The best time to visit Portland
Month-by-month climate averages for Portland, OR, so you can pick your dates on data rather than guesswork.
The most comfortable time to visit Portland is usually May, June, September and October, when daytime highs sit in the pleasant 60-78°F range and the heaviest December rain is behind you.
Portland is warmest in July (highs near 86°F) and coldest in January (lows around 35°F), with roughly 59 inches of precipitation across the year and December the wettest month. The sweet spot for most visitors is May, June, September and October.
These are long-run averages. For the actual days you are travelling, check the live Portland forecast — and note how much the models agree, because that tells you how much to trust it.
Portland weather by month
what to expect in Portland through the yearHere is Portland's typical weather in each month: the average daytime high and overnight low in °F, how each month feels, and the wettest month marked. Use it to plan any trip to Portland by season.