Climate Overview
The climate in Dease Lake Airport is cold. The average annual temperature is -1°C and approximately 665mm of precipitation falls per year. August is the wettest month, receiving around 102mm of rainfall. Dease Lake 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 December, February, January, when temperatures can drop to -17°C. Snowfall occurs from January to December, with around 200cm accumulating over the season.
Temperature
Temperatures in Dease Lake Airport vary considerably across the year, with a 35°C difference between the coldest and warmest months. July is the warmest month, though highs remain moderate at 18°C with a mean of 12°C. December brings the harshest conditions, with lows dropping to -17°C and an average temperature of -14°C. On average, daily temperatures fluctuate by about 9°C between overnight lows and afternoon highs. The sharpest temperature change occurs between October and November, with a 9°C shift in average temperatures.
Precipitation
Dease Lake Airport is a relatively dry area, receiving approximately 665mm of precipitation annually, which averages out to around 55mm per month. The wettest month is August, averaging 102mm of rainfall. July and June also tend to see above-average precipitation. The driest month is March, with just 29mm. That's 73mm less than August, the wettest month. Precipitation varies noticeably between seasons, with the second half (July to December) of the year generally seeing more rainfall. Snowfall is a regular feature from January to December, with around 200cm accumulating over the season. November typically sees the most snow at around 36cm.
Wind
Dease Lake Airport is relatively calm, 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 April, averaging 14km/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 4km/h gap between the calmest and windiest months. Wind tends to pick up during the summer months. The seasonal averages are 10km/h in winter, 13km/h in spring, 12km/h in summer, 12km/h in autumn.
Seasons
89 days until Summer
It is currently spring in Dease Lake Airport, which began on March 20, 2026. Dease Lake 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 18°C, while the coldest stretch bottoms out in December near -17°C. Summer is next, beginning on June 21, 2026 — 89 days from now.
Spring
Temperatures range from -12 to 13°C. Rainfall is relatively light, with around 122mm over the season and a monthly average of 41mm. Winds are generally light, averaging 13km/h. Light layers work well as temperatures warm through the season — a great time to be outdoors.
Summer
Temperatures range from 5 to 18°C. Precipitation is moderate at around 276mm for the season, averaging 92mm per month. Winds are generally light, averaging 12km/h. Comfortable clothing with a light layer for cooler evenings is all you need.
Autumn
Temperatures range from -12 to 11°C. Precipitation is moderate at around 165mm for the season, averaging 55mm per month. Expect around 62cm of snow accumulation during this period. Winds are generally light, averaging 12km/h. Layered clothing works best as temperatures gradually cool — enjoy the crisp air and changing scenery.
Winter
Temperatures range from -17 to -7°C. Rainfall is relatively light, with around 103mm over the season and a monthly average of 34mm. Expect around 80cm of snow accumulation during this period. Winds are generally light, averaging 10km/h. Heavy layering and insulated outerwear are essential — exposed skin should be minimised outdoors.
Monthly Climate Data
The table below shows monthly climate averages for Dease Lake 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.
