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September Weather in Hillsdale, United States

Last updated: June 24, 2025

In Hillsdale, United States, the average temperature in September hovers around 19°C (66°F). Expect a minimum of 2°C (36°F) and an enticing maximum of 32°C (91°F). During this time, the area receives approximately 78 mm (3.1 in) of precipitation spread over 9 days, and the average humidity levels reach a comfortable 78%. Prepare for a month that's as varied as it is delightful!

September Temperature in Hillsdale

In September in Hillsdale, the average temperature is 19°C (66°F). Maximum temperatures can reach up to 32°C (91°F), while minimum temperatures can drop as low as 2°C (36°F). Be prepared for a wide range of temperatures and pack accordingly for your travels!

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

The chart illustrates September temperature patterns in Hillsdale, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Hillsdale, September typically has an average temperature of 19°C (66°F), with highs reaching up to 32°C (91°F) and lows dropping to around 2°C (36°F).
JanFebMarAprMayJunJulAugSepOctNovDec262737476070747165543932
Data source: Temperature data for Hillsdale 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 Hillsdale

In Hillsdale in September, the precipitation amount is 78 mm (3.1 in) over the course of 9 days.

September Precipitation Trends in Hillsdale

The chart displays monthly precipitation patterns in Hillsdale, 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 Hillsdale, September typically receives around 78 mm (3.1 inches) of precipitation spread over approximately 9 days.
JanFebMarAprMayJunJulAugSepOctNovDec7173899614210712477781218058
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Hillsdale

In Hillsdale in September, humidity is 78%. With an average temperature of 19°C (66°F), this humidity feels like a warm, enveloping blanket, making traveling quite uncomfortable unless you're well-prepared with lightweight, breathable clothing and frequent breaks to stay hydrated.

September Average Humidity in Hillsdale

This chart illustrates the average monthly humidity levels in Hillsdale, 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 Hillsdale is approximately 78%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec88%87%87%88%81%82%81%78%78%82%89%86%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Hillsdale

In Hillsdale 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 Hillsdale.

Maximum UV Index Levels in Hillsdale for September

The chart shows the monthly maximum UV Index (UVI) for Hillsdale 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 Hillsdale typically reaches 8, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec35699101098642
Data source: Hillsdale 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 Hillsdale Compares to Other Months

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

This table compares monthly weather conditions in Hillsdale, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-3°C (26°F)71 mm (2.8 inches)88%moderate
February Weather-3°C (28°F)73 mm (2.9 inches)87%moderate
March Weather3°C (38°F)89 mm (3.5 inches)87%high
April Weather8°C (47°F)96 mm (3.8 inches)87%very high
May Weather15°C (60°F)142 mm (5.6 inches)81%very high
June Weather21°C (70°F)107 mm (4.2 inches)82%very high
July Weather23°C (74°F)124 mm (4.9 inches)81%very high
August Weather22°C (71°F)77 mm (3.0 inches)78%very high
September Weather19°C (66°F)78 mm (3.1 inches)78%very high
October Weather12°C (54°F)121 mm (4.8 inches)82%high
November Weather4°C (39°F)80 mm (3.2 inches)89%moderate
December Weather0°C (33°F)58 mm (2.3 inches)86%low

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