Spokane Valley Climate & Monthly Temperature Overview – United States

Summer

Spokane Valley experiences warm and dry summers, with average temperatures ranging from the mid-60s to low-80s Fahrenheit. July is the warmest month, with average high temperatures reaching 87°F. Precipitation is sparse during the summer, with an average of only 1.2 inches of rainfall in July. The low humidity and cool nights make it pleasant to spend time outdoors. Afternoon thunderstorms are occasionally possible.

Winter

The winters in Spokane Valley are cold and snowy, with average temperatures dropping into the 20s and 30s Fahrenheit. January is the coldest month, with average low temperatures falling to 19°F. Snowfall is common, with an average of 20 inches falling throughout the winter months. Heavy snowstorms can occur, sometimes leading to road closures and school cancellations. The cold and snow can make it difficult to get around, but the winter wonderland setting can also be beautiful.

Seasonal Variations

Spokane Valley experiences distinct seasonal temperature variations. Summer months (June to August) are typically warm and dry, with average daily high temperatures ranging from the mid-70s to low-80s Fahrenheit (24-28°C). Nights remain relatively cool, with temperatures dipping into the low-50s Fahrenheit (11-13°C). Winters (December to February) are cold and often snowy, characterized by an average daily high temperature in the low-40s Fahrenheit (5-6°C) and average daily low temperatures dropping below freezing.

Annual Trends

Over the course of the year, the average temperature in Spokane Valley exhibits a sinusoidal pattern. The warmest month on average is July, with an average daily high of 81°F (27°C) and a daily low of 55°F (13°C). The coldest month is January, which sees an average daily high of 38°F (3°C) and a daily low of 24°F (-4°C). The average annual temperature is approximately 51°F (11°C).

Cloud Cover in Spokane Valley

Spokane Valley, nestled in the eastern region of Washington state, experiences a diverse array of cloud formations throughout the year. During the winter months, cloud cover is prevalent, often bringing overcast conditions. Stratus clouds, characterized by their uniform, gray appearance, frequently linger, blocking out the sun’s rays. These clouds can contribute to an extended period of low visibility, resulting in misty or foggy conditions. Additionally, nimbostratus clouds, associated with drizzle or light rain, are commonly observed, leading to a dreary and overcast ambiance.

Seasonal Variation in Cloud Formation

As spring approaches, cloud cover in Spokane Valley begins to diminish, giving way to clearer skies. Cumulus clouds, with their cotton-ball-like appearance, become more prominent, often dotting the horizon. These clouds typically indicate fair weather, allowing for ample sunlight and warmth. However, during the transition from spring to summer, thunderstorms may occasionally develop, bringing with them towering cumulonimbus clouds. These clouds, reaching high into the atmosphere, can unleash heavy rainfall, lightning, and thunder. As summer progresses, cloud cover reaches its lowest point, with clear skies dominating the landscape. However, high-altitude cirrus clouds, composed of ice crystals, occasionally drift across the sky, adding a delicate touch to the otherwise blue expanse.

Climate and Precipitation Patterns

Spokane Valley, located in Washington State, experiences a temperate continental climate with distinct seasonal variations. Summer months are generally warm and dry, characterized by average high temperatures in the mid-70s Fahrenheit and infrequent precipitation. In contrast, winters are cold and wet, with average high temperatures in the mid-30s Fahrenheit and significant snowfall. The transitional months of spring and fall bring moderate temperatures and variable precipitation patterns.

The annual precipitation in Spokane Valley averages around 16 inches, with most occurring during the winter months. Snowfall is common from November to March, with an average annual accumulation of over 20 inches. The wettest month is typically December, while July and August are the driest. The valley’s position in the rain shadow of the Cascade Mountains influences its precipitation patterns, limiting rainfall during the summer months when westerly winds carry moisture over the mountains and away from the region.

Annual Rainfall

Spokane Valley, located in the state of Washington, United States, experiences an average annual rainfall of approximately 19 inches (48 centimeters). This precipitation is distributed fairly evenly throughout the year, with the wettest months being November through January and the driest months being July and August. However, rainfall patterns can vary significantly from year to year, and Spokane Valley has experienced periods of both severe drought and heavy flooding.

Climate Factors

The rainfall patterns in Spokane Valley are influenced by several climate factors. The region is located in the rain shadow of the Cascade Mountains, which block most of the moisture from the Pacific Ocean from reaching the area. Additionally, the prevailing wind patterns in the Pacific Northwest tend to direct storms away from Spokane Valley. As a result, the region receives less rainfall than other parts of Washington state, such as the Olympic Peninsula and the Puget Sound region.

