Kennewick Climate & Monthly Temperature Overview – United States

Summer

Kennewick experiences warm, dry summers with average temperatures ranging from mid-60s to low 90s. July and August are the warmest months, with average highs of 89°F and 92°F, respectively. Precipitation is scarce during the summer, with an average of only 0.1 inches of rain per month. The low humidity and lack of rainfall make for comfortable conditions, ideal for outdoor activities and enjoying the sunshine.

Winter

In contrast to the warm summers, Kennewick’s winters are relatively mild with average temperatures hovering between the mid-20s and low 40s. December and January are the coldest months, with average lows of 26°F and 27°F. Despite the cool temperatures, snowfall is infrequent, averaging only about 2 inches per year. The lack of snow and generally mild conditions allow for most outdoor activities to continue throughout the winter, though layers of clothing and occasional rain showers may be necessary.

Monthly Average Temperatures

Kennewick, located in southeastern Washington State, experiences a semi-arid climate with warm, dry summers and mild, wet winters. The monthly average temperatures vary significantly throughout the year, reflecting the region’s seasonal changes.

Summer in Kennewick is characterized by hot, dry weather, with average high temperatures exceeding 85°F (29.4°C) from June to August. The warmest month is July, with an average high of 94°F (34.4°C) and an average low of 64°F (17.8°C). However, the low humidity and lack of precipitation make the heat tolerable. Nights are generally warm, providing little relief from the daytime temperatures.

Winter in Kennewick is mild compared to other parts of the Pacific Northwest, with average high temperatures typically in the mid-40s (°F) and average lows in the mid-30s (°F). December and January are the coldest months, with average highs around 42°F (5.6°C) and average lows around 30°F (-1.1°C). While freezing temperatures are common during winter nights, daytime temperatures often rise above freezing. Occasionally, cold fronts can bring freezing temperatures and even snow to Kennewick, but these events are infrequent and typically short-lived.

Climate and Clouds in Kennewick, United States

Kennewick, Washington, experiences a steppe climate characterized by hot, dry summers and cool, wet winters with moderate precipitation and low humidity throughout the year. The average temperature in Kennewick is 53.2 °F (11.8 °C), with an average annual precipitation of 7.87 inches (200 mm).

During the summer months (June, July, and August), temperatures frequently exceed 90 °F (32 °C), accompanied by low humidity and limited precipitation. Summer evenings typically experience moderate temperatures, providing a welcome respite from the daytime heat. The lack of significant precipitation during the summer months contributes Kennewick’s arid landscape.

In contrast to the dry summers, Kennewick’s winters (December, January, and February) are characterized by cool temperatures, with average lows dipping below freezing. Precipitation during the winter months primarily occurs in the form of rain, occasionally accompanied by snow. While snow accumulation is not common in Kennewick, it can occur during particularly cold weather events, resulting in picturesque snow-covered landscapes.

Annual Precipitation Characteristics

Kennewick, located in the Pacific Northwest region of the United States, experiences a semi-arid climate with relatively low annual precipitation. The city receives an average of 7.28 inches of rainfall per year, which is significantly lower than the national average of 38 inches. Precipitation is distributed fairly evenly throughout the year, with the wettest months being November through January. During these months, Kennewick can expect an average of 1.2 inches of rainfall each. Conversely, the driest months are July and August, when precipitation averages around 0.1 inches.

Seasonality of Precipitation

The seasonality of precipitation in Kennewick is primarily influenced by its location in the rain shadow of the Cascade Mountains. The mountains block moist air from the Pacific Ocean from reaching the city, resulting in a drier climate. During the winter months, the jet stream dips southward, bringing storms from the Pacific Northwest into the Columbia Basin, where Kennewick is situated. These storms often bring snow to the city, which can account for a significant portion of the annual precipitation. In contrast, during the summer months, the jet stream shifts northward, leaving Kennewick under the influence of a high-pressure system that brings clear skies and dry conditions.

Rainfall Patterns:

Kennewick, Washington, experiences a Mediterranean climate characterized by hot, dry summers and mild, wet winters. The city receives an average of 8 inches of annual rainfall, with most precipitation occurring between October and April. During these months, the Pacific Ocean storm track brings frequent rain showers and occasional storms. Summer rainfall is scarce, with July and August typically being the driest months. The lack of summer rain contributes to the region’s aridity and the need for irrigation in agriculture.

Drought Conditions:

Kennewick’s rainfall patterns are susceptible to natural climate variability, including droughts. Drought conditions arise when precipitation falls significantly below average for an extended period. Prolonged droughts can lead to water shortages, crop failures, and wildfires. The city has experienced several severe droughts in recent decades, including the 2014-2015 drought that caused widespread water restrictions and economic losses. Climate change projections indicate that the frequency and severity of droughts may increase in the future, posing a challenge to the sustainability of Kennewick’s water resources.

