Climate averages 1991–2020
Eugene weather
in December.
A cool, very wet month: the coolest and the wettest of the year.
Long-term climate patterns, not a forecast for a particular trip.
December is a cool month in Eugene: daytime highs average 8.2°C and nights cool to about 1.2°C. By daytime temperature it is the coolest month of the year.
Expect about 206 mm of rain on roughly 17 days, which makes December a very wet month (the wettest month of the year). Daylight, from sunrise to sunset, lasts about 8 h 57 min on an average December day.
The nearest other city in this atlas is Salem, United States (99 km away). In December its highs average 8.1°C, about as warm as Eugene, with 181 mm of rain.
Among the 498 cities listed in the United States, Eugene ranks joint 281st of 498 for the warmest December highs and joint 493rd of 498 for the driest December (rainfall, lowest first). The mean December high of those 498 cities is 10.5°C; Eugene is 2.3°C cooler than that mean.
From December to January, average highs rise by 0.8°C to 9.0°C, and monthly rainfall falls from 206 mm to 176 mm.
The annual picture
December in context
Monthly rainfall
Average total · mmAverages from hourly ERA5 reanalysis data. Actual weather varies from year to year. How these numbers are calculated
Every month, side by side
Eugene climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 9.0°C1.3°C | 1.3°C | 176 | 16.5 | 9.39 h |
| February | 10.5°C1.6°C | 1.6°C | 139 | 15.1 | 10.410 h |
| March | 12.4°C2.9°C | 2.9°C | 160 | 16.9 | 11.912 h |
| April | 14.4°C4.6°C | 4.6°C | 130 | 15.6 | 13.413 h |
| May | 18.0°C7.8°C | 7.8°C | 82 | 10.3 | 14.715 h |
| June | 21.3°C10.3°C | 10.3°C | 43 | 7.3 | 15.415 h |
| July | 27.0°C12.9°C | 12.9°C | 8.6 | 1.5 | 15.115 h |
| August | 27.4°C13.3°C | 13.3°C | 12 | 2.2 | 14.014 h |
| September | 24.3°C11.3°C | 11.3°C | 41 | 5.0 | 12.613 h |
| October | 17.4°C7.3°C | 7.3°C | 107 | 10.6 | 11.011 h |
| November | 11.5°C3.7°C | 3.7°C | 186 | 16.4 | 9.710 h |
| December, selected | 8.2°C1.2°C | 1.2°C | 206 | 17.0 | 9.09 h |
Rainfall is the average of the 30 separate monthly totals. A rain day is a local calendar day with at least 1 mm of precipitation. Daylight is the calculated sunrise-to-sunset length, not measured sunshine.
Compare places
December in nearby cities
- Salem, United States in DecemberUnited States · 99 kmHigh 8.1°C · Low 1.9°C · 181 mm rain
- Bend in DecemberUnited States · 142 kmHigh 3.2°C · Low -4.9°C · 96 mm rain
- Beaverton in DecemberUnited States · 161 kmHigh 7.3°C · Low 1.5°C · 193 mm rain
- Hillsboro in DecemberUnited States · 164 kmHigh 7.4°C · Low 1.7°C · 204 mm rain
- Portland in DecemberUnited States · 167 kmHigh 7.7°C · Low 1.7°C · 193 mm rain
- Gresham in DecemberUnited States · 169 kmHigh 6.8°C · Low 1.0°C · 244 mm rain
- Vancouver, United States in DecemberUnited States · 180 kmHigh 7.2°C · Low 1.3°C · 231 mm rain
- Medford in DecemberUnited States · 193 kmHigh 8.7°C · Low 0.6°C · 158 mm rain
Read the numbers correctly
Climate, not a promise.
These patterns help compare months. They cannot tell you the weather on a specific day of your trip.
Sources, method and limitsHow these numbers are made (what the highs, lows and rain days mean, the sources and the model cell used for Eugene) is explained once on the Eugene year overview and on the Sources, method and limits page.