Climate and monthly weather forecast
Beaverton, OR

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Colored yellow, brown and golden tree colors under a perfect blue, cloudy sky in the fall, mirrored in the calm lake water in Beaverton, Oregon
Colored yellow, brown and golden tree colors under a perfect blue, cloudy sky in the fall, mirrored in the calm lake water in Beaverton, Oregon

The climate of Beaverton

Situated in the lush state of Oregon, Beaverton's climate shares much in common with the greater Mediterranean region. According to the Köppen climate classification, Beaverton's weather falls under the category of 'Mediterranean, warm summer', otherwise known as 'Csb'.

Throughout the year, the temperature in Beaverton ranges from an average low of 34.7°F (1.5°C) in December to a high of 81.7°F (27.6°C) in August. The annual weather displays a pattern of cool, damp winters and dry, warm summers. Humidity levels show a similar trend, ranging from a low of 63% in August to a high of 84% during the wintry months of January and December.

Rainfall follows a corresponding pattern with the most precipitation recorded in December with 4.61" (117mm), contrasted by the dry summer months from June to September when rainfall drops noticeably to as low as 0.31" (8mm) in July. Snowfall is minor but present during the colder months from January to March and again in December, peaking at 1.61" (41mm) in February.

One distinctive aspect of Beaverton's weather is the consistent average daylight hours, only slightly dropping from 15.6 hours in June to 8.8 hours in December. Sunshine hours show more deviation, with the longest duration recorded at 10.9 hours in August and the shortest at 3.9 hours in February.

The best time to visit Beaverton

The most attractive period for tourists to visit Beaverton would arguably be during the summer months, from June to September. The climate during this period is characterized by warm temperatures, ranging between 72.5°F (22.5°C) to 81.7°F (27.6°C), low humidity levels, and minimal rainfall. The region sees an average of 15.6 to 10.5 hours of daylight, paired with long sunshine durations from 9.3 to 10.9 hours, offering plenty of opportunities for outdoor activities. On top of this, the UV index during this time is at its highest, peaking at 6 in July, making it perfect for those seeking a healthy summer glow.

The worst time to visit Beaverton

Contrarily, the least favorable time to visit Beaverton, especially for tourists who want to avoid gloomy weather, would be between January and March. The weather during this period leans towards low temperatures from 35.1°F (1.7°C) to 38.1°F (3.4°C) and high humidity levels, reaching 83% in January. The average rainfall in these months escalates, peaking at 4.49" (114mm) in January. Additionally, snowfall makes an appearance and daylight and sunshine hours are at their lowest.

Spring weather in Beaverton

Spring in Beaverton rolls in from March to May. During this period, temperatures gradually rise from a pleasant 52.7°F (11.5°C) to a warm 67.6°F (19.8°C). Spring also sees a decrease in rainfall, falling from an average of 3.43" (87mm) in March to 1.69" (43mm) in May, signaling the end of the wet period.

Summer weather in Beaverton

Summer in Beaverton spans from June to August. This period is characterized by warm temperatures between 72.5°F (22.5°C) and 81.7°F (27.6°C). Local inhabitants and tourists can enjoy dry weather with rainfall less than 1.18" (30mm), and long, sun-filled days with sunshine hours peaking at 10.9 hours in August.

Autumn weather in Beaverton

Autumn introduces itself from September to November. Temperatures drop slowly from 74.3°F (23.5°C) in September to a cooler 50.9°F (10.5°C) in November. Rainfall begins to increase again in this period, particularly in November with 3.43" (87mm). Sunshine hours reduce, but offer enough daylight for enjoyable outdoor activities.

Winter weather in Beaverton

Winter chills Beaverton between December and February. Temperatures frequently dip between 35.1°F (1.7°C) to 35.4°F (1.9°C) in these months. Rainfall is at its peak during this season, along with the humidity level. On the bright side, the city dresses up in a snowy blanket with average snowfall recorded from 0.63" (16mm) to 1.61" (41mm), offering a picturesque view for those who appreciate winter aesthetics.

