Climate averages 1991–2020
Eugene weather
in September.
A warm, moderately wet month: the 3rd warmest and the 3rd driest of the year. Meets the pleasant-weather rule
Long-term climate patterns, not a forecast for a particular trip.
September is a warm month in Eugene: daytime highs average 24.3°C and nights cool to about 11.3°C. By daytime temperature it is the 3rd warmest of the 12 months.
Expect about 41 mm of rain on roughly 5 days, which makes September a moderately wet month (the 3rd driest of the 12 months). Daylight, from sunrise to sunset, lasts about 12 h 34 min on an average September day.
The nearest other city in this atlas is Salem, United States (99 km away). In September its highs average 24.5°C, about as warm as Eugene, with 32 mm of rain.
Among the 498 cities listed in the United States, Eugene ranks joint 336th of 498 for the warmest September highs and 165th of 498 for the driest September (rainfall, lowest first). The mean September high of those 498 cities is 26.9°C; Eugene is 2.6°C cooler than that mean.
From September to October, average highs fall by 6.8°C to 17.4°C, and monthly rainfall rises from 41 mm to 107 mm.
The annual picture
September 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, selected | 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 | 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
September in nearby cities
- Salem, United States in SeptemberUnited States · 99 kmHigh 24.5°C · Low 12.0°C · 32 mm rain
- Bend in SeptemberUnited States · 142 kmHigh 22.9°C · Low 7.9°C · 16 mm rain
- Beaverton in SeptemberUnited States · 161 kmHigh 23.7°C · Low 12.0°C · 42 mm rain
- Hillsboro in SeptemberUnited States · 164 kmHigh 23.7°C · Low 12.2°C · 43 mm rain
- Portland in SeptemberUnited States · 167 kmHigh 24.1°C · Low 12.3°C · 42 mm rain
- Gresham in SeptemberUnited States · 169 kmHigh 22.8°C · Low 11.3°C · 58 mm rain
- Vancouver, United States in SeptemberUnited States · 180 kmHigh 23.5°C · Low 12.0°C · 62 mm rain
- Medford in SeptemberUnited States · 193 kmHigh 26.9°C · Low 11.7°C · 22 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.