Federal Way Climate & Monthly Temperature Overview – United States

Summer in Federal Way

Summer in Federal Way is typically warm and dry, with average temperatures ranging from 55°F (13°C) to 75°F (24°C). July and August are the warmest months, with average highs reaching 80°F (27°C) and lows around 55°F (13°C). Rainfall is infrequent during the summer, with an average of only 2.5 inches per month. The city experiences long days and short nights, with sunset occurring around 9:30 PM in July.

Winter in Federal Way

Winter in Federal Way is cool and wet, with average temperatures ranging from 35°F (2°C) to 45°F (7°C). January is the coldest month, with average lows dropping to 32°F (0°C) and highs reaching 42°F (6°C). Rainfall is common during the winter months, with an average of 6 inches per month. Snowfall is occasional, with the city experiencing an average of 5 inches per year. The days are short and the nights are long, with sunset occurring around 4:30 PM in December.

Maximum and Minimum Temperatures

Federal Way, located in Washington state, United States, experiences moderate seasonal variations in temperature, with distinct differences between summer and winter. During the summer months, from June to September, the average high temperature ranges from 62°F to 70°F (17°C to 21°C), while the average low temperature hovers between 44°F to 52°F (7°C to 11°C). In contrast, winter temperatures are significantly cooler, with average highs ranging from 41°F to 48°F (5°C to 9°C) and average lows dipping to 30°F to 38°F (-1°C to 3°C).

Seasonal Variation

Federal Way’s weather patterns are influenced by its proximity to the Pacific Ocean, which brings in relatively cool and moist air. During the fall and spring, temperatures are generally mild, with average highs in the mid-50s to mid-60s Fahrenheit and average lows in the mid-30s to mid-40s Fahrenheit. However, the region is also susceptible to occasional cold spells and snowfall, especially during the winter months.

Cloud Cover and Types

Federal Way, United States experiences a variety of cloud cover throughout the year. In the winter months, overcast skies and low clouds are common, while the summer months bring a mix of clear days and partly cloudy skies. The average cloud cover percentage ranges from a minimum of 60% in July and August to a maximum of 75% in December and January. This variation in cloud cover is primarily influenced by the seasonal changes in weather patterns, with the mid-latitude cyclone bringing increased cloudiness during the winter and the Pacific high-pressure system contributing to clearer skies in the summer.

Cloud Varieties

The types of clouds observed in Federal Way often align with the prevailing weather conditions. Stratus clouds are prevalent during overcast and drizzly weather, while cumulus clouds indicate fair weather with potential showers. Cirrus clouds, composed of ice crystals, appear in high altitudes and are typically associated with clear or partly cloudy skies. During storms, nimbus clouds produce precipitation in the form of rain or snow. Altostratus clouds, resembling a uniform gray layer, often precede precipitation and can indicate the approach of a warm front. Additionally, Federal Way experiences occasional fog, which is a low-lying cloud that reduces visibility and can pose hazards to transportation.

Precipitation Patterns

Federal Way, Washington, experiences a temperate climate characterized by mild, wet winters and warm, dry summers. The Pacific Ocean’s proximity significantly influences precipitation patterns, with the prevailing westerlies bringing moisture-laden air from the ocean. As air rises over the Olympic Mountains, it cools, condenses, and releases precipitation in the form of rain or snow.

Seasonal Variation

Precipitation in Federal Way varies considerably throughout the year. During the winter months (November to March), the city receives approximately 12 inches of rain, along with occasional snowfall. Cold fronts from the Pacific Northwest often bring heavy rainfall and strong winds. In contrast, summer months (June to August) are typically dry and sunny, with an average rainfall of just 2 inches. This seasonal variation reflects the city’s location within the Pacific Northwest’s Mediterranean climate zone.

Precipitation Patterns

Federal Way, Washington, experiences a temperate maritime climate with abundant rainfall throughout the year. The average annual precipitation is approximately 44 inches (112 cm), significantly higher than the national average of 39 inches. The wettest months are November to February, when precipitation can exceed 5 inches (13 cm) monthly. During these months, frequent low-pressure systems and moisture-laden Pacific air masses bring periods of prolonged rainfall.

Seasonality and Interannual Variability

The precipitation in Federal Way exhibits a distinct seasonal cycle. During the summer months (June to August), precipitation is relatively low, averaging around 1 to 2 inches (3 to 5 cm) per month. This is due to the influence of the Pacific High, which brings stable and dry conditions to the region. Interannual variability in precipitation is also evident, with occasional droughts or unusually wet periods. For instance, during the 2014–2015 drought, Federal Way received only 29 inches (74 cm) of precipitation, significantly below the average. Conversely, the winter of 2021–2022 was exceptionally wet, with over 60 inches (152 cm) of precipitation recorded.

