October Weather in Santa Ana, United States

Last updated: June 24, 2025

In Santa Ana, United States, the average temperature in October is a pleasant 20°C (69°F). Expect temperatures to range from a cool 10°C (50°F) to a warm 38°C (101°F). Additionally, anticipate a modest precipitation amount of 10 mm (0.4 in) over just 1 day. With an average humidity of 67%, the climate strikes a comfortable balance ideal for exploration or relaxation.

October Temperature in Santa Ana

In October in Santa Ana, the average temperature is 20°C (69°F). The maximum can reach 38°C (101°F), while the minimum can dip as low as 10°C (50°F). Overall, it's a great time to visit Santa Ana if you enjoy mild to warm weather with occasional heat.

October Weather in Santa Ana: Daily Temperature Highs, Lows, and Averages

The chart illustrates October temperature patterns in Santa Ana, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Santa Ana, October typically has an average temperature of 20°C (69°F), with highs reaching up to 38°C (101°F) and lows dropping to around 10°C (50°F).

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

October Precipitation in Santa Ana

In Santa Ana in October, the precipitation amount is 10 mm (0.4 in) over the course of 1 day.

October Precipitation Trends in Santa Ana

The chart displays monthly precipitation patterns in Santa Ana, 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 Santa Ana, October typically receives around 10 mm (0.4 inches) of precipitation spread over approximately 1 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 Santa Ana

In Santa Ana in October, humidity is 67%. With an average temperature of 20°C (69°F), this humidity feels like a warm, gentle embrace that clings to your skin, creating a comfortable yet slightly sticky atmosphere that can be refreshing while exploring the sights, provided you stay hydrated and take breaks in the shade.

October Average Humidity in Santa Ana

This chart illustrates the average monthly humidity levels in Santa Ana, 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 Santa Ana 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 Santa Ana

In Santa Ana 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 Santa Ana.

Maximum UV Index Levels in Santa Ana for October

The chart shows the monthly maximum UV Index (UVI) for Santa Ana 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 Santa Ana typically reaches 7, which falls under the high exposure category.

Data source: Santa Ana 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 Santa Ana Compares to Other Months

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

This table compares monthly weather conditions in Santa Ana, showing how October’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	13°C (56°F)	71 mm (2.8 inches)	74%	moderate
February Weather	13°C (56°F)	60 mm (2.3 inches)	79%	high
March Weather	14°C (58°F)	68 mm (2.7 inches)	75%	very high
April Weather	17°C (62°F)	27 mm (1.1 inches)	70%	very high
May Weather	17°C (64°F)	13 mm (0.5 inches)	70%	extreme
June Weather	20°C (68°F)	1 mm (0.0 inches)	72%	extreme
July Weather	23°C (73°F)	2 mm (0.1 inches)	73%	extreme
August Weather	23°C (74°F)	2 mm (0.1 inches)	69%	very high
September Weather	22°C (72°F)	3 mm (0.1 inches)	68%	very high
October Weather	20°C (69°F)	10 mm (0.4 inches)	67%	high
November Weather	17°C (62°F)	25 mm (1.0 inches)	68%	moderate
December Weather	13°C (56°F)	74 mm (2.9 inches)	71%	moderate