Bellevue (WA) Weather & Climate: Best Time to Visit
Average temperatures, rainfall, sunshine and the best time to visit Bellevue.
Climate overview of Bellevue
Temperatures in Bellevue, Washington State, United States of America, vary greatly throughout the year. July is the hottest month at 25°C (77°F), while December is the coldest at 7°C (45°F).
With around 1107 mm (44 in) of annual rain/snowfall, Bellevue has a notably wet climate. However, this rain/snowfall is not evenly distributed — the city has a distinct dry season from July to August, with warm summers and cold winters. The wettest month is November. The sunniest month is July, with 10.4 hours of sunshine per day on average.
Bellevue Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in Bellevue - and find the best time to visit.
Monthly Temperature in Bellevue
The climate in Bellevue is known for significant temperature differences throughout the year, making the weather dynamic. Average daytime temperatures reach a comfortable 25°C (77°F) in July. In December, the coolest month of the year, temperatures drop to a chilly 7°C (45°F).
At night, temperatures range from around 14°C (57°F) in July to 2°C (36°F) in December.
Check out our detailed temperature page for more information.
Temperature ranges by month
Rainfall in Bellevue
Bellevue has a notably wet climate with abundant precipitation, recording 1107 mm (44 in) of rain/snowfall per year. Bellevue can be quite wet during November, receiving approximately 176 mm (6.9 in) of precipitation over 21 rainy days.
In contrast, during the driest month (July), you will experience much drier conditions, with 17 mm (0.7 in) of precipitation spread across 5 rainy days. For more details, please visit our Bellevue Precipitation page.
The mean monthly precipitation over the year, including rain, hail, and snow
The average number of days each month with precipitation
Sunshine Hours in Bellevue
Bellevue can be enjoyed more throughout the sunniest month of July under a blue sky, with approximately 10.4 hours of sunshine daily. In contrast, the city experiences much darker days in December, with only 1.8 hours of sunlight per day.
Visit our detailed sunshine hours page for more information.
Monthly hours of sunshine
Daily hours of sunshine
Daily percentage of sunshine
Humidity in Bellevue by Month
The relative humidity is high throughout the year in Bellevue.
The city experiences its highest humidity in December, reaching 80%. In July, the humidity drops to its lowest level at 65%. What does this mean? Read our detailed page on humidity levels for further details.
Relative humidity over the year
Wind Speed in Bellevue
The mean wind speed varies between 4 m/s (8 knots) and 5 m/s (10 knots) throughout the year. It is lowest in February, April, May, June, July, August, September, October, November and December and highest during January and March. What does this mean?
The mean monthly wind speed over the year (meters per second)
Best Time to Visit Bellevue
Monthly ratings reflect general weather comfort, based on daytime temperature and rainfall. Swimming and winter conditions are highlighted separately where relevant.
- Best overall: June, July, August and September
- Warmest weather: July and August
- Most sunshine: July
- Fewest rainy days: July and August
- Wettest months: January, October, November and December, when rainfall is highest.
- Seasonal pattern: A distinct dry season from July to August, with warm summers and cold winters
Frequently asked questions about the climate in Bellevue
What is the best time to visit Bellevue?
June, July, August and September typically offer the most optimal weather in Bellevue. In contrast, January, February, March, November and December tend to have less optimal conditions. Bellevue has a distinct dry season from July to August, with warm summers and cold winters.
What temperatures can I expect in Bellevue?
Daytime highs range from 7°C (45°F) in December to 25°C (77°F) in July. Nighttime lows range from 2°C (36°F) to 14°C (57°F). Temperatures vary considerably through the year.
How much rain does Bellevue get?
Annual rainfall is around 1107 mm (44 in). November is the wettest month with 176 mm (6.9 in), while July is the driest with 17 mm (0.7 in).
How sunny is Bellevue?
Bellevue receives around 2,171 hours of sunshine per year. July is the sunniest month with 312 hours, while December is the cloudiest with just 54 hours. Overall, Bellevue enjoys abundant sunshine.
Bellevue 3-Day Forecast
Bellevue (WA) 3-Day Forecast
Bellevue on the map
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