Beaverton, Oregon

Climate of Beaverton, Oregon

North America

Beaverton, Oregon, is a city located in the Tualatin Valley, part of the Portland metropolitan area in the Pacific Northwest. Known for its suburban character, proximity to Portland, and access to outdoor recreation, Beaverton experiences a climate influenced by its coastal location and the surrounding geography. To gain a comprehensive understanding of the weather and climate of Beaverton, it’s essential to explore its seasonal variations, precipitation patterns, temperature ranges, and the influence of its geographical location.

Geography and Location:

According to Citiesplustowns, Beaverton is situated in Washington County, Oregon, approximately seven miles west of downtown Portland. The city is part of the Tualatin Valley, nestled between the Tualatin Mountains to the west and the Willamette River to the east. Its location in the Pacific Northwest provides residents with easy access to both urban amenities and natural landscapes.

Climate Classification:

Beaverton falls under the classification of a marine west coast climate, also known as a temperate maritime climate. This climate type is characterized by mild temperatures, relatively wet conditions, and minimal temperature extremes. The influence of the Pacific Ocean moderates temperature variations, contributing to the region’s overall temperate climate.


  1. Winter:

Winters in Beaverton, from December to February, are characterized by mild temperatures. Average daytime temperatures range from the 40s to 50s°F (around 4–15°C). While frost can occur, snowfall is infrequent, and the city typically experiences only light accumulations, if any. Winter is the wettest season, with a higher frequency of rainfall.

  1. Spring:

Spring in Beaverton, from March to May, marks a transition to milder and drier conditions. Average temperatures gradually increase, with highs ranging from the 50s to 60s°F (around 10–21°C) in March to the 60s and 70s°F (15–26°C) in May. Spring is a vibrant season, with blooming flowers and trees creating a colorful landscape.

  1. Summer:

Beaverton’s summers, from June to August, are characterized by warm and dry conditions. Average daytime temperatures often range from the 70s to 80s°F (21–32°C), providing a pleasant and comfortable summer climate. While temperatures can occasionally reach into the 90s°F (32–37°C), the coastal influence helps prevent prolonged periods of extreme heat.

  1. Autumn:

Fall in Beaverton, spanning from September to November, sees a gradual cooling of temperatures. Average highs range from the 60s and 70s°F (15–26°C) in September to the 50s°F (around 10°C) in November. Fall foliage becomes a prominent feature, and the season is generally characterized by cooler but still mild weather.


Beaverton receives a significant amount of precipitation, with an average annual rainfall of about 38 inches (965 mm). Precipitation is relatively evenly distributed throughout the year, with a slight increase during the winter months. Rainfall is often light to moderate, contributing to the lush greenery of the region. Additionally, the city may experience occasional drizzle or light rain.

Influence of the Pacific Ocean:

The Pacific Ocean’s proximity plays a crucial role in shaping Beaverton’s climate. The ocean moderates temperature extremes, resulting in mild winters and relatively cool summers. The marine influence also contributes to the region’s frequent cloud cover and the potential for precipitation throughout the year. While the Pacific Ocean brings moisture, the coastal mountains to the west help shield Beaverton from the more intense storms common along the coast.


Beaverton may exhibit microclimates within its boundaries due to variations in elevation, local topography, and urban development. Areas with different elevations or proximity to water bodies, such as the Tualatin River to the south, may experience slightly different temperature and humidity levels compared to other parts of the city. These microclimatic variations contribute to the diversity of experiences within Beaverton.

Urban Heat Island Effect:

The urban areas within Beaverton, particularly around commercial centers and densely populated neighborhoods, may experience the urban heat island effect. Urban heat islands occur when buildings and pavement absorb and retain heat, leading to higher temperatures compared to surrounding rural areas. However, this effect is generally less pronounced than in more densely populated urban areas.

Recreational Opportunities:

Beaverton, surrounded by the natural beauty of the Pacific Northwest, offers residents and visitors numerous recreational opportunities. The Tualatin Hills Nature Park, with its trails and wildlife, provides a natural escape within the city. Additionally, the city’s parks and green spaces offer opportunities for outdoor activities such as hiking, biking, and picnicking.

Climate Change Considerations:

Beaverton, like many communities worldwide, faces considerations related to climate change. Changes in temperature, precipitation patterns, and the potential for more extreme weather events are areas of concern. The city may be engaged in climate resilience planning, focusing on sustainable practices, green infrastructure, and community initiatives to address these challenges.


Beaverton, Oregon, experiences a marine west coast climate characterized by its mild temperatures, relatively wet conditions, and the influence of the Pacific Ocean. With a mix of suburban landscapes, proximity to natural amenities, and a temperate climate, residents and visitors can enjoy a diverse range of experiences throughout the year. The city’s commitment to green spaces and outdoor recreation contributes to the high quality of life in Beaverton. As the city continues to evolve, climate considerations will likely play a crucial role in shaping sustainable practices and ensuring the well-being of its residents.

Beaverton, Oregon