Seasons
Calgary's weather is more variable than almost anywhere else in Canada. Averages are close to useless here; what matters is the range.
The chinook
A warm wind off the mountains that can lift winter temperatures twenty degrees in a few hours. You'll see an arch of cloud on the western horizon before it arrives. It melts the snow, refreezes overnight into sheet ice, and gives a good part of the city a headache. All of that is normal.
Month by month
| Month | What it's like | Our take |
|---|---|---|
| January–February | Cold, bright, chinooks, icy footpaths | Fine if you're equipped and heading to ski |
| March | Snowiest month, often wet snow | The month we'd avoid |
| April | Unsettled, brown, cheap | Good value, low expectations |
| May | Green arrives, rain likely | Pleasant, pack a shell |
| June | Long days, thunderstorms late afternoon | Very good, and quiet before Stampede |
| July | Warm, Stampede takes over for ten days | Busy and expensive during Stampede |
| August | Warm, dry, occasional wildfire haze | Good, check air quality |
| September | Warm days, cold nights, larches turn late in the month | The best month, no argument |
| October | First snow, often melting the same week | Quiet and underrated |
| November | Grey, cold, nothing on | The other month we'd avoid |
| December | Cold and festive, markets and lights | Good if you like winter |
About Stampede. Ten days in July. The city genuinely changes character — free pancake breakfasts, offices half empty, everyone in boots. It's worth seeing once. It's also the worst time to come if you wanted a quiet trip, and hotel prices reflect that.
What to pack, honestly
Layers in every season. A wind shell all year. In winter, proper boots with grip matter more than the thickness of your coat, because the hazard is ice, not cold. In summer, something warm for the evening — it can drop fifteen degrees after sunset.