Climate - Eugene (Oregon)
Average weather, temperature, rainfall, sunshine hours
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Climate chart - Eugene (Oregon)
The climate of Eugene can be defined as oceanic with Mediterranean influences. In fact, winter is mild enough, but not as in the Mediterranean climate, and rainfall is frequent for many months a year, but summer is hot and sunny, albeit with cool nights.
The city is located 80 km (50 mi) away from the Pacific coast, in the southernmost part of the Willamette Valley, the plain between the Oregon coastal chain and the Cascade chain.
In winter, fog can form at night and in the early morning. On the coldest nights of the year, the temperature generally drops to -7/-8 °C (18/19 °F), but sometimes it can also drop below. The coldest record is -24 °C (-11.2 °F) and was set in December 1972.
Sometimes it can snow, although heavy snowfalls are rare. On average, 12 cm (4.8 in) of snow fall per year.
In summer, there are strong temperature variations between night and day. On the hottest days of the year, the temperature usually reaches 37/38 °C (99/100 °F). In August 1981, it reached 42 °C (108 °F). At the end of June 2021, during an exceptional heat wave, the temperature reached 44 °C (111 °F).
The average temperature of the coldest month (December) is of 4.8 °C (40.6 °F), that of the warmest month (August) is of 19.9 °C (67.9 °F). Here are the average temperatures.
Eugene - Average temperatures (1991-2020) | Month | Min (°C) | Max (°C) | Mean (°C) | Min (°F) | Max (°F) | Mean (°F) |
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| January | 1.5 | 8.9 | 5.2 | 35 | 48 | 41.4 |
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| February | 1.7 | 10.8 | 6.2 | 35 | 51 | 43.2 |
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| March | 2.9 | 13.7 | 8.3 | 37 | 57 | 46.9 |
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| April | 4.4 | 16.3 | 10.4 | 40 | 61 | 50.6 |
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| May | 6.7 | 20.1 | 13.4 | 44 | 68 | 56.1 |
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| June | 8.7 | 23.4 | 16.1 | 48 | 74 | 60.9 |
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| July | 10.9 | 28.9 | 19.9 | 52 | 84 | 67.8 |
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| August | 10.8 | 29.1 | 19.9 | 51 | 84 | 67.9 |
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| September | 8.8 | 25.6 | 17.2 | 48 | 78 | 62.9 |
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| October | 5.4 | 18.3 | 11.9 | 42 | 65 | 53.3 |
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| November | 3.2 | 11.8 | 7.5 | 38 | 53 | 45.5 |
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| December | 1.3 | 8.2 | 4.8 | 34 | 47 | 40.6 |
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| Year | 5.5 | 18 | 11.75 | 42 | 64.3 | 53 |
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Precipitation amounts to 1,035 millimeters (40.8 inches) per year: so, it is at an intermediate level. It ranges from 10 mm (0.4 in) in the driest months (July, August) to 185 mm (7.3 in) in the wettest (December). Here is the average precipitation.
Eugene - Average precipitation| Month | Millimeters | Inches | Days |
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| January | 155 | 6.1 | 18 |
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| February | 120 | 4.7 | 16 |
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| March | 120 | 4.7 | 18 |
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| April | 85 | 3.3 | 16 |
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| May | 60 | 2.4 | 12 |
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| June | 30 | 1.2 | 8 |
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| July | 10 | 0.4 | 3 |
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| August | 10 | 0.4 | 3 |
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| September | 35 | 1.4 | 6 |
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| October | 80 | 3.1 | 12 |
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| November | 150 | 5.9 | 18 |
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| December | 185 | 7.3 | 19 |
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| Year | 1035 | 40.7 | 146 |
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On average, there are around 2,535 sunshine hours per year. Here are the average sunshine hours per day.
Eugene - Sunshine hours| Month | Average | Total |
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January | 4.5 | 135 | February | 4 | 115 | March | 5.5 | 165 | April | 6.5 | 200 | May | 8 | 255 | June | 9 | 270 | July | 11 | 340 | August | 11 | 340 | September | 9 | 275 | October | 5.5 | 165 | November | 4.5 | 140 | December | 4 | 130 | Year | 6.9 | 2535 |
Best Time
The best time in Eugene is from mid-May to late September. The driest and sunniest period is generally from mid-June to early September, but it can sometimes get very hot, especially in July and August. You can therefore go from mid-May to mid-June and in the month of September.
Back to the climate of Oregon.
Eugene - Weather by month
Based on the period 1991-2020
January is generally a quite cold month. The average temperature is of 5.2 °C (41 °F), with a minimum of 1.5 °C (34.7 °F) and a maximum of 8.9 °C (48.1 °F).
On the coldest nights of the month, the temperature usually drops to around -5.5 °C (22.5 °F). However, it dropped to -13.3 °C (8.1 °F) in January 1993.
On the warmest days of the month, the temperature usually reaches around 15.5 °C (60.5 °F). However, it reached 20 °C (68 °F) in January 2015.
