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September Weather in Hillside Lake, United States

Last updated: June 24, 2025

In September, the average temperature in Hillside Lake, United States hovers around 19°C (66°F), with highs reaching up to 32°C (90°F) and lows dipping to a cool 4°C (39°F). Expect about 121 mm (4.8 in) of precipitation spread across 9 days, contributing to an average humidity level of 68%.

September Temperature in Hillside Lake

In September in Hillside Lake, the average temperature is 19°C (66°F). Maximum temperatures can reach 32°C (90°F), while minimums can drop to as low as 4°C (39°F). This varied climate makes Hillside Lake an ideal destination for travelers looking to experience a range of weather conditions.

September Weather in Hillside Lake: Daily Temperature Highs, Lows, and Averages

The chart illustrates September temperature patterns in Hillside Lake, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Hillside Lake, September typically has an average temperature of 19°C (66°F), with highs reaching up to 32°C (90°F) and lows dropping to around 4°C (39°F).
JanFebMarAprMayJunJulAugSepOctNovDec303338495969747366564234
Data source: Temperature data for Hillside Lake 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 Hillside Lake

In Hillside Lake in September, the precipitation amount is 121 mm (4.8 in) over the course of 9 days.

September Precipitation Trends in Hillside Lake

The chart displays monthly precipitation patterns in Hillside Lake, 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 Hillside Lake, September typically receives around 121 mm (4.8 inches) of precipitation spread over approximately 9 days.
JanFebMarAprMayJunJulAugSepOctNovDec6894871141159613111812213890104
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Hillside Lake

In Hillside Lake in September humidity is 68%. With an average temperature of 19°C (66°F), this humidity feels like a warm embrace, creating a sticky atmosphere that can be a bit uncomfortable for traveling.

September Average Humidity in Hillside Lake

This chart illustrates the average monthly humidity levels in Hillside Lake, 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 Hillside Lake is approximately 68%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec84%82%81%78%70%69%62%65%68%74%82%80%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Hillside Lake

In Hillside Lake 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 Hillside Lake.

Maximum UV Index Levels in Hillside Lake for September

The chart shows the monthly maximum UV Index (UVI) for Hillside Lake 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 Hillside Lake typically reaches 8, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec356810101098642
Data source: Hillside Lake 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 Hillside Lake Compares to Other Months

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

This table compares monthly weather conditions in Hillside Lake, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-1°C (30°F)68 mm (2.7 inches)84%moderate
February Weather0°C (33°F)94 mm (3.7 inches)82%moderate
March Weather4°C (39°F)87 mm (3.4 inches)81%high
April Weather9°C (49°F)114 mm (4.5 inches)78%very high
May Weather15°C (60°F)115 mm (4.5 inches)69%very high
June Weather20°C (69°F)96 mm (3.8 inches)69%very high
July Weather24°C (75°F)131 mm (5.1 inches)62%very high
August Weather23°C (73°F)118 mm (4.7 inches)65%very high
September Weather19°C (66°F)121 mm (4.8 inches)68%very high
October Weather13°C (56°F)138 mm (5.4 inches)74%high
November Weather6°C (42°F)90 mm (3.5 inches)82%moderate
December Weather1°C (34°F)103 mm (4.1 inches)80%low

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