Weather in Portland in June

Prime time. June is about as good as Portland gets. Highs average 22.2 °C, lows 11 °C, and rain falls on 10 days — nothing in the month is working against you.

June ranks 3 of 12 in Portland. Only July scores clearly higher, and the difference is small enough to be settled by price rather than weather.

Rain on 10 days, 1 of them heavy. Enough to need a plan B, not enough to need a plan around it. Nothing specialised needed — this is the month you pack for the trip rather than for the weather.

What the averages hide

The averages here are honest — no hidden extremes worth planning around. Across the twenty years measured, the hottest June day reached 39.4 °C and the coldest night fell to 5.6 °C, and the wettest single day dropped 25 mm — roughly 45% of the month's rain in one day.

June is moderately variable: 13 mm in the driest year against 113 mm in the wettest, around an average of 55 mm. Roughly two Junes in three land near that average, and the third does something else entirely.

Wind is light at 2.6 km/h, so the temperature on the page is close to the temperature on your skin, and humidity runs at 80%, high enough to notice on the warm days without dominating them.

How June sits in the year

The month is on the way up: 3 °C warmer than May, and July adds another 6.1 °C. Late in the month feels noticeably different from the start of it, which is worth knowing if the trip is short. Rain is the thing that moves: July brings 7 days less of it, so pushing the dates later buys drier weather.

Daylight in June

June is at or near the longest days of Portland's year: 15.7 hours of daylight, holding steady all month. Evenings are the real gain — dinner outdoors still happens in full light.

An inland climate

With no coast nearby, the year swings a fair way — 27.7 °C between the warmest afternoons and the coldest nights, wider than any coastal city at this latitude would manage.

How busy it gets

Peak season. Expect the highest prices of the year and to be booking well ahead.

Crowd levels are estimated from climate desirability and school-holiday calendars, not from visitor numbers.

June in Portland versus nearby

If Portland is one option among several, the nearby comparison is worth making. Eugene is close enough to be a coin toss — within a degree on temperature, 2 days less rain. Seattle is close enough to be a coin toss — 2.1 °C cooler, 1 day more rain.

So: June is effectively as good as it gets here — 6 points behind July, which is inside the margin where the weather stops being the deciding factor and price starts being it.

Every month in Portland

See all twelve months in Portland, or where else to go in June.