October Weather in Riverside, United States

Last updated: June 24, 2025

In October, the average temperature in Riverside, United States hovers around 16°C (61°F), making it a pleasant time to visit. However, be prepared for a temperature range that can dip as low as 1°C (34°F) and soar up to 35°C (95°F). This month sees an average precipitation of 106 mm (4.2 in) over 9 days, contributing to a relatively high humidity level of 81%. Whether you're basking in the warmth or dodging occasional showers, it's all part of the charm!

October Temperature in Riverside

In October, in Riverside, the average temperature is 16°C (61°F). The maximum can reach 35°C (95°F), while the minimum can be as low as 1°C (34°F). Travelers should be prepared for a wide range of temperatures, ensuring they pack layers for both warm afternoons and cooler nights.

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 16°C (61°F), with highs reaching up to 35°C (95°F) and lows dropping to around 1°C (34°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 total precipitation amount is 106 mm (4.2 in), spread over the course of 9 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 106 mm (4.2 inches) of precipitation spread over approximately 9 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 81%. With an average temperature of 16°C (61°F), this humidity feels like a warm, heavy blanket wrapping around you as you explore the sights, making it essential to stay hydrated and take regular breaks in the shade.

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 81%, 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 7, which corresponds to the high Exposure Category. This means that the time to burn is approximately 25 minutes. For more detailed information, you can check the 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 7, 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	2°C (36°F)	60 mm (2.4 inches)	84%	moderate
February Weather	4°C (40°F)	99 mm (3.9 inches)	83%	moderate
March Weather	7°C (45°F)	89 mm (3.5 inches)	83%	high
April Weather	13°C (56°F)	94 mm (3.7 inches)	81%	very high
May Weather	18°C (65°F)	139 mm (5.5 inches)	78%	very high
June Weather	23°C (74°F)	133 mm (5.2 inches)	79%	very high
July Weather	26°C (80°F)	168 mm (6.6 inches)	74%	very high
August Weather	25°C (77°F)	148 mm (5.8 inches)	72%	very high
September Weather	21°C (71°F)	105 mm (4.1 inches)	75%	very high
October Weather	16°C (61°F)	106 mm (4.2 inches)	81%	high
November Weather	8°C (47°F)	84 mm (3.3 inches)	85%	moderate
December Weather	4°C (40°F)	95 mm (3.7 inches)	84%	moderate