Climate and monthly weather forecast
Eugene, OR

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Bright neon lights light up the colorful city of Eugene in Oregon,
Bright neon lights light up the colorful city of Eugene in Oregon,

The climate of Eugene

Eugene, Oregon, nestled on the Willamette River, thrives within the Mediterranean climate zone, characterized by its warm summers and attributable to the Köppen climate classification Csb. The prevailing climate supports a diverse array of flora and fauna.

Over the course of twelve months, average high temperatures range from 46.2°F (7.9°C) in deepest winter to a warm 80.1 to 81.3°F (27.4°C) in mid-summer. The sharp contrast between winter lows of 33.8°F (1°C) and summer highs illustrates the dynamic and often unpredictable weather in this region. The shift in average low temperatures follows a similar pattern, bottoming out at a chilly 33.8°F (1°C) in winter before ascending to a cool 49.6°F (9.8°C) in summer.

Precipitation varies throughout the year, with a conspicuous dry period from June through August, where monthly averages dip to a mere 0.08 to 0.16" (4mm). This is in stark contrast to the rest of the year, particularly from October to March, when the area sees consistent and ample rainfall, notably peaking in December at 1.54" (39mm).

Despite the variations in temperature and rainfall, relative humidity remains relatively stable year-round, hovering between 68% in the dry summer months and 86% at other times.

The best time to visit Eugene

The optimum time to visit Eugene extends from June to September. In this period, temperatures lie between 65.8°F (18.8°C) to a warm 81.3°F (27.4°C), coupled with minimal rainfall. This span of months witnesses the maximum daily sunshine, spanning 9 to 10.9 hours, fostering optimum conditions for outdoor activities. UV index levels rise to an average of 5 to 6, so sunscreen and protective clothing are recommended for anyone spending extended periods outside during this phase of the year.

The worst time to visit Eugene

Those adverse to colder climates might want to avoid Eugene between December and February. The winter months here are characterized by lower temperatures, from 33.8°F (1°C) rising to no more than 49.6°F (9.8°C), with relative humidity lingering around 86%. These months also bear witness to the heaviest rainfall of the year, which goes up to 1.54" (39mm) in December. Sunshine averages just 4.2 to 4.3 hours a day, which is noticeably less than the rest of the year.

Spring weather in Eugene

Spring introduces a warming trend in Eugene with average high temperatures ascending from 53.2°F (11.8°C) in March to 65.8°F (18.8°C) by May. Rainfall during the spring months oscillates between 1.1" (28mm) to 0.75" (19mm), a significant decrease compared to the winter months. The length of daylight extends to 13.5 to 14.8 hours, while daily sunshine averages jump from 5.4 to 8.2 hours.

Summer weather in Eugene

The summer season in Eugene is dominated by pleasant temperatures ranging from 65.8°F (18.8°C) in June soaring up to 81.3°F (27.4°C) in August. Rainfall is at its lowest in summer, with an average of just 0.08" (2mm) in July, making these days notably drier than the rest of the year. Sunshine dominates, with an average of 10.9 to 11 hours daily, while daylight hours peak at around 15.1 to 15.4 hours.

Autumn weather in Eugene

Autumn in Eugene showcases a drop in temperatures from a high of 73.9°F (23.3°C) in September to a cooler 52.7°F (11.5°C) by November. Rainfall increases during the autumn months, from a mere 0.51" (13mm) in September to 1.1" (28mm) towards November. Sunshine hours are reduced to 9.2 to 5.4 hours per day, signalling the approach of winter.

Winter weather in Eugene

Winter months are the coldest in Eugene with average low temperatures dropping to 33.8°F (1°C) in December and average highs around 49.6°F (9.8°C) in February. Precipitation levels are significantly higher during the winter, peaking at 1.54" (39mm) in December. Daylight hours are reduced to their yearly low of 8.9 to 9.6 hours, while sunshine averages dwindle down to 4.2 to 4.3 hours per day.

