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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). While you might experience a chilly minimum of -2°C (29°F), sunny days can soar up to a warm 32°C (90°F). Be prepared for 112 mm (4.4 in) of precipitation, typically spread over 10 days, coupled with an average humidity level of 72%. Stay comfortable and ready for any weather!

October Temperature in Riverside

In October in Riverside, the average temperature is 14°C (57°F), with maximums reaching 32°C (90°F) and minimums dropping as low as -2°C (29°F). Travelers should be prepared for a wide range of temperatures during this time.

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 32°C (90°F) and lows dropping to around -2°C (29°F).
JanFebMarAprMayJunJulAugSepOctNovDec303246546677797672574437
Data source: Temperature data for Riverside generated using information from the Copernicus Climate Change Service.
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The average of daily temperatures (24 hours) calculated across all days in the month.

October Precipitation in Riverside

In Riverside in October, the total precipitation amount is 112 mm (4.4 in) over the course of 10 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 112 mm (4.4 inches) of precipitation spread over approximately 10 days.
JanFebMarAprMayJunJulAugSepOctNovDec5336948220792104117751124534
Data source: Precipitation data for October generated using information from the Copernicus Climate Change Service.
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October Humidity in Riverside

In Riverside in October humidity is 72%. With an average temperature of 14°C (57°F), this humidity feels like a damp embrace, making outdoor activities slightly uncomfortable and requiring careful planning to stay hydrated and enjoy your travels.

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 72%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec80%78%75%77%82%83%81%78%72%72%84%86%
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.
JanFebMarAprMayJunJulAugSepOctNovDec3569101111109643
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.
 TemperaturePrecipitationHumidityUV
January Weather-1°C (31°F)53 mm (2.1 inches)80%moderate
February Weather0°C (32°F)36 mm (1.4 inches)78%moderate
March Weather8°C (46°F)94 mm (3.7 inches)75%high
April Weather12°C (54°F)82 mm (3.2 inches)77%very high
May Weather19°C (66°F)207 mm (8.1 inches)82%very high
June Weather25°C (77°F)92 mm (3.6 inches)83%extreme
July Weather26°C (80°F)104 mm (4.1 inches)81%extreme
August Weather25°C (77°F)117 mm (4.6 inches)78%very high
September Weather22°C (72°F)75 mm (2.9 inches)72%very high
October Weather14°C (57°F)112 mm (4.4 inches)72%high
November Weather6°C (44°F)45 mm (1.8 inches)84%moderate
December Weather3°C (37°F)34 mm (1.3 inches)86%moderate

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