Precipitation amounts to 155 mm (6.1 in), distributed over 18 days.
The day lasts on average 9 hours and 20 minutes.
There are on average 4.5 hours of sunshine per day. So, the sun shines 46% of the time.
The average humidity is 88%. Hence, the air is normally humid.
The average wind speed is 11 kph (7 mph).
February is generally a quite cold month. The average temperature is of 6.2 °C (43 °F), with a minimum of 1.7 °C (35 °F) and a maximum of 10.8 °C (51.5 °F).
On the coldest nights of the month, the temperature usually drops to around -4 °C (24.5 °F). However, it dropped to -8 °C (17.6 °F) in February 2006.
On the warmest days of the month, the temperature usually reaches around 17 °C (62.5 °F). However, it reached 22.2 °C (72 °F) in February 1995.
Precipitation amounts to 120 mm (4.7 in), distributed over 16 days.
The day lasts on average 10 hours and 30 minutes.
There are on average 4 hours of sunshine per day. So, the sun shines 39% of the time.
The average humidity is 84%. Hence, the air is normally humid.
The average wind speed is 11 kph (7 mph).
March is generally a quite mild month. The average temperature is of 8.3 °C (47 °F), with a minimum of 2.9 °C (37.2 °F) and a maximum of 13.7 °C (56.6 °F).
On the coldest nights, which normally occur at the beginning of the month, the temperature usually drops to around -2 °C (28 °F). However, it dropped to -5 °C (23 °F) in March 1993.
On the warmest days, which normally occur at the end of the month, the temperature usually reaches around 21 °C (69.5 °F). However, it reached 26 °C (78.8 °F) in March 2003.
Precipitation amounts to 120 mm (4.7 in), distributed over 18 days.
The day lasts on average 12 hours and 0 minutes.
There are on average 5.5 hours of sunshine per day. So, the sun shines 45% of the time.
The average humidity is 80%. Hence, the air is normally humid.
The average wind speed is 11 kph (7 mph).
April is generally a mild month. The average temperature is of 10.4 °C (51 °F), with a minimum of 4.4 °C (40 °F) and a maximum of 16.3 °C (61.3 °F).
On the coldest nights, which normally occur at the beginning of the month, the temperature usually drops to around -0.5 °C (31.5 °F). However, it dropped to -3.3 °C (26.1 °F) in April 2002.
On the warmest days, which normally occur at the end of the month, the temperature usually reaches around 24.5 °C (76 °F). However, it reached 28.9 °C (84 °F) in April 2008.
Precipitation amounts to 85 mm (3.3 in), distributed over 16 days.
The day lasts on average 13 hours and 30 minutes.
There are on average 6.5 hours of sunshine per day. So, the sun shines 50% of the time.
The average humidity is 76%. Hence, the air is normally humid.
The average wind speed is 11 kph (7 mph).
May is generally a mild month. However, there are remarkable differences between night and day. The average temperature is of 13.4 °C (56 °F), with a minimum of 6.7 °C (44 °F) and a maximum of 20.1 °C (68.1 °F).
On the coldest nights, which normally occur at the beginning of the month, the temperature usually drops to around 1.5 °C (34.5 °F). However, it dropped to -0.6 °C (30.9 °F) in May 1996.
On the warmest days, which normally occur at the end of the month, the temperature usually reaches around 28.5 °C (83.5 °F). However, it reached 35 °C (95 °F) in May 2008.
Precipitation amounts to 60 mm (2.4 in), distributed over 12 days.
The day lasts on average 14 hours and 50 minutes. So the days are long.
There are on average 8 hours of sunshine per day. So, the sun shines 55% of the time.
The average humidity is 73%. Hence, the air is normally humid.
The average wind speed is 10 kph (6 mph).
June is generally a very mild month. However, there are remarkable differences between night and day. The average temperature is of 16.1 °C (61 °F), with a minimum of 8.7 °C (47.6 °F) and a maximum of 23.4 °C (74.2 °F).
On the coldest nights, which normally occur at the beginning of the month, the temperature usually drops to around 3.5 °C (38.5 °F). However, it dropped to 0.6 °C (33.1 °F) in June 2001.
On the warmest days, which normally occur at the end of the month, the temperature usually reaches around 32 °C (90 °F). However, it reached 38.9 °C (102 °F) in June 1992.
Precipitation amounts to 30 mm (1.2 in), distributed over 8 days.
The day lasts on average 15 hours and 25 minutes. So the days are long. June 21, the summer solstice, is the longest day of the year in the Northern Hemisphere.
There are on average 9 hours of sunshine per day. So, the sun shines 58% of the time.
The average humidity is 68%.
The average wind speed is 11 kph (7 mph).
July is generally a warm month. However, there are remarkable differences between night and day. The average temperature is of 19.9 °C (68 °F), with a minimum of 10.9 °C (51.7 °F) and a maximum of 28.9 °C (84 °F).