Weather in January

January in Beaverton, Oregon, tends to be a damp start to the year with cool temperatures and high humidity. Notably, the coldest minimum temperature of 35.1°F (1.7°C) occurs this month along with a sizable precipitation of 4.49" (114mm). Weather in January »

Weather in February

Come February, Beaverton experiences a small rebound in its winter blues. There is a slight increase in daily temperature, a bit higher than January’s. That said, the recorded snowfall increases to 1.61" (41mm), painting a white canvas intermittently. Weather in February »

Weather in March

Beaverton greets spring in March, as the temperatures begin to warm up and the landscape slowly sheds its winter hues. This month is known to bring in the maximum number of rainy days, with about 20.6 on average. It's a month of abundance, as the city witnesses an augmentation in hours of daylight, stronger winds and an increase in pressure. Weather in March »

Weather in April

April ends Beaverton’s snowy period, thus transitioning to shower dominant weather. It brings with it an increase in daily sunshine, up to 7.4 hours, and warming temperatures. The rainfall, though still significant, shows the first signs of reduction. Weather in April »

Weather in May

By May, Beaverton sinks into the essence of spring with even warmer temperatures. Rainfall plummets to 1.69" (43mm), the first notable decrease since the start of the year, making it the driest month yet. It’s the beginning of a dry spell as the frequency of rainy days reduces significantly. Weather in May »

Weather in June

June sees Beaverton embrace the summer with an increase in temperatures, reaching up to 72.5°F (22.5°C). The city experiences an additional drop in rainfall, bringing precipitation down to 1.18" (30mm). The lighter dampness allows for flourishing vegetation around the metropolis. Weather in June »

Weather in July

July is the month of extremes, with Beaverton reaching its hottest temperature of the year at 81.7°F (27.6°C), and the lowest relative humidity, a mere 64%. This month also witnesses the highest UV Index, making it vital for residents to protect their skin. Weather in July »

Weather in August

August continues the summer saga with warm temperatures and the least rainfall of 0.35" (9mm) for the year. The city landscape thrives under 10.9 hours of daily sunshine intoxicating the environment with vibrancy. Evenings offer a pleasant contrast with low temperature, creating a perfect balance in nature. Weather in August »

Weather in September

The transitional month of September slows down the pace of summer and inches towards autumn. The dry spell finally ends with a significant increase in precipitation to 1.54" (39mm). Warmer temperatures persist, but with a trend of gradual cooling. Weather in September »

Weather in October

October in Beaverton brings in the full splendor of fall with cooler temperatures and increased rainfall. The climate sees an upsurge to 3.31" (84mm) of rain, marking the onset of frequent showers. As the city pulls away from summer, a substantial reduction in daily sunshine hours is observed. Weather in October »

Weather in November

As November arrives, Beaverton gears up for the onset of winter. Keeping with the trend, this month witnesses a further decrease in temperature, dropping to a low of 39.9°F (4.4°C). The hint of winter is tangible, with a notable increase in both rainfall and cloud cover. Weather in November »

Weather in December

December announces the arrival of winter with a significant drop in average temperatures, down to 34.7°F (1.5°C). The city experiences the highest precipitation of the year, at 4.61" (117mm), carrying a hint of snow. The long nights curtailing daylight to a mere 8.8 hours, matched with 58% cloud cover, adds to the winter ambiance. Weather in December »

Frequently asked questions

How many days does it rain?

In Beaverton, during the entire year, the rain falls for 173.2 days and collects up to 30.55" (776mm) of precipitation.

When does it snow in Beaverton?

January through March, November and December are months with snowfall.

How many days does it snow?

Throughout the year, there are 6.1 snowfall days, and 4.37" (111mm) of snow is accumulated.

What are the months with the lowest UV index?

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

What is the most humid month?

The months with the highest humidity are February and December, with an average relative humidity of 84%.

When does it snow the most?

