Climate Insights for Lake Chelan Airport

The climate in Lake Chelan Airport is cool. The average annual temperature is 9°C and approximately 555mm of precipitation falls per year. January is the wettest month, receiving around 102mm of rainfall. Lake Chelan Airport 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 January, February, December, when temperatures can drop to -4°C. Lake Chelan Airport experiences heavy snowfall, typically from January through December.

Temperatures in Lake Chelan Airport vary considerably across the year, with a 33°C difference between the coldest and warmest months. The warmest month is August, when average highs reach 29°C and the mean temperature sits around 21°C. The coldest month is January, when overnight lows fall to -4°C and the daily average is -2°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 8°C shift in average temperatures.

Lake Chelan Airport is a relatively dry area, receiving approximately 555mm of precipitation annually, which averages out to around 46mm per month. The wettest month is January, averaging 102mm of rainfall. December and October also tend to see above-average precipitation. The driest month is August, with just 3mm. That's 99mm less than January, 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. Lake Chelan Airport receives heavy snowfall, accumulating around 246cm annually from January through December. The snowiest month is January, with approximately 79cm. Winter travel should account for significant snow cover.

Lake Chelan Airport is relatively calm, with an average annual wind speed of 2km/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 2km/h, though still comfortable for most outdoor activities. The calmest conditions occur in December, with average winds dropping to 1km/h, making it an ideal period for wind-sensitive activities. There is moderate seasonal variation in wind speed, with a 1km/h gap between the calmest and windiest months.

It is currently summer in Lake Chelan Airport, which began on June 21, 2026. Lake Chelan Airport 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 29°C, while the coldest stretch bottoms out in January near -4°C. Autumn is next, beginning on September 23, 2026 — 93 days from now.

The best time to visit Lake Chelan Airport is during June, July, August and September, when the weather is most comfortable for travellers. During these months, average temperatures hover around 18°C with modest rainfall averaging 11mm per month. By contrast, January can be quite cold with temperatures dropping to -4°C. With minimal rainfall expected, you can pack light and plan outdoor activities with confidence.

The table below shows monthly climate averages for Lake Chelan Airport 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.