September Weather in South Oroville, United States

Last updated: June 24, 2025

In South Oroville, United States, the average temperature in September is a pleasant 23°C (74°F). However, be prepared for a range, as temperatures can drop to a cool 7°C (44°F) or soar up to a sizzling 42°C (108°F). With a precipitation amount of just 10 mm (0.4 in) over the course of 1 day, you can expect mostly dry conditions. The average humidity hovers around 44%, ensuring a comfortable atmosphere for your adventures.

September Temperature in South Oroville

In September in South Oroville, the average temperature is 23°C (74°F). Maximum temperatures can reach 42°C (108°F), while the minimum can drop to as low as 7°C (44°F). This wide temperature range makes South Oroville a destination for travelers seeking both warm sunny days and cooler evenings.

September Weather in South Oroville: Daily Temperature Highs, Lows, and Averages

The chart illustrates September temperature patterns in South Oroville, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In South Oroville, September typically has an average temperature of 23°C (74°F), with highs reaching up to 42°C (108°F) and lows dropping to around 7°C (44°F).

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

September Precipitation in South Oroville

In South Oroville in September, the precipitation amount is 10 mm (0.4 in) over the course of 1 day.

September Precipitation Trends in South Oroville

The chart displays monthly precipitation patterns in South Oroville, 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 South Oroville, September typically receives around 10 mm (0.4 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 South Oroville

In South Oroville in September humidity is 44%. With an average temperature of 23°C (74°F), this humidity feels like a comfortable embrace, making it pleasant for traveling and exploring the sights without feeling overly hot or sticky.

September Average Humidity in South Oroville

This chart illustrates the average monthly humidity levels in South Oroville, 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 South Oroville is approximately 44%, 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 South Oroville

In South Oroville 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 South Oroville.

Maximum UV Index Levels in South Oroville for September

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

Data source: South Oroville 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 South Oroville Compares to Other Months

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

This table compares monthly weather conditions in South Oroville, 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 (48°F)	202 mm (7.9 inches)	84%	moderate
February Weather	10°C (50°F)	212 mm (8.4 inches)	84%	moderate
March Weather	12°C (53°F)	180 mm (7.1 inches)	83%	high
April Weather	16°C (60°F)	90 mm (3.6 inches)	81%	very high
May Weather	20°C (68°F)	48 mm (1.9 inches)	74%	very high
June Weather	25°C (78°F)	6 mm (0.2 inches)	64%	extreme
July Weather	28°C (83°F)	1 mm (0.0 inches)	44%	extreme
August Weather	27°C (80°F)	1 mm (0.0 inches)	36%	very high
September Weather	23°C (74°F)	10 mm (0.4 inches)	44%	very high
October Weather	18°C (64°F)	59 mm (2.3 inches)	65%	high
November Weather	12°C (54°F)	111 mm (4.4 inches)	84%	moderate
December Weather	9°C (48°F)	166 mm (6.5 inches)	83%	moderate