Climate averages 1991–2020
Eugene weather
in May.
A mild, moderately wet month: the 5th warmest and the 5th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
May is a mild month in Eugene: daytime highs average 18.0°C and nights cool to about 7.8°C. By daytime temperature it is the 5th warmest of the 12 months.
Expect about 82 mm of rain on roughly 10 days, which makes May a moderately wet month (the 5th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 14 h 44 min on an average May day.
The nearest other city in this atlas is Salem, United States (99 km away). In May its highs average 18.6°C, 0.5°C warmer than Eugene, with 56 mm of rain.
Among the 498 cities listed in the United States, Eugene ranks joint 470th of 498 for the warmest May highs and joint 228th of 498 for the driest May (rainfall, lowest first). The mean May high of those 498 cities is 23.8°C; Eugene is 5.8°C cooler than that mean.
From May to June, average highs rise by 3.3°C to 21.3°C, and monthly rainfall falls from 82 mm to 43 mm.
The annual picture
May 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, selected | 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 | 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
May in nearby cities
- Salem, United States in MayUnited States · 99 kmHigh 18.6°C · Low 8.2°C · 56 mm rain
- Bend in MayUnited States · 142 kmHigh 16.9°C · Low 4.4°C · 45 mm rain
- Beaverton in MayUnited States · 161 kmHigh 18.5°C · Low 8.3°C · 70 mm rain
- Hillsboro in MayUnited States · 164 kmHigh 18.6°C · Low 8.4°C · 69 mm rain
- Portland in MayUnited States · 167 kmHigh 18.8°C · Low 8.8°C · 70 mm rain
- Gresham in MayUnited States · 169 kmHigh 17.8°C · Low 7.9°C · 89 mm rain
- Vancouver, United States in MayUnited States · 180 kmHigh 18.5°C · Low 8.5°C · 89 mm rain
- Medford in MayUnited States · 193 kmHigh 20.3°C · Low 8.0°C · 78 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.