Climate Insights for Bothell

The climate in Bothell is temperate. The average annual temperature is 11°C and approximately 1379mm of precipitation falls per year. Dicembre is the wettest month, receiving around 202mm of rainfall. Bothell is in the Northern Hemisphere. Summer begins at the end of June and lasts through September. The summer months are: Agosto, Luglio, Giugno. The coldest months are Febbraio, Dicembre, Gennaio, when temperatures can drop to 4°C. Light snow can occur between January and December.

Bothell sees moderate temperature variation throughout the year, ranging from 4°C to 24°C. Agosto is the warmest month, though highs remain moderate at 24°C with a mean of 19°C. Febbraio is the coolest month, with minimum temperatures around 4°C and an average of 6°C. Daily temperature variation is modest, with an average difference of 7°C between highs and lows. The sharpest temperature change occurs between September and October, with a 4°C shift in average temperatures.

Bothell is a fairly wet location, receiving approximately 1379mm of precipitation annually, which averages out to around 115mm per month. The wettest month is December, averaging 202mm of rainfall. January and November also tend to see above-average precipitation. The driest month is July, with just 21mm. That's 180mm less than December, the wettest month. Rainfall is heavily concentrated in certain months, creating a distinct wet and dry season. Visitors should plan around these patterns, as the difference between peak and low months is dramatic. Light snowfall can occur between January and December, totalling around 23cm annually. February is the snowiest month with approximately 11cm.

Bothell is mildly breezy, with an average annual wind speed of 16km/h. For context, sustained winds below 12km/h are generally light, while anything above 25km/h is considered strong. The windiest month is December, averaging 18km/h, though still comfortable for most outdoor activities. The calmest conditions occur in July, with average winds dropping to 12km/h, making it an ideal period for wind-sensitive activities. There is moderate seasonal variation in wind speed, with a 6km/h gap between the calmest and windiest months. Wind tends to be stronger during winter months, driven by seasonal pressure systems. The seasonal averages break down to 18km/h in winter, 16km/h in spring, 13km/h in summer, 16km/h in autumn.

It is currently spring in Bothell, which began on March 20, 2026. Bothell is in the Northern Hemisphere, where spring begins in March, summer in June, autumn in September, and winter in December. The warmest period peaks in Agosto at around 24°C, while the coldest stretch bottoms out in Febbraio near 4°C. Summer is next, beginning on June 21, 2026 — 93 days from now.

The best time to visit Bothell is during Giugno, Luglio, Agosto and Settembre, when the weather is most comfortable for travellers. During these months, average temperatures hover around 17°C with modest rainfall averaging 48mm per month. By contrast, Febbraio can be quite cold with temperatures dropping to 4°C. A light rain jacket is recommended, though showers are generally brief and shouldn't disrupt your plans.

The table below shows monthly climate averages for Bothell based on historical weather data. Min and max temperatures represent typical overnight lows and afternoon highs for each month, shown in degrees Celsius (°C). Precipitation is measured in millimetres (mm) and indicates the average total rainfall per month. Snow is measured in centimetres (cm) and reflects average monthly snowfall accumulation. Wind speed is the average sustained speed in kilometres per hour (km/h). All values are based on averages from over 10 years of historical weather data. The current month is highlighted for quick reference.