September Weather in Adel, United States

Last updated: June 24, 2025

In September, the average temperature in Adel, United States is a pleasant 20°C (69°F). However, temperatures can swing from a cool 5°C (41°F) to a warm 34°C (94°F). Expect around 105 mm (4.1 in) of precipitation spread over 9 days, with an average humidity of 73%. Whether you prefer sunny strolls or cozy indoor activities, this month offers a bit of everything!

September Temperature in Adel

In September in Adel, the average temperature is 20°C (69°F). Maximums can reach 34°C (94°F), while minimums can drop as low as 5°C (41°F). This makes Adel a suitable destination for travelers looking to experience mild weather with the possibility of warmer days.

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

The chart illustrates September temperature patterns in Adel, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Adel, September typically has an average temperature of 20°C (69°F), with highs reaching up to 34°C (94°F) and lows dropping to around 5°C (41°F).

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

September Precipitation in Adel

In Adel in September, the total precipitation amount reaches 105 mm (4.1 in) over the course of 9 days.

September Precipitation Trends in Adel

The chart displays monthly precipitation patterns in Adel, 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 Adel, September typically receives around 105 mm (4.1 inches) of precipitation spread over approximately 9 days.

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

Choose your preferred precipitation unit

Millimeters (mm) Inches (in)

September Humidity in Adel

In Adel in September humidity is 73%. With an average temperature of 20°C (69°F), this humidity feels like a warm embrace, making travel slightly sticky but ultimately comfortable as long as you stay hydrated and take breaks in the shade.

September Average Humidity in Adel

This chart illustrates the average monthly humidity levels in Adel, 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 Adel is approximately 73%, 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 Adel

In Adel 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 Adel.

Maximum UV Index Levels in Adel for September

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

Data source: Adel 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 Adel Compares to Other Months

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

This table compares monthly weather conditions in Adel, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	-5°C (23°F)	37 mm (1.5 inches)	78%	moderate
February Weather	-4°C (25°F)	39 mm (1.5 inches)	80%	moderate
March Weather	4°C (40°F)	83 mm (3.3 inches)	77%	high
April Weather	10°C (50°F)	71 mm (2.8 inches)	77%	very high
May Weather	17°C (63°F)	174 mm (6.8 inches)	77%	very high
June Weather	24°C (75°F)	118 mm (4.7 inches)	81%	extreme
July Weather	25°C (78°F)	66 mm (2.6 inches)	81%	very high
August Weather	23°C (74°F)	87 mm (3.4 inches)	77%	very high
September Weather	20°C (69°F)	105 mm (4.1 inches)	73%	very high
October Weather	11°C (53°F)	120 mm (4.7 inches)	75%	high
November Weather	4°C (39°F)	36 mm (1.4 inches)	85%	moderate
December Weather	-1°C (31°F)	38 mm (1.5 inches)	83%	moderate