September Weather in Byron, United States

Last updated: June 24, 2025

In September, the average temperature in Byron, United States hovers around 16°C (60°F), offering a mild climate. However, be prepared for temperature swings, as it can dip to a chilly -1°C (31°F) or soar up to a sweltering 35°C (96°F). Expect some rain as well, with a precipitation amount of 34 mm (1.4 in) over approximately 4 days. Additionally, the air can feel quite humid, with an average humidity level of 76%. Plan your visit accordingly!

September Temperature in Byron

In September in Byron, the average temperature is 16°C (60°F). The maximum can reach 35°C (96°F), while the minimum can be as low as -1°C (31°F). Therefore, travelers should be prepared for a wide range of temperatures and pack accordingly.

September Weather in Byron: Daily Temperature Highs, Lows, and Averages

The chart illustrates September temperature patterns in Byron, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Byron, September typically has an average temperature of 16°C (60°F), with highs reaching up to 35°C (96°F) and lows dropping to around -1°C (31°F).

Data source: Temperature data for Byron generated using information from the Copernicus Climate Change Service.

September Precipitation in Byron

In Byron in September, the total precipitation amount is 34 mm (1.4 in) spread over a period of 4 days.

September Precipitation Trends in Byron

The chart displays monthly precipitation patterns in Byron, with values for each month alongside September’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how September’s conditions compare to those of other months. In Byron, September typically receives around 34 mm (1.4 inches) of precipitation spread over approximately 4 days.

Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.

Choose your preferred precipitation unit

Millimeters (mm) Inches (in)

September Humidity in Byron

In Byron in September humidity is 76%. With an average temperature of 16°C (60°F), this humidity feels like a warm embrace, making it somewhat uncomfortable for traveling, as the air can feel heavy and oppressive, potentially leading to fatigue and a constant need for hydration.

September Average Humidity in Byron

This chart illustrates the average monthly humidity levels in Byron, with September’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In September, average humidity in Byron is approximately 76%, offering insight into how humid the weather typically is during this month.

Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Byron

In Byron 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 Byron.

Maximum UV Index Levels in Byron for September

The chart shows the monthly maximum UV Index (UVI) for Byron in September, representing the highest UV radiation level. The UVI measures the intensity of ultraviolet radiation from the sun, indicating the potential risk of sunburn and UV-related health issues. In September, the maximum UV index in Byron typically reaches 8, which falls under the very high exposure category.

Data source: Byron September UVI data generated using information from the Copernicus Climate Change Service.

UV Risk Categories

Extreme (11+): Avoid the sun, stay in shade.
Very High (8-10): Limit sun exposure.
High (6-7): Use SPF 30+ and protective clothing.
Moderate (3-5): Midday shade recommended.
Low (0-2): No protection needed.

How September Weather in Byron Compares to Other Months

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.

This table compares monthly weather conditions in Byron, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	-4°C (24°F)	11 mm (0.4 inches)	85%	moderate
February Weather	-7°C (20°F)	26 mm (1.0 inches)	85%	moderate
March Weather	3°C (37°F)	17 mm (0.7 inches)	79%	high
April Weather	6°C (43°F)	40 mm (1.6 inches)	74%	very high
May Weather	12°C (53°F)	53 mm (2.1 inches)	76%	very high
June Weather	18°C (65°F)	36 mm (1.4 inches)	79%	extreme
July Weather	23°C (74°F)	16 mm (0.6 inches)	81%	extreme
August Weather	21°C (70°F)	16 mm (0.6 inches)	80%	very high
September Weather	16°C (60°F)	34 mm (1.4 inches)	76%	very high
October Weather	6°C (43°F)	33 mm (1.3 inches)	74%	high
November Weather	1°C (34°F)	17 mm (0.7 inches)	81%	moderate
December Weather	-4°C (26°F)	16 mm (0.6 inches)	87%	low