October Weather in Portola, United States

Last updated: June 24, 2025

In October, the average temperature in Portola, United States is a crisp 8°C (47°F). Expect a chilly minimum of -8°C (17°F), while the mercury can rise to a maximum of 29°C (84°F). During this time, 43 mm (1.7 in) of precipitation typically falls over 3 days, with average humidity levels around 65%. Plan your activities accordingly!

October Temperature in Portola

In October in Portola, the average temperature is 8°C (47°F), with a maximum that can reach 29°C (84°F) and a minimum that can be as low as -8°C (17°F). Be prepared for varied weather conditions if you're planning to travel during this time.

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

The chart illustrates October temperature patterns in Portola, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Portola, October typically has an average temperature of 8°C (47°F), with highs reaching up to 29°C (84°F) and lows dropping to around -8°C (17°F).

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

October Precipitation in Portola

In Portola in October, the precipitation amount is 43 mm (1.7 in) over a period of 3 days.

October Precipitation Trends in Portola

The chart displays monthly precipitation patterns in Portola, 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 Portola, October typically receives around 43 mm (1.7 inches) of precipitation spread over approximately 3 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 Portola

In Portola in October, humidity is 65%. With an average temperature of 8°C (47°F), this humidity feels like a slight chill in the air, making it refreshing yet slightly uncomfortable for traveling, as it can leave you feeling damp and cool.

October Average Humidity in Portola

This chart illustrates the average monthly humidity levels in Portola, 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 Portola is approximately 65%, 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 Portola

In Portola 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 Portola.

Maximum UV Index Levels in Portola for October

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

Data source: Portola 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 Portola Compares to Other Months

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

This table compares monthly weather conditions in Portola, 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)	170 mm (6.7 inches)	84%	moderate
February Weather	-1°C (30°F)	177 mm (7.0 inches)	84%	high
March Weather	1°C (34°F)	146 mm (5.7 inches)	83%	very high
April Weather	5°C (41°F)	72 mm (2.8 inches)	81%	very high
May Weather	10°C (51°F)	60 mm (2.3 inches)	74%	extreme
June Weather	16°C (62°F)	10 mm (0.4 inches)	64%	extreme
July Weather	21°C (70°F)	10 mm (0.4 inches)	44%	extreme
August Weather	20°C (68°F)	13 mm (0.5 inches)	36%	extreme
September Weather	15°C (60°F)	19 mm (0.7 inches)	44%	very high
October Weather	8°C (47°F)	43 mm (1.7 inches)	65%	high
November Weather	3°C (38°F)	79 mm (3.1 inches)	84%	moderate
December Weather	-2°C (29°F)	132 mm (5.2 inches)	83%	moderate