The 5 most beautiful lakes in Canada
Explore Canada's stunning lakes: Lake Louise, Lake Superior, Maligne Lake, Emerald Lake, and Lake Okanagan, each offering unique beauty and activities.
With daytime temperatures of -6°C (21°F) and nighttime lows of -11°C (12°F), May in Alert brings very low temperatures during the day. Some snowfall is to be expected during the month.
May in Alert has its charm. However, if you're seeking pleasant, dry and sunny weather, our weather planner can help you explore other destinations in the world.
Pick a month to see the average temperature, rainfall and sunshine in Alert - and find the best time to visit.
50-year average (1976-2025)
Based on our historical records, temperatures in Alert typically rise from around -13°C (9°F) at the start of May to approximately -5°C (23°F) by the end. Nights are very cold, with lows typically ranging from -20°C (-4°F) to -8°C (18°F).
Browse day-by-day weather records for Alert spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
According to our 32 years of weather records for Alert, the following extremes were recorded between 1994 and 2026.
Find out more about the weather in Canada and which places have the best travel conditions in this month. See all of Canada in May →
Perfect weather is subjective. On this map perfect weather has been defined with temperatures between 20°C (68°F) and 29°C (84°F) and not too much precipitation (less than 90 mm (3.5 in) a month).
Winter clothing is essential for visiting Alert in May. If you have a heavy coat, waterproof boots with good traction, and plenty of warm layers it's smart to bring them. Pack cloths like thermal underwear, wool socks, and insulated gloves. With minimal rainfall expected, you can leave the rain gear at home. You'll definitely want to pack sunglasses and sunscreen. There will be plenty of bright sunshine this month.
We rated the following activities from 1 (least suitable) to 10 (best) to do.
Temperature Rainfall Sunshine Humidity Wind Speed
See the full Alert climate overview or explore weather in Canada.
Where to go in May - average daytime high across popular destinations.
Need travel inspiration? Check out our bucket list articles and be inspired.
The 5 most beautiful lakes in Canada
Explore Canada's stunning lakes: Lake Louise, Lake Superior, Maligne Lake, Emerald Lake, and Lake Okanagan, each offering unique beauty and activities.
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