Climate Insights for Bonney Lake

The climate in Bonney Lake is temperate. The average annual temperature is 11°C and approximately 1394mm of precipitation falls per year. Dicembre is the wettest month, receiving around 216mm of rainfall. Bonney Lake 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 3°C. Snowfall occurs from January to December, with around 66cm accumulating over the season.

Temperatures in Bonney Lake vary considerably across the year, with a 22°C difference between the coldest and warmest months. Agosto is the warmest month, though highs remain moderate at 25°C with a mean of 19°C. Febbraio is the coolest month, with minimum temperatures around 3°C and an average of 5°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.

Bonney Lake is a fairly wet location, receiving approximately 1394mm of precipitation annually, which averages out to around 116mm per month. The wettest month is December, averaging 216mm of rainfall. January and November also tend to see above-average precipitation. The driest month is July, with just 13mm. That's 203mm 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. Snowfall is a regular feature from January to December, with around 66cm accumulating over the season. February typically sees the most snow at around 21cm.

Bonney Lake is mildly breezy, with an average annual wind speed of 14km/h. For context, sustained winds below 12km/h are generally light, while anything above 25km/h is considered strong. The windiest month is February, averaging 15km/h, though still comfortable for most outdoor activities. The calmest conditions occur in July, with average winds dropping to 11km/h, making it an ideal period for wind-sensitive activities. Wind conditions are fairly consistent throughout the year, varying by only 4km/h 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 15km/h in winter, 14km/h in spring, 12km/h in summer, 14km/h in autumn.

It is currently winter in Bonney Lake, which began on December 21, 2026. Bonney Lake 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 25°C, while the coldest stretch bottoms out in Febbraio near 3°C. Spring is next, beginning on March 20, 2026 — 1 days from now.

The best time to visit Bonney Lake 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 40mm per month. By contrast, Febbraio can be quite cold with temperatures dropping to 3°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 Bonney Lake 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.