Arlington, Washington, is a charming city located in Snohomish County, located in the northwestern region of the United States. Situated at the foothills of the Cascade Range, Arlington boasts a beautiful setting surrounded by lush forests, rolling hills, and scenic rivers. With a population of approximately 20,000 residents, Arlington offers a perfect blend of small-town charm and modern amenities. The city is known for its vibrant community events, outdoor recreational opportunities, and proximity to stunning natural attractions such as the North Cascades National Park and the Puget Sound. Major landmarks in Arlington include the Arlington Municipal Airport, Legion Memorial Golf Course, and the Stillaguamish Valley Pioneer Museum. Whether you’re exploring the great outdoors, attending local festivals, or simply enjoying the tranquility of small-town life, Arlington has something to offer for everyone.
Climate and Weather Overview
Arlington, Washington, experiences a temperate marine climate influenced by its proximity to the Pacific Ocean and the Cascade Mountains. The city enjoys mild temperatures, abundant rainfall, and moderate humidity throughout the year. Below is a detailed overview of Arlington’s climate and weather, including average temperature, precipitation, and sunny days for each month.
Average Monthly Climate Data
| Month | Average Temperature (°F) | Precipitation (inches) | Sunny Days |
| January | 42 | 5.17 | 11 |
| February | 45 | 3.60 | 13 |
| March | 49 | 3.90 | 13 |
| April | 54 | 2.91 | 15 |
| May | 60 | 2.15 | 18 |
| June | 65 | 1.65 | 20 |
| July | 70 | 0.97 | 23 |
| August | 70 | 1.17 | 23 |
| September | 66 | 1.88 | 19 |
| October | 57 | 3.42 | 15 |
| November | 48 | 6.40 | 10 |
| December | 42 | 5.78 | 10 |
Weather by Month
January
January in Arlington is characterized by cool temperatures and frequent rainfall. The average temperature hovers around 42°F (5.6°C), with precipitation averaging 5.17 inches. Outdoor activities during this month may be limited due to the wet and chilly weather, but indoor attractions such as museums and art galleries offer opportunities for exploration.
Recommended Activities: Indoor activities such as visiting museums and art galleries, attending local theater productions, enjoying cozy evenings by the fireplace.
February
February brings similar weather conditions to January, with cool temperatures and moderate rainfall. The average temperature increases slightly to around 45°F (7.2°C), while precipitation decreases to 3.60 inches. Despite the wet weather, outdoor enthusiasts can still enjoy activities such as hiking and birdwatching in between rain showers.
Recommended Activities: Hiking in rainforest trails, birdwatching in local parks, attending community events and festivals.
March
March marks the beginning of spring in Arlington, with milder temperatures and longer daylight hours. The average temperature rises to around 49°F (9.4°C), while precipitation remains moderate at 3.90 inches. Outdoor activities such as hiking, biking, and wildlife viewing become more popular as residents and visitors embrace the arrival of spring.
Recommended Activities: Hiking in local nature reserves, biking along scenic trails, wildlife viewing in designated areas.
April
April brings pleasant weather to Arlington, with warmer temperatures and decreasing rainfall. The average temperature increases to around 54°F (12.2°C), while precipitation decreases to 2.91 inches. Outdoor activities such as gardening, picnicking, and exploring local parks are popular as residents and visitors enjoy the blooming flowers and budding trees.
Recommended Activities: Gardening and planting flowers, picnicking in local parks, exploring botanical gardens.
May
May is a delightful time to visit Arlington, with mild temperatures and plenty of sunshine. The average temperature rises to around 60°F (15.6°C), while precipitation further decreases to 2.15 inches. Outdoor activities such as hiking, camping, and fishing are popular as residents and visitors take advantage of the pleasant weather and outdoor recreation opportunities.
Recommended Activities: Hiking in nearby national parks, camping in designated campgrounds, fishing in local rivers and lakes.
June
June brings warm and sunny weather to Arlington, making it an ideal time for outdoor adventures. The average temperature increases to around 65°F (18.3°C), while precipitation decreases to 1.65 inches. Outdoor activities such as kayaking, paddleboarding, and swimming are popular as residents and visitors cool off in nearby rivers and lakes.
Recommended Activities: Kayaking or paddleboarding on local waterways, swimming in designated swimming areas, enjoying outdoor picnics and barbecues.
July
July is the warmest month in Arlington, with pleasant temperatures and minimal rainfall. The average temperature peaks at around 70°F (21.1°C), while precipitation drops to 0.97 inches. Outdoor activities such as hiking, biking, and camping are popular as residents and visitors explore the scenic beauty of the region.
Recommended Activities: Hiking to scenic viewpoints, biking along mountain trails, camping under the stars.
August
August brings continued warm and sunny weather to Arlington, making it an ideal time for outdoor adventures. The average temperature remains at around 70°F (21.1°C), while precipitation slightly increases to 1.17 inches. Outdoor activities such as fishing, boating, and birdwatching are popular as residents and visitors enjoy the last days of summer.
Recommended Activities: Fishing in local rivers and lakes, boating on nearby waterways, birdwatching in wetland areas.
September
September marks the transition to fall in Arlington, with cooler temperatures and changing foliage. The average temperature drops to around 66°F (18.9°C), while precipitation increases to 1.88 inches. Outdoor activities such as leaf-peeping, hiking, and apple picking are popular as residents and visitors enjoy the vibrant colors of the season.
Recommended Activities: Leaf-peeping along scenic drives, hiking in national parks and forests, apple picking at local orchards.
October
October brings cooler temperatures and colorful foliage to Arlington, making it a popular time for outdoor activities. The average temperature drops to around 57°F (13.9°C), while precipitation increases to 3.42 inches. Outdoor activities such as pumpkin patches, corn mazes, and haunted houses are popular as residents and visitors embrace the festive spirit of the season.
Recommended Activities: Visiting pumpkin patches and corn mazes, exploring haunted houses and spooky attractions, enjoying fall festivals and events.
November
November is a transitional month in Arlington, with cooler temperatures and occasional rainfall. The average temperature drops to around 48°F (8.9°C), while precipitation increases to 6.40 inches. Despite the cooler weather, there are still plenty of outdoor activities to enjoy, including hiking, birdwatching, and exploring scenic drives.
Recommended Activities: Hiking in local parks and trails, birdwatching in designated areas, exploring scenic drives and overlooks.
December
December brings cold temperatures and occasional snowfall to Arlington, making it a festive time to visit the area. The average temperature drops to around 42°F (5.6°C), while precipitation increases to 5.78 inches. Despite the cold weather, there are still plenty of holiday events and activities to enjoy, including festive parades, holiday markets, and seasonal decorations.
Recommended Activities: Enjoying holiday events and festivals, shopping for unique gifts, snowshoeing or cross-country skiing in nearby mountains.