September Weather in Old Jefferson, United States

Last updated: June 24, 2025

In Old Jefferson, United States, the average temperature in September is a warm 26°C (79°F). Visitors can expect a minimum of 12°C (54°F) and a peak of 36°C (97°F) throughout the month. The region experiences about 140 mm (5.5 in) of precipitation over 13 days, contributing to an average humidity level of 79%.

September Temperature in Old Jefferson

In September in Old Jefferson, the average temperature is 26°C (79°F), with maximums reaching 36°C (97°F) and minimums dipping as low as 12°C (54°F). This makes it an ideal time for travelers to enjoy a mix of warm days and cooler evenings.

September Weather in Old Jefferson: Daily Temperature Highs, Lows, and Averages

The chart illustrates September temperature patterns in Old Jefferson, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Old Jefferson, September typically has an average temperature of 26°C (79°F), with highs reaching up to 36°C (97°F) and lows dropping to around 12°C (54°F).

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

September Precipitation in Old Jefferson

In Old Jefferson in September, the total precipitation amount is 140 mm (5.5 in) over the course of 13 days.

September Precipitation Trends in Old Jefferson

The chart displays monthly precipitation patterns in Old Jefferson, 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 Old Jefferson, September typically receives around 140 mm (5.5 inches) of precipitation spread over approximately 13 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 Old Jefferson

In Old Jefferson in September humidity is 79%. With an average temperature of 26°C (79°F), this humidity feels like a warm, sticky embrace that can make outdoor activities feel exhausting. Travelers should be prepared for a heavy air that clings to the skin, making hydration essential while navigating the sights and sounds of the city.

September Average Humidity in Old Jefferson

This chart illustrates the average monthly humidity levels in Old Jefferson, 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 Old Jefferson is approximately 79%, 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 Old Jefferson

In Old Jefferson in September, the maximum UV index reaches 10, which corresponds to a very high Exposure Category. With a time to burn of just 15 minutes, it's crucial to take precautions. For more detailed information, you can check the Hourly UV Index in Old Jefferson.

Maximum UV Index Levels in Old Jefferson for September

The chart shows the monthly maximum UV Index (UVI) for Old Jefferson 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 Old Jefferson typically reaches 10, which falls under the very high exposure category.

Data source: Old Jefferson 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 Old Jefferson Compares to Other Months

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

This table compares monthly weather conditions in Old Jefferson, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	11°C (53°F)	112 mm (4.4 inches)	83%	moderate
February Weather	14°C (58°F)	119 mm (4.7 inches)	83%	very high
March Weather	18°C (64°F)	84 mm (3.3 inches)	80%	very high
April Weather	20°C (68°F)	150 mm (5.9 inches)	81%	extreme
May Weather	24°C (76°F)	146 mm (5.8 inches)	81%	extreme
June Weather	27°C (80°F)	181 mm (7.1 inches)	78%	extreme
July Weather	28°C (82°F)	198 mm (7.8 inches)	79%	extreme
August Weather	27°C (81°F)	180 mm (7.1 inches)	79%	extreme
September Weather	26°C (79°F)	140 mm (5.5 inches)	79%	very high
October Weather	22°C (72°F)	115 mm (4.5 inches)	77%	very high
November Weather	15°C (59°F)	81 mm (3.2 inches)	85%	high
December Weather	13°C (56°F)	123 mm (4.8 inches)	88%	moderate