September Weather in Red Oak, United States

Last updated: June 24, 2025

In September, the average temperature in Red Oak, United States is a pleasant 21°C (70°F), making it an ideal time for outdoor activities. However, be prepared for variations, as temperatures can dip to a minimum of 5°C (41°F) and soar to a maximum of 35°C (96°F). Expect some rain, with an average precipitation of 108 mm (4.3 in) spread over 9 days, and keep in mind the humidity is relatively high at 75%, contributing to a warm, tropical feel.

September Temperature in Red Oak

In September in Red Oak, the average temperature is 21°C (70°F). Maximums can reach 35°C (96°F), while minimums can drop to as low as 5°C (41°F). This diverse range of temperatures makes it a great time to explore outdoor activities while being prepared for varying weather conditions.

September Weather in Red Oak: Daily Temperature Highs, Lows, and Averages

The chart illustrates September temperature patterns in Red Oak, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Red Oak, September typically has an average temperature of 21°C (70°F), with highs reaching up to 35°C (96°F) and lows dropping to around 5°C (41°F).

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

September Precipitation in Red Oak

In Red Oak in September, the precipitation amount is 108 mm (4.3 in) spread over 9 days.

September Precipitation Trends in Red Oak

The chart displays monthly precipitation patterns in Red Oak, 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 Red Oak, September typically receives around 108 mm (4.3 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 Red Oak

In Red Oak in September, humidity is 75%. With an average temperature of 21°C (70°F), this humidity feels like a warm, enveloping blanket that makes exploring the area feel slightly sticky, requiring travelers to stay hydrated and take occasional breaks in the shade to fully enjoy their adventures.

September Average Humidity in Red Oak

This chart illustrates the average monthly humidity levels in Red Oak, 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 Red Oak 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 Red Oak

In Red Oak 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 Red Oak.

Maximum UV Index Levels in Red Oak for September

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

Data source: Red Oak 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 Red Oak Compares to Other Months

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

This table compares monthly weather conditions in Red Oak, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	-4°C (25°F)	34 mm (1.3 inches)	76%	moderate
February Weather	-3°C (26°F)	34 mm (1.3 inches)	80%	moderate
March Weather	5°C (42°F)	90 mm (3.5 inches)	73%	high
April Weather	10°C (51°F)	64 mm (2.5 inches)	74%	very high
May Weather	17°C (64°F)	161 mm (6.3 inches)	78%	very high
June Weather	24°C (76°F)	117 mm (4.6 inches)	82%	very high
July Weather	25°C (78°F)	75 mm (2.9 inches)	83%	very high
August Weather	24°C (75°F)	101 mm (4.0 inches)	80%	very high
September Weather	21°C (70°F)	108 mm (4.3 inches)	75%	very high
October Weather	12°C (53°F)	144 mm (5.7 inches)	75%	high
November Weather	4°C (40°F)	32 mm (1.3 inches)	82%	moderate
December Weather	0°C (32°F)	36 mm (1.4 inches)	83%	low