Snowfall Patterns

Federal Way, located in the Pacific Northwest region of the United States, experiences varying snowfall patterns influenced by its maritime climate. Snowfall typically occurs between November and March, but the amount and frequency vary significantly. During an average winter, Federal Way receives approximately 10 inches of snow. However, snowfall can range from a negligible amount in some years to several feet during extreme weather events.

Impacts of Snowfall

Snowfall in Federal Way can have both positive and negative impacts on the community. While it provides opportunities for winter activities and creates a picturesque landscape, it can also disrupt transportation and infrastructure. During heavy snowfalls, roads may become impassable, schools may close, and businesses may experience closures or delays. Additionally, the cold temperatures associated with snowfall can pose health risks, particularly for vulnerable populations such as the elderly and the homeless.

Weather Summary

Federal Way, United States is currently experiencing sunny conditions, with a clear sky and no precipitation. The temperature is a comfortable 57 degrees Fahrenheit (14 degrees Celsius), with a humidity level of 58%. The wind is blowing from the west at 10 miles per hour (16 kilometers per hour). Overall, the weather in Federal Way is pleasant and suitable for outdoor activities.

Forecast

The forecast for the coming week in Federal Way predicts continued sunny and dry weather. Temperatures are expected to remain in the mid to high 50s during the day, dropping to the mid 40s at night. There is no significant chance of precipitation in the forecast. With its mild temperatures and abundant sunshine, the coming week offers an excellent opportunity to enjoy the outdoors in Federal Way. Residents and visitors alike can take advantage of the favorable weather conditions for hiking, biking, or simply relaxing in the park.

Visibility and Observation:

The moon is a celestial body that orbits Earth and is visible from different parts of the world at various times. In Federal Way, Washington, the moon’s visibility depends on factors such as the time of day, weather conditions, and the phase of the moon. During a full moon, it is normally visible throughout the night, while during other phases, it may be visible for shorter durations. To enhance the observation experience, clear skies and minimal light pollution are ideal.

Moonrise and Moonset Times:

The specific moonrise and moonset times in Federal Way vary daily and are affected by the moon’s orbit around Earth. These times can be determined using astronomical tables or online calculators. Knowing the precise moonrise and moonset times allows observers to plan their viewing and photography sessions accordingly. By capturing the moon at different stages of its rise or set, enthusiasts can showcase its unique appearance against the backdrop of the horizon and surrounding landscape.

Average Humidity Levels

Federal Way, located in Washington state, experiences average relative humidity levels throughout the year. The average annual humidity is around 70%, with variations depending on the season. During the summer months (June to August), humidity levels tend to be higher, reaching an average of 80%. This is due to the warm and moist air masses originating from the Pacific Ocean.

In contrast, the winter months (December to February) generally have lower humidity levels, averaging around 60%. This is because the air is colder and holds less moisture. During the spring and fall months (March to May and September to November), humidity levels gradually transition between the extremes of summer and winter, typically ranging from 65% to 75%.

Impact of Humidity

Humidity has a significant impact on human comfort and well-being. When humidity levels are high, the air feels muggy and uncomfortable. This is because the sweat on the skin cannot evaporate efficiently, leading to a feeling of dampness. On the other hand, low humidity levels can cause dryness in the skin, eyes, and nasal passages.

In addition, humidity can also affect the spread of certain diseases. Some viruses and bacteria thrive in high humidity environments, while others prefer drier conditions. Therefore, monitoring humidity levels is crucial for maintaining a healthy indoor environment.

Wind Speed and Direction

Federal Way, located in the Pacific Northwest of the United States, experiences moderate wind speeds throughout the year. The average wind speed ranges from 5 to 10 mph, with stronger winds occurring during the winter months. The predominant wind direction in Federal Way is from the west-southwest, influenced by the prevailing Westerlies. These winds bring moist air from the Pacific Ocean, contributing to the region’s mild and wet climate.

Seasonal Variations

Seasonal variations in wind speed and direction are evident in Federal Way. During the summer months, the winds tend to be lighter and more variable, influenced by local topography and sea breezes. In the fall, the winds gradually increase in strength as the pressure gradient between the ocean and inland areas strengthens. Winter brings the strongest winds, as low-pressure systems move across the region. These winds can reach velocities of up to 30 mph or more, accompanied by gusts and occasional storms. During the spring, the wind speeds decrease again, marking the transition towards the calmer summer months.

Summer (June to August)

Federal Way basks in its prime during the summer months. With average temperatures hovering around 70°F (21°C), it’s the ideal time to enjoy the outdoors. The days are long and sunny, providing ample opportunities for beach lounging, swimming, and kayaking in the Puget Sound. Major events like the Federal Way Community Festival and the Seafair Hydroplane Races draw crowds for their lively atmosphere and entertainment. The city’s parks, such as Wild Waves and Dash Point State Park, come alive with hikers, picnickers, and nature enthusiasts.

