October Weather in Riverside, United States

Last updated: June 24, 2025

In October, the average temperature in Riverside, United States hovers around 10°C (50°F). Expect notable variations, with a minimum dipping to -11°C (12°F) and a maximum soaring to 27°C (82°F). During this time, 41 mm (1.6 in) of precipitation is anticipated over approximately 5 days, while the average humidity sits at a comfortable 67%. Prepare accordingly for this diverse climate!

October Temperature in Riverside

In October in Riverside, the average temperature is 10°C (50°F). Maximums can reach 27°C (82°F), while minimums can drop as low as -11°C (12°F). Travelers should be prepared for a wide range of temperatures, so layering clothing is recommended.

October Weather in Riverside: Daily Temperature Highs, Lows, and Averages

The chart illustrates October temperature patterns in Riverside, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Riverside, October typically has an average temperature of 10°C (50°F), with highs reaching up to 27°C (82°F) and lows dropping to around -11°C (12°F).

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

October Precipitation in Riverside

In Riverside in October, the precipitation amount is 41 mm (1.6 in) over a period of 5 days.

October Precipitation Trends in Riverside

The chart displays monthly precipitation patterns in Riverside, with values for each month alongside October’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how October’s conditions compare to those of other months. In Riverside, October typically receives around 41 mm (1.6 inches) of precipitation spread over approximately 5 days.

Data source: Precipitation data for October generated using information from the Copernicus Climate Change Service.

Choose your preferred precipitation unit

Millimeters (mm) Inches (in)

October Humidity in Riverside

In Riverside in October humidity is 67%. With an average temperature of 10°C (50°F), this humidity feels like a damp chill, making it essential for travelers to layer their clothing and prepare for a rather brisk experience while exploring the surroundings.

October Average Humidity in Riverside

This chart illustrates the average monthly humidity levels in Riverside, with October’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In October, average humidity in Riverside is approximately 67%, offering insight into how humid the weather typically is during this month.

Data source: Humidity data for October generated using information from the Copernicus Climate Change Service.

October UV Index in Riverside

In Riverside in October, the maximum UV index is 6, which corresponds to a high Exposure Category. The time to burn is approximately 25 minutes. To find the hourly UV index in Riverside, you can refer to this Hourly UV Index in Riverside.

Maximum UV Index Levels in Riverside for October

The chart shows the monthly maximum UV Index (UVI) for Riverside in October, 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 October, the maximum UV index in Riverside typically reaches 6, which falls under the high exposure category.

Data source: Riverside October 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 October Weather in Riverside Compares to Other Months

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

This table compares monthly weather conditions in Riverside, showing how October’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	-3°C (27°F)	53 mm (2.1 inches)	91%	moderate
February Weather	0°C (31°F)	63 mm (2.5 inches)	92%	moderate
March Weather	5°C (42°F)	58 mm (2.3 inches)	84%	high
April Weather	10°C (49°F)	60 mm (2.4 inches)	74%	very high
May Weather	15°C (59°F)	44 mm (1.7 inches)	62%	very high
June Weather	22°C (71°F)	19 mm (0.7 inches)	56%	extreme
July Weather	27°C (80°F)	12 mm (0.5 inches)	44%	extreme
August Weather	25°C (77°F)	16 mm (0.6 inches)	37%	very high
September Weather	19°C (67°F)	34 mm (1.3 inches)	46%	very high
October Weather	10°C (50°F)	41 mm (1.6 inches)	67%	high
November Weather	4°C (39°F)	38 mm (1.5 inches)	84%	moderate
December Weather	-2°C (28°F)	42 mm (1.7 inches)	88%	moderate