What May feels like in Calgary
Late spring arrives in Calgary with May. Expect cool, jacket-on afternoons — comfortable for a long walk. Temperatures fall sharply after dark — a swing of roughly 12.7°C (22.9°F) — and nights are cold. Moderate humidity keeps the air pleasant.
Rain in Calgary in May
It is a changeable month: rain comes about one day in 3, with dry spells in between. Wet days average about 6.5 mm (0.3 in), enough to soak you without an umbrella. Across the year Calgary averages about 5.3 mm per rainy day, so May is typical. It is among the three wettest months of the year.
Daylight and sunshine in May
In mid-May, sunrise is at about 5:47 am and sunset at about 9:17 pm (local time) — 15 h 30 min of daylight. Since mid-April the day has gained 1 h 44 min. Measured sunshine covers about 75% of the daylight — there are plenty of bright spells.
How May compares to the rest of the year
Ranked by average high, May comes out as the 5th warmest month in Calgary. Afternoons run 6.4°C (11.5°F) warmer than in April, with 26 mm more rain. Temperatures keep climbing into June. June averages a high of 19.8°C (67.6°F).
Who May suits
- Sightseeing: a good fit — comfortable enough to explore on foot all day.
- Parks & outdoor: a good fit — comfortable for long walks and picnics.
- Hiking: less ideal — trails are cool.
Tips for visiting Calgary in May
Versatile Layers
Mornings and evenings are cooler than midday, so dress in layers.
Rain Protection
Keep a small umbrella in your bag and wear shoes that cope with puddles.
Warm Layers
A warm jacket, a hat and gloves for cold mornings and evenings.
Sunglasses
Plenty of sun, so bring sunglasses and a cap.
Quick questions
How warm is Calgary in May?
Expect around 16.3°C (61.3°F) in the afternoon and 3.6°C (38.5°F) at night, which most visitors would call cool.
Does it rain a lot in Calgary in May?
It does: about 10 rainy days bring roughly 65 mm, so plan some indoor options.
What should I wear in Calgary in May?
The numbers point to versatile layers, rain protection, warm layers and sunglasses. Bring something extra for the cooler evenings.
Is May or June better for visiting Calgary?
May, narrowly: it ranks #3 of 12 among Calgary's months, against #5 for the other. June is warmer and has more rainy days.