Last updated: June 24, 2025
In September, the average temperature in Byron, United States is a pleasant 18°C (65°F). However, temperatures can vary significantly, with minimums dipping to 1°C (34°F) and soaring up to a maximum of 34°C (94°F). Expect around 83 mm (3.3 in) of precipitation over approximately 10 days, contributing to an average humidity of 80%.
In September in Byron, the average temperature is 18°C (65°F), with maximums reaching up to 34°C (94°F) and minimums dipping as low as 1°C (34°F). Be prepared for a range of temperatures during your travels, bringing both lightweight clothing for the heat and warmer layers for the cooler moments.
In Byron in September, the total precipitation amount is 83 mm (3.3 in) over a span of 10 days.
In Byron in September, humidity is 80%. With an average temperature of 18°C (65°F), this humidity feels like wandering through a warm, damp blanket, making every step slightly heavy and resulting in a constant sheen of sweat, which can be both refreshing and exhausting for travelers.
In Byron 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 Byron.
UV Risk Categories
Weather in Byron varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Byron, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | -4°C (26°F) | 63 mm (2.5 inches) | 88% | low |
| February Weather | -3°C (27°F) | 66 mm (2.6 inches) | 87% | moderate |
| March Weather | 2°C (37°F) | 69 mm (2.7 inches) | 85% | moderate |
| April Weather | 8°C (47°F) | 91 mm (3.6 inches) | 86% | very high |
| May Weather | 15°C (60°F) | 111 mm (4.4 inches) | 80% | very high |
| June Weather | 21°C (70°F) | 103 mm (4.0 inches) | 80% | very high |
| July Weather | 23°C (74°F) | 88 mm (3.5 inches) | 80% | very high |
| August Weather | 22°C (72°F) | 75 mm (2.9 inches) | 80% | very high |
| September Weather | 18°C (65°F) | 83 mm (3.3 inches) | 80% | high |
| October Weather | 12°C (53°F) | 109 mm (4.3 inches) | 84% | moderate |
| November Weather | 3°C (39°F) | 67 mm (2.6 inches) | 89% | moderate |
| December Weather | 0°C (32°F) | 55 mm (2.1 inches) | 86% | low |