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September Weather in Rhinelander, United States

Last updated: June 24, 2025

In September, the average temperature in Rhinelander, United States hovers around 15°C (59°F). However, temperatures can vary significantly, with minimums as low as 0°C (33°F) and maximums reaching up to 31°C (87°F). Expect a fair bit of rain, with precipitation averaging 96 mm (3.8 in) over the course of 11 days, and enjoy moderately high average humidity at 78%.

September Temperature in Rhinelander

In September, in Rhinelander, the average temperature is 15°C (59°F). Maximum temperatures can reach 31°C (87°F), while minimums can drop as low as 0°C (33°F). Be sure to pack for varying weather conditions if you're planning to travel during this time!

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

The chart illustrates September temperature patterns in Rhinelander, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Rhinelander, September typically has an average temperature of 15°C (59°F), with highs reaching up to 31°C (87°F) and lows dropping to around 0°C (33°F).
JanFebMarAprMayJunJulAugSepOctNovDec151528385465696659453021
Data source: Temperature data for Rhinelander 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 Rhinelander

In Rhinelander in September, the precipitation amount is 96 mm (3.8 in) spread over 11 days, resulting in a significant accumulation of rainfall.

September Precipitation Trends in Rhinelander

The chart displays monthly precipitation patterns in Rhinelander, 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 Rhinelander, September typically receives around 96 mm (3.8 inches) of precipitation spread over approximately 11 days.
JanFebMarAprMayJunJulAugSepOctNovDec3351489290106107115961175059
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Rhinelander

In Rhinelander in September, humidity is 78%. With an average temperature of 15°C (59°F), this humidity feels like a warm, enveloping blanket that clings to your skin, making outdoor activities a bit more tiring and requiring frequent breaks for hydration as you explore the area.

September Average Humidity in Rhinelander

This chart illustrates the average monthly humidity levels in Rhinelander, 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 Rhinelander is approximately 78%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec89%90%87%84%77%75%75%73%78%84%89%87%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Rhinelander

In Rhinelander 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 Rhinelander.

Maximum UV Index Levels in Rhinelander for September

The chart shows the monthly maximum UV Index (UVI) for Rhinelander 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 Rhinelander typically reaches 7, which falls under the high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec2457810997532
Data source: Rhinelander 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 Rhinelander Compares to Other Months

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

This table compares monthly weather conditions in Rhinelander, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-9°C (15°F)33 mm (1.3 inches)89%low
February Weather-10°C (15°F)51 mm (2.0 inches)90%moderate
March Weather-2°C (28°F)48 mm (1.9 inches)87%moderate
April Weather3°C (39°F)92 mm (3.6 inches)84%high
May Weather12°C (55°F)90 mm (3.5 inches)77%very high
June Weather18°C (65°F)106 mm (4.2 inches)75%very high
July Weather21°C (70°F)107 mm (4.2 inches)74%very high
August Weather19°C (66°F)114 mm (4.5 inches)73%very high
September Weather15°C (59°F)96 mm (3.8 inches)78%high
October Weather7°C (45°F)117 mm (4.6 inches)84%moderate
November Weather-1°C (30°F)50 mm (2.0 inches)89%moderate
December Weather-6°C (21°F)59 mm (2.3 inches)87%low

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