Last updated: June 24, 2025
In September, the average temperature in La Salle, United States is a comfortable 20°C (69°F). However, temperatures can vary significantly, with a minimum of 4°C (39°F) and a maximum soaring to 35°C (95°F). Visitors should be prepared for some rain, as the area receives about 85 mm (3.3 in) of precipitation over 9 days. With an average humidity level of 80%, it's a great time to enjoy the blend of warmth and tropical vibes!
In September in La Salle, the average temperature is 20°C (69°F), with maximums reaching up to 35°C (95°F) and minimums dropping as low as 4°C (39°F). This climate makes La Salle an ideal destination for travelers seeking a pleasant mix of warmth and cooler evenings.
In La Salle in September, the precipitation amount is 85 mm (3.3 in) over the course of 9 days.
In La Salle in September, humidity is 80%. With an average temperature of 20°C (69°F), this humidity feels like a warm blanket enveloping you, making every step slightly more challenging as you navigate the air that clings to your skin, often leaving you longing for a cool breeze while exploring the sights.
In La Salle 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 La Salle.
UV Risk Categories
Weather in La Salle varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in La Salle, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | -4°C (26°F) | 60 mm (2.3 inches) | 82% | moderate |
| February Weather | -2°C (28°F) | 65 mm (2.5 inches) | 83% | moderate |
| March Weather | 5°C (41°F) | 93 mm (3.7 inches) | 84% | high |
| April Weather | 10°C (50°F) | 115 mm (4.5 inches) | 85% | very high |
| May Weather | 17°C (63°F) | 160 mm (6.3 inches) | 79% | very high |
| June Weather | 23°C (73°F) | 147 mm (5.8 inches) | 82% | extreme |
| July Weather | 24°C (76°F) | 104 mm (4.1 inches) | 80% | very high |
| August Weather | 23°C (74°F) | 78 mm (3.1 inches) | 81% | very high |
| September Weather | 20°C (69°F) | 85 mm (3.3 inches) | 80% | very high |
| October Weather | 13°C (55°F) | 132 mm (5.2 inches) | 82% | high |
| November Weather | 4°C (40°F) | 56 mm (2.2 inches) | 88% | moderate |
| December Weather | 1°C (34°F) | 53 mm (2.1 inches) | 84% | low |