Climate and Snowfall Trends

Spokane Valley experiences a semi-arid climate characterized by moderate temperatures and relatively low precipitation. The valley receives around 18 inches of snowfall annually, with most accumulation occurring during the winter months of December, January, and February. Snowfall can vary significantly from year to year, influenced by factors such as temperature patterns and Pacific Ocean conditions. While the city generally experiences mild winters, occasional snowstorms can bring heavy snowfall, leading to road closures and power outages.

Impact on Community and Economy

Snowfall in Spokane Valley can have a significant impact on the community and local economy. Heavy snowfall can cause travel disruptions, school closures, and other transportation-related issues. However, snowfall also provides opportunities for winter recreation, including skiing, snowboarding, and snowshoeing. The presence of snow can boost tourism during the winter months, supporting local businesses and providing a recreational outlet for residents and visitors alike. To mitigate the challenges posed by snowfall, the city employs snow removal and deicing efforts to maintain safe road conditions and minimize disruptions to daily life.

Sun Exposure Index

The sun in Spokane Valley, United States, is classified as very strong to extreme throughout the year. The Sun Exposure Index (SEI) ranges from 6 to 11, with 11 being the most extreme level. The SEI is an indicator of the strength of the sun’s UV radiation, which can cause skin damage and other health risks. During the summer months, the SEI in Spokane Valley is typically at its peak, reaching levels of 11. In the winter months, the SEI is lower, but still remains in the moderate to high range, with levels typically between 6 and 8.

Sun Protection

Due to the high levels of UV radiation in Spokane Valley, it is essential to take precautions to protect yourself from the sun. This includes wearing protective clothing, such as long-sleeved shirts and pants, hats with wide brims, and sunglasses that block UV rays. It is also important to apply sunscreen with a broad-spectrum SPF of at least 30 to exposed skin. Reapply sunscreen every two hours, or more often if you are swimming or sweating. In addition to these measures, it is advisable to seek shade during the peak sun hours, between 10am and 4pm. By following these precautions, you can reduce your risk of sun damage and protect your skin from the harmful effects of the sun.

Phases of the Moon in Spokane Valley

The appearance of the Moon as seen from Spokane Valley, Washington, USA, goes through various phases throughout the month due to the Moon’s changing position relative to the Sun and Earth. These phases include the new moon, waxing crescent, first quarter, waxing gibbous, full moon, waning gibbous, third quarter, and waning crescent. The new moon marks the start of a lunar cycle when the side of the Moon facing Earth is not illuminated, making it invisible. As the cycle progresses, the Moon’s illuminated portion gradually increases, leading to the first quarter when half of the Moon is visible. The full moon occurs when the entire side of the Moon facing Earth is illuminated, creating a bright circle. After the full moon, the illuminated portion of the Moon gradually decreases, leading to the third quarter and eventually the waning crescent.

Moonrise and Moonset Times in Spokane Valley

The time of moonrise and moonset in Spokane Valley varies throughout the month and year due to the Earth’s rotation and the Moon’s orbit. The time of moonrise is generally earlier in the evening during the summer months and later in the evening during the winter months. Similarly, the time of moonset is generally earlier in the morning during the summer months and later in the morning during the winter months. The specific times of moonrise and moonset can be found on various websites and apps that provide astronomical information tailored to specific locations. Moonrise and moonset times are important for planning activities such as night photography, stargazing, and outdoor events that are influenced by the presence of the Moon in the sky.

Humidity Levels

Spokane Valley, located in the Pacific Northwest region of the United States, generally experiences moderate humidity levels throughout the year. The average relative humidity ranges between 50% and 60%, with seasonal fluctuations. During the summer months, humidity tends to be slightly higher, averaging around 60%, while it drops to around 50% during the winter. The relatively constant humidity levels contribute to the comfortable climate of the area, making it neither too dry nor too humid.

Factors Influencing Humidity

The humidity levels in Spokane Valley are influenced by various factors, including proximity to water bodies, air circulation, and weather patterns. The Spokane River, which flows through the valley, contributes to local humidity levels, especially during the warmer months. The presence of trees and vegetation also helps regulate humidity by releasing moisture into the atmosphere. Additionally, prevailing westerly winds from the Pacific Ocean bring moisture to the region, which affects humidity levels. During the winter, cold temperatures cause the moisture in the air to condense, leading to lower humidity levels.

Prevailing Wind Direction

The prevailing wind direction in Spokane Valley, United States, is northwest. This is due to the influence of the Rocky Mountains, which block the flow of air from the west. As air moves over the mountains, it is forced to turn to the right (in the Northern Hemisphere) due to the Coriolis effect. This results in a northwest wind pattern in the Spokane Valley.