History of Snowfall in Kennewick

Kennewick, nestled in southeastern Washington, is characterized by an arid climate with minimal precipitation throughout the year. Snowfall, therefore, is a rare occurrence in the city. While the average annual snowfall is a mere 0.1 inches, there have been a few notable snow events in the past. In December 2008, Kennewick experienced a snowfall of 5.9 inches, which was the highest recorded snowfall in the city’s history. Another significant snowfall occurred in February 2019, when 4.7 inches of snow fell over the city. Despite these occasional snowfalls, Kennewick remains a city where snow is seldom seen.

Impact of Snowfall on Kennewick

The infrequency of snowfall in Kennewick has a limited impact on the city’s infrastructure and daily life. Due to the rarity of snow accumulation, Kennewick does not have snow removal equipment or specialized snow-clearing procedures in place. City services and public transportation continue to operate as usual during snowfall events, albeit with potential delays due to slippery road conditions. Residents are advised to be prepared for winter driving conditions and hazardous road surfaces during the occasional snowy periods. While snowfall can provide recreational opportunities such as sledding or snowball fights, its rarity prevents it from being a prominent aspect of winter life in Kennewick.

Sunrise and Sunset Times in Kennewick, United States

Kennewick, located in the Pacific Northwest of the United States, experiences a wide range of sunrise and sunset times throughout the year. During the summer months, days are longer, with sunrise typically occurring between 5:00 and 5:30 AM and sunset between 9:00 and 9:30 PM. The longest day of the year, also known as the summer solstice, occurs around June 21st, when the sun rises around 5:00 AM and sets around 9:30 PM.

In contrast, during the winter months, days are shorter, with sunrise typically occurring between 7:00 and 7:30 AM and sunset between 4:30 and 5:00 PM. The shortest day of the year, also known as the winter solstice, occurs around December 21st, when the sun rises around 7:30 AM and sets around 4:30 PM. The variation in sunrise and sunset times is primarily due to the Earth’s tilt on its axis and its orbit around the sun.

Annual Humidity Variations

Kennewick, Washington experiences significant variations in humidity throughout the year. During the summer months (June to August), humidity levels are typically low, with relative humidity values often dipping below 30%. This is due to the dry and arid climate of the Pacific Northwest, resulting in warm and dry conditions. However, as autumn approaches and temperatures cool down, humidity levels start to rise. By winter (December to February), relative humidity can reach up to 70% or higher, creating a damp and chilly atmosphere.

Seasonal Influences on Humidity

The distinct seasons in Kennewick play a major role in influencing humidity levels. The dry summer season is influenced by the presence of high-pressure systems and easterly winds, which inhibit cloud formation and precipitation. As a result, the air remains relatively dry, leading to low humidity. In contrast, during the winter months, the region falls under the influence of low-pressure systems and westerly winds, which bring in moisture from the Pacific Ocean. This leads to increased cloud cover and precipitation, resulting in higher humidity levels.

Wind Patterns

Kennewick’s wind patterns are predominantly influenced by the region’s geographical location within the Columbia Basin. The Cascade Mountains to the west block moist air from the Pacific Ocean, creating a rain shadow effect that results in a dry, continental climate. The prevailing wind direction is from the northwest, bringing cool, dry air from the Pacific Northwest. These winds are often strongest during the spring and summer months, when the temperature gradient between the ocean and the interior is greatest.

During the winter months, however, the wind patterns can shift due to the influence of the polar jet stream. The jet stream is a narrow band of high-altitude winds that flows from west to east across the Northern Hemisphere. When the jet stream dips southward, it can bring cold, arctic air into the Columbia Basin. This can lead to strong, gusty winds from the northeast or east.

Spring and Fall: Optimal Seasons for Exploration and Outdoor Recreation

Kennewick’s spring and fall seasons offer a delightful blend of warmth and comfort. From April to May, nature awakens with vibrant wildflowers carpeting the rolling hills, creating a picturesque backdrop. Temperatures hover around a comfortable 60-70°F (16-21°C), making it ideal for outdoor pursuits. Enjoy scenic hikes along the Columbia River Gorge, kayak through tranquil waters, or explore the nearby vineyards and orchards. The shoulder months of September and October offer equally pleasant conditions, with temperatures lingering in the mid-60s to low 70s (18-22°C). The vibrant fall foliage adds a touch of enchantment to the landscape, making it a perfect time for nature photography and leisurely walks.

