moderate |
| February Weather | 5°C (42°F) | 55 mm (2.2 inches) | 86% | moderate |
| March Weather | 7°C (44°F) | 73 mm (2.9 inches) | 79% | high |
| April Weather | 9°C (49°F) | 113 mm (4.4 inches) | 74% | very high |
| May Weather | 14°C (57°F) | 67 mm (2.6 inches) | 71% | very high |
| June Weather | 18°C (65°F) | 59 mm (2.3 inches) | 63% | extreme |
| July Weather | 22°C (71°F) | 23 mm (0.9 inches) | 59% | extreme |
| August Weather | 22°C (72°F) | 25 mm (1.0 inches) | 58% | very high |
| September Weather | 17°C (63°F) | 44 mm (1.7 inches) | 65% | very high |
| October Weather | 12°C (55°F) | 63 mm (2.5 inches) | 77% | high |
| November Weather | 6°C (44°F) | 88 mm (3.4 inches) | 87% | moderate |
| December Weather | 5°C (41°F) | 84 mm (3.3 inches) | 90% | low |