Climate in Eugene, Oregon: Monthly Weather Averages
Eugene sits at 353 feet above sea level, and its climate, as recorded at the Eugene Mahlon Sweet Airport, OR station, runs to a yearly mean of 53.1°F. The warmest month is August, averaging 67.9°F with typical highs of 84.3°F; the coldest is December, averaging 40.6°F with lows around 34.3°F. Across a normal year the city receives 40.8 in of precipitation. The full month-by-month picture below comes from the official 1991–2020 U.S. Climate Normals — the 30-year averages the National Weather Service itself uses — so it describes the Eugene climate you should actually plan around, whether you are timing a visit, weighing a move, or just settling an argument about which month is best.
Eugene climate month by month
The table below is the complete 1991–2020 normals profile for Eugene: average high, average low and mean temperature, rainfall, and snowfall for every month. Read down the Mean column to feel the year's rhythm — Eugene's temperature range runs from 40.6°F in December to 67.9°F in August.
| Month | Avg High (°F) | Avg Low (°F) | Mean (°F) | Rain (in) | Snow (in) |
|---|---|---|---|---|---|
| January | 48.1 | 34.7 | 41.4 | 6.05 | — |
| February | 51.5 | 35.0 | 43.3 | 4.67 | — |
| March | 56.6 | 37.2 | 46.9 | 4.64 | — |
| April | 61.3 | 40.0 | 50.7 | 3.32 | — |
| May | 68.1 | 44.0 | 56.1 | 2.46 | — |
| June | 74.2 | 47.6 | 60.9 | 1.23 | — |
| July | 84.0 | 51.7 | 67.8 | 0.32 | — |
| August | 84.3 | 51.5 | 67.9 | 0.39 | — |
| September | 78.0 | 47.8 | 62.9 | 1.39 | — |
| October | 64.9 | 41.8 | 53.4 | 3.17 | — |
| November | 53.2 | 37.7 | 45.5 | 5.98 | — |
| December | 46.8 | 34.3 | 40.6 | 7.21 | — |
| Year | 64.2 | 41.9 | 53.1 | 40.83 | — |
How to read the colors:below freezingcoldcoolmildwarmhot. Bands are colored by each cell's own temperature, so a whole year reads at a glance.
NOAA does not publish monthly snowfall normals for this station, so the snow column is shown as —; the temperature and precipitation normals for this station are complete.
Eugene through the seasons
Winter in Eugene averages highs of 46.8–51.5°F and lows of 34.3–35.0°F, a seasonal mean of 41.8°F. The three months together bring 17.9 in of precipitation — about 44% of the city's yearly total — with December the wettest of the three at 7.21 in. It is a genuinely cold season — heavy coats, freezing nights, and the year's most changeable weather — without being locked below freezing around the clock.
Spring in Eugene averages highs of 56.6–68.1°F and lows of 37.2–44.0°F, a seasonal mean of 51.2°F. The three months together bring 10.4 in of precipitation — about 26% of the city's yearly total — with March the wettest of the three at 4.64 in. The season is a transition: the average temperature climbs 9.2°F from March to May, and by late spring Eugene is firmly into mild territory.
Summer in Eugene averages highs of 74.2–84.3°F and lows of 47.6–51.7°F, a seasonal mean of 65.5°F. The three months together bring 1.9 in of precipitation — about 5% of the city's yearly total — with June the wettest of the three at 1.23 in. It is a warm, usable summer: afternoons are hot enough for swimming and lake or coast time, while evenings usually cool off comfortably.
Fall in Eugene averages highs of 53.2–78.0°F and lows of 37.7–47.8°F, a seasonal mean of 53.9°F. The three months together bring 10.5 in of precipitation — about 26% of the city's yearly total — with November the wettest of the three at 5.98 in. Temperatures ease off through the season — the monthly mean drops 17.4°F from September to November — and fall is when Eugene's weather turns cooler and wetter, while nights stay mostly frost-free into December.
Best and worst months to visit Eugene
Ranking every month by its normals — mild mean temperatures score best, heavy rain and snow count against — the most comfortable months to visit Eugene are:
JulyAugustSeptember
July leads the list: average highs of 84.0°F, lows of 51.7°F, and 0.32 in of rain. The other picks, August and September, offer the same balance in Eugene's mild stretch of the year. At the other end, December is usually the month to avoid — the year's heaviest rain, with a mean temperature of 40.6°F and 7.21 in of precipitation.
How Eugene compares
Across the 114 cities in our dataset, the typical city averages 57.8°F for the year and 35.7 in of precipitation. Eugene runs 4.7°F cooler than that typical city and wetter by 5.2 in a year, ranking #74 of 114 for annual warmth and #47 of 114 for precipitation (wettest first). Its year-round temperature swing — warmest month minus coldest — is 27.3°F, which puts it in the mild, ocean- or latitude-softened camp.
Within Oregon, Eugene is #3 of 4 for warmth of the cities we track. See the Oregon climate overview for the full state comparison, including Medford (warmest, 55.9°F yearly mean) and Bend (coolest, 47.6°F).
Planning notes for Eugene
For anyone relocating: average lows never drop below freezing in any month, so hard freezes are events, not seasons; highs reach the 80s on average in 2 months, but 90°F average highs never arrive; days and nights differ by 22.3°F on average — a big desert-style swing that rewards dressing in layers year-round; 5 months of the year average between 55°F and 80°F, the band most people find comfortable without heating or cooling. Those four facts, all straight from the normals table above, shape everything from a Eugene wardrobe to its utility bills.
Eugene climate FAQ
What is the warmest month in Eugene?
August is the warmest month in Eugene, with a mean temperature of 67.9°F, average highs of 84.3°F and average lows of 51.5°F (1991–2020 normals).
What is the coldest month in Eugene?
December is the coldest month, averaging 40.6°F, with highs of 46.8°F and lows of 34.3°F.
How much rain does Eugene get in a year?
Eugene averages 40.83 in of precipitation a year. The wettest month is December (7.21 in) and the driest is July (0.32 in).
When is the best time of year to visit Eugene?
By the normals, the most comfortable months are July, August, September — mild average temperatures with moderate rainfall. December is typically the least comfortable month.
Source: 1991–2020 U.S. Climate Normals, NOAA National Centers for Environmental Information (NCEI) — ncei.noaa.gov. Station: Eugene Mahlon Sweet Airport, OR (USW00024221), elevation 353 ft. Figures checked October 2026.