Climate Overview
The climate in Alsek River Airport is cool. The average annual temperature is 4°C and approximately 3370mm of precipitation falls per year. Alsek River Airport receives a notable amount of rainfall throughout the year, including during its driest month. Alsek River Airport is in the Northern Hemisphere. Summer begins at the end of June and lasts through September. The summer months are: July, August, June. The coldest months are February, January, December, when temperatures can drop to -6°C. Alsek River Airport experiences heavy snowfall, typically from January through December.
Temperature
Temperatures in Alsek River Airport vary considerably across the year, with a 23°C difference between the coldest and warmest months. July is the warmest month, though highs remain moderate at 17°C with a mean of 13°C. The coldest month is February, when overnight lows fall to -6°C and the daily average is -4°C. Daily temperature variation is modest, with an average difference of 6°C between highs and lows. The sharpest temperature change occurs between September and October, with a 6°C shift in average temperatures.
Precipitation
Alsek River Airport is a very wet location, receiving approximately 3370mm of precipitation annually, which averages out to around 281mm per month. The wettest month is October, averaging 474mm of rainfall. September and December also tend to see above-average precipitation. The driest month is June, with just 143mm. That's 330mm less than October, the wettest month. Precipitation varies noticeably between seasons, with the second half (July to December) of the year generally seeing more rainfall. Alsek River Airport receives heavy snowfall, accumulating around 949cm annually from January through December. The snowiest month is December, with approximately 195cm. Winter travel should account for significant snow cover.
Wind
Alsek River Airport is relatively calm, with an average annual wind speed of 8km/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 10km/h, though still comfortable for most outdoor activities. The calmest conditions occur in June, with average winds dropping to 6km/h, making it an ideal period for wind-sensitive activities. There is moderate seasonal variation in wind speed, with a 4km/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 10km/h in winter, 7km/h in spring, 6km/h in summer, 9km/h in autumn.
Seasons
7 days until Autumn
It is currently summer in Alsek River Airport, which began on June 21, 2026. Alsek River 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 July at around 17°C, while the coldest stretch bottoms out in February near -6°C. Autumn is next, beginning on September 23, 2026 (7 days from now).
Spring
Temperatures range from -4 to 11°C. Rainfall is heavy, totalling around 565mm across the season with a monthly average of 188mm. Winds are generally light, averaging 7km/h. An umbrella or waterproof jacket is advisable as spring showers are frequent.
Summer
Temperatures range from 8 to 17°C. Rainfall is heavy, totalling around 632mm across the season with a monthly average of 211mm. Winds are generally light, averaging 6km/h. Comfortable clothing with a light layer for cooler evenings is all you need.
Autumn
Temperatures range from -3 to 14°C. Rainfall is heavy, totalling around 1208mm across the season with a monthly average of 403mm. Expect around 172cm of snow accumulation during this period. Winds are generally light, averaging 9km/h. A waterproof jacket and sturdy footwear are recommended as rain becomes more frequent.
Winter
Temperatures range from -6 to -1°C. Rainfall is heavy, totalling around 966mm across the season with a monthly average of 322mm. Expect around 546cm of snow accumulation during this period. Winds are generally light, averaging 10km/h. Warm winter clothing and waterproof boots are a must, and travel may be affected by snow.
Monthly Climate Data
The table below shows monthly climate averages for Alsek River 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.