Summer: Warm and Sun-Kissed Days

Summer in Kennewick brings warm, sunny days and balmy evenings. Temperatures average in the mid-80s to low 90s (29-32°C), inviting outdoor enthusiasts to bask in the sun. Spend lazy afternoons swimming in the Columbia River, picnicking in one of the many waterfront parks, or exploring the local wineries. Evenings offer a respite from the heat, with temperatures cooling to a comfortable mid-60s to low 70s (18-22°C). Catch a baseball game at the Toyota Field, savor a meal at one of the outdoor restaurants, or simply wander through the charming historic downtown. With its long days and warm nights, summer is a perfect time to embrace the outdoors and experience all that Kennewick has to offer.

Solar Energy Potential

Kennewick, Washington has abundant solar resources, making it an ideal location for solar energy development. The city receives an average of 2,705 sunshine hours annually, significantly higher than the national average of 2,050 hours. This solar potential offers significant opportunities for the generation of clean and renewable energy. The city’s ample sunshine, combined with its relatively moderate climate, provides a favorable environment for solar photovoltaic (PV) systems, which convert sunlight directly into electricity.

Solar Energy Development

Kennewick has embraced solar energy and has taken several initiatives to promote its development. The city has adopted building codes that encourage the installation of solar PV systems on new construction and major renovations. Additionally, Kennewick has implemented net metering policies that allow solar system owners to sell excess electricity back to the grid at retail rates, incentivizing the adoption of renewable energy. These policies have contributed to a steady growth in solar energy installations within the city. In 2021, Kennewick had a cumulative installed solar capacity of over 6 megawatts, providing a clean and sustainable source of power for its residents and businesses.

Terrain Features

The topography of Kennewick, Washington, is characterized by diverse terrain features. The city is located in the Columbia River Basin, with the Columbia River to the east and the Yakima River to the south. The terrain is primarily flat and arid, with gently rolling hills and isolated ridges. However, the Rattlesnake Hills, located in the southeastern part of the city, offer a significant elevation contrast, rising approximately 400 feet above the surrounding area. These hills provide scenic views and contribute to the varied topography of Kennewick.

Unique Geological Formations

Kennewick is home to several unique geological formations that enhance its topographic landscape. The Sacajawea Heritage Trail, a paved walkway along the Columbia River, offers stunning views of basalt cliffs and islands. These cliffs were formed by volcanic eruptions millions of years ago and have been shaped by the erosive power of the river. Additionally, the Ringold Formation, a series of ancient sand dunes, is found in the northern part of the city. These dunes, now stabilized by vegetation, create a rolling topography that adds to the region’s scenic beauty. These geological features not only contribute to the visual interest of Kennewick but also provide insights into the area’s rich geological history.

Pasco Tri-Cities Airport (PSC)

Pasco Tri-Cities Airport (PSC), located just 5 miles from Kennewick in Pasco, Washington, is the nearest commercial airport. PSC serves several major airlines, including Delta Air Lines, United Airlines, and Alaska Airlines, offering non-stop flights to major cities such as Seattle, Portland, San Francisco, and Los Angeles. The airport features a modern terminal with amenities such as shops, restaurants, and free Wi-Fi. Passengers can easily access Kennewick via taxi, ride-sharing services, or rental cars.

Yakima Air Terminal (YKM)

Yakima Air Terminal (YKM), approximately 35 miles southeast of Kennewick, is another nearby airport option. YKM serves smaller regional airlines and offers limited flights to select destinations, including Seattle and Spokane. While it may not be as convenient as PSC, YKM provides an alternative for passengers seeking specific flight options or lower airfares. The airport has a compact terminal with basic amenities and offers rental car services. Passengers can reach Kennewick by driving or arranging private transportation.

History and Culture

Kennewick’s history dates back to ancient Native American settlements. In the 19th century, the area became a hub for fur trading and farming. The city was incorporated in 1904 and named after the Kennewick Irrigation District, which brought water to the region. Kennewick has a rich cultural heritage, with a thriving arts scene and several museums, including the REACH Museum, which showcases the region’s history and culture. The city also hosts annual events such as the Washington State International Kite Festival and the Kennewick Farmers Market.

Economy and Infrastructure

Kennewick is a major economic center in southeastern Washington. The city is home to a diverse range of industries, including manufacturing, technology, retail, and agriculture. One of Kennewick’s largest employers is the Hanford Nuclear Reservation, a federal nuclear research and waste management facility. The city is also a hub for transportation, with access to major highways, rail lines, and the Tri-Cities Airport. Kennewick’s infrastructure is well-developed, with modern utilities, excellent schools, and a comprehensive network of parks and recreation areas. The city’s location along the Columbia River provides scenic views and opportunities for outdoor recreation, such as boating, fishing, and hiking.