September Weather in Fort Madison, United States

Last updated: June 24, 2025

In September, the average temperature in Fort Madison, United States is a pleasant 21°C (70°F), with a minimum of 7°C (45°F) and a maximum soaring up to 35°C (95°F). Expect around 100 mm (4.0 in) of precipitation spread over 8 days, along with an average humidity level of 78%. Perfect for those who enjoy a bit of variety in their weather!

September Temperature in Fort Madison

In September in Fort Madison, the average temperature is 21°C (70°F), with maximums reaching 35°C (95°F) and minimums dropping as low as 7°C (45°F). This diverse temperature range makes it important for travelers to pack accordingly to enjoy their stay comfortably.

September Weather in Fort Madison: Daily Temperature Highs, Lows, and Averages

The chart illustrates September temperature patterns in Fort Madison, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Fort Madison, September typically has an average temperature of 21°C (70°F), with highs reaching up to 35°C (95°F) and lows dropping to around 7°C (45°F).

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

September Precipitation in Fort Madison

In Fort Madison in September, the precipitation amount is 100 mm (4.0 in) distributed over a span of 8 days.

September Precipitation Trends in Fort Madison

The chart displays monthly precipitation patterns in Fort Madison, 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 Fort Madison, September typically receives around 100 mm (4.0 inches) of precipitation spread over approximately 8 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 Fort Madison

In Fort Madison in September, humidity is 78%. With an average temperature of 21°C (70°F), this humidity feels like a warm, enveloping blanket that can leave travelers feeling sticky and slightly fatigued, making it important to stay hydrated and take frequent breaks from outdoor activities.

September Average Humidity in Fort Madison

This chart illustrates the average monthly humidity levels in Fort Madison, 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 Fort Madison is approximately 78%, 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 Fort Madison

In Fort Madison 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 Fort Madison.

Maximum UV Index Levels in Fort Madison for September

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

Data source: Fort Madison 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 Fort Madison Compares to Other Months

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

This table compares monthly weather conditions in Fort Madison, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	-3°C (26°F)	56 mm (2.2 inches)	81%	moderate
February Weather	-2°C (29°F)	60 mm (2.3 inches)	81%	moderate
March Weather	5°C (42°F)	97 mm (3.8 inches)	81%	high
April Weather	10°C (51°F)	92 mm (3.6 inches)	82%	very high
May Weather	18°C (64°F)	168 mm (6.6 inches)	78%	very high
June Weather	24°C (75°F)	131 mm (5.1 inches)	81%	extreme
July Weather	26°C (78°F)	79 mm (3.1 inches)	79%	very high
August Weather	24°C (75°F)	75 mm (3.0 inches)	77%	very high
September Weather	21°C (70°F)	100 mm (4.0 inches)	78%	very high
October Weather	13°C (56°F)	123 mm (4.8 inches)	78%	high
November Weather	5°C (41°F)	51 mm (2.0 inches)	87%	moderate
December Weather	1°C (34°F)	45 mm (1.8 inches)	84%	low