| Month | High | Low | Rain | Wet days | Score |
|---|---|---|---|---|---|
| January | 8.9° | 1.9° | 155.1mm | 18.6 | 34 |
| February | 10.6° | 1.7° | 114.3mm | 15.6 | 39 |
| March | 13.3° | 2.9° | 107.1mm | 17.8 | 49 |
| April | 16.1° | 4.3° | 74.8mm | 15.1 | 58 |
| May | 19.9° | 6.7° | 56.7mm | 11.7 | 76 |
| June | 23.7° | 8.9° | 29.3mm | 7.5 | 85 |
| July | 29.2° | 11.2° | 6.1mm | 2.3 | 87 |
| August | 29.1° | 11.2° | 8.7mm | 2.6 | 86 |
| September | 25.2° | 9° | 37.1mm | 6.2 | 88 |
| October | 18.1° | 5.7° | 75.4mm | 12.1 | 70 |
| November | 11.7° | 3.4° | 146.7mm | 17.5 | 43 |
| December | 8.1° | 1.6° | 180.1mm | 19 | 31 |
January in Eugene averages a daily high of 8.9°C with nights around 1.9°C. Expect roughly 18.6 wet days totalling 155.1mm. A hard month to visit for comfort alone.
February in Eugene averages a daily high of 10.6°C with nights around 1.7°C. Expect roughly 15.6 wet days totalling 114.3mm. Demanding conditions — pack for it and plan indoor options.
March in Eugene averages a daily high of 13.3°C with nights around 2.9°C. Expect roughly 17.8 wet days totalling 107.1mm. Demanding conditions — pack for it and plan indoor options.
April in Eugene averages a daily high of 16.1°C with nights around 4.3°C. Expect roughly 15.1 wet days totalling 74.8mm. Generally workable, with some weather to plan around.
May in Eugene averages a daily high of 19.9°C with nights around 6.7°C. Expect roughly 11.7 wet days totalling 56.7mm. Comfortable conditions for being outdoors all day.
June in Eugene averages a daily high of 23.7°C with nights around 8.9°C. Expect roughly 7.5 wet days totalling 29.3mm. Comfortable conditions for being outdoors all day.
July in Eugene averages a daily high of 29.2°C with nights around 11.2°C. Rain is rare — about 2.3 wet days and 6.1mm across the month. Comfortable conditions for being outdoors all day.
August in Eugene averages a daily high of 29.1°C with nights around 11.2°C. Rain is rare — about 2.6 wet days and 8.7mm across the month. Comfortable conditions for being outdoors all day.
September in Eugene averages a daily high of 25.2°C with nights around 9°C. Expect roughly 6.2 wet days totalling 37.1mm. Comfortable conditions for being outdoors all day.
October in Eugene averages a daily high of 18.1°C with nights around 5.7°C. Expect roughly 12.1 wet days totalling 75.4mm. Generally workable, with some weather to plan around.
November in Eugene averages a daily high of 11.7°C with nights around 3.4°C. Expect roughly 17.5 wet days totalling 146.7mm. Demanding conditions — pack for it and plan indoor options.
December in Eugene averages a daily high of 8.1°C with nights around 1.6°C. Expect roughly 19 wet days totalling 180.1mm. A hard month to visit for comfort alone.
Each month scores out of 100. It starts at 100 and loses points for daytime highs outside a 20–27°C band, for wet days, and for nights below 2°C. Nothing else is weighted in — no crowd data, no prices, no opinion. Eugene peaks at 88.
Based on 30 years of records, June–September scores highest for comfort in Eugene, balancing daytime temperature against rainfall.
July is the warmest, averaging a daily high of 29.2°C.
December is the wettest, averaging 180.1mm of rain across roughly 19 wet days.
December is the coolest month, with average daily highs around 8.1°C.