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September Weather in Byron, United States

Last updated: June 24, 2025

In Byron, United States, the average temperature in September hovers around 19°C (67°F), with a comfortable range that can dip to a cool 2°C (36°F) and peak at a warm 34°C (93°F). Visitors can expect 119 mm (4.7 in) of precipitation over 10 days, contributing to an average humidity level of 79%. Perfect for those who enjoy a mix of mild temperatures and occasional rain!

September Temperature in Byron

In September in Byron, the average temperature is 19°C (67°F). Maximums can reach 34°C (93°F), while minimums can be as low as 2°C (36°F). Pack accordingly to enjoy a range of outdoor activities in this diverse climate!

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 19°C (67°F), with highs reaching up to 34°C (93°F) and lows dropping to around 2°C (36°F).
JanFebMarAprMayJunJulAugSepOctNovDec232538486172757267533731
Data source: Temperature data for Byron generated using information from the Copernicus Climate Change Service.
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The average of daily temperatures (24 hours) calculated across all days in the month.

September Precipitation in Byron

In Byron in September, the total precipitation amount is 119 mm (4.7 in) over the span of 10 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 119 mm (4.7 inches) of precipitation spread over approximately 10 days.
JanFebMarAprMayJunJulAugSepOctNovDec60547110315011873821191124750
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Byron

In Byron in September, humidity is 79%. With an average temperature of 19°C (67°F), this humidity feels like a warm, enveloping blanket that makes traveling a bit more challenging, as the air is thick and can leave you feeling sluggish during outdoor adventures.

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 79%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec85%85%85%85%78%80%78%76%79%83%88%82%
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.
JanFebMarAprMayJunJulAugSepOctNovDec34689101098532
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.
 TemperaturePrecipitationHumidityUV
January Weather-5°C (23°F)60 mm (2.4 inches)85%moderate
February Weather-4°C (25°F)54 mm (2.1 inches)85%moderate
March Weather3°C (39°F)71 mm (2.8 inches)85%high
April Weather9°C (48°F)103 mm (4.1 inches)85%very high
May Weather16°C (61°F)150 mm (5.9 inches)78%very high
June Weather22°C (72°F)118 mm (4.6 inches)80%very high
July Weather24°C (76°F)73 mm (2.9 inches)78%very high
August Weather22°C (73°F)82 mm (3.2 inches)76%very high
September Weather19°C (67°F)119 mm (4.7 inches)79%very high
October Weather12°C (53°F)112 mm (4.4 inches)83%moderate
November Weather3°C (38°F)47 mm (1.9 inches)88%moderate
December Weather0°C (31°F)50 mm (2.0 inches)81%low

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