Temperatures 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.
Max and Min Temperatures per Day
This chart shows the daily maximum and minimum temperatures in degrees Celsius for Portland in October. The red line indicates the max temperatures, and the blue line shows the minimums.
Start of October
The month of October starts in Portland with mild temperatures, averaging around 18°C during the day and nights close to 9°C. A few showers might pop up in the first days of the month, but the weather remains mostly sunny and dry.
Mid-October
By mid-October, the average daytime temperature drops to around 17°C, with nights close to 7°C. During this part of the month, you can expect regular precipitation, but there’ll also be some sunny days.
End of October
By the end of October, the average daytime temperature in Portland will be around 14°C, with nights close to 6°C. There’s a significant chance of many days with precipitation.
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Water temperature
The water temperature at Portland is 16°C this month. This is probably too cold to swim without protective gear.
Precipitation in October
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.
The average precipitation chance is 30% per day this month. Though it seems pretty low, the weather’s variable. Some days have higher and others lower precipitation chances, which lowers the average.
Precipitation Chance
This chart shows the daily precipitation chance (in percentages) in October for Portland. 0% means it never rained on that day in the past 10 years, and 100% means it rained every day. All values in between represent the average chance of precipitation on that day.
Portland in October |
London | ||
|---|---|---|---|
 Average Temperature |
16°C | 15°C | |
 High Temp |
20°C | 17°C | |
| Low Temp |
12°C | 13°C | |
 Total Precipitation |
140 mm | 115 mm | |
| Rainy Days |
9 days | 14 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? Then October isn’t the best time to be in Portland. The temperature is too low this month for a warm stay.
Temperature records for Portland in October
With 29°C, Portland hit the highest temperature in the last 10 years in October 2018. The lowest daytime temperature in this month was 3°C in 2020. The extreme night temperatures ranged from a low of -6°C to a high of 18°C.
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Daily Temperature in October in Portland
This chart shows the average daily temperatures, both day and night, for each day in October in Portland, measured in degrees Celsius. The red line represents the maximum temperatures, while the blue line shows the minimums. The days of the month are displayed at the bottom of the chart. The data, based on historical observations, gives an overview of the average daily temperatures during this month.
Daily Precipitation in October in Portland
The chart below shows the average daily precipitation in October for Portland, measured in millimetres over the past years. Precipitation is always measured as water, even if it’s snow or hail. The days of the month are shown 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 rain is more likely. But it’s still an average, so each day can be different. Based on historical weather data for October, you can expect around 9 days of rain 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 years.
Total Precipitation in October in Portland Over the Years
This chart shows the average precipitation in October in Portland, measured in millimetres over the past years. Precipitation is always measured as water, even if it’s snow or hail.
Daily climate in October for Portland
Click on a specific day in October for detailed info on the typical 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?
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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.
