October Weather in Portland, Australia

Last updated: August 22, 2025

In October, the average temperature in Portland, Australia hovers around 13°C (56°F). The temperatures can vary, dipping to a minimum of 6°C (44°F) and peaking at a warm 27°C (81°F). Expect some rain, with an average precipitation of 74 mm (2.9 in) spread over 11 days. Overall, the air feels quite humid, with an average humidity of 76%.

October Temperature in Portland

In October in Portland, the average temperature is 13°C (56°F), with maximums reaching up to 27°C (81°F) and minimums dropping as low as 6°C (44°F). This range makes it a perfect time for travelers looking to enjoy mild weather and outdoor activities.

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

The chart illustrates October temperature patterns in Portland, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Portland, October typically has an average temperature of 13°C (56°F), with highs reaching up to 27°C (81°F) and lows dropping to around 6°C (44°F).

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

October Precipitation in Portland

In Portland in October, the precipitation amount is 74 mm (2.9 in) spread over the course of 11 days.

October Precipitation Trends in Portland

The chart displays monthly precipitation patterns in Portland, 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 Portland, October typically receives around 74 mm (2.9 inches) of precipitation spread over approximately 11 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 Portland

In Portland in October humidity is 76%. With an average temperature of 13°C (56°F), this humidity feels like a damp blanket enveloping you, making travel a bit uncomfortable as you navigate through the heavy, moisture-laden air.

October Average Humidity in Portland

This chart illustrates the average monthly humidity levels in Portland, 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 Portland is approximately 76%, 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 Portland

In Portland in October, the maximum UV index is 9, which corresponds to a very high Exposure Category. The time to burn is just 15 minutes, so it's essential to take precautions. For detailed information, you can check the Hourly UV Index in Portland.

Maximum UV Index Levels in Portland for October

The chart shows the monthly maximum UV Index (UVI) for Portland 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 Portland typically reaches 9, which falls under the very high exposure category.

Data source: Portland 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 Portland Compares to Other Months

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

This table compares monthly weather conditions in Portland, showing how October’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	18°C (64°F)	32 mm (1.3 inches)	76%	extreme
February Weather	17°C (63°F)	31 mm (1.2 inches)	75%	extreme
March Weather	17°C (63°F)	35 mm (1.4 inches)	76%	very high
April Weather	15°C (60°F)	51 mm (2.0 inches)	76%	high
May Weather	13°C (56°F)	92 mm (3.6 inches)	79%	moderate
June Weather	11°C (53°F)	81 mm (3.2 inches)	78%	moderate
July Weather	11°C (52°F)	122 mm (4.8 inches)	78%	moderate
August Weather	11°C (52°F)	113 mm (4.4 inches)	77%	moderate
September Weather	12°C (54°F)	86 mm (3.4 inches)	76%	high
October Weather	13°C (56°F)	74 mm (2.9 inches)	76%	very high
November Weather	15°C (59°F)	68 mm (2.7 inches)	76%	extreme
December Weather	16°C (61°F)	44 mm (1.7 inches)	76%	extreme