Calgary in May
In May, Calgary averages 17°C (62°F) during the day and 4°C (39°F) at night, with frequent rain — about 18 days of the month see precipitation (56 mm total).
ShoulderConditions are cool — bring a jacket for evenings. Expect daily rain or showers, often in heavy bursts.
May is one of the wetter and less comfortable months in Calgary. If your dates are flexible, consider a different time of year.
How May compares to the rest of the year in Calgary
May is in the middle of the year for warmth in Calgary (5th of 12) and one of the wettest months (2nd of 12). Daytime temperature runs 7°C above the annual average (10°C). May runs 6°C warmer than April (11°C) and warms a further 4°C into June (21°C).
May sunrise & sunset in Calgary
Times shown for Calgary local time (America/Edmonton), calculated for the 15th of May. They shift by a few minutes day to day across the month.
Photography light in Calgary — May
Golden-hour and blue-hour windows for the 15th of May, in Calgary's local time. Use these for soft warm light (golden) or cool architectural twilight (blue).
📅 When to book — Calgary in May
Travel writers usually only tell you when to go. Here's when to book flights and lodging for the best mix of price and availability, based on May's tier (Shoulder) and Calgary's popularity.
Crowds & pricing — May in Calgary
Calgary is in a shoulder season month — fewer crowds, slightly lower prices, and a calmer atmosphere than peak weeks. Most major sights stay open with normal hours, though a handful of seasonal restaurants or boat trips may run reduced schedules. Many regulars consider these months the best time to visit because you trade a small amount of weather reliability for a much more pleasant on-the-ground experience.
Sun & mosquito risk — May in Calgary
UV is a clear-sky sea-level estimate — clouds, altitude, and reflective surfaces (snow, water) shift it ±30%. Mosquito risk is climate-derived only; for current disease advisories (dengue, malaria, zika) check the CDC or WHO travel pages before your trip.
Calgary in other months
| Month | Avg high | Avg low | Rainfall | Rain days | Snow days |
|---|---|---|---|---|---|
| January | -1°C / 30°F | -11°C / 12°F | 12 mm | 11 | — |
| February | -2°C / 28°F | -13°C / 8°F | 20 mm | 13 | — |
| March | 5°C / 40°F | -8°C / 18°F | 21 mm | 13 | — |
| April | 11°C / 51°F | -2°C / 28°F | 31 mm | 16 | — |
| May | 17°C / 62°F | 4°C / 39°F | 56 mm | 18 | — |
| June | 21°C / 69°F | 9°C / 48°F | 100 mm | 21 | — |
| July | 24°C / 74°F | 11°C / 52°F | 62 mm | 18 | — |
| August | 23°C / 73°F | 11°C / 51°F | 62 mm | 15 | — |
| September | 17°C / 63°F | 6°C / 42°F | 41 mm | 13 | — |
| October | 10°C / 51°F | 0°C / 31°F | 30 mm | 13 | — |
| November | 2°C / 36°F | -7°C / 19°F | 23 mm | 12 | — |
| December | -3°C / 27°F | -12°C / 10°F | 19 mm | 10 | — |
Other cities with similar May weather
🌍 See the full ranked list of climate twins for Calgary in May →
Frequently asked questions
How hot is Calgary in May?
In May, Calgary averages a high of 17°C (62°F) and a low of 4°C (39°F) — generally mild and pleasant.
Does it rain a lot in Calgary in May?
May is quite rainy in Calgary, with about 18 rainy days on average.
Is May a good time to visit Calgary?
May is mild and pleasant but on the rainy side. It suits travelers who are comfortable with mild and pleasant weather; check the month-by-month ranking to compare it against the rest of the year.
What should I pack for Calgary in May?
Pack a warm jacket and layers, plus a compact umbrella or rain jacket. See the full May packing list for Calgary for a complete, climate-based checklist.
Check the live 10-day forecast and sunrise/sunset.