Calgary Weather in May
In May, Calgary averages a high of 16°C (62°F) and a low of 3°C (38°F), from 55 years of daily records (1971–2026).
16°C
Average high
62°F
3°C
Average low
38°F
32°C
Record high
89°F · May 17, 2006
-11°C
Record low
13°F · May 2, 1975
What May Is Like in Calgary
- 6 of the 10 warmest Mays on record in Calgary have come since 2012.
- May 2026 was the 3rd warmest May in 55 years of records, 3.0°C (5.4°F) above the long-run average.
- The coldest May reading, -11°C (13°F) on May 2, 1975, has not been matched in 51 years.
- Snow falls on about 2.2 days in a typical May.
At least 1 mm of rain falls on 25% of May days, and the month averages 57 mm in total.
Warmest: 2023 (22.1°C)Latest: 2026 (19.9°C)10-year averageLong-run average (16.4°C)
Look Up a Day in May
See the weather in Calgary on any May date, year by year.
Source: NOAA GHCN-Daily, Calgary Int'L Cs (1999–2026); University Of Calgary (1971–1990); Calgary Int'L A (1980–2012); Calgary Glenmore Dam (1971–1978). Averages cover 1971–2026. How we compute this