Weather in Eugene in May

A good month. May is a solid month to be in Eugene. Highs average 18.5 °C, lows 8.1 °C, and rain falls on 12 days — nothing in the month is working against you.

May ranks 5 of 12 in Eugene: past the worst of the year but short of July, which is the month to book if the dates are open.

Rain on 12 days, 2 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

Averages flatten a month, and this one hides a few things: it never really gets hot: not one day in an average May reaches 30 °C. Across the twenty years measured, the hottest May day reached 35.2 °C and the coldest night fell to 1.1 °C, and the wettest single day dropped 31 mm — roughly 41% of the month's rain in one day.

May is moderately variable: 16 mm in the driest year against 169 mm in the wettest, around an average of 75 mm. Roughly two Mays in three land near that average, and the third does something else entirely.

Wind is light at 0.3 km/h, so the temperature on the page is close to the temperature on your skin, and humidity runs at 84%, high enough to notice on the warm days without dominating them.

How May sits in the year

The month is on the way up: 3.7 °C warmer than April, and June adds another 2.6 °C. Late in the month feels noticeably different from the start of it, which is worth knowing if the trip is short.

Daylight in May

14.7 hours of daylight, gaining 1.1 hours across the month. That is between Eugene's extremes of 15.5 and 8.9 hours, so days are long enough not to constrain the plan.

An inland climate

With no coast nearby, the year swings a fair way — 25.1 °C between the warmest afternoons and the coldest nights, wider than any coastal city at this latitude would manage.

How busy it gets

Shoulder. The value months — prices ease off and you get the place closer to itself.

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

May in Eugene versus nearby

If Eugene is one option among several, the nearby comparison is worth making. Portland is close enough to be a coin toss — within a degree on temperature, 1 day more rain. Tri-Cities is a better bet in May — 6 °C warmer, 5 days less rain.

So: May is a compromise. July is 24 points better and is what Eugene is actually like at its best — worth moving the trip for if that is possible, and worth adjusting expectations for if it is not.

Every month in Eugene

See all twelve months in Eugene, or where else to go in May.