Alert Weather in May
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.
Rainfall in Alert in May
Typically, you can expect about 8 days of snow this month, with 18 mm (0.7 in) on average. Neither particularly heavy nor particularly frequent, the rain this month is about average. A light jacket should be enough on most wet days.
Temperature in Alert in May
Daytime highs in Alert in May reach -6°C (21°F), with nights around -11°C (12°F). It stays very cold throughout much of the day, so warm winter clothing is essential. With lows of -11°C (12°F), nights are freezing. Packing a spare blanket is worth considering if you're staying somewhere that might not be fully heated. Expect very cold weather this month, so bundle up in warm clothing. It's essential to be ready for the chill.
Sunshine in Alert in May
Enjoy a sunny month with about 428 hours of sunshine, making it one of the brighter months of the year despite the cool conditions.
Wind Speed in Alert in May
Wind speeds average 2 m/s (4 knots) during May. At this speed, expect light breezes that you can feel on your face and cause leaves to rustle gently. Since this is an average, some days are calmer with barely any wind while others have more noticeable gentle breezes.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.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit Canada, check out our Alert's climate page.
Alert Temperature in May
Min Temperature
-11°C (12°F)
Max Temperature
-6°C (21°F)
Chance of Rain
27%
Precipitation
18 mm (0.7 in)
Rainy days
8 days
Humidity
81%
Windspeed
2 m/s (4 knots)
Sunshine
428 hours
Percentage Sunshine
56%
Daily Historical Temperatures
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).
Average temperatures in May
Historical weather for Alert in May
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.
Alert historical weather extremes in May
According to our 32 years of weather records for Alert, the following extremes were recorded between 1994 and 2026.
- On May 31, 2012, temperatures climbed to 8°C (46°F), marking the warmest May day on record.
- The lowest overnight temperature recorded in May was -26°C (-15°F) (May 2, 1998).
Best Places in Canada in May
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
pleasant
tolerable
unpleasant
poor
What to Wear in Alert in May
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.What To Do in Alert in May
We rated the following activities from 1 (least suitable) to 10 (best) to do.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit Canada, check out our Alert's climate page.
Temperature Rainfall Sunshine Humidity Wind Speed
See the full Alert climate overview or explore weather in Canada.