Weather in January

The weather in January in Eugene, Oregon is characterized by chilly temperatures and high levels of humidity, signs of a true winter month. Despite the frosty temperatures, Eugene experiences mild snowfall with just 0.39" (10mm) on an average. Weather in January »

Weather in February

February continues the winter trend seen in January, but with slightly warmer temperatures and an increase in snowfall to 1.5" (38mm). The change attributed to climate transition is most noticeable in the lengthening daylight hours, indicative of the approaching spring. Weather in February »

Weather in March

The arrival of March signals the start of spring in Eugene, with a small increase in temperature and longer daylight hours compared to February. Despite the transition into spring, rainfall continues to be a marked feature of Eugene's weather, with precipitation registered on 13.3 days of the month. Weather in March »

Weather in April

April in Eugene confirms the arrival of spring, with noticeably warmer temperatures than its predecessor, March. The city witnesses a decline in rainfall, marking the progression towards drier months. An increase in sunshine to 6.7 hours signifies more clear skies, which translates to improved visibility over March. Weather in April »

Weather in May

May's weather in Eugene deviates from the trend observed in earlier months, with temperatures peaking to 65.8°F (18.8°C). Rainfall decreases markedly to 0.75" (19mm), painting a picture of clear skies and a reduction in humidity levels. Weather in May »

Weather in June

June in Eugene marks the official onset of summer, bringing drier and sunnier weather conditions than May. There is a noticeable decrease in rainfall, from 0.75" (19mm) in May to 0.43" (11mm) this month, indicating a shift towards parched weather patterns. Weather in June »

Weather in July

July in Eugene witnesses the peak of summer with highs reaching a tipping point of 80.1°F (26.7°C), making it the warmest month of the year. Despite the elevated temperatures, rainfall hits its lowest point at 0.08" (2mm), reinforcing July's reputation as the driest month. Weather in July »

Weather in August

August continues the prevailing summer trend with high-reaching temperatures similar to July. However, this month brings a slight increase in rainfall, marking the end of Eugene's driest period. Nonetheless, the city remains sun-drenched with up to 11 hours of sunshine and the same extended daylight hours as observed in July. Weather in August »

Weather in September

The weather in September in Eugene starts to tilt towards fall, bringing a mild drop in temperatures compared to its preceding summer months. The rainfall increases to 0.51" (13mm), signaling a break from the summer dry spell. Weather in September »

Weather in October

October in Eugene brings in the full spirit of fall with noticeably cooler temperatures and heavier rainfall of 0.75" (19mm) compared to September. The city prepares for the winter ahead, with daylight hours dwindling further to 11 hours, and a significant reduction in sunshine duration. Weather in October »

Weather in November

November in Eugene signals the advent of winter, with temperatures dropping and rainfall increasing to 1.1" (28mm). Although the sun's presence decreases to only 4.6 hours per day, the relative humidity rises to 85%, indicating the city's shift into much cooler and wetter conditions. Weather in November »

Weather in December

December in Eugene marks the full-fledged start of winter, presenting the city with the lowest temperatures and the longest nights of the year. The weather pattern mirrors that of January with an increase in rainfall to 1.54" (39mm), the highest yearly, and a return of snowfall. Weather in December »
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Frequently asked questions

What are the most humid months in Eugene?

January through March and December, with an average relative humidity of 86%, are most humid months in Eugene, Oregon.

How much does it rain in Eugene?

Throughout the year, there are 109.9 rainfall days, and 10.08" (256mm) of precipitation is accumulated.

When does it snow in Eugene?

January through March and December are months with snowfall in Eugene, Oregon.

How many days does it snow in Eugene?

In Eugene, Oregon, during the entire year, snow falls for 5 days and aggregates up to 2.36" (60mm) of snow.

When is the lowest UV index in Eugene?

January, February, November and December, with an average maximum UV index of 2, are months with the lowest UV index.

When does it snow the most in Eugene?

February is the month with the most snowfall in Eugene, Oregon. Snow falls for 2.3 days and accumulates 1.5" (38mm) of snow.

What is the month with the least sunshine in Eugene?

The month with the least sunshine is February, with an average of 4.1h of sunshine.

