When visiting Calgary, be prepared by bringing along clothes to add layers when necessary. You may need a coat, even in the summertime, because the mountain air gets quite chilly in the evenings after the sun goes down.
In contrast, be ready to wear short sleeves in January if the Chinook winds come your way while you’re there. Calgary’s weather is greatly influenced by the city’s close proximity to the Rocky Mountains (just 60 minutes away!); it has cool winters (though mild by Canadian standards) and short, warm summers.

The city is also one of the sunniest in Canada, with 2,405 hours of annual sunshine, on average. 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, giving Calgarians a break from the cold. 

As a consequence of Calgary's high elevation, summer evenings can be very cool, the average summer minimum temperature is 46°F, and frosts can occur in any month of the year. Calgary has experienced snowfall even in July and August! Unlike cities further east, like Toronto or Montreal, humidity is almost never a factor during the Calgary summer.

Current Calgary Weather

Observed at Calgary Int'l Airport on 2010-03-12 05:00:00

	-2°C Mainly Clear
		Feels Like		Wind	0 km/h
		Humidity	74 %	Pressure	100.9 kPa rising
		Dew Point	-5.9°C	Visibility	24.1 km
		Air Quality		Temperature	-1.8°C

Short Term Forecast

	Thursday Night	Friday	Friday Night	Saturday	Sunday
	Cloudy Periods	Sunny With Cloudy Periods	Cloudy Periods	A Mix Of Sun And Cloud	Sunny
Low	-3°C		0°C		-6°C
High		13°C		8°C	8°C

Detailed Calgary Weather Forecast

Thursday Night	Cloudy periods. Wind south 20 km/h becoming light late this evening. Low minus 3. Forecast issued 4:00 PM MDT Thursday 11 March 2010
Friday	Sunny with cloudy periods. Wind becoming south 30 km/h late in the morning. High 13. Forecast issued 4:00 PM MDT Thursday 11 March 2010
Friday Night	Cloudy periods. Wind south 20 km/h. Low zero. Forecast issued 4:00 PM MDT Thursday 11 March 2010
Saturday	A mix of sun and cloud. High 8. Forecast issued 4:00 PM MDT Thursday 11 March 2010
Sunday	Sunny. Low minus 6. High 8. Forecast issued 4:00 PM MDT Thursday 11 March 2010
Monday	Sunny. Low minus 4. High 11. Forecast issued 4:00 PM MDT Thursday 11 March 2010
Tuesday	Sunny. Low plus 4. High 15. Forecast issued 4:00 PM MDT Thursday 11 March 2010
Wednesday	A mix of sun and cloud. Low plus 3. High 13. Forecast issued 4:00 PM MDT Thursday 11 March 2010