Climate Insights for Cle Elum

The climate in Cle Elum is cool. The average annual temperature is 6°C and approximately 1002mm of precipitation falls per year. December is the wettest month, receiving around 173mm of rainfall. Cle Elum is in the Northern Hemisphere. Summer begins at the end of June and lasts through September. The summer months are: August, July, June. The coldest months are December, January, February, when temperatures can drop to -5°C. Cle Elum experiences heavy snowfall, typically from January through December.

Temperatures in Cle Elum vary considerably across the year, with a 29°C difference between the coldest and warmest months. August is the warmest month, though highs remain moderate at 24°C with a mean of 16°C. The coldest month is December, when overnight lows fall to -5°C and the daily average is -3°C. On average, daily temperatures fluctuate by about 10°C between overnight lows and afternoon highs. The sharpest temperature change occurs between September and October, with a 6°C shift in average temperatures.

Cle Elum is a moderately rainy area, receiving approximately 1002mm of precipitation annually, which averages out to around 84mm per month. The wettest month is December, averaging 173mm of rainfall. January and November also tend to see above-average precipitation. The driest month is July, with just 9mm. That's 164mm 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. Cle Elum receives heavy snowfall, accumulating around 392cm annually from January through December. The snowiest month is December, with approximately 99cm. Winter travel should account for significant snow cover.

Cle Elum is mildly breezy, with an average annual wind speed of 12km/h. For context, sustained winds below 12km/h are generally light, while anything above 25km/h is considered strong. The windiest month is June, averaging 15km/h, though still comfortable for most outdoor activities. The calmest conditions occur in December, with average winds dropping to 10km/h, making it an ideal period for wind-sensitive activities. There is moderate seasonal variation in wind speed, with a 5km/h gap between the calmest and windiest months. Wind tends to pick up during the summer months. The seasonal averages are 11km/h in winter, 13km/h in spring, 14km/h in summer, 11km/h in autumn.

It is currently spring in Cle Elum, which began on March 20, 2026. Cle Elum 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 August at around 24°C, while the coldest stretch bottoms out in December near -5°C. Summer is next, beginning on June 21, 2026 — 91 days from now.

The best time to visit Cle Elum is during July and August, when the weather is most comfortable for travellers. During these months, average temperatures hover around 16°C with modest rainfall averaging 9mm per month. By contrast, December can be quite cold with temperatures dropping to -5°C. With minimal rainfall expected, you can pack light and plan outdoor activities with confidence.

The table below shows monthly climate averages for Cle Elum 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.