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September Weather in Zilwaukee, United States

Last updated: June 24, 2025

In Zilwaukee, United States, the average temperature in September hovers around 18°C (64°F). However, be prepared for variations, as the temperature can dip to a chilly 1°C (34°F) or rise to a warm 34°C (94°F). Expect about 96 mm (3.8 in) of precipitation spread over approximately 10 days, with an average humidity level of 80%. 🌦️

September Temperature in Zilwaukee

In September in Zilwaukee, the average temperature is 18°C (64°F). The maximum can reach 34°C (94°F), while the minimum can drop to as low as 1°C (34°F). This range of temperatures makes Zilwaukee a versatile destination for travelers, offering both warm and cool experiences to enjoy.

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

The chart illustrates September temperature patterns in Zilwaukee, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Zilwaukee, September typically has an average temperature of 18°C (64°F), with highs reaching up to 34°C (94°F) and lows dropping to around 1°C (34°F).
JanFebMarAprMayJunJulAugSepOctNovDec252635455969747164523831
Data source: Temperature data for Zilwaukee 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 Zilwaukee

In Zilwaukee in September, the total precipitation amount is 96 mm (3.8 in) over a span of 10 days.

September Precipitation Trends in Zilwaukee

The chart displays monthly precipitation patterns in Zilwaukee, 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 Zilwaukee, September typically receives around 96 mm (3.8 inches) of precipitation spread over approximately 10 days.
JanFebMarAprMayJunJulAugSepOctNovDec575961881141157291961136160
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Zilwaukee

In Zilwaukee in September humidity is 80%. With an average temperature of 18°C (64°F), this humidity feels like a warm, damp blanket wrapping around you, making travel a bit more exhausting as the air thickens and the heat clings to your skin.

September Average Humidity in Zilwaukee

This chart illustrates the average monthly humidity levels in Zilwaukee, 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 Zilwaukee is approximately 80%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec88%87%85%86%80%80%80%81%80%84%90%86%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Zilwaukee

In Zilwaukee 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 Zilwaukee.

Maximum UV Index Levels in Zilwaukee for September

The chart shows the monthly maximum UV Index (UVI) for Zilwaukee 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 Zilwaukee typically reaches 7, which falls under the high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec2458910997532
Data source: Zilwaukee 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 Zilwaukee Compares to Other Months

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

This table compares monthly weather conditions in Zilwaukee, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-4°C (25°F)57 mm (2.2 inches)88%low
February Weather-4°C (26°F)59 mm (2.3 inches)87%moderate
March Weather2°C (35°F)61 mm (2.4 inches)85%moderate
April Weather7°C (46°F)88 mm (3.5 inches)86%very high
May Weather15°C (59°F)114 mm (4.5 inches)80%very high
June Weather20°C (69°F)115 mm (4.5 inches)80%very high
July Weather23°C (74°F)72 mm (2.8 inches)80%very high
August Weather22°C (72°F)91 mm (3.6 inches)80%very high
September Weather18°C (64°F)96 mm (3.8 inches)80%high
October Weather11°C (53°F)113 mm (4.4 inches)84%moderate
November Weather3°C (38°F)61 mm (2.4 inches)89%moderate
December Weather-1°C (31°F)60 mm (2.4 inches)86%low

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