October Weather in Walnut, United States

Last updated: June 24, 2025

In October, the average temperature in Walnut, United States is a comfortable 18°C (65°F). However, be prepared for a range, as temperatures can dip to a chilly 0°C (33°F) or soar up to a sweltering 37°C (98°F). With an average humidity of 73%, the air can feel quite moist. Expect 113 mm (4.4 in) of precipitation spread over 8 days during the month, so don’t forget to pack your umbrella!

October Temperature in Walnut

In October in Walnut, the average temperature is 18°C (65°F). The maximum can reach 37°C (98°F), while the minimum can drop as low as 0°C (33°F). This variety in temperatures makes Walnut an ideal destination for travelers seeking both warm days and cool evenings.

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

The chart illustrates October temperature patterns in Walnut, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Walnut, October typically has an average temperature of 18°C (65°F), with highs reaching up to 37°C (98°F) and lows dropping to around 0°C (33°F).

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

October Precipitation in Walnut

In Walnut in October, the precipitation amount is 113 mm (4.4 in) over a span of 8 days.

October Precipitation Trends in Walnut

The chart displays monthly precipitation patterns in Walnut, 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 Walnut, October typically receives around 113 mm (4.4 inches) of precipitation spread over approximately 8 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 Walnut

In Walnut in October, humidity is 73%. With an average temperature of 18°C (65°F), this humidity feels like a warm, slightly muggy embrace that can make exploring the outdoors a bit sticky, yet still pleasant for leisurely strolls and sightseeing.

October Average Humidity in Walnut

This chart illustrates the average monthly humidity levels in Walnut, 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 Walnut is approximately 73%, 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 Walnut

In Walnut 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 Walnut.

Maximum UV Index Levels in Walnut for October

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

Data source: Walnut 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 Walnut Compares to Other Months

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

This table compares monthly weather conditions in Walnut, showing how October’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	6°C (43°F)	107 mm (4.2 inches)	86%	moderate
February Weather	8°C (47°F)	176 mm (6.9 inches)	85%	high
March Weather	13°C (55°F)	157 mm (6.2 inches)	84%	very high
April Weather	16°C (61°F)	148 mm (5.8 inches)	81%	very high
May Weather	22°C (71°F)	109 mm (4.3 inches)	83%	extreme
June Weather	26°C (78°F)	112 mm (4.4 inches)	83%	extreme
July Weather	27°C (81°F)	131 mm (5.2 inches)	80%	extreme
August Weather	26°C (79°F)	116 mm (4.6 inches)	73%	very high
September Weather	24°C (76°F)	122 mm (4.8 inches)	70%	very high
October Weather	18°C (65°F)	113 mm (4.4 inches)	73%	high
November Weather	10°C (50°F)	79 mm (3.1 inches)	85%	moderate
December Weather	8°C (47°F)	147 mm (5.8 inches)	88%	moderate