September Weather in Springfield, United States

Last updated: June 24, 2025

In Springfield, United States, the average temperature in September is a pleasant 20°C (68°F). However, you can experience a range with minimums dropping to 5°C (41°F) and maximums soaring to 35°C (95°F). Be prepared for some rain, as the area receives about 73 mm (2.9 in) of precipitation over 7 days, accompanied by an average humidity of 75%.

September Temperature in Springfield

In September in Springfield, the average temperature is 20°C (68°F). Maximum temperatures can reach 35°C (95°F), while minimum temperatures can drop as low as 5°C (41°F). This diverse temperature range makes it a great destination for travelers looking to experience both warm days and cooler evenings.

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

The chart illustrates September temperature patterns in Springfield, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Springfield, September typically has an average temperature of 20°C (68°F), with highs reaching up to 35°C (95°F) and lows dropping to around 5°C (41°F).

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

September Precipitation in Springfield

In Springfield in September, the precipitation amount is 73 mm (2.9 in) during a span of 7 days.

September Precipitation Trends in Springfield

The chart displays monthly precipitation patterns in Springfield, 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 Springfield, September typically receives around 73 mm (2.9 inches) of precipitation spread over approximately 7 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 Springfield

In Springfield in September, humidity is 75%. With an average temperature of 20°C (68°F), this humidity feels like a warm, muggy embrace that can leave travelers feeling sticky and exhausted.

September Average Humidity in Springfield

This chart illustrates the average monthly humidity levels in Springfield, 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 Springfield 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 Springfield

In Springfield 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 Springfield.

Maximum UV Index Levels in Springfield for September

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

Data source: Springfield 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 Springfield Compares to Other Months

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

This table compares monthly weather conditions in Springfield, 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)	22 mm (0.9 inches)	77%	moderate
February Weather	-5°C (23°F)	23 mm (0.9 inches)	81%	moderate
March Weather	3°C (38°F)	72 mm (2.8 inches)	71%	high
April Weather	8°C (47°F)	66 mm (2.6 inches)	75%	very high
May Weather	15°C (60°F)	147 mm (5.8 inches)	74%	very high
June Weather	24°C (75°F)	78 mm (3.1 inches)	82%	extreme
July Weather	25°C (78°F)	88 mm (3.5 inches)	84%	very high
August Weather	23°C (74°F)	92 mm (3.6 inches)	82%	very high
September Weather	20°C (68°F)	73 mm (2.9 inches)	75%	very high
October Weather	10°C (50°F)	76 mm (3.0 inches)	72%	moderate
November Weather	3°C (38°F)	22 mm (0.9 inches)	81%	moderate
December Weather	-2°C (28°F)	44 mm (1.7 inches)	79%	low