The month with the most snowfall is February, when snow falls for 2.2 days and typically aggregates up to 1.61" (41mm) of snow.

What is the month with the least sunshine?

February has the least sunshine of the year, with an average of 3.9h of sunshine.

When is Daylight Saving Time (DST) in Beaverton?

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?

April through October are months without snowfall.

When are the longest days?

June has the longest days of the year, with an average of 15h and 36min of daylight.

What is the driest month?

July is the month with the least rainfall. Rain falls for 4.7 days and accumulates 0.31" (8mm) of precipitation.

When is the highest UV index?

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

What is the warmest month?

The highest temperatures are recorded in August, with averages reaching a high of 81.7°F (27.6°C) and a low of 55.6°F (13.1°C).

What is the least humid month in Beaverton?

August is the least humid month, with an average relative humidity of 63%.

What month has the most sunshine?

August has the most sunshine of the year, with an average of 10.9h of sunshine.

What are the coldest months?

With average high and low temperatures of 44.2°F (6.8°C) and 34.7°F (1.5°C) respectively, December is Beaverton's coldest month.

What is the rainiest month?

December is the month with the most rainfall. Rain falls for 18.7 days and accumulates 4.61" (117mm) of precipitation.

What is the month with the shortest days?

December has the shortest days of the year, with an average of 8h and 48min of daylight.

Average temperature
Beaverton, OR

Average temperature - Beaverton, OR

The warmest month (with the highest average high temperature) is August (81.7°F).
The month with the lowest average high temperature is December (44.2°F).

The month with the highest average low temperature is August (55.6°F).
The coldest month (with the lowest average low temperature) is December (34.7°F).

Average pressure
Beaverton, OR

Average pressure - Beaverton, OR

The month with the highest atmospheric pressure is January (30.11"Hg).
The months with the lowest atmospheric pressure are August and September (30.01"Hg).

Average wind speed
Beaverton, OR

Average wind speed - Beaverton, OR

The windiest month (with the highest average wind speed) is January (5.4mph).
The calmest month (with the lowest average wind speed) is August (4mph).

Average humidity
Beaverton, OR

Average humidity - Beaverton, OR

The months with the highest relative humidity are February and December (84%).
The month with the lowest relative humidity is August (63%).

Average rainfall
Beaverton, OR

Average rainfall - Beaverton, OR

The wettest month (with the highest rainfall) is December (4.61").
The driest month (with the least rainfall) is July (0.31").

Average rainfall days
Beaverton, OR

Average rainfall days - Beaverton, OR

The month with the highest number of rainy days is March (20.6 days).
The month with the least rainy days is August (4.6 days).

Average snowfall
Beaverton, OR

Average snowfall - Beaverton, OR

The month with the highest snowfall is February (1.61").
The months with the least snowfall are April, May, June, July, August, September and October (0").

Average snowfall days
Beaverton, OR

Average snowfall days - Beaverton, OR

The month with the highest number of snowfall days is February (2.2 days).
The months with the least snowfall days are April, May, June, July, August, September and October (0 days).

Average daylight / Average sunshine
Beaverton, OR

Average daylight / Average sunshine - Beaverton, OR

The month with the longest days is June (Average daylight: 15h and 36min).
The month with the shortest days is December (Average daylight: 8h and 48min).

The month with the most sunshine is August (Average sunshine: 10h and 54min).
The month with the least sunshine is February (Average sunshine: 3h and 54min).

Average sunshine days
Beaverton, OR

Average sunshine days - Beaverton, OR

The month with the most sunshine days is July (24.9 days).
The month with the least sunshine days is March (8.6 days).

Average UV index
Beaverton, OR

Average UV index - Beaverton, OR

The month with the highest UV index is July (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 2).

Average visibility
Beaverton, OR

Average visibility - Beaverton, OR

The months with the highest visibility are July, August and September (6mi).
The months with the lowest visibility are January, February, March, April, May, June, October, November and December (5mi).

Beaverton, Oregon, USA

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