Last updated: June 24, 2025
In Lyons, United States, the average temperature for September hovers around 22°C (72°F), making it a pleasant time to visit. Expect temperatures to range from a chilly minimum of 7°C (45°F) to a warm maximum of 34°C (93°F). During this month, you can anticipate approximately 67 mm (2.7 in) of precipitation spread over 6 days, contributing to an average humidity of 69%. Enjoy the balance of warmth and refreshing breezes that this season brings!
In September in Lyons, the average temperature is 22°C (72°F). Maximum temperatures can reach 34°C (93°F), while minimum temperatures can drop as low as 7°C (45°F). This makes Lyons an ideal destination for travelers who enjoy mild weather with the opportunity for both warm days and cooler nights.
In Lyons in September, the precipitation amount is 67 mm (2.7 in) over the course of 6 days, indicating a moderate level of rainfall for the region during that time.
In Lyons in September, humidity is 69%. With an average temperature of 22°C (72°F), this humidity feels like a warm, enveloping blanket, making travel feel sticky and slightly oppressive, yet also invigorating as the air is thick with the scent of blooming flora and vibrant surroundings.
In Lyons 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 Lyons.
UV Risk Categories
Weather in Lyons varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Lyons, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | 0°C (33°F) | 94 mm (3.7 inches) | 87% | moderate |
| February Weather | 2°C (36°F) | 114 mm (4.5 inches) | 85% | moderate |
| March Weather | 7°C (46°F) | 135 mm (5.3 inches) | 86% | high |
| April Weather | 12°C (54°F) | 123 mm (4.8 inches) | 84% | very high |
| May Weather | 19°C (67°F) | 139 mm (5.5 inches) | 79% | very high |
| June Weather | 24°C (75°F) | 127 mm (5.0 inches) | 82% | extreme |
| July Weather | 26°C (78°F) | 106 mm (4.2 inches) | 79% | very high |
| August Weather | 24°C (76°F) | 101 mm (4.0 inches) | 70% | very high |
| September Weather | 22°C (72°F) | 67 mm (2.7 inches) | 69% | very high |
| October Weather | 15°C (60°F) | 99 mm (3.9 inches) | 76% | high |
| November Weather | 6°C (43°F) | 107 mm (4.2 inches) | 88% | moderate |
| December Weather | 4°C (39°F) | 104 mm (4.1 inches) | 87% | moderate |