Weather in Portland
Live weather and 7-day forecast for Portland, United States, followed by what to expect in each month of the year.
Sunrise 07:37 Sunset 18:15 Daylight 10h 38m Sun times →
Next 24 hours
7-day forecast
Forecast data from Open-Meteo
Climate in Portland: month by month
Averaged over 2023–2025, the warmest month in Portland is August, with highs around 30 °C (86 °F) and lows around 16 °C (60 °F); the coolest is January, with highs around 8 °C (46 °F) and lows around 2 °C (35 °F).
Portland gets about 1,445 mm (57 in) of precipitation a year. The wettest month is December (273 mm over about 19 days) and the driest is July (4 mm).
| Month | Avg high | Avg low | Precipitation (in) | Wet days | Daylight |
|---|---|---|---|---|---|
| January | 46° | 35° | 7.3 | 18 | 9h 6m |
| February | 48° | 35° | 6.2 | 17 | 10h 25m |
| March | 54° | 38° | 6.4 | 22 | 11h 53m |
| April | 60° | 42° | 4.5 | 14 | 13h 31m |
| May | 70° | 48° | 2.5 | 11 | 14h 54m |
| June | 77° | 53° | 1.6 | 5 | 15h 40m |
| July | 87° | 59° | 0.2 | 2 | 15h 20m |
| August | 86° | 60° | 0.7 | 3 | 14h 8m |
| September | 78° | 55° | 2.1 | 7 | 12h 34m |
| October | 64° | 48° | 5.7 | 12 | 10h 59m |
| November | 53° | 42° | 8.8 | 17 | 9h 31m |
| December | 50° | 41° | 10.7 | 19 | 8h 44m |
Averages of daily values from the ERA5 reanalysis for 2023–2025 at Portland's coordinates (model elevation 25 m), via Open-Meteo (CC BY 4.0). Three recent years are not a 30-year climate normal; reanalysis smooths local extremes and tends to count more light-rain days than a rain gauge would. Daylight is sunrise to sunset on the 15th of each month.
Weather questions for Portland
What is the hottest month in Portland?
August, with average highs of 30 °C (86 °F) and lows of 16 °C (60 °F) over 2023–2025. The coolest month is January, averaging 8 °C (46 °F) by day and 2 °C (35 °F) at night.
What is the rainiest month in Portland?
December, with about 273 mm of precipitation on roughly 19 days. The driest month is July (4 mm), and the yearly total is around 1,445 mm.
When is the weather mildest in Portland?
Going by the averages, May–June and September are the months with average daytime highs between 18 °C and 27 °C (64–81 °F) — warm but not hot. December is the month most likely to bring rain.
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About this forecast
The live forecast comes from Open-Meteo, which blends models from national weather services and is fetched fresh in your browser on each visit. Times in the hourly outlook are Portland local time (America/Los_Angeles).