The weather in Portland for the next 30 days
This chart shows the temperature in Portland for the next 30 days, displayed in degrees Celsius. The long-term weather forecast is based on the 14-day weather prediction and the average historical weather data for Portland from the past 10 years. We take the changing climate into account, so you know what you can typically expect during this period.
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Precipitation in Portland for the next 30 days
This chart shows the precipitation in Portland for the next 30 days, measured in millimetres. We base this on the current 14-day weather forecast, followed by the average daily precipitation over the past 10 years.
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3 3 2 2 1 1 4 4 3 3 4 4 4 3 3 3 4 4 4 3 3Average 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.
