United StatesAverage weather for Portland in October
It's cool to moderate in October in Portland with an average temperature of 16°C. Temperatures this month range from a low of 12°C to a high of 20°C. At night, you can expect temperatures between 3°C and 11°C.
Start of October
The month of October starts in Portland with mild temps, averaging around 18°C during the day and nights around 9°C. A few showers might pop up early in the month, but overall, it’ll stay mostly sunny and dry.
Mid October
By mid-October, daytime temps drop to around 17°C, with nights around 7°C. During this part of the month, you might see regular precipitation, but there will also be some sunny days.
End of October
By the end of October, the average daytime temperature in Portland is around 14°C, while nighttime temps are about 6°C. There’s a significant chance of many days with precipitation.
Water temperature
The water temperature at Portland is 16°C this month. This is probably too cold to swim without protective gear.
In October, there is an average of 140 mm of precipitation, spread over 9 days. The wind speed is around 4 Bft, mostly coming from the South.
Portland in October |
New York | ||
|---|---|---|---|
 Average temperature |
16°C | 21°C | |
 Max. temperature |
20°C | 26°C | |
| Min. temperature |
12°C | -5°C | |
 Total precipitation |
140 mm | 119 mm | |
| Rainy days |
9 days | 13 days | |
September
UV index
The UV index is a maximum of 4 this month. That's a moderate value on the intensity scale of 1 to 11. Unprotected skin can burn in about 30 minutes.
Is October a good time to visit Portland?
Looking for sun and warm weather? October isn’t a good month to be in Portland. The temperatures are too low for a warm stay this month.
Temperature records
With 29°C in 2018, Portland reached the highest temperature in October over the past 10 years. The lowest daytime temperature in this month was 3°C in 2020. The extreme nighttime temperatures ranged from a lowest recorded value of -6°C to a highest value of 18°C.
Check out the climate of Portland for all months and discover the best travel time
Daily Temperature in October in Portland
This chart shows the average daily high and low temperatures in October for Portland, in degrees Celsius. The red line represents the highs, and the blue line shows the lows. The days of the month are displayed at the bottom of the chart. The data, based on historical observations, provide the average temperatures for this month.
Daily Precipitation in October in Portland
The chart below shows the average daily precipitation in October for Portland, measured in millimeters over the past few years. Precipitation is always measured as water, even if it’s snow or hail. The days of the month are listed at the bottom of the chart.
A low average precipitation means that the chance of rain on that day is usually small, while a higher average suggests that it rained more often. But remember, it’s just an average, and every day can be different. Based on historical weather data for October, you can expect about 9 days of precipitation in Portland.
Daily UV index in October in Portland
This chart shows the average daily UV index in October in Portland, with the UV index ranging from 0 to a maximum of 11. The bottom of the chart shows the days of the month. Based on historical data, this chart provides an idea of the daily UV radiation levels you can expect.
Temperature in October in Portland over the years
This chart shows the average temperature in October in Portland, measured in degrees Celsius, over the past few years.
Total precipitation in October in Portland over the years
This chart shows the average precipitation in October in Portland, measured in millimeters over the past years. Precipitation is always measured as water, whether it’s snow or hail.
Daily weather in October for Portland
Click on any day in October to get detailed info about the usual weather on that day in Portland. Check out the historical temperatures and precipitation over the past 10 years on this day.
Weather experiences in October in Portland
Have you been to Portland in October?
Share your weather experience in October in Portland.
Average weather in Portland by month
Click on a month below to see detailed weather info for Portland. Based on historical weather data, you can see the average temperature, precipitation, wind, and UV index for each day of the month.
