October Weather in Riverside, United States

Last updated: June 24, 2025

In October, the average temperature in Riverside, United States hovers around 14°C (57°F). Temperature fluctuations can be significant, with a minimum of 0°C (32°F) and a maximum reaching 31°C (89°F). Expect a precipitation of 120 mm (4.7 in) over the course of approximately 12 days, contributing to an average humidity level of 79%.

October Temperature in Riverside

In October in Riverside, the average temperature is 14°C (57°F). Maximums can reach 31°C (89°F), while minimums can drop as low as 0°C (32°F). Be prepared for a range of temperatures when traveling during this month.

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 14°C (57°F), with highs reaching up to 31°C (89°F) and lows dropping to around 0°C (32°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 120 mm (4.7 in) over a period of 12 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 120 mm (4.7 inches) of precipitation spread over approximately 12 days.

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

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Millimeters (mm) Inches (in)

October Humidity in Riverside

In Riverside in October humidity is 79%. With an average temperature of 14°C (57°F), this humidity feels like a warm, sticky embrace that can make even short strolls feel exhausting, creating a sense of heaviness in the air that might dampen your adventurous spirit while exploring.

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 79%, 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	-1°C (31°F)	71 mm (2.8 inches)	87%	moderate
February Weather	1°C (33°F)	98 mm (3.9 inches)	85%	moderate
March Weather	4°C (40°F)	89 mm (3.5 inches)	85%	high
April Weather	10°C (51°F)	106 mm (4.2 inches)	83%	very high
May Weather	16°C (62°F)	124 mm (4.9 inches)	75%	very high
June Weather	21°C (70°F)	89 mm (3.5 inches)	73%	very high
July Weather	24°C (76°F)	128 mm (5.0 inches)	65%	very high
August Weather	23°C (74°F)	118 mm (4.6 inches)	62%	very high
September Weather	19°C (67°F)	115 mm (4.5 inches)	66%	very high
October Weather	14°C (57°F)	120 mm (4.7 inches)	79%	high
November Weather	5°C (42°F)	94 mm (3.7 inches)	87%	moderate
December Weather	2°C (35°F)	88 mm (3.5 inches)	85%	low