September Weather in Sparta, United States

Last updated: June 24, 2025

In September, the average temperature in Sparta, United States hovers around 18°C (64°F). Expect a minimum chill of 2°C (35°F) and a warm maximum of 34°C (93°F). This month also brings 103 mm (4.1 in) of precipitation over 10 days, with an average humidity level of 74%.

September Temperature in Sparta

In September in Sparta, the average temperature is 18°C (64°F), with maximums potentially reaching 34°C (93°F) and minimums dipping as low as 2°C (35°F). This diverse range of temperatures makes it essential for travelers to pack layers to ensure comfort in both warm and cool conditions.

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

The chart illustrates September temperature patterns in Sparta, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Sparta, September typically has an average temperature of 18°C (64°F), with highs reaching up to 34°C (93°F) and lows dropping to around 2°C (35°F).

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

September Precipitation in Sparta

In Sparta in September, the precipitation amount is 103 mm (4.1 in) over a span of 10 days.

September Precipitation Trends in Sparta

The chart displays monthly precipitation patterns in Sparta, 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 Sparta, September typically receives around 103 mm (4.1 inches) of precipitation spread over approximately 10 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 Sparta

In Sparta in September humidity is 74%. With an average temperature of 18°C (64°F), this humidity feels like a warm embrace, making it ideal for leisurely strolls but potentially uncomfortable for extended outdoor activities.

September Average Humidity in Sparta

This chart illustrates the average monthly humidity levels in Sparta, 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 Sparta is approximately 74%, 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 Sparta

In Sparta in September, the maximum UV index is 7, which corresponds to the high Exposure Category. This means that the time to burn is approximately 25 minutes. For more detailed information, you can check the Hourly UV Index in Sparta.

Maximum UV Index Levels in Sparta for September

The chart shows the monthly maximum UV Index (UVI) for Sparta 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 Sparta typically reaches 7, which falls under the high exposure category.

Data source: Sparta 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 Sparta Compares to Other Months

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

This table compares monthly weather conditions in Sparta, 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 (19°F)	36 mm (1.4 inches)	84%	low
February Weather	-6°C (21°F)	52 mm (2.0 inches)	85%	moderate
March Weather	2°C (35°F)	57 mm (2.2 inches)	84%	moderate
April Weather	7°C (45°F)	86 mm (3.4 inches)	83%	very high
May Weather	15°C (59°F)	135 mm (5.3 inches)	75%	very high
June Weather	21°C (70°F)	118 mm (4.6 inches)	79%	very high
July Weather	23°C (74°F)	103 mm (4.1 inches)	75%	very high
August Weather	21°C (70°F)	113 mm (4.5 inches)	69%	very high
September Weather	18°C (64°F)	103 mm (4.1 inches)	74%	high
October Weather	10°C (50°F)	111 mm (4.4 inches)	79%	moderate
November Weather	2°C (35°F)	50 mm (2.0 inches)	88%	moderate
December Weather	-3°C (27°F)	45 mm (1.8 inches)	82%	low