Weather in Eugene in August

Prime time. August is about as good as Eugene gets. Highs average 27.7 °C, lows 12.9 °C, and rain falls on 2 days — nothing in the month is working against you.

August ranks 2 of 12 in Eugene. Only July scores clearly higher, and the difference is small enough to be settled by price rather than weather.

Rain falls on only 2 days, so an itinerary with no wet-weather fallback is a reasonable risk. 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: 8 days top 30 °C — hot spells arrive, but they break. Across the twenty years measured, the hottest August day reached 41.3 °C and the coldest night fell to 7.8 °C.

This is the volatile part. August rainfall has ranged from 1 mm to 62 mm across the twenty years measured — a 61 mm spread around an average of 13 mm. The average is real but almost no individual August looks like it, so treat the figure as the middle of a wide range rather than a forecast.

Wind is light at 0.4 km/h, so the temperature on the page is close to the temperature on your skin, and humidity is unremarkable at 73%.

How August sits in the year

This is a turning point in the year — July and September sit on opposite sides of it, so the month contains the change rather than following it.

Daylight in August

14.1 hours of daylight, losing 1.3 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. Within August itself the daily swing is 14.9 °C, so mornings and afternoons need different clothes.

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.

August in Eugene versus nearby

If Eugene is one option among several, the nearby comparison is worth making. Portland is the weaker option in August — 2.2 °C warmer, 1 day more rain. Tri-Cities is the weaker option in August — 5.5 °C warmer, the same number of rain days.

So: August is effectively as good as it gets here — 3 points behind July, which is inside the margin where the weather stops being the deciding factor and price starts being it.

Every month in Eugene

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