Bellevue, Washington, is known for its diverse and moderate climate, making it an attractive place for both residents and visitors.
The hottest month in Bellevue is August, with an average high of 77°F and a low of 58°F, offering warm, pleasant summers perfect for outdoor activities.
In contrast, the winter season, lasting from November to February, experiences cooler temperatures. December is the coldest month, averaging a high of 46°F and a low of 37°F.
Bellevue’s yearly climate showcases a balance between rainfall and sunshine. On average, Bellevue receives 42 inches of rain annually, contributing to its lush green landscapes.
Compared to the US average, Bellevue has milder winters with only about 5 inches of snow per year. The city lies within the Mediterranean climate zone, classified as Csb, indicating warm, dry summers and cool, wet winters.
For those interested in a comprehensive overview, Bellevue’s historical weather data reveals detailed patterns on temperature, precipitation, and other weather metrics.
The climate graph displays these trends clearly, enabling a better understanding of what to expect from Bellevue’s long-term weather patterns throughout the year.
Average Temperature In Bellevue, Washington
Bellevue, Washington, experiences a wide range of temperatures throughout the year.
The warm season lasts from June 20 to September 13. During this period, the average daily high temperature is above 72°F.
August is the hottest month, with an average high of 77°F and an average low of 58°F.
The cool season, from November 11 to February 29, has an average daily high temperature below 52°F. December, the coldest month, sees average lows around 37°F.
Here is a breakdown of average monthly high and low temperatures in Bellevue:
| Month | Average High (°F) | Average Low (°F) |
|---|---|---|
| January | 47 | 37 |
| February | 50 | 37 |
| March | 54 | 40 |
| April | 60 | 44 |
| May | 66 | 50 |
| June | 71 | 54 |
| July | 76 | 58 |
| August | 77 | 58 |
| September | 72 | 54 |
| October | 61 | 47 |
| November | 52 | 42 |
| December | 47 | 37 |
Bellevue’s weather averages also indicate that the temperature during winter months can drop to around 3.8°C (38.8°F).
The mean annual temperature is approximately 54°F, providing a mild and relatively comfortable climate for its residents.
Average Precipitation In Bellevue, Washington
Bellevue experiences varying precipitation throughout the year, with significant rainfall and occasional snowfall. This section provides specific details about the average rainfall and snowfall.
Average Rainfall In Bellevue, Washington
Bellevue receives substantial rainfall, especially in the winter months. The city experiences an annual average rainfall of around 37 inches.
The rainy season mostly spans from October through March, with November typically being the wettest month, averaging about 176 mm.
During this period, Bellevue sees numerous rainy days, with some months having over 15 days of rain. The summer months, particularly July and August, are much drier, contributing to the city’s overall temperate climate.
Average Snow In Bellevue, Washington
Snowfall in Bellevue is considerably less frequent compared to rainfall. The city receives an average of about 6 inches of snow per year.
Most of the snowfall occurs in January and December, with these months experiencing occasional snow days.
Although heavy snowfall is rare, it can sometimes impact daily activities and transportation. Being aware of occasional snow and ice conditions is important for residents and visitors during these winter months.
Average Sun In Bellevue, Washington
Bellevue, Washington experiences a variety of sunlight hours and solar energy levels throughout the year. Factors like cloud cover and UV index play significant roles in the amount of sun and sunshine hours received.
Average Daily Shortwave Solar Energy In Bellevue, Washington
The average daily shortwave solar energy in Bellevue changes with the seasons.
During summer, the city receives more sunshine hours. This is due to longer days and reduced cloud cover. June and July are particularly sunny, with daylight extending up to 16 hours.
Winter months, especially December, see shorter days with fewer sun hours. The increase in cloud cover during this time also contributes to reduced solar energy levels.
Bellevue averages around 100 sunny days per year, with sunshine hours peaking mid-year.
Cloud cover can significantly affect daylight, with overcast conditions prevailing in the colder months. The UV index also varies, being highest in the summer. Residents should practice sun protection during peak UV periods to avoid health risks.
Average Humidity in Bellevue, Washington
Bellevue, Washington experiences varying levels of humidity throughout the year. The relative humidity can influence how comfortable or muggy the air feels.
Monthly Humidity Levels
- January: Typically high, around 78%.
- February: Also high, close to January’s levels.
- July: The least humid month, around 65% on average.
- December: The most humid month, reaching about 80%.
Dew Point
The dew point also plays a key role in Bellevue’s climate. Throughout the year, it can range from the mid-30s°F in winter to the mid-50s°F in summer, indicating moisture in the air.
Higher dew points correlate with higher humidity, making the air feel warmer and stickier.
Annual Trends
The city’s proximity to bodies of water like Lake Washington and Puget Sound affects its humidity. Winters are more humid due to more precipitation, while summers are less humid, making it the driest time of the year.
For more detailed monthly relative humidity data, visit World Weather & Climate Information.
Average Wind In Bellevue, Washington
Bellevue, Washington typically experiences gentle to moderate wind speeds throughout the year.
Average Wind Speed:
The average wind speed in Bellevue is about 9 mph.
These speeds are generally constant, with slight variations depending on the season.
Wind Direction:
Winds in Bellevue predominantly come from the south and southwest. These directions remain fairly consistent year-round.
Seasonal Variations:
- Winter: Winds are generally calmer with averages around 7-8 mph.
- Summer: Slightly stronger winds can be expected, averaging around 10 mph.
Fall and winter months tend to see the highest winds, occasionally reaching speeds of up to 15 mph.
Statistics such as these provide a better understanding of Bellevue’s wind patterns. Residents and visitors can plan outdoor activities accordingly.
Bellevue’s location and terrain contribute to its unique wind characteristics. Various factors like surrounding water bodies and land elevation also play a role.
