September Weather in Swea City, United States

Last updated: June 24, 2025

In September, the average temperature in Swea City, United States is a pleasant 19°C (66°F), with minimum temperatures dropping to 3°C (37°F) and soaring to a comfortable 33°C (92°F). Expect some rain, as 106 mm (4.2 in) of precipitation falls over 9 days. Additionally, the average humidity sits at a noteworthy 75%, adding a touch of warmth to the air.

September Temperature in Swea City

In September in Swea City, the average temperature is 19°C (66°F). Maximums can reach 33°C (92°F) and minimums can be as low as 3°C (37°F). This diverse temperature range makes Swea City an ideal destination for travelers looking for a mix of warm and cool weather during their visit.

September Weather in Swea City: Daily Temperature Highs, Lows, and Averages

The chart illustrates September temperature patterns in Swea City, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Swea City, September typically has an average temperature of 19°C (66°F), with highs reaching up to 33°C (92°F) and lows dropping to around 3°C (37°F).

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

September Precipitation in Swea City

In Swea City in September, the total precipitation amount is 106 mm (4.2 in), spread over the course of 9 days.

September Precipitation Trends in Swea City

The chart displays monthly precipitation patterns in Swea City, 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 Swea City, September typically receives around 106 mm (4.2 inches) of precipitation spread over approximately 9 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 Swea City

In Swea City in September humidity is 75%. With an average temperature of 19°C (66°F), this humidity feels like a warm, enveloping blanket, making it slightly uncomfortable for traveling as you navigate through the thick, muggy air.

September Average Humidity in Swea City

This chart illustrates the average monthly humidity levels in Swea City, 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 Swea City 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 Swea City

In Swea City 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 Swea City.

Maximum UV Index Levels in Swea City for September

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

Data source: Swea City 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 Swea City Compares to Other Months

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

This table compares monthly weather conditions in Swea City, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	-8°C (18°F)	35 mm (1.4 inches)	82%	moderate
February Weather	-8°C (18°F)	43 mm (1.7 inches)	84%	moderate
March Weather	1°C (35°F)	73 mm (2.9 inches)	80%	moderate
April Weather	7°C (45°F)	91 mm (3.6 inches)	81%	very high
May Weather	16°C (60°F)	150 mm (5.9 inches)	74%	very high
June Weather	22°C (73°F)	120 mm (4.7 inches)	80%	very high
July Weather	24°C (75°F)	114 mm (4.5 inches)	80%	very high
August Weather	21°C (71°F)	113 mm (4.4 inches)	77%	very high
September Weather	19°C (66°F)	106 mm (4.2 inches)	75%	very high
October Weather	10°C (49°F)	94 mm (3.7 inches)	80%	moderate
November Weather	2°C (35°F)	35 mm (1.4 inches)	87%	moderate
December Weather	-3°C (27°F)	42 mm (1.7 inches)	83%	moderate