Calgary Weather

Calgary is a city of extremes, and temperatures have ranged anywhere from a record low of -45°C in 1893, to a record high of 36°C in 1919. It has a highland continental climate, with cool winters that are mild by Canadian standards and short, warm summers. The city’s climate is greatly influenced by its elevation and close proximity to the Rocky Mountains.

Spring (mid-March to May) and summer (June to August)

As a consequence of Calgary’s high elevation, summer evenings can be very cool. The average summer minimum temperature is 8°C (46°F), and frosts can occur in any month of the year. Although not common, Calgary experiences summer daytime temperatures of above 30°C on an average of about four days per year. Temperatures fall below -30°C on about five days per year, although extreme cold spells usually do not last very long. July and August are normally pleasant months for holidays in Calgary.

Autumn (September to November) and winter (November to mid-March)

Calgary has a dry climate, but the temperature and climatic conditions can vary from day to day. The weather in Calgary varies quite dramatically, from extreme cold in the winter to heat waves exceeding 32°C in the summer. Although Calgary’s winters can be uncomfortably cold, warm, dry Chinook winds routinely blow into the city from the Pacific Ocean during the winter months. Calgary has an average relative humidity of 55 per cent in the winter.

Average Temperature (°C)

20 15 10 5 0

Jan -10.0

Feb -7.9

Mar -3.3

Apr 4.0

May 9.6

Jun 13.4

Jul 16.4

Aug 15.3

Sep 10.5

Oct 5.4

Nov -2.5

Dec -7.1

Rainfall (mm)

90 68 45 22 0

Jan 13.8

Feb 14.9

Mar 20.3

Apr 26.5

May 53.6

Jun 81.6

Jul 65.0

Aug 57.1

Sep 40.1

Oct 18.0

Nov 16.0

Dec 14.1