Average Air Quality In Bellevue, Washington
Bellevue, Washington, often enjoys good air quality. Most days, the air quality index (AQI) hovers in the “Good” range. This suggests clean air that poses little or no risk to health.
Air Quality Index (AQI) and Temperature
Bellevue sees a range of AQI levels throughout the year. For instance, it frequently shows an AQI of 12, which is excellent.
Temperature in this region can vary widely, from about 69.8°F to 51.8°F during different times of the year.
Weather Conditions
Weather plays a significant role in air quality.
Bellevue often experiences mild, rainy conditions, which help to keep the air clean. These conditions include moderate temperatures, lower pollutant levels, and frequent rain.
Visibility and Pollutants
Visibility in Bellevue is generally good. The area’s low pollution levels contribute to clear skies and good visibility.
PM2.5 pollutants—tiny particles that can damage the lungs—are often at low levels here, maintaining a healthier environment.
Daily Air Quality Forecast
To stay informed about daily air quality, residents can check updates from platforms like IQAir and AccuWeather.
These forecasts provide real-time data and predict upcoming air quality.
Monitoring air quality can help plan daily activities, especially outdoors. During days with poor air quality, it’s better to limit strenuous activities outside.
Topography Of Bellevue, Washington
Bellevue is located in King County, Washington. It lies on the eastern shore of Lake Washington, across from Seattle.
The city’s landscape includes a mix of hills, lakes, and green areas.
The average elevation of Bellevue is approximately 289 feet above sea level.
The city’s terrain varies significantly, featuring both low-lying areas and higher elevations.
Key Elevation Points:
- Minimum Elevation: -13 feet
- Maximum Elevation: 2,897 feet
Bellevue’s topography includes several notable features. The city’s geography is shaped by the nearby Cascade and Olympic Mountains, adding to its varied landscape.
In some areas, the elevation is below sea level, while in others, it reaches several thousand feet.
This varying topography contributes to different microclimates within the city.
Areas at higher elevations might experience slightly cooler temperatures and more snowfall during winter months compared to lower-lying parts of the city.
For those interested in exploring Bellevue’s terrain in greater detail, topographic maps are available.
These maps illustrate the city’s elevation changes and are useful for activities like hiking and planning construction projects.
Access these maps online for more detailed information about the elevation and terrain.
Bellevue’s location in the northern hemisphere influences its seasonal changes, with typical patterns observed in temperatures and weather conditions throughout the year.
Extreme Weather Events That Occur In Bellevue, Washington
Bellevue experiences a variety of extreme weather events throughout the year.
Heatwaves
In the summer, the city can face heatwaves.
For instance, in August 2021, excessive heat watches were issued for temperatures soaring above 90°F. These can lead to health issues, particularly for the elderly and those with pre-existing conditions.
Cold Spells
During winter, Bellevue can encounter cold spells. The coldest month typically is December, with temperatures sometimes going below freezing.
Ice and snow storms are common, affecting daily life and transport.
Heavy Rainfall
Bellevue’s wettest month is often November.
During significant weather events, heavy rainfall can lead to flooding.
For example, in September 2021, Seattle recorded 0.81 inches of rain in a single day, causing local disruptions.
Snowstorms
Snowstorms occasionally hit Bellevue, particularly from December to February.
In December 2022, the city faced a period of intense snowfall, impacting roads and services.
Wind Events
Bellevue can also experience strong winds. November is often the windiest month.
High winds can lead to power outages and fallen trees.
Hailstorms
Though less common, hailstorms do occur. Hail events can cause property damage, particularly to vehicles and rooftops.
Best Time Of The Year To Visit Bellevue, Washington
Bellevue, Washington is an ideal destination for visitors who appreciate mild weather.
Depending on the season you choose to visit, the city offers a variety of experiences from lush greenery to festive winter scenes.
What Is Bellevue, Washington Like In Spring
Spring in Bellevue is mild and pleasant, making it a perfect time for outdoor activities and exploring the city’s natural beauty.
March and April see temperatures ranging from the high 40s to mid-60s Fahrenheit. Rain is common, but it keeps the landscape lush and green.
By May, temperatures climb into the 60s and low 70s, making it ideal for hiking and visiting parks. This season also brings blooming flowers and trees, adding a vibrant touch to places like the Bellevue Botanical Garden.
What Is Bellevue, Washington Like In Summer
Summers in Bellevue are warm and dry, with the weather being most favorable between June and August.
The average high temperatures range from 72°F in June to about 80°F in July and August.
These months are among the best times to visit because of the long daylight hours, perfect for enjoying outdoor activities.
From picnics in parks to water sports in nearby lakes, summer offers plenty of options.
Outdoor festivals and farmers’ markets are also popular during this season.
With less rainfall and plenty of sunny days, it’s no wonder why summer is a peak travel time.
What Is Bellevue, Washington Like In Fall
Fall in Bellevue is cool but not too cold, offering a different kind of charm.
September still enjoys warm days with temperatures in the 70s but begins to cool down into the 60s by October. By November, highs are usually in the low 50s.
This season is known for its beautiful fall foliage.
Places like Kelsey Creek Farm and local parks are ideal for leaf-peeping and enjoying the vibrant colors of the leaves.
Rain becomes more frequent, so visitors should be prepared for wet weather.
What Is Bellevue, Washington Like In Winter
Winter in Bellevue is cool and wet, with temperatures ranging from the mid-30s to low 50s Fahrenheit.
December through February are the coldest months, with January highs around 45°F. Rain is common, although snow is rare.
Despite the chill, winter has its own attractions such as festive holiday events and cozy indoor activities.
For those who don’t mind the cold, winter hikes in nearby parks offer serene landscapes.
Rain gear is a must, but the atmosphere is peaceful and less crowded, making it a unique time to visit.