When is Daylight Saving Time (DST) in Eugene?

On Sunday, March 10. 2024, at 2:00 am, Daylight Saving Time starts, and the time zone changes from PST to PDT. Daylight Saving Time ends Sunday, November 3. 2024, at 2:00 am, and the time zone reverts from PDT to PST.

When it does not snow in Eugene?

In Eugene, Oregon, snow does not fall in April through November.

When are the longest days in Eugene?

The month with the longest days is June, with an average of 15h and 24min of daylight.

What is the driest month in Eugene?

The month with the least rainfall in Eugene is July, when the rain falls for 2.6 days and typically collects 0.08" (2mm) of precipitation.

What is the month with the highest UV index in Eugene?

July is the month with the highest UV index, with an average maximum UV index of 6.

What time of the year is the hottest in Eugene?

August is the month that records the highest temperatures in Eugene, Oregon, with averages ranging from a high of 81.3°F (27.4°C) to a low of 49.6°F (9.8°C).

What is the least humid month in Eugene?

With an average relative humidity of 68%, August is the least humid month.

What month has the most sunshine in Eugene?

With an average of 11h of sunshine, August has the most sunshine of the year.

What part of the year is the coldest in Eugene?

The coldest period in Eugene is December, when temperatures fluctuate between an average high of 46.2°F (7.9°C) and a low of 33.8°F (1°C).

What is the wettest month in Eugene?

The month with the most rainfall is December, when the rain falls for 13.4 days and typically aggregates up to 1.54" (39mm) of precipitation.

What is the month with the shortest days in Eugene?

The month with the shortest days is December, with an average of 9h and 0min of daylight.

Average temperature
Eugene, OR

Average temperature - Eugene, OR

The warmest month (with the highest average high temperature) is August (81.3°F).
The month with the lowest average high temperature is December (46.2°F).

The month with the highest average low temperature is August (49.6°F).
The coldest month (with the lowest average low temperature) is December (33.8°F).

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Average pressure
Eugene, OR

Average pressure - Eugene, OR

The month with the highest atmospheric pressure is January (30.12"Hg).
The months with the lowest atmospheric pressure are August and September (30.01"Hg).

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Average wind speed
Eugene, OR

Average wind speed - Eugene, OR

The windiest months (with the highest average wind speed) are January and March (4.5mph).
The calmest months (with the lowest average wind speed) are August and September (3.6mph).

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Average humidity
Eugene, OR

Average humidity - Eugene, OR

The months with the highest relative humidity are January, February, March and December (86%).
The month with the lowest relative humidity is August (68%).

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Average rainfall
Eugene, OR

Average rainfall - Eugene, OR

The wettest month (with the highest rainfall) is December (1.54").
The driest month (with the least rainfall) is July (0.08").

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Average rainfall days
Eugene, OR

Average rainfall days - Eugene, OR

The month with the highest number of rainy days is December (13.4 days).
The month with the least rainy days is August (2.5 days).

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Average snowfall
Eugene, OR

Average snowfall - Eugene, OR

The month with the highest snowfall is February (1.5").
The months with the least snowfall are April, May, June, July, August, September, October and November (0").

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Average snowfall days
Eugene, OR

Average snowfall days - Eugene, OR

The month with the highest number of snowfall days is February (2.3 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).

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Average daylight / Average sunshine
Eugene, OR

Average daylight / Average sunshine - Eugene, OR

The month with the longest days is June (Average daylight: 15h and 24min).
The month with the shortest days is December (Average daylight: 9h and 0min).

The month with the most sunshine is August (Average sunshine: 11h and 0min).
The month with the least sunshine is February (Average sunshine: 4h and 6min).

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Average sunshine days
Eugene, OR

Average sunshine days - Eugene, OR

The month with the most sunshine days is August (27.3 days).
The month with the least sunshine days is February (14.3 days).

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Average visibility
Eugene, OR

Average visibility - Eugene, OR

The months with the highest visibility are June, July, August, September and October (5mi).
The months with the lowest visibility are January, February, March, April, May, November and December (4mi).

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Eugene, Oregon, USA

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