September Weather in Hills, United States

Last updated: June 24, 2025

In September, the average temperature in Hills, United States hovers around 18°C (65°F). However, be prepared for a range of conditions, with minimums dipping to 3°C (38°F) and highs reaching up to 32°C (91°F). Rainfall can be expected, with an average precipitation of 105 mm (4.1 in) spread over 8 days. Don't forget to account for the average humidity level of 75%, which can make the air feel warmer!

September Temperature in Hills

In September in Hills, the average temperature is 18°C (65°F). Maximums can reach 32°C (91°F) and minimums can be as low as 3°C (38°F). It's a great time for travelers to enjoy a mix of warm days and cooler nights, making it ideal for outdoor activities and sightseeing.

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

The chart illustrates September temperature patterns in Hills, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Hills, September typically has an average temperature of 18°C (65°F), with highs reaching up to 32°C (91°F) and lows dropping to around 3°C (38°F).

Data source: Temperature data for Hills generated using information from the Copernicus Climate Change Service.

September Precipitation in Hills

In Hills in September, the precipitation amount is 105 mm (4.1 in) over the course of 8 days.

September Precipitation Trends in Hills

The chart displays monthly precipitation patterns in Hills, 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 Hills, September typically receives around 105 mm (4.1 inches) of precipitation spread over approximately 8 days.

Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.

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Millimeters (mm) Inches (in)

September Humidity in Hills

In Hills in September, humidity is 75%. With an average temperature of 18°C (65°F), this humidity feels like a warm, enveloping blanket that can make outdoor exploration feel a bit stifling, potentially leading to discomfort during travel activities.

September Average Humidity in Hills

This chart illustrates the average monthly humidity levels in Hills, 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 Hills is approximately 75%, offering insight into how humid the weather typically is during this month.

Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Hills

In Hills 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 Hills.

Maximum UV Index Levels in Hills for September

The chart shows the monthly maximum UV Index (UVI) for Hills 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 Hills typically reaches 8, which falls under the very high exposure category.

Data source: Hills 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 Hills Compares to Other Months

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

This table compares monthly weather conditions in Hills, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	-7°C (20°F)	24 mm (0.9 inches)	80%	low
February Weather	-7°C (20°F)	27 mm (1.1 inches)	84%	moderate
March Weather	1°C (35°F)	65 mm (2.5 inches)	75%	moderate
April Weather	7°C (45°F)	83 mm (3.3 inches)	79%	very high
May Weather	15°C (59°F)	124 mm (4.9 inches)	74%	very high
June Weather	22°C (73°F)	98 mm (3.9 inches)	81%	extreme
July Weather	24°C (75°F)	80 mm (3.1 inches)	82%	very high
August Weather	22°C (71°F)	97 mm (3.8 inches)	80%	very high
September Weather	18°C (65°F)	105 mm (4.1 inches)	75%	very high
October Weather	9°C (48°F)	85 mm (3.3 inches)	77%	moderate
November Weather	1°C (35°F)	26 mm (1.0 inches)	85%	moderate
December Weather	-3°C (26°F)	38 mm (1.5 inches)	83%	moderate