On the coldest nights of the month, the temperature usually drops to around 7 °C (44 °F). However, it dropped to 3.3 °C (37.9 °F) in July 2018.
On the warmest days of the month, the temperature usually reaches around 36.5 °C (97.5 °F). However, it reached 41.1 °C (106 °F) in July 2009.
Precipitation amounts to 10 mm (0.4 in), distributed over 3 days.
The day lasts on average 15 hours and 5 minutes. So the days are long.
There are on average 11 hours of sunshine per day. So, the sun shines 72% of the time.
The average humidity is 59%.
The average wind speed is 12 kph (7 mph).
August, the warmest month of the year, is generally a warm month. However, there are remarkable differences between night and day. The average temperature is of 19.9 °C (68 °F), with a minimum of 10.8 °C (51.5 °F) and a maximum of 29.1 °C (84.3 °F).
On the coldest nights of the month, the temperature usually drops to around 6.5 °C (43.5 °F). However, it dropped to 3.3 °C (37.9 °F) in August 2008.
On the warmest days of the month, the temperature usually reaches around 36.5 °C (98 °F). However, it reached 40 °C (104 °F) in August 1992.
Precipitation amounts to 10 mm (0.4 in), distributed over 3 days.
The day lasts on average 13 hours and 55 minutes.
There are on average 11 hours of sunshine per day. So, the sun shines 79% of the time.
The average humidity is 58%.
The average wind speed is 11 kph (7 mph).
September is generally a very mild month. However, there are remarkable differences between night and day. The average temperature is of 17.2 °C (63 °F), with a minimum of 8.8 °C (47.8 °F) and a maximum of 25.6 °C (78 °F).
On the coldest nights, which normally occur at the end of the month, the temperature usually drops to around 3.5 °C (38.5 °F). However, it dropped to -0.6 °C (30.9 °F) in September 1999.
On the warmest days, which normally occur at the beginning of the month, the temperature usually reaches around 33.5 °C (92.5 °F). However, it reached 36.7 °C (98.1 °F) in September 2014.
Precipitation amounts to 35 mm (1.4 in), distributed over 6 days.
The day lasts on average 12 hours and 25 minutes.
There are on average 9 hours of sunshine per day. So, the sun shines 74% of the time.
The average humidity is 64%.
The average wind speed is 11 kph (7 mph).
October is generally a mild month. The average temperature is of 11.9 °C (53 °F), with a minimum of 5.4 °C (41.8 °F) and a maximum of 18.3 °C (64.9 °F).
On the coldest nights, which normally occur at the end of the month, the temperature usually drops to around -1.5 °C (29.5 °F). However, it dropped to -8.3 °C (17.1 °F) in October 2002.
On the warmest days, which normally occur at the beginning of the month, the temperature usually reaches around 26 °C (78.5 °F). However, it reached 31.1 °C (88 °F) in October 1991.
Precipitation amounts to 80 mm (3.1 in), distributed over 12 days.
The day lasts on average 10 hours and 55 minutes.
There are on average 5.5 hours of sunshine per day. So, the sun shines 49% of the time.
The average humidity is 77%. Hence, the air is normally humid.
The average wind speed is 10 kph (6 mph).
November is generally a quite mild month. The average temperature is of 7.5 °C (45 °F), with a minimum of 3.2 °C (37.7 °F) and a maximum of 11.8 °C (53.2 °F).
On the coldest nights, which normally occur at the end of the month, the temperature usually drops to around -4 °C (24.5 °F). However, it dropped to -9.4 °C (15.1 °F) in November 1993.
On the warmest days, which normally occur at the beginning of the month, the temperature usually reaches around 19 °C (66 °F). However, it reached 23.3 °C (73.9 °F) in November 2012.
Precipitation amounts to 150 mm (5.9 in), distributed over 18 days.
The day lasts on average 9 hours and 35 minutes.
There are on average 4.5 hours of sunshine per day. So, the sun shines 48% of the time.
The average humidity is 86%. Hence, the air is normally humid.
The average wind speed is 11 kph (7 mph).
December, the coldest month of the year, is generally a quite cold month. The average temperature is of 4.8 °C (41 °F), with a minimum of 1.3 °C (34.3 °F) and a maximum of 8.2 °C (46.8 °F).
On the coldest nights of the month, the temperature usually drops to around -5.5 °C (21.5 °F). However, it dropped to -23.3 °C (-9.9 °F) in December 2013.
On the warmest days of the month, the temperature usually reaches around 15 °C (59 °F). However, it reached 17.8 °C (64 °F) in December 1993.
Precipitation amounts to 185 mm (7.3 in), distributed over 19 days.
The day lasts on average 8 hours and 55 minutes. December 21, the winter solstice, is the shortest day of the year in the Northern Hemisphere.
There are on average 4 hours of sunshine per day. So, the sun shines 47% of the time.
The average humidity is 88%. Hence, the air is normally humid.
The average wind speed is 11 kph (7 mph).
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