Seasonal Variations

The prevailing wind direction in Spokane Valley does not vary significantly throughout the year. However, there are some seasonal variations. In the winter, the wind is often stronger and comes from the east or northeast. This is due to the formation of cold fronts, which push warm air to the west. In the summer, the wind is typically lighter and comes from the southwest. This is due to the influence of warm, moist air from the Pacific Ocean.

Spring (April-May):

Spring in Spokane Valley is a season of rejuvenation and fresh beginnings. The snow melts away, revealing lush greenery and vibrant wildflowers that bloom in abundance. Temperatures range from mild to warm, with occasional showers that provide ample water to the flourishing flora. This idyllic setting makes for picturesque walks, picnics in the park, and outdoor activities. The Spokane Valley Farmers’ Market opens for the season, offering an array of fresh produce, baked goods, and handcrafted wares.

Summer (June-August):

Summer in Spokane Valley is a time for outdoor adventures and warm weather festivities. Temperatures soar into the 70s and 80s, creating perfect conditions for swimming, boating, and fishing in the numerous lakes and rivers in the area. The Spokane Valley Heritage Museum hosts historical exhibits and events that highlight the region’s rich past. Spokane Valley also comes alive with summer concerts, festivals, and farmers’ markets, offering a lively and celebratory atmosphere. The Spokane Valley Mall provides ample shopping and dining options to complement the outdoor activities.

Solar Energy Potential

Spokane Valley in Washington State offers favorable conditions for solar energy production. The city experiences high solar radiation levels, with an average of 5.5 peak sunlight hours per day. This makes Spokane Valley an ideal location for rooftop and ground-mounted solar photovoltaic (PV) systems. The abundance of sunny days and relatively low levels of cloud cover provide a consistent source of solar power throughout the year.

Economic and Environmental Benefits

Investing in solar energy in Spokane Valley offers significant economic and environmental benefits. Solar PV systems can reduce electricity bills by generating clean, renewable energy on-site. The rising cost of grid electricity makes solar power an attractive alternative, especially for businesses and homeowners who consume large amounts of energy. Additionally, solar energy reduces reliance on fossil fuels, which contributes to lowering greenhouse gas emissions and mitigating climate change.

Topography of Spokane Valley, Washington

Spokane Valley is located at the confluence of the Spokane River and the Little Spokane River in eastern Washington State. The city lies within the Spokane Valley-Rathdrum Prairie Aquifer, a major source of groundwater for the region. The topography of Spokane Valley is characterized by rolling hills and plateaus, with elevations ranging from 1,800 to 2,600 feet above sea level. The Spokane River meanders through the valley, creating a number of scenic gorges and waterfalls.

The bedrock beneath Spokane Valley is primarily composed of granite and gneiss, which was formed during the Precambrian era. Over time, the bedrock has been eroded by glaciers and rivers, resulting in the formation of the valley’s current topography. The soils in Spokane Valley are generally well-drained and fertile, making the area suitable for agriculture. The climate in Spokane Valley is classified as semi-arid, with hot summers and cold winters. The average annual precipitation is about 18 inches.

Spokane International Airport (GEG)

Spokane International Airport (GEG) is the closest airport to Spokane Valley, Washington, located approximately 10 miles (16 kilometers) northwest of the city center. It is the largest airport in the inland Northwest region of the United States and serves as a hub for Alaska Airlines. GEG offers a wide range of domestic and international flights, connecting Spokane Valley to major cities across the country and beyond.

GEG features a modern terminal complex with a variety of amenities for passengers, including restaurants, shops, and free Wi-Fi. The airport is also served by a network of public transportation options, including buses, taxis, and ride-sharing services, making it easy for travelers to reach and depart from Spokane Valley.

History of Spokane Valley

Spokane Valley, Washington, has a rich and diverse history dating back thousands of years. The area was originally inhabited by the Spokane tribe, who lived off the land and practiced traditional Native American customs. In the 19th century, European settlers arrived in the area and established ranches and farms. The valley became an important agricultural hub, and the town of Spokane Valley was incorporated in 1903.

Modern Spokane Valley

Today, Spokane Valley is a thriving city with a population of over 90,000 residents. It is part of the Spokane metropolitan area and is a major economic center in the region. The city is home to several large employers, including Amazon, Itron, and Northern Quest Casino. The valley is also a popular destination for tourists, who come to enjoy the area’s natural beauty, outdoor recreation opportunities, and cultural attractions.