Bothell (WA) Weather & Climate: Best Time to Visit

The climate in Bothell is known for significant temperature differences throughout the year, making the weather dynamic. Typically, average maximum daytime temperatures range from a comfortable 25°C (77°F) in August to a chilly 7°C (45°F) in the coolest month, December.

Nights vary from 13°C (55°F) in August to around 2°C (36°F) during the colder months.

Check out our detailed temperature page for more information.

Temperature ranges by month

Bothell has a notably wet climate with abundant precipitation, recording 1074 mm (42 in) of rain/snowfall per year. The climate in Bothell shows significant variation throughout the year. Expect heavy rainfall in November, the wettest month, with an average of 169 mm (6.7 in) of precipitation over 21 rainy days.

In contrast, the driest month July offers drier and sunnier days, with around 18 mm (0.7 in) of rainfall over 6 rainy days. For more details, please visit our Bothell Precipitation page.

The mean monthly precipitation over the year, including rain, hail, and snow

The average number of days each month with precipitation

For those who appreciate different seasons, Bothell serves as an ideal destination. Expect longer, more sun-filled days in July with an average of 10.4 hours of sunshine daily, and embrace the darker days in December, offering only 1.8 hours of daily sunlight.

Visit our detailed sunshine hours page for more information.

Monthly hours of sunshine

Daily hours of sunshine

Daily percentage of sunshine

The relative humidity is high throughout the year in Bothell.

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