Fall (September to November)

As summer transitions into fall, Federal Way experiences a subtle shift in its weather. The temperatures gradually cool down, with averages ranging from 40°F (5°C) to 60°F (16°C). While rainfall increases slightly, it doesn’t dampen the charm of the season. The foliage transforms into a vibrant tapestry of reds, oranges, and yellows, creating stunning landscapes. It’s the perfect time for scenic drives along the waterfront or a leisurely stroll through the city’s tree-lined streets. The annual Federal Way Pumpkin Run and Fall Festival offers family-friendly activities and a chance to soak in the fall festivities.

Potential for Solar Energy

Federal Way, located in Washington State, boasts significant potential for solar energy utilization. With its moderate climate, the city receives an average of 1,850 sunshine hours annually, which is above the national average. The city’s ample rooftop space and relatively low shading provide suitable conditions for residential and commercial solar installations. Additionally, the city’s commitment to sustainability aligns well with the expansion of renewable energy sources, such as solar.

Benefits and Incentives

Solar energy offers numerous benefits to the city and its residents. It reduces greenhouse gas emissions, contributing to climate change mitigation. Solar power can also enhance energy independence by lowering reliance on fossil fuels and grid electricity. In Federal Way, incentives are available to encourage solar adoption. The state of Washington offers tax exemptions and rebates for solar installations, while the city provides expedited permitting processes for renewable energy projects. These incentives, coupled with declining technology costs, make solar energy increasingly accessible and cost-effective for homeowners and businesses.

Landforms and Geology

Federal Way, Washington, is a city located within the Puget Sound region. The area is characterized by a series of glacial landforms and sedimentary deposits that have shaped its topography. Federal Way lies in a lowland area, bounded by two watersheds: the Green River to the north and the Puget Sound to the west. The topography is generally flat, with gentle slopes rising towards the Cascades Mountains to the east. The area has been subject to numerous glacial advances and retreats, resulting in the deposition of various soil types, including glacial till, outwash deposits, and lacustrine sediments. These deposits form the foundation of the region’s topography and provide a basis for the various land uses and vegetation communities found in Federal Way.

Hydrology

Federal Way is drained by several creeks and streams that contribute to the surface water system of the Puget Sound region. The largest of these waterways is the Green River, which flows along the northern boundary of the city. Other significant water bodies include Johnson Creek, Hylebos Creek, and Dash Point Creek. These creeks and streams have carved out valleys and ravines, creating a diverse topography that includes wetlands, riparian areas, and forested slopes. The surface water resources are not only important for supporting the local ecosystem but also provide recreational opportunities such as fishing, boating, and wildlife viewing. Furthermore, the presence of these water bodies influences the microclimate of the area, contributing to the relatively mild temperatures and abundant rainfall characteristic of the Puget Sound region.

Seattle-Tacoma International Airport (SEA)

Seattle-Tacoma International Airport (SEA), also known as Sea-Tac Airport, is the closest commercial airport to Federal Way, Washington. Located approximately 16 miles (26 kilometers) north of the city, it serves as a major hub for Alaska Airlines, Delta Air Lines, Southwest Airlines, and United Airlines. SEA offers a wide range of domestic and international flights, connecting Federal Way to destinations across the United States and beyond. The airport features modern terminals with convenient amenities, including shopping, dining, and transportation options such as rental cars, taxis, and public transit.

Other Nearby Airports

While SEA is the most conveniently located airport for Federal Way, there are other options within a reasonable driving distance. Olympia Regional Airport (OLM), located approximately 30 miles (48 kilometers) southwest of Federal Way, offers limited regional flights. Paine Field (PAE), located approximately 25 miles (40 kilometers) north of Federal Way, is a general aviation airport with a growing number of commercial flights operated by Alaska Airlines and United Airlines. However, it is important to note that these airports may offer fewer flight options and amenities compared to SEA.

Living in Federal Way

Federal Way is a vibrant city located in the southern suburbs of Seattle, Washington. With a population of over 93,000 residents, the city offers a diverse community and a high quality of life. Federal Way is known for its beautiful parks, such as the 333-acre Celebration Park, which hosts numerous events and festivals throughout the year. The city also features a strong school system, with several highly-rated elementary and high schools. Federal Way’s proximity to Seattle makes it an attractive location for commuters, offering easy access to employment and amenities in the metropolitan area.

Things to Do in Federal Way

Federal Way offers a wide range of activities and attractions for residents and visitors alike. The city’s arts and culture scene is thriving, with venues such as the Federal Way Performing Arts Center and the Arts Center NW hosting live performances, exhibitions, and workshops. Outdoor enthusiasts can enjoy hiking and biking trails in the nearby Cascade Mountains, or visit the Redondo Beach Boardwalk for stunning views of Puget Sound. Shopping enthusiasts will find a variety of retail options at The Commons at Federal Way, which features over 100 stores and restaurants. With its diverse offerings, Federal Way provides something for everyone to enjoy.