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September Weather in Bayfield, United States

Last updated: June 24, 2025

In Bayfield, United States, the average temperature in September is a mild 15°C (59°F). However, temperatures can vary significantly, with a minimum of -3°C (26°F) and a maximum soaring to 31°C (89°F). During this month, expect around 37 mm (1.4 in) of precipitation spread over 6 days, all while enjoying an average humidity level of 59%.

September Temperature in Bayfield

In September in Bayfield, the average temperature is 15°C (59°F). The maximum can reach 31°C (89°F), and the minimum can be as low as -3°C (26°F). This diverse temperature range makes Bayfield an intriguing destination for travelers seeking both warm and chilly experiences.

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

The chart illustrates September temperature patterns in Bayfield, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Bayfield, September typically has an average temperature of 15°C (59°F), with highs reaching up to 31°C (89°F) and lows dropping to around -3°C (26°F).
JanFebMarAprMayJunJulAugSepOctNovDec222633425263686559453523
Data source: Temperature data for Bayfield 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 Bayfield

In Bayfield in September, the precipitation amount is 37 mm (1.4 in) over a span of 6 days.

September Precipitation Trends in Bayfield

The chart displays monthly precipitation patterns in Bayfield, 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 Bayfield, September typically receives around 37 mm (1.4 inches) of precipitation spread over approximately 6 days.
JanFebMarAprMayJunJulAugSepOctNovDec577369244022362137483962
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Bayfield

In Bayfield in September humidity is 59%. With an average temperature of 15°C (59°F), this humidity feels like a cool, refreshing blanket, making it pleasant for exploring the sights while requiring a light jacket for comfort.

September Average Humidity in Bayfield

This chart illustrates the average monthly humidity levels in Bayfield, 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 Bayfield is approximately 59%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec85%86%76%69%53%40%36%44%59%74%83%86%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Bayfield

In Bayfield in September, the maximum UV index reaches 10, which corresponds to a very high Exposure Category. With a time to burn of just 15 minutes, it's crucial to take precautions. For more detailed information, you can check the Hourly UV Index in Bayfield.

Maximum UV Index Levels in Bayfield for September

The chart shows the monthly maximum UV Index (UVI) for Bayfield 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 Bayfield typically reaches 10, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec479111213131210864
Data source: Bayfield 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 Bayfield Compares to Other Months

Weather in Bayfield varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Bayfield, focusing on differences in temperature, rainfall, humidity, and UV levels.

This table compares monthly weather conditions in Bayfield, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-6°C (22°F)57 mm (2.3 inches)85%moderate
February Weather-4°C (26°F)73 mm (2.9 inches)86%high
March Weather0°C (33°F)69 mm (2.7 inches)76%very high
April Weather6°C (42°F)24 mm (1.0 inches)69%extreme
May Weather11°C (52°F)39 mm (1.6 inches)53%extreme
June Weather17°C (63°F)22 mm (0.9 inches)40%extreme
July Weather20°C (68°F)36 mm (1.4 inches)36%extreme
August Weather19°C (66°F)21 mm (0.8 inches)44%extreme
September Weather15°C (59°F)37 mm (1.4 inches)59%very high
October Weather7°C (45°F)48 mm (1.9 inches)74%very high
November Weather1°C (35°F)39 mm (1.5 inches)83%high
December Weather-5°C (23°F)62 mm (2.4 inches)85%moderate

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