The hottest month in Calgary is typically July, with daytime highs averaging around 23.4°C (74°F), based on 10 years of historical weather data. Overnight lows during this period average near 11.3°C (52°F).

What is the coldest month in Calgary?

The coldest month in Calgary is typically February, with overnight lows averaging around -13.8°C (7°F) and daytime highs near -2.9°C (27°F), based on 10 years of historical weather data. Freezing overnight temperatures are common during this month, so plan for icy conditions in the early morning.

Does Calgary have a rainy season?

Calgary doesn't have a sharply defined rainy season rainfall is fairly spread across the year based on 10 years of historical data. June is the wettest month on average (about 102 mm), while January is the driest (about 12 mm).

What's the best time of year to visit Calgary?

The best time to visit Calgary is typically July to September, when daytime highs average a comfortable 21.7°C (71°F). Rainfall during this window averages around 52 mm, one of the lighter, more comfortable stretches of the year. This is based on 10 years of historical weather data.

Is Calgary's air quality safe right now?

As of the latest reading, Calgary's air quality index (AQI) is 11, rated "Good", based on the nearest monitoring station. Air quality is considered satisfactory, with little to no health risk.

Atmospheric Details

Wind

9 km/h

N · Light Breeze · Max 18 km/h

Humidity

88 %

High · feels muggy

UV Index

Moderate

Visibility

16 km

Excellent

Pressure

892 hPa

Low · change likely

Dew Point

4°C

Dry air

Today vs Normal

11°C-7° below normal

The long-term average high for today is 18°C.

14 of the last 28 days with published data ran above normal.

It continues that pattern - today's forecast is also running below normal.

Red = above normal, blue = at or below · last 12 days

Air Quality

Good

Air quality is considered satisfactory, and air pollution poses little or no risk. It’s a good day to be active outside.

Health & Activity Advice

✅ Good for Outdoors

UV index is 5 today — moderate. Sunscreen is worth using for extended time outside, but no special precautions are needed for short trips.

Air quality is considered satisfactory, and air pollution poses little or no risk. It’s a good day to be active outside.

Conditions are comfortable for outdoor activity at most points during the day today.

It will feel cold outside — dress in layers if you're heading out.