Last updated: June 24, 2025
In October, the average temperature in Portland, United States is a comfortable 14°C (58°F). However, be prepared for a wide range in temperatures, with minimums dipping to -1°C (30°F) and maximums soaring up to 33°C (91°F). Expect about 130 mm (5.1 in) of precipitation spread over 11 days, accompanied by an average humidity of 74%. Stay hydrated and enjoy the variety!
In October in Portland, the average temperature is 14°C (58°F), with maximums reaching 33°C (91°F) and minimums dropping as low as -1°C (30°F). Be prepared for a wide range of temperatures, making it essential to pack layers for your travels.
In Portland in October, the total precipitation amount is 130 mm (5.1 in) occurring over 11 days.
In Portland in October humidity is 74%. With an average temperature of 14°C (58°F), this humidity feels like a thick blanket wrapping around you, making outdoor activities slightly uncomfortable and prompting travelers to seek shade or indoor venues more often.
In Portland 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 Portland, you can refer to this Hourly UV Index in Portland.
UV Risk Categories
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.
Temperature | Precipitation | Humidity | UV | |
---|---|---|---|---|
January Weather | 0°C (32°F) | 67 mm (2.6 inches) | 84% | moderate |
February Weather | 1°C (34°F) | 89 mm (3.5 inches) | 82% | moderate |
March Weather | 4°C (40°F) | 90 mm (3.6 inches) | 81% | high |
April Weather | 10°C (49°F) | 126 mm (5.0 inches) | 78% | very high |
May Weather | 15°C (60°F) | 111 mm (4.4 inches) | 69% | very high |
June Weather | 20°C (69°F) | 94 mm (3.7 inches) | 69% | very high |
July Weather | 24°C (75°F) | 156 mm (6.1 inches) | 62% | very high |
August Weather | 23°C (74°F) | 96 mm (3.8 inches) | 65% | very high |
September Weather | 20°C (67°F) | 99 mm (3.9 inches) | 68% | very high |
October Weather | 14°C (58°F) | 130 mm (5.1 inches) | 74% | high |
November Weather | 7°C (44°F) | 90 mm (3.6 inches) | 82% | moderate |
December Weather | 2°C (36°F) | 127 mm (5.0 inches) | 80% | low |