Dease Lake (BC) Temperature by Month
The average annual maximum temperature in Dease Lake, British Columbia, Canada is 4°C (39°F), with daytime highs ranging from -11°C (12°F) in January to 17°C (63°F) in July. This page covers monthly averages, day-night differences, and how Dease Lake compares to cities worldwide.
Dease Lake Monthly Temperatures
Depending on the time of the year, temperatures range from mild to very cold in Dease Lake. Nighttime lows follow the same pattern, ranging from 7°C (45°F) to -18°C (0°F).
The chart below illustrates the average maximum day and minimum night temperatures in Dease Lake by month:
The minimum temperature is often recorded between 4 AM and 6 AM, while the highest temperature is usually reached at 3 PM, when the sun's heating effect is strongest. July, the warmest month, gets 210 hours of sunshine.
The chart below shows the average temperature throughout the year:
Daily Historical Temperatures
48-year average (1976-2025)
Average high and low temperatures for each day of the month based on long-term records.
Average temperatures in June
Historical Dease Lake Temperatures: 1976-2026
Browse day-by-day temperature records for Dease Lake spanning 51 years. Select any month and year to see actual high and low temperatures recorded on each day.
Temperature: Dease Lake vs Canada
The map below shows the annual temperature across Canada. You can also select individual months if you want to compare a specific time of year.
very warm
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Dease Lake vs World: Temperature Compared
Dease Lake's average annual maximum temperature is 4°C (39°F). To put that in context, here's how it compares to a few well-known destinations:
Lisbon, Portugal averages 21°C (70°F) annually — warm summers, mild winters, and rain mainly in the cooler months.
Glasgow, Scotland averages 13°C (55°F) a year — mild but often grey, with cold winters and rarely hot summers.
Beijing, China averages 20°C (68°F) annually, but with big seasonal swings — very cold winters and hot summers.
Adelaide, Australia averages 21°C (70°F) a year, with warm summers, mild winters, and relatively low rainfall year-round.
Climate temperature data is typically calculated as a 30-year average. This smooths out year-to-year variability and gives a more reliable picture of what a place is actually like, rather than what happened in any single unusual year.
The readings come from a range of sources — land-based weather stations, ocean buoys, ships, and satellites. That data is collected by weather services around the world, then pooled, quality-checked, and averaged to produce the climate records you see here.
Global average temperatures have risen by around 1.2°C since the pre-industrial era, and the effects are visible across many regions. Winters are milder on average, with fewer frost days and less snow in many parts of the world. Heatwaves are more frequent and more intense, and Europe's summers of 2018, 2019, and 2020 all set records.
Summers are also getting drier in some areas, while winter rainfall has increased in others. This contributies to higher river levels and more flooding. In many countries, spring arrives earlier and autumn lasts longer. It has knock-on effects for wildlife, agriculture, and local ecosystems.
For more on Dease Lake's weather — including monthly rainfall, sunshine hours, and humidity — visit our Dease Lake climate page.
