September Weather in Sparta, United States

Last updated: June 24, 2025

In September, the average temperature in Sparta, United States is a pleasant 25°C (78°F). However, be prepared for a range, as temperatures can dip to a cool 12°C (53°F) or soar up to a sizzling 37°C (99°F). During this month, expect about 98 mm (3.9 in) of rainfall distributed over 8 days, contributing to an average humidity of 82%. 🌦️

September Temperature in Sparta

In September in Sparta, the average temperature is 25°C (78°F). Maximum temperatures can reach 37°C (99°F), while the minimum can drop as low as 12°C (53°F). It's a perfect time for travelers to enjoy warm days and cooler evenings, so be sure to pack accordingly!

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 25°C (78°F), with highs reaching up to 37°C (99°F) and lows dropping to around 12°C (53°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 total precipitation amount is 98 mm (3.9 in), occurring over 8 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 98 mm (3.9 inches) of precipitation spread over approximately 8 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 Sparta

In Sparta in September, humidity is 82%. With an average temperature of 25°C (78°F), this humidity feels like a warm, heavy blanket wrapping around you, making outdoor activities a bit more challenging and encouraging you to seek shade or a cool spot during your travels.

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 82%, 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 9, which corresponds to a very high Exposure Category. The time to burn is just 15 minutes, so it's essential to take precautions. For 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 9, which falls under the very 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	9°C (49°F)	98 mm (3.9 inches)	86%	moderate
February Weather	12°C (54°F)	121 mm (4.8 inches)	84%	high
March Weather	15°C (59°F)	76 mm (3.0 inches)	83%	very high
April Weather	18°C (65°F)	96 mm (3.8 inches)	81%	very high
May Weather	23°C (74°F)	94 mm (3.7 inches)	81%	extreme
June Weather	26°C (79°F)	116 mm (4.6 inches)	81%	extreme
July Weather	27°C (82°F)	105 mm (4.1 inches)	83%	extreme
August Weather	27°C (81°F)	114 mm (4.5 inches)	81%	very high
September Weather	25°C (78°F)	98 mm (3.9 inches)	82%	very high
October Weather	20°C (69°F)	100 mm (3.9 inches)	78%	very high
November Weather	13°C (55°F)	81 mm (3.2 inches)	86%	high
December Weather	10°C (51°F)	123 mm (4.8 inches)	89%	moderate