September Weather in Redding, United States

Last updated: June 24, 2025

In September, the average temperature in Redding, United States hovers around 24°C (75°F). Expect a minimum of 7°C (44°F) and a soaring maximum of 43°C (109°F). With an average humidity of 62%, you can anticipate some moisture in the air. Rainfall is minimal, with just 9 mm (0.3 in) expected over the course of 1 day.

September Temperature in Redding

In September in Redding, the average temperature is 24°C (75°F), with maximums soaring to 43°C (109°F) and minimums dropping to 7°C (44°F). This diverse temperature range makes Redding an ideal destination for travelers seeking both warm days and cooler evenings.

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

The chart illustrates September temperature patterns in Redding, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Redding, September typically has an average temperature of 24°C (75°F), with highs reaching up to 43°C (109°F) and lows dropping to around 7°C (44°F).

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

September Precipitation in Redding

In Redding in September, the precipitation amount is 9 mm (0.3 in) over the course of 1 day.

September Precipitation Trends in Redding

The chart displays monthly precipitation patterns in Redding, 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 Redding, September typically receives around 9 mm (0.3 inches) of precipitation spread over approximately 1 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 Redding

In Redding in September, humidity is 62%. With an average temperature of 24°C (75°F), this humidity feels like a warm embrace, making for a sticky yet comfortable travel experience that invites you to explore but may require occasional breaks to rehydrate and cool down.

September Average Humidity in Redding

This chart illustrates the average monthly humidity levels in Redding, 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 Redding is approximately 62%, 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 Redding

In Redding 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 Redding.

Maximum UV Index Levels in Redding for September

The chart shows the monthly maximum UV Index (UVI) for Redding 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 Redding typically reaches 9, which falls under the very high exposure category.

Data source: Redding 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 Redding Compares to Other Months

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

This table compares monthly weather conditions in Redding, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	8°C (47°F)	213 mm (8.4 inches)	86%	moderate
February Weather	9°C (49°F)	192 mm (7.5 inches)	85%	moderate
March Weather	11°C (52°F)	187 mm (7.4 inches)	85%	high
April Weather	15°C (59°F)	92 mm (3.6 inches)	82%	very high
May Weather	20°C (68°F)	59 mm (2.3 inches)	81%	very high
June Weather	25°C (78°F)	8 mm (0.3 inches)	79%	extreme
July Weather	30°C (86°F)	1 mm (0.0 inches)	70%	very high
August Weather	28°C (83°F)	2 mm (0.1 inches)	60%	very high
September Weather	24°C (75°F)	9 mm (0.3 inches)	62%	very high
October Weather	17°C (64°F)	66 mm (2.6 inches)	72%	high
November Weather	12°C (54°F)	123 mm (4.8 inches)	87%	moderate
December Weather	8°C (46°F)	149 mm (5.9